aramco hot tap welding procedure rev. 1
DESCRIPTION
Hot TapTRANSCRIPT
SAUDI ARAMCOWELDING PROCEDURE SPECIFICATIONS
N/ATungsten Electrode Size and Type N/AOrifice or Gas Cup Size
Department Revision Date
NoneApproval restrictions
PREHEAT
N/AShielding Gas (Type)
N/AFlow Rate
POST WELD HEAT TREATMENT
Carbon Steel, to API 5L X60, equivalentgrade
Material Specification(typical)
FILLER METAL
NoneTemperature Range
N/ATime Range
N/AHeating Rate
N/ACooling Rate
Stringer and WeaveString or Weave Bead
Brushing & GrindingInitial & Interpass Cleaning (Brushing, Grinding, etc.)
MultipleMultiple or Single Passes
GAS
POSITION
V-UPWelding Progression
TECHNIQUE & ELECTRICAL CHARACTERISTICS
Hot TapWPS No. 0WPS Revision No.
107 C For all weldingPreheat Temp.
Interpass Temp.
BM Thickness Range:
1 P-No.BASE METAL
TO1, 2 Group1P-No. 1, 2Group
4.8-50.8mmGroove
UnlimitedFillet
50.8mm-UnlimitedGroove
UnlimitedFillet
Pipe Diameter Range:
N/AGas Backing Flow Rate
NoneGas Backing (Type) AllGroove AllFillet
JOINT SKETCH
E7018-1E7018-1E7018-1E7018-1
2.43.23.24.0
A =
B =
C =
D =
SMAWSMAWSMAWSMAW
1111
Application: Piping X Pipeline X Pressure Vessel Tank Structural
SIDE
FillFill1FillFill
PASS PROCESS FILLER METAL SIZE (mm)
Other Dimensions/Comments:
SourNon-Sour
Service YesNo
Impact Toughness Minimum DesignTemperature
YesNo
PWHT SMAWWelding Process
VOLT. AMP.
DCRPDCRPDCRPDCRP
POL.TRAVEL SPEED
(cm/min)
23-2922-2820-2620-25
70-10090-16090-160140-185
Spec. No. (SFA) A5.1
AWS No. (Class.) E7018-1
Size of Filler Metals 2.3, 3.2, 4.0
Max. Deposit Thickness 50.8mm
SAW Electrode-Flux (Class.) N/A
N/AFlux Trade Name
SAMS S/N
TRAVEL SPEED
PQR Revision No. 0
None
N/AMethod of Backgouging N/AContact Tube to Work Distance
Consulting Services Department
PQR No. P1-5
Other
Other
Other
.Other
NoneOther
NoneOther
NoneOther
Hot TapWPS No. 0WPS Revision No. PQR Revision No. 0PQR No. P1-5
1 of 1Page
2 of 2Page
315 C Maximum.
Oct 5, 2008
Hot Tap welding Procedure; Rev. 0 Page 2 of 2 October 5, 2008 D. Niemeyer
1 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.
2 The preheat shown on the welding procedure must be followed for all welding. 3 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.
4 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.
5 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.
6 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.
7 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.
8 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
Figure 2
K + gap