aramco hot tap welding procedure rev. 1

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