39 3 3MB
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 1 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
Client Contractor Sub-Contractor
5Mhz
0mm
1mm
Sadara Daelim Sievert Arabia Limited
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 2 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
THIS OPERATING PROCEDURE IS CONTROLLED BY THE SIEVERT ARABIA LIMITED AND MAY NOT BE AMENDED, REVISED OR ALTERED IN ANY OTHER WAY WITHOUT THE CONSENT OF THAT COMPANY. THE SIGNATURES BELOW AUTHORISE ALL PAGES OF THIS PROCEDURE FOR USE FROM THE DATE OF APPROVAL SHOWN
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 3 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
Issue 01
6.35mm
5Mhz
Revision 00
0mm
1mm
Date 19 Mar 2014 th
Remarks Initial issue
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 4 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
Name
Prepared by Sumit Das
Position
ASNT Level II
Reviewed & Approved by A. Habibullah ASNT Level III (Certificate No. 195519)
Signature Date
19.03.2014
19.03.2014
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 5 of 111
PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
CONTENTS 1.0
SCOPE: ………………………………………………………………………… 4
2.0
PURPOSE: …………………………………………………………………….
4
3.0
REFERENCE: ………………………………………………………………….
4
4.0
TABLE OF ESSENTIAL VARIABLES FOR QUALIFICATION OF PROCEDURE: …………………………………………………………………
5
5.0
SAFETY: ……………………………………………………………………..
6
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 6 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
6.0
PERSONNEL QUALIFICATION: ……………………………………………
6
7.0
PREPARATION OF EXAMINATION AREA……………………………
7
8.0
INSPECTION EQUIPMENT AND ACCESSORIES: ………………………
7
8.1
ACQUISITION UNIT & SOFTWARE: ………………………………………
7
8.2
SCANNER DETAILS: ……………………………………………………...
8
8.3
SEARCH UNIT & WEDGES: ……………………………………………….
9
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 7 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
9.0
COMPUTRIZED IMAGING TECHNIQUE: …………………………………
9
10.0
COUPLANT: …………………………………………………………………..
9
11.0
CALIBRATION BLOCKS: ……………………………………………………
10
12.0
QUALIFICATION BLOCKS: …………………………………………………
12
13.0
CALIBRATION: …………...………………………………………………….
12
13.1
EQUIPMENT CALIBRATION: …………………………………………….
12
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 8 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
13.2
ENCODER CALIBRATION: ………………………………………………….
19
13.3
VELOCITY & WEDGE DELAY CALIBRATION: ………………………...
19
13.4
SENSITIVITY CALIBRATION: ……………………………………………...
19
13.5
TCG CALIBRATION………………………………………………………..
20
14.0
CALIBRATION CONFIRMATION: ………………………………………….
21
15.0
SCAN PLAN: …………………………………………………………………..
21
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 9 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
16.0
EXAMINATION COVERAGE & SCANNING: ……………………………...
22
17.0
RECORDING AND EVALUATION: …………………………………………
23
18.0
ACCEPTANCE CRITERIA: …………………………………………………..
28
19.0
REPORTING: ………………………………………………………………….
28
ANNEXURE-1………………………………………………………………………………..
30
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 10 of 111
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
1.0 SCOPE
5Mhz
0mm
1mm
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 11 of 111
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 12 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
This procedure describes the requirement and application of automated Phased Array examination for detection and evaluation of discontinuities within weld metal and heat affected zone of piping weld joints. This procedure, when used in combination with specified scanplan is applicable for joint configuration and thickness range as per table given below. Work to this procedure will be in compliance with ASME B31.3 Size Ø 1” to Ø 102”
2.0 PURPOSE
Material CS/AS/SS
Thickness 5.49 mm to 40.69 mm
Remarks --
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 13 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
This procedure shall apply to the general aspect of ultrasonic examination of welds using Phased Array technique and Omniscan equipment coupled with Weld ROVER or Magman Scanner. However the same fixture device to be used for examination, that shall be used during the procedure qualification. Main objective of this procedure is to Monitor the performance of the equipment used Set the display and acquisition parameter Provide details for calibration and sensitivity requirement Describe the recording criteria
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 14 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
Give the details of the equipment used and extent of volume coverage. Since the qualification of this procedure is unique to the Omniscan equipment, this procedure is not valid with any other instrument. HSMT scanner can be used wherever it is not possible to use Weld ROVER. For pipe diameter less than 4.5 inch Cobrascanner shall be used. 3.0 REFERENCE The following documents shall be referred in conjunction with this procedure: ANSI/ASNT CP-189-2006: ASNT Standard for Qualification and Certification of Nondestructive Testing Personnel.
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 15 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
BS EN ISO 13588;2012: Use of automated phased array technology ASTM E2700 – 09 Standard Practice for Contact Ultrasonic Testing of Welds Using Phased Arrays ASME Section V Article 4 (Edition 2010, Addenda 2011): Ultrasonic Examination Methods for Welds. ASME Section V Article 5 (Edition 2010, Addenda 2011): Ultrasonic Examination Method for Materials. ASME B 31.3(Latest Edition): Process Piping Sievert Arabia Limited Written Practice SAL/WP/QOP/001/2010 Omniscan Manual
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 16 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
4.0 TABLE OF ESSENTIAL VARIABLES FOR QUALIFICATION OF PROCEDURE Non In this Essential S. No Requirement essential Procedure variables variables (Page) Weld configurations to be examined, 1 including thickness dimension and base X 4 material product form ( pipe, plate, etc.,) The surface from which the examination shall 2 X 22 be performed 3 Technique(s) (straight beam, angle beam, X 4
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 17 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
4 5 6 7 8 9 10
6.35mm
5Mhz
0mm
1mm
contact, and/or immersion) Angles(s) and modes(s) of wave propagation in the material Search unit types(s), frequency (i.es), and element size(s) / shape(s). Special search units, wedges, shoes, or saddles, when used scanner and adhering and guiding mechanism Ultrasonic instrument(s) Calibration (calibration block(s) and technique(s) Directions and extent of scanning
X
-
21
X
-
9
X
-
9
X
X -
22 7
X
-
9
X
-
22
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 18 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
11 12 13 14 15 16 17 18
6.35mm
5Mhz
0mm
1mm
Scanning (manual Vs automatic) Method for discriminating geometric from flaw indications Method for sizing indications Computer enhanced data acquisition, when used Scan overlap (decrease only) Personnel performance requirements when required Personnel qualification requirements Surface condition (examination surface, calibration)
X
-
22
X
-
23
X
-
23
X
-
7
X
-
22
X
-
6
-
X
8
-
X
7
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 19 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
19 20 21 22 23 24 25 26 27
6.35mm
5Mhz
0mm
1mm
Couplant: brand name or type Automatic alarm and/or recording equipment, when applicable Records, including minimum calibration data to be recorded (e.g., instrument settings) Instrument manufacturer and model X Instrument software X Directions and extent of scanning X Method for sizing flaw length X Method for sizing flaw height X Data sampling spacing (increase only) X Requirement of a PA Examination Procedure
X
9
X
22
X
22
-
8 8 22 23 23 23
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 20 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
28 29 30 31
32 33
6.35mm
5Mhz
0mm
1mm
Search unit type, element size, pitch and gap X 9 dimension Focus Range X 21 Virtual Aperture Size X 9 Wedge Natural Refracted angle X 9 Requirements of a Phased Array S- Scanning Examination Procedure Sweep angular range(s) Angular sweep increment (incremental angle change, deg)
X
-
21
X
-
21
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 21 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
34
6.35mm
5Mhz
0mm
1mm
Aperture element numbers X (first and last)
X
-
21
X
-
21
X
-
21
X
-
21
Additional E scan requirements 35 36 37
Rastering angle(s) Aperture start and stop element numbers Aperture incremental change(s) (number of elements stepped)
5.0 SAFETY
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 22 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
All personnel are responsible for ensuring that they, as well as their fellow employees perform their job in a safe and professional manner, while adhering to the safety guidelines laid out in safety manual SAL-HS-CP-GSE. In addition they will also adhere to any statutory and local safety requirements along with any Client / Project specific safety requirements. 6.0 PERSONNEL QUALIFICATION Personnel performing non-destructive testing to this specification shall be qualified and certified in accordance with employer’s written procedure as per ANSI/ASNT CP-189-2006 as Level-II UT minimum. In addition, personnel who acquire and analyze PAUT data shall be trained on Omniscan MX equipment and certified to level
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 23 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
II in Phased Array as per SAL written practice and shall have minimum one year experience in PAUT activities. The personnel who acquire and interpret the PAUT Data shall participate the demonstration on Qualification block. Data acquisition and analysis shall be performed by a Level II or Level III; however only UT Level III personnel and qualified in PAUT shall perform final examination data package review. 7.0 PREPARATION OF EXAMINATION AREA Surface Preparation: On finished contact surface a minimum area of 150 mm on either side of the weld shall be free from dirt, weld spatters, corrosion product, surface irregularities or
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 24 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
foreign matter that might interfere with free movement of the search unit and affects the transmission of ultrasonic vibrations. When the base material or weld surface interferes with the examination, the base material or weld shall be prepared as needed to permit the examination. Surface preparation shall be under the client’s scope. Scribe line shall be marked at least on one side of joint configuration before starting the welding. Generally it is assumed that parent material has been tested using normal beam for planar flaw e.g. lamination, during various stages of fabrication. If the same not documented then prior to start of the PAUT inspection, the base metal and HAZ area shall be scanned using normal beam probe to locate reflectors that can limit the capability of the PAUT inspection to examine the weld volume.
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 25 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
Weld Identification: Weld joints shall be identified with Weld Seam No. This unique weld numbering system will be recorded as part of the file storage data. On the prepared area for inspection there will be a “zero” reference index and/or position numbers marked on the weld with paint marker arrow indicating the direction of scanning. All circumferential measurement shall be made clockwise from the zero reference position on the weld. 8.0
INSPECTION ACCESSORIES
EQUIPMENT
AND
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 26 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
8.10 ACQUISITION UNIT & SOFTWARE Omniscan MX 16/128(Olympus) Phased array inspection unit (Figure 1 (a)) which can be operated in pulse echo and/or pitch catch mode, shall be used in association to this procedure. Omniscan equipment fulfills the requirement of ASMI Sec V, Article-4 (Mandatory Appendices- III-431) PA instrument (T-431) requirement. Omniscan contains 16 independent pulser/receiver channels. The System is capable of generating the B-Scan, C-Scan, S-Scan display along with A-scan. Omniscan is capable of operation at frequencies over the range of 0.6 MHz to 18 Figure 1 (a) Omniscan MHz equipped with a calibrated stepped gain controls in units of 2 dB or less.
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 27 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
The data storing capabilities of the system requires the use of an external storage device, flash card or USB memory stick. In addition to data storage, the PC will also be used by the data-analysis personnel for analyzing data subsequent to the completion of data collection. Data-display and analysis software (Tomoview 2.7R6 or higher version) compatible to that residing on the Omni Scan phased array system shall also be used for data play back. Tomoview 2.7R6 – It is a powerful and versatile package that will be utilized for offline analysis of previous acquired data files.
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 28 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
Figure 1 (b) Data display in Tomoview
8.20 SCANNER DETAIL WeldROVER Weld ROVER is a small and easy to operate one axis encoded, motorized scanner. It can be used on plates and
Figure 1 (c) WeldRover
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 29 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
pipe like structures. Four magnetic wheels hold the scanner, to move around the weld. It can support up to 6 probes for ToFD & PA inspection. This scanner is having good speed control, can move from 5mm/µsec to 50 mm/ sec. WeldRover is having Laser guide for better weld tracking. Magman / HSMT-X03 Scanner is a one axis encoded, manual scanner. This scanner can hold up to 10 probes for either phased array or conventional UT, in order to obtain optimal coverage of the entire weld volume. The basic configuration is intended for construction welding Figure 1 (d) Magman/ HSMT-X03
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 30 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
inspection. In order to be used in more restricted areas, the scanner can also be reconfigured with the provided short frame bars. The COBRA manual scanner is able to inspect standard pipes as small as 0.84 in. OD to 4.5 in. OD. This scanner uses the Omniscan MX/MX2 flaw detector with the 16:128 module, and the MXU software to inspect circumferential welds on small-diameter pipes.
Figure 1 (e) Cobra Scanner
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
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The Omniscan ultrasonic system will be suitably interfaced with an automatic/semiautomated scanner drive mechanism that moves the probes in one encoded axis. Four industrial strength magnetic wheels make it suitable to move on ferromagnetic materials (used in power plant and petrochemical industries). Mechanical holders are used to ensure that the probe spacing is maintained at a fixed distance. The mechanical holder for the probes shall be equipped with a positional encoder that is synchronized with the sampling A-scan of signals. For WeldROVER Motion controller allows 10 different scan speeds from 5mm/µsec to 50mm/µsec with a resolution of 2100 steps/mm. For Magman / HSMT X-03 resolution of encoder is 12 steps/mm and manual scanning shall be done with Mini-wheel encoder.
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Document No.
PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 32 of 111
Wedge: ST1-60L-IHC Length
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8.30 SEARCH UNIT & WEDGES This procedure uses the following probes and wedges for Phased Array PA Probe
Frequency
Number of Elements
Active Aperture
Elevation
Element Size
Supportive Wedge
5L64 A2
5 MHz
64
38.4 mm
10 mm
0.60 mm
SA2 N55S IHC
10L32-10
10MHz
32
9.9 mm
7 mm
0.30 mm
SA10 N55S IHC
7.5CCEV
7.5Mhz
16
8.0 mm
10 mm
0.50 mm
SA15 N60S IHC
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0mm
1mm
9.0 COMPUTRIZED IMAGING TECHNIQUE The major attribute of Computerized Imaging Techniques (CITs) is their effectiveness when used to characterize and evaluate indications: however, CITs may also be used to perform the basic scanning functions required for flaw detection. Computer-processed data analysis and display techniques are used in conjunction with automatic or semiautomatic scanning mechanisms to produce two and three – dimensional images of flaws, which provide an enhanced capability of examining critical components and structures. Computer processes may be used to quantitatively evaluate the type, size, shape, location and orientation of flaws detected by ultrasonic examination or other NDE methods. Phased array ultrasonic examination is one of the computerized imaging techniques.
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20.31mm 31.75mm
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0mm
1mm
10.0 COUPLANT Acoustic coupling shall be obtained by using a medium (oil, grease, cellulose, water) suitable for the purpose. Temperature of the part to be scanned shall be taken into considerations while selecting the couplant. An environmentally safe wetting agent, such as water (up to 50 oC) will be required to promote acoustic coupling, however, no residue will remain on the work-piece surface after the water has been evaporated. During examination same couplant shall be used as during calibration. 11.0 CALIBRATION BLOCK
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6.35mm
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0mm
1mm
The inspection system shall be calibrated using standard calibration blocks and reference blocks. The calibration block material shall be a nozzle dropout from the component or a component prolongation or material of the same specification product form. The calibration block shall receive the same heat treatment as the part to be tested. The surface of the calibration, at no time shall be inferior to that of the component. When the component material to be examined is clad, the block shall be clad by the same welding process as the production part. Basic Calibration Block Drawing
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Wedge: ST1-60L-IHC Length
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Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
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0mm
1mm
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 36 of 111
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Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
Note: Details of required calibration block for this procedure are mentioned in the below table. Calibration Block & Mock Up block requirement for Carbon Steel
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Wedge: ST1-60L-IHC Length
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Transducer: C543-SM Shape Diameter Frequency Length Width Round
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0mm
1mm
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19th Mar 2014
ISSUE 01, REV. 00
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20.31mm 31.75mm
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6.35mm
5Mhz
0mm
1mm
Calibration Block & Mock Up block requirement for Alloy Steel
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Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
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6.35mm
5Mhz
0mm
1mm
Calibration Block & Mock Up block requirement for Stainless Steel
Note: Number of required Mock up block depends on Clients & Contractor requirement.
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0mm
1mm
12.0 QUALIFICATION BLOCKS Qualification block shall be prepared from the same product form and material specification or equivalent P-numbers. In case of dissimilar metal welds the material selection shall be based on the side of the weld from which the examination will be conducted. If examination will be conducted from both sides, calibration reflectors shall be provided in both the materials. Prior to the fabrication the block material shall be completely examined with straight beam search unit. When the component material is clad, the block shall be clad by the same welding procedure as the production part. Qualification block shall be prepared by welding or HIP provided the acoustic properties are similar and shall receive the same heat
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0mm
1mm
treatment as the part to be tested. Block’s weld geometry shall be representative of production joint. The qualification block shall be within ±25% of the thickness to be examined. For welds joining two different thickness of material, demo block thickness shall be based on thinner of the two materials. The qualification block shall contain a minimum of three flaws parallel to the production weld axis as follows— 1. One surface flaw on the OD surface 2. One surface flaw on the ID surface
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6.35mm
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0mm
1mm
3. One subsurface flaw In case the block can be flipped during UT examination then one flaw may represent both ID and OD surfaces. When due to obstruction the weld examination can only be performed from one side of the weld axis, the qualification block shall contain two sets of flaws, one set on each side of the weld axis. Flaw size shall be based on the qualification block thickness and shall be no longer than that specified by Referencing code Section. Qualification block shall be scanned and the qualification data saved as per the procedure and shall be available to the inspector.
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0mm
1mm
Flaws shall be sized and categorized in accordance with the written procedure being qualified. Automated and semi-automated acceptance performance criteria is defined as the detection of all the flaws in the demonstration block and (a) Recorded responses or imaged lengths, as applicable, exceed the specified evaluation criteria of the procedure (b) The flaws are sized as being equal to or greater than their actual size (i.e., both length and height) (c) The flaws are properly categorized (i.e., surface or subsurface)
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Wedge: ST1-60L-IHC Length
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6.35mm
5Mhz
0mm
1mm
Supplemental manual technique(s) (For Transverse Reflectors) acceptable performance criteria is defined as the demonstration block’s flaws being (a) Sized as being equal to or greater than their actual size (i.e., both length and height) (b) Properly categorized (i.e., surface or subsurface) Demonstration Block Record The following information shall be recorded: (a) The information specified by the procedure being qualified
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0mm
1mm
(b) Demonstration block thickness, joint geometry including any cladding or weld overlays, and flaw data [i.e., position in block, size (length and height)], separation distance to nearest surface, category (surface or subsurface) (c) Scanning sensitivity and search unit travel speed (d) Qualification scan data (e) Flaw sizing data [same information as flaw data in 13.0 CALIBRATION 13.10 EQUIPMENT CALIBRATION
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Document No. SAL-TECH-SOP-PA-006-2014
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Wedge: ST1-60L-IHC Length
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Exit Point
20.31mm 31.75mm
8mm
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6.35mm
5Mhz
0mm
1mm
Due to the digital control nature of PAUT instruments and also due to the fact that multiple pulser and receivers are used, instruments are subject to screen height and amplitude control linearity checks. Linearity checks shall be as per section T-461.1 & 461.2 (Mandatory appendix I & II) of ASME Section V, Article 4. .In the case of PA, the amplitude control linearity shall be evaluated for each pulser-receiver circuit. The results of these checks are recorded in the ultrasonic instrument linearity forms and are kept as a part of the inspection record. Instrument linearity checks are conducted on a twelve month cycle. Prior to the start of shift operator need to carry out an element check and ensure that probe is in working condition and ensure that no more than 10% of elements are inactive and no two adjacent elements are inactive. Ensure the proper couplant
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
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Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
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6.35mm
5Mhz
0mm
1mm
between the probe and wedge. Once data is collected make sure that data missing lines do not exceed the allowable limit. TEST SET-UP
1) The phased array instrument is configured to display an A-scan presentation. 2) Adjust the time-base of the A-scan to a suitable range to display the pulse-echo signals selected for the linearity verifications. A linearity block similar to that described in E 317 is selected to provide signals to assess linearity Fig 2_ Custom Linearity Blocks for Phased-Array Instrument and Probe Assessments
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6.35mm
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0mm
1mm
aspects of the instrument. Such a block is showing in Fig. 2 with a single element probe mounted on it. 3) Pulser parameters are selected for the frequency and bandpass filter to optimize the response from the pulse-echo (single element) probe used for the linearity verifications. In Olympus Omniscan the following tests are conducted: Screen height linearity check Amplitude control linearity check Horizontal linearity check 13.1.1 DISPLAY HEIGHT LINEARITY
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Exit Point
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6.35mm
5Mhz
0mm
1mm
1) With the phased array instrument connected to a probe (shear or longitudinal) and coupled to any block that will produce two signals as shown in fig.5a adjust the probe such that the amplitude of the two signals are at 80% and 40% of the display screen height. 2) If the phased array instrument has provision to address a single element probe in pulse-echo mode then the two flat bottom holes with adjustable acoustic impedance inserts in the custom linearity block shown in Fig. 3 provides such signals. 3) Increase the gain using the receiver gain adjustment to obtain 100% of full screen height of the larger response. The height of the lower response is recorded at this gain setting as a percentage of full screen height. 4) The height of the higher response is reduced in 10% steps to 10% of full sceen height and the height of the second response is recorded for each step.
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Width
Exit Point
20.31mm 31.75mm
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6.35mm
5Mhz
0mm
1mm
5) Return the larger signal to 80% to ensure that the smaller signal has not drifted from its original 40% level due to coupling variation. Repeat the test if variation of the second signal is greater than 41% or less than 39% FSH. 6) For an acceptable tolerance, the response from the two reflectors should bear a 2 to 1 relationship to within ±3% of full screen height throughout the range 10% to 100% (99% if 100% is saturation) of full screen height. 7) The results are recorded on an instrument linearity form.
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Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
13.1.2 AMPLITUDE CONTROL Fig 3_ Display Height Linearity LINEARITY 1) A 16/64 phased-array instrument has 16 pulsers and receivers that are used to address up to 64 elements. Each of the pulser-receiver components is checked to determine the linearity of the instrument amplification capabilities. 2) Select a flat (normal incidence) linear array phased-array probe having at least as many elements as the phased-array ultrasonic instrument has pulsers.
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ISSUE 01, REV. 00
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Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
3) Using this probe, configure the phased-array ultrasonic instruments to have an electronic raster scan. Each focal law will consist of one element and the scan will start at element number 1 and end at the element number that corresponds to the number of pulsers in the phased-array instruments. 4) Couple the probe to a suitable surface to obtain a pulse-echo response from each focal law. The backwall echo from the 25 mm thickness of the IIW block or the backwall from the 20mm thickness of the custom linearity block provides the suitable target option. 5) Select channel of the pulser-receivers of the phased-array instrument. Using the Ascan display, monitor the response from the selected target. Adjust the gain to bring the signal to 40% screen height. This is illustrated in Fig.4.
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
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Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 55 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
Fig 4_ A-Scan Display of Backwall Echo on channel 1 of a phased-Array Instrument
1) Add gain to the receiver in the increments of 1 dB, then 2 dB, then 4 dB then 6 dB. Remove the gain added after each increment to ensure that the signal has returned to 40% display height. Record the actual height of the signal as a percentage of the display height. 2) Adjust the signal to 100% display height, remove 6-dB gain and record the actual height of the signal as a percentage of the display height. 3) Signal amplitudes should fall within a range of ±3% of the display height required in the allowed height range of Table.
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Width
Exit Point
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8mm
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6.35mm
5Mhz
0mm
1mm
4) Repeat the sequence from 5 to 7 for all other pulser-receiver channels.
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Wedge: ST1-60L-IHC Length
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Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
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6.35mm
5Mhz
0mm
1mm
13.1.3 TIME-BASE LINEARITY (HORIZONTAL LINEARITY) 1. Configure the phased array instrument to display an A-scan presentation. 2. Select any compression wave probe and configure the phased-array instrument to display a range suitable to obtain at least ten multiple back reflections from a block of a known thickness. The 25-mm wall thickness of the IIW block is a convenient option for this test. 3. Set the phased-array instrument analog-to-digital conversion rate to at least 80 MHz.
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6.35mm
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0mm
1mm
4. With the probe coupled to the block and the A-scan displaying 10 clearly defined multiple as illustrated in Fig. 5
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Wedge: ST1-60L-IHC Length
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Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
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6.35mm
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0mm
1mm
Fig 5_ Horizontal Linearity A-Scan Horizontal Linearity A-Scan 5. The display software is used to assess the interval between adjacent backwall signals. 6. Acoustic velocity of the test block, determined using the methods described in E 494, is entered into the display software and the display configured to read out in distance (thickness). 7. Using the reference and measurement cursors determine the interval between each multiple and record the interval of the first 10 multiples
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6.35mm
5Mhz
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8. Acceptable linearity may be established by an error tolerance based on the analog-todigital conversion rate converted to a distance equivalent. For example, at 100 MHz each sample of the timebase is 10 ns. For steel at 5900 m/s each sample along the timebase (10 ns) in pulse-echo mode represents 30 µm. A tolerance of ±3 timing samples should be achievable by most analog-to –digital systems. Some allowance should be made for velocity determination error ( ~ 1%). Typically the errors on the multiples should not exceed ±0.5 mm for a steel plate. 13.1.4 PHASED-ARRAY ELEMENT ACTIVITY VERIFICATION 1.
The Phased Array probe shall be checked to determine that all elements of the
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phased array probe are active and of uniform acoustic energy. Because, during normal operation in a timed sequence, each of the elements is addressed by a separate pulser and receiver, a method from element to element and any differences are attributable to the probe itself. To ensure channel is selected to address each element.
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2. Any Phased Array Probe that has greater than 25% defective element of the usable aperture should be replaced with a new probe. Continuity Display for Phased-Array Instrument or Cable Test Method: 1. Connect the phased array probe to be tested to the phased-array ultrasonic instrument and remove any delay line or refracting wedge from the probe. Acoustically couple the probe to the 25-mm thickness of an IIW (International Institute of Welding) block with a uniform layer of couplant. This may be
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accomplished by a contact-gap technique such that the probe-to-block interface is under water (to ensure uniform coupling). 2. Configure an electronic scan consisting of one element that is stepped along one element at a time for the total number of elements in the array. (This should ensure that the pulser-receiver number 1 is used in each focal law or if the channel is selectable it should be the same channel used for each element). Set the pulser parameters to optimize the response for the nominal frequency of the probe array and establish a pulse-echo response from the block back wall or water path to 80 % display height for each element in the probe. Observe the A-scan display for
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each element in the array and record the receiver gain required to achieve the 80 % signal amplitude for each element. 3. Note and record any elements that do not provide a back wall or water path signal (inactive elements). 13.2 ENCODER CALIBRATION The encoder shall be connected to the Omni Scan equipment and the calibration wizard shall be used to calibrate the encoder. Through the menu wizard set up, all the parameters are fed and the encoder is made to scroll on a pre-determined known length from initial position, press calibrate, get the calibration done. Encoder calibration shall be confirmed by moving a minimum distance of 500mm and the
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distance displayed being ±1% of the actual distance moved. Encoder calibration shall be carried out prior to the first use and not to exceed one month. 13.3 VELOCITY & WEDGE DELAY CALIBRATION For contact examinations the temperature differential between the calibration block and examination surface shall be within 14o C. Compensation for delay in the wedge is required so as to ensure that indications detected are poisoned correctly. The wedge delay calibration shall be carried out for both linear scan and as well as sectorial scan. The velocity & wedge delay calibration can be carried out in sound path (using 50mm, 100mm radius of V1 block) mode or true depth (using SDH’s) mode with known reflector having fixed sound path or depth
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respectively. Peak up this signal from the calibration reflector and scan the phased array probe backwards through all the different angles or focal laws. Scan forward over the calibration reflector through all the refracted angles of focal laws. When the signal for all angles and focal laws lies within the threshold, Omniscan system dynamically adjusts delay setting to correctly indicate radius (depth). Figure (6) shows the screen display during wedge delay calibration.
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Figure (6): Wedge delay calibration
13.4 SENSITIVITY CALIBRATION
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Variation between electronics of pulsers and receivers and variation between probe elements results in small gain variation from one focal law to the next. Also the variation in path distance in both wedge and steel will result in some focal laws requiring more gain. So to compensate for this Omniscan shall be calibrated for sensitivity, which can be carried out dynamically. The sensitivity calibration shall provide the required gain adjustments for each refracted angle and sound path used. Select a calibration reflector, which is within the zone of material to be examined. Peak up this signal from the calibration reflector and scan the phased array probe backwards through all the different angles or focal laws. Scan forward over the calibration reflector through all the refracted angles of focal laws. The Omniscan
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System calculates the required gain needed at each focal law to adjust the amount of gain required to obtain the sensitivity. Figure (7) illustrates the example of special screen feature used to ensure the sensitivity (amplitude response) from each focal law. All focal laws provide a uniform amplitude response to the calibration reflector. As the operator moves the probe back and forth over a calibration reference reflector, unit software automatically adjusts gain to the prescribed amplitude 80% with +5% tolerance limit. The horizontal scale is the virtual probe aperture (VPA) which defines the group of elements i.e. focal law that is sequenced in the scan. These focal laws are either linear or sectorial depending on whether E-scan of S-scans is being calibrated.
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Figure (7) Sensitivity Calibration (S-Scan)
13.5 TCG CALIBRATION
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Time corrected gain (TCG) calibration shall be applied to compensate for attenuation in the material for the sound paths used during calibration and examination. Generally Phased array inspection is being done in full skip so in order to compensate for the attenuation; calibration shall be performed as per the plan shown below. (Figure (8) using Notch).To obtain the TCG calibration, peak the signal from the respective Notch’s and adjust the gain to obtain 80% of amplitude from the reflector. Place the phased array probe perpendicular to the ID notch axis. Move the phased array probe forward and backward to equal the amplitude for all the focal laws and angles and plot the first point. The same process is repeated to set the response from OD notch in full skip distance for each focal law at 80% FSH. Omniscan uses the gain compensation required due to attenuation in the sound travel and adjust the gain for all focal laws/angles. Once all the points are picked the TCG can be accepted. TCG
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calibration has to be carried out for all scan plans in a multi group option while using phased array probe. The examination system calibration shall be stored in the Omni scan System with electronic memory, on an external chip or data storage device. This calibration may be used at a later date provided that the system calibration is verified prior to the examination. A complete ultrasonic system calibration shall be performed at least once prior to the examination.
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Figure (8) PA Calibration Using Notch’s
14.0 CALIBRATION CONFIRMATION
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A system calibration confirmation shall be used to verify sensitivity at the start and finish of each examination using the appropriate calibration block. The sensitivity control settings are adjusted to match those recorded for reference sensitivity. The search unit is positioned to detect the first and last point on the TCG using the reference reflectors. The examination deemed to be void if any point on the TCG decreased by 20% or 2dB of its amplitude. All inspection since last valid calibration needs to be rescanned. If the sensitivity has increased all recorded indications since last valid calibration or calibration check shall be reexamined and there values shall be changed on data sheet. Any change in search unit, wedge and ultrasonic instrument cause for a new calibration.
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15.0 SCAN PLAN A documented examination strategy shall be provided showing search unit placement and movement that provides a standardized and repeatable methodology for the examination. Scan plan shall include beam angles and direction with respect to the weld axis reference point, weld geometry and number of zones. Scan plan provides clear view of scanning, helping to clearly convey weld coverage, HAZ coverage and probe position, in addition to critical dimensions. The beamset parameters dialog displays a visual representation of the transducer elements that are used to form the beamset. Varying the focus of the beam is the capability of PA instrument, but generally focusing is not the norm for weld inspection.
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Beam spread visualization allows you to more accurately see the beam coverage and near field visualization ensures that any focusing being performed is within the near field. True Depth, Projection and Half Path focus types can be visualized in the workspace and documented as a technique report. These all is achieved with the help of ESbeam software tool. The scan plan for inspection of full volume of given weld geometry and thickness are given in Annexure: 1 Note: Scan plan given below may require modification based on the actual field conditions to achieve optimum inspection results. Such improvements are applicable provided it has been demonstrated successfully on the qualification block. 16.0 EXAMINATION COVERAGE & SCANNING
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The ultrasonic examination area shall include the volume of the weld plus the lesser of 25mm or thickness on each side of the weld or Alternatively, examination volume may be reduced to include the actual heat affected zone (HAZ) plus 6 mm (1/4 in.) of base material beyond the heat affected zone on each side of the weld provided the following requirements are met: (1) The extent of the weld HAZ is measured and documented during the weld qualification process; and (2) The ultrasonic transducer positioning and scanning device is controlled using a reference mark (paint or low stress stamp adjacent to the weld) to ensure that the actual HAZ plus an additional 6 mm (0.25 in.) of base metal is examined.
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The required volume of the base material and weld to be examined shall be scanned from outer surface/inner surface using a linear scanning technique with encoder. The level of gain used for scanning shall be appropriate for the configuration being examined and shall be capable of detecting the calibration reflectors at the maximum scanning speed. Each linear scan shall be parallel to the weld axis and at a constant standoff distance with the beam oriented perpendicular to the weld axis from the zero datum point. Scanning mechanisms shall be used to maintain a constant distance and alignment between the index points of the two probes. Scanning mechanisms can either be motor or manually driven with encoder. They shall be guided by means of a suitable guiding mechanism (steel band, belt, automatic track following systems, guiding wheels etc.). Guiding accuracy with respect to the centre of a reference line
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(e.g. the centre line of a weld) should be kept within a tolerance of ±10 % of the probe index point separation. The scan plan shall demonstrate by plotting or with using a computer simulation the appropriate examination angles for zones at different depth. This scan plan shall be documented to show that the examination volume was examined. This scan plan shall be a part of the final examination report. More than one line scan may be required to ensure complete coverage of the weld and heat affected zone. A maximum sampling of 1mm shall be set for and be used between A-scans collected for thickness up to 50mm. A 2mm resolution can be used for thicknesses more than 50mm. Scanning speed shall not exceed 150 mm/µsec. Scanning speed will be limited by mechanical ability to maintain acoustic coupling and by the system’s electronic ability to ensure
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full wave forms are captured without missing data points. Scanning speed shall not exceed that qualified. Missing of data lines shall not exceed 5% of the total acquisition with adjacent data shall not be missed. Omni Scan equipment has the capability of rewriting the data while observed loss of data. The encoder is retrieved back to home position whenever data is missed. Missing data is represented by black lines in the display. Between two consecutive scans there should be an overlap of 50 mm. Repaired weld area shall be rescanned with an overlap of minimum 50mm at the start and end of the scan. The joints having scanning access from one side only (e.g.- pipe to fittings) shall be scanned from pipe side with minimum two line scans from two different probe index.
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Weld reinforcement shall be flush grinded to make the surface parallel to parent material for one side access joints. Note: For Pipe to Pipe joints no need to remove the weld cap reinforcement. Only for Pipe to Fitting joints weld cap reinforcement shall be removed as mentioned above. 17.0 RECORDING AND EVALUATION A scan data shall be recorded for the area of interest in an unprocessed form with no thresholding at a minimum digitization rate of five times the examination frequency and recording increment of a maximum of 1mm for material less than 50mm thick
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and 2mm for material having thickness greater than 50mm. Calibration check data shall also be recorded. Only Trained Level II - UT operators with hands on training Omni Scan shall calibrate and carry out UT inspection. Only personnel certified Level II or III in Ultrasonic testing along with knowledge of phased array and Omni Scan equipment shall evaluate the results of ultrasonic examinations for acceptance. For amplitude base technique, the location, amplitude and extent of all reflectors that produces a response greater than 20% of the reference level shall be investigated and those having amplitude greater than equal to 50% shall be recorded. Non Relevant Indications
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Signals which are determined to originate from metallurgical discontinuities (such as cladding to base material interface) and/or geometrical features (such as weld reinforcement or root geometry) may be classified as geometric indication. Such reflectors are not characterized as indications nor compared with allowable indication standard. The presence of geometric reflectors is confirmed either by reviewing the fabrication drawing of the weld preparation or by plotting the reflectors co-ordinates or by supplemental inspection (PT, MT, and ET etc) result. In addition to reporting indications, area of restricted access which cannot be scanned shall be recorded and reported
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Relevant Indications Signals that are determined to result from welding flaws will be assessed according to the acceptance criteria in ASME B31.3. For PA flaw sizing is performed by measuring the vertical extent and the cross sectional distance at 6dB level. A sizing procedure qualified by performance demonstration will be used to assess all indications interpreted to be flaws. TomoView software should be used for further processing which enhances the interpretation of the discontinuities. Size & Category
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Dimensions of the flaw shall be determined by rectangle that fully contains the area of the flaw. Length of the flaw is the dimension of the rectangle parallel to pressure retaining surface, and the height of the flaw is the dimension of rectangle perpendicular to the pressure retaining surface. Flaws shall be characterized as being surface or subsurface based on their separation from the nearest component surface: 1. If space is equal to or less than one half of the height of the flaw than flaw shall be categorized as surface flaw. 2. If space is greater than one half of the height of the flaw than flaw shall be categorized as subsurface flaw.
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Surface Indications
S a Figure 9: Classification of Surface & Sub surface Indications
Flaws shall be evaluated for acceptance using the applicable criteria for the respective thickness, with the following additional requirements-Flaws identified as surface flaws during the UT examination may or may not be surface connected. Therefore, unless the UT data analysis confirms that the flaw is not surface connected, it shall be considered surface connected or a flaw open to the surface, and is unacceptable unless surface examination is performed. If the flaw is surface connected, the requirements above still apply. However, in no case shall the flaw exceed the acceptance criteria in this Division for the material employed. Acceptance surface examination techniques are as follows:
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(1)
Magnetic particle examination (MT) in accordance with ASME 2011a SECTION VIII, DIVISION 2 paragraph 7.5.6
(2)
Liquid penetrant examination (PT) in accordance with ASME 2011a SECTION VIII, DIVISION 2 paragraph 7.5.7
(3)
Eddy Current examination (ET) in accordance with ASME 2011a SECTION VIII, DIVISION 2 paragraph 7.5.8
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0mm
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Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 92 of 111
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 93 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
Figure (10) Multiple Planar Flaws Oriented in a Plane Normal to the Pressure Retaining Surface
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 94 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
i.
Discontinuous flaws shall be considered a singular planar flaw if the distance between adjacent flaws is equal to or less than the dimension S as shown in Figure (10).
ii.
Discontinuous flaws that are oriented primarily in parallel planes shall be considered a singular planar flaw if the distance between the adjacent planes is equal to or less than 13 mm. (see Figure 11).
iii.
Discontinuous flaws that are coplanar and nonaligned in the through-wall thickness direction of the component shall be considered a singular planar flaw if the distance between adjacent flaws is equal to or less than S as shown in Figure (12).
iv.
For Subsurface Flaws the flaw length shall not exceed 4t.
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 95 of 111
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 96 of 111
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 97 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
Figure (11) Surface and Subsurface Flaws
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 98 of 111
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 99 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
Figure (12) Non-Aligned Coplanar Flaws in a Plane Normal to the Pressure Retaining Surface
18.0
ACCEPTANCE CRIETERIA
Results of weld inspections to this procedure shall be compared to the requirement of acceptance criteria as defined in ASME B 31.3 A linear-type discontinuity is unacceptable if the amplitude of the indication exceeds the reference level and its length exceeds: (a) 6 mm (1⁄4 in.) for Tw ≤ 19 mm (3⁄4 in.); (b) Tw /3 for 19 mm < Tw ≤ 57 mm (21⁄4 in.);
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 100 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
(c) 19 mm for Tw > 57 mm. 19.0 REPORTING The following data shall be reported in the final report a. Procedure identification and revision. b. Instrument Identification including manufacturer’s serial number. c. Transducer type, serial number, angle and frequency. d. Cables used, type and length.
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 101 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
e. Probe center spacing (PCS), Data sampling spacing. f. Couplant used g. Special equipment when used (search units, wedges, shoes, automatic scanning equipment, recording equipment etc) h. Computerized programmed identification and revision when used i. Calibrations block identification. j. Instrument reference level gain and, if used damping and reject settings. k. Calibration data including reference reflectors, indication amplitude and distance reading.
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 102 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
l. Data correlating simulation blocks and electronic simulator, when used, with initial calibration. m. Identification and location of weld or volume scanned. n. Surface condition. o. Record of indications identified to be rejected. p. Areas of restricted access or inaccessible welds. q. Examination personnel identity and when required by referencing code section, qualification level. r. Date and time examinations were performed.
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 103 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
REPORT FORMAT (SAMPLE)
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 104 of 111
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 105 of 111
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812
Document No.
PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 106 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
Annexure-1
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 107 of 111
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 108 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
Scanplan Details Note: AOD wedges shall be used as per the joint OD size & Wedge AOD range Scanplan View for 6.35 mm to 8.18 mm Thickness
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 109 of 111
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
Scanplan View for 9.27 mm to 12.7 mm Thickness
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 110 of 111
SIEVERT ARABIA LIMITED Dammam - Saudi Arabia Tel. 03 8411 846 Fax. 03 8411 812 PROCEDURE FOR AUTOMATED PHASED ARRAY INSPECTION OF PIPING WELD JOINTS
Wedge: ST1-60L-IHC Length
Width
Exit Point
20.31mm 31.75mm
8mm
Transducer: C543-SM Shape Diameter Frequency Length Width Round
6.35mm
5Mhz
0mm
1mm
Document No. SAL-TECH-SOP-PA-006-2014
19th Mar 2014
ISSUE 01, REV. 00
Page 111 of 111