Aramco Hot Tap Welding Procedure Rev. 1 [PDF]

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SAUDI ARAMCO WELDING PROCEDURE SPECIFICATIONS

Hot Tap

WPS No. Application:

Piping

Service

Pipeline

X

Group

1, 2

Yes No

TO P-No.

1

Group

BM Thickness Range:

Groove

Pipe Diameter Range:

Groove Fillet

Tank

PWHT

E7018-1 2.3, 3.2, 4.0 50.8mm

Max. Deposit Thickness

Unlimited 50.8mm-Unlimited Unlimited

SAW Electrode-Flux (Class.)

N/A

Flux Trade Name

N/A

SAMS S/N Other None POST WELD HEAT TREATMENT Temperature Range None

107 C For all welding

Time Range Interpass Temp.

315 C Maximum.

GAS Shielding Gas (Type) Flow Rate

N/A

None

Gas Backing Flow Rate

N/A

Cooling Rate

N/A

Other

None

Other

TECHNIQUE & ELECTRICAL CHARACTERISTICS Tungsten Electrode Size and Type N/A

Method of Backgouging

Fillet

All

Welding Progression

N/A

None

String or Weave Bead

N/A

Heating Rate

POSITION Groove

N/A

Gas Backing (Type)

None N/A

Multiple or Single Passes

Stringer and Weave N/A

All

V-UP

Orifice or Gas Cup Size

Multiple

Contact Tube to Work Distance

Initial & Interpass Cleaning (Brushing, Grinding, etc.)

N/A

Brushing & Grinding

JOINT SKETCH SIDE

1 1 1 1

Other Department

PASS

Fill Fill1 Fill Fill

PROCESS

FILLER METAL

SMAW SMAW SMAW SMAW

E7018-1 E7018-1 E7018-1 E7018-1

A=

C=

B=

D=

SIZE (mm)

2.4 3.2 3.2 4.0

POL.

DCRP DCRP DCRP DCRP

VOLT.

TRAVEL SPEED (cm/min)

AMP.

23-29 22-28 20-26 20-25

70-100 90-160 90-160 140-185

Other Dimensions/Comments:

. Revision Date

Consulting Services Department

Approval restrictions WPS No.

SMAW

A5.1

Size of Filler Metals

Other PREHEAT Preheat Temp.

Other

Welding Process

Yes No

AWS No. (Class.)

4.8-50.8mm

1 of 1

Page

Other

Structural

FILLER METAL Spec. No. (SFA)

1, 2

Carbon Steel, to API 5L X60, equivalent grade

0

PQR Revision No.

Minimum Design Temperature

Material Specification (typical)

Fillet

P1-5

PQR No.

Pressure Vessel

X

Impact Toughness

Sour Non-Sour

BASE METAL P-No. 1

0

WPS Revision No.

Hot Tap

Oct 5, 2008

None WPS Revision No.

0

PQR No.

P1-5

PQR Revision No.

0

Page

2 of 2

Hot Tap welding Procedure; Rev. 0 Page 2 of 2 October 5, 2008 D. Niemeyer 1

2 3

4

5

6

7

8

                                     

Hot tap fitting and sleeve details shall be in accordance with Drawing AB-036719-001. Typical details for full encirclement sleeve longitudinal and fillet welds are shown in figures 1 and 2. The installation of Hot taps shall be in accordance with SAEP-311. The preheat shown on the welding procedure must be followed for all welding. E7018-1 electrode must be maintained dry. Electrodes must be used from newly-opened, sealed metal containers or maintained dry in accordance with the storage and baking procedure listed in SAES-W-012 Table 1. When a sticker is applied to a header pipe, the weld shall be examined visually and by MPI and UT prior to installing the reinforcing pad. The testing and acceptance criteria shall be in accordance with API 1104. The testing and acceptance criteria shall be in accordance with API 1104. The non-pressure retaining reinforcing pad fillet welds (Types 1, 2, 5 and 6.) shall be visually and MPI examined. The testing and acceptance criteria shall be in accordance with API 1104. The longitudinal welds and fillet at the end of full encirclement sleeves (Type 3) shall be examined visually and by MPI and UT after the completion of welding. The testing and acceptance criteria shall be in accordance with API 1104. The ends of the sleeve and bands on the branch pipe will be buttered with a single layer of stringer beads. This welding is performed prior to completing the fillet weld. See Figure 2 for clarification details. When welding on the line pipe, the heat input shall not exceed 1.8 KJ/mm.

   

Hot Tap welding Procedure; Rev. 0 Page 3 of 3 October 5, 2008 D. Niemeyer    

  Figure 1 

         

K + gap 

  Figure 2