26 0 159KB
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