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Welding Procedure B69AW

1. The document provides details of a welding procedure for a 6-inch pipe made of carbon steel with a sour water process fluid at Bharat Petroleum Corporation Limited's HCU plant. 2. The welding procedure specifies butt welding using E 7018 electrodes at 250°C for 1 hour, 100% visual inspection, and notes requirements for pre-welding, welding, inspection, pickling, passivation, and painting. 3. A table with bakeout times for carbon steel pipes of various thicknesses at temperatures of 426°C and 320°C is included but marked for deletion from the welding procedure specification after preparation.

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Mastram Hathesh
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128 views2 pages

Welding Procedure B69AW

1. The document provides details of a welding procedure for a 6-inch pipe made of carbon steel with a sour water process fluid at Bharat Petroleum Corporation Limited's HCU plant. 2. The welding procedure specifies butt welding using E 7018 electrodes at 250°C for 1 hour, 100% visual inspection, and notes requirements for pre-welding, welding, inspection, pickling, passivation, and painting. 3. A table with bakeout times for carbon steel pipes of various thicknesses at temperatures of 426°C and 320°C is included but marked for deletion from the welding procedure specification after preparation.

Uploaded by

Mastram Hathesh
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
You are on page 1/ 2

Doc. No.

: F/09/12
Bharat Petroleum Corporation Limited Page No. : Page 1 of 2
Issue No. : 03
ADVISORY SERVICES DEPARTMENT Issue Date : 27.09.2022
Revision No.: 00
Welding Procedure Date of Rev. : 27.09.2022

JOB DETAILS
Plant : HCU Location : 6”-PL-16-79101-B69AW
Job description :
Line size (in.) : 6” Line spec : B69AW
Matl Of Constrn : CS Process fluid : SOUR WATER
Des. press (kg/cm2g): Bake-out (See Note Sr 5) : Not reqd / Required
MOC No. : No. of joints :
Filled by (Name) : Date :
WELDING PROCEDURE
Fit-up type : Butt / Socket / Fillet
Welding consumables
For root run : Welding process :
For subsequent runs : Welding process :
Pre-Welding / Welding Requirement
Bakeout : XXhr at XX°C Post heat : - °C for XX hrs
Preheat : - °C Interpass : - °C
PWHT details (if applicable)
Loading Temp : - °C Heating / cooling rate : -°C/hr
Soaking temp : - °C Soaking time : - hr
Inspection requirements
1. Fit up check : %
2. Root DP : %
3. Final DP : %
4. Visual inspection : 100%
5. Radiography : %
6. Hardness: BHN
7. Pickling & Passivation : See note ??”9”??. Sr no shall be as applicable
8. Pneumatic test : kg/cm2(g) of RF pad
9. Hydrotest : kg/cm2(g)
Painting Scheme
Surface Finish : SA 2 ½ / ST3 / ST2 Color : Eg:. RAL 5015 (Sky blue)
Primer : XX coat of XX @ XXµ DFT/coat with two RAL 1013
Intermediate : XX coat of XX @ XXµ DFT/coat (yellow) bands
Top coat : XX coat of XX @ XXµ DFT/coat Total DFT : XXXµ
Notes
1. Only Inspection qualified welder shall be engaged for the job.
2. Mech Maint. to ensure that MOC and Schedule of pipes issued to fabrication contractor should be as per
piping specification.
3. E 7018 electrodes should be baked at 250°C for atleast 1 hour prior to start of welding.
4. Piping, fittings and consumables to be offered for inspection prior to the start of the fabrication for MOC
check, visual inspection.
5. Bakeout shall be carried out prior to cutting of weld joint. (For Inspector’s reference only – See table on
next page for thickness/service based bakeout cycle selection)
6. Socket weld shall be welded with minimum of 2 run weld.
7. For socket weld expansion gap of 1.5 mm to be provided between the fittings and pipe.
8. Welding grade argon gas having purity minimum 99.995% should be used.
9. Commercially available paste/spray pickling & passivation system shall be used.
10. Paint batch certificate (specifying RAL color code for F-2) & paint containers to be submitted/ offered for
Inspection approval.
Doc. No. : F/09/12
Bharat Petroleum Corporation Limited Page No. : Page 2 of 2
Issue No. : 03
ADVISORY SERVICES DEPARTMENT Issue Date : 27.09.2022
Revision No.: 00
Welding Procedure Date of Rev. : 27.09.2022

DELETE FOLLOWING TABLE AFTER WPS PREPARATION


ONLY FOR INSPECTOR’S REFRENCE

Bakeout Times for Carbon Steel


Thk, mm Time (hrs) @ 426°C Time (hrs) - @ 320°C
6.25 .05 1
12.5 1 2
19 2 3
25 3 6
37.5 7 12
50 13 25

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