API 1104 vs. ASME Section 9 1

[exCLP]

On a crude oil pipeline station, when does API 1104 apply and when does ASME Section 9? On Welding Procedures, I am hearing two versions:
1) API 1104, till after the first above-gound flange, then ASME Section 9; versus,
2) API 1104 throughout ..."a pipeline is a pipeline"

 

[BigInch]

#2 A pipeline is a "Pipeline".

Look to the "Scope" section of ASME B31.4 & .8 to see where a pipeline starts and stops. You will see that "Pipelines" also include pump and compressor stations. Wether a flange is above or below ground makes no difference

http://virtualpipeline.spaces.msn.com

 

[GregLamberson]

exCLP:

BigInch is correct, for entry to gas plant/production facility, typically the spec break will be at the flange of the side valve on the pig trap.

Greg Lamberson, BS, MBA
Consultant - Upstream Energy
Website:

http://www.oil-gas-consulting.com

 

[justinwest]

API 1104 throughout.
Drawings should dictate where the spec change should be made.
you should not start to worry about section IX until you reach a processing facility or some form of packaged equipment piping.

 

[justinwest]

you can disregard the statement about the drawing.
it occured to me that you might be creating the drawing.
sorry, i'm on the construction end of the oilfield, so i'm used to drawings being completed long before i get involved

 

[dcasto]

I always make a spec-break at the pipeline overpressure protection device to insure I'm in compliance with 31.8 on the line and keep DOT out of my hair in the plant. Since I never put a relief valve on my pipelines, its the ESD/MOV just upstream of the pig trap. Mark your drawings so everyone is clear on the break point as mentioned aboev.

 

[BigInch]

I go with the side valve to the trap as does GregL, but each to his own. The location of the spec break is a matter of the specification's scope limitations, or company policy if the spec's limit is ambiguous when applied to the exact facilities being separated.

http://virtualpipeline.spaces.msn.com

 

[GregLamberson]

Yeah and the main reason is because pipeliners are good at laying pipe, and use 1104 welders. Pipeline contractors are notoriously bad at fabrication and are usually stretched just fabricating MLV's and pig traps, I don't dare want to have them try their hands at plant (B31.1 or 31.3) piping - look out.

Greg Lamberson, BS, MBA
Consultant - Upstream Energy
Website:

http://www.oil-gas-consulting.com

 

[justinwest]

GregL,
beautifully stated!!

 

[stanweld]

In terms of Welding Procedure Qualification and Welder Qualification, 49CFR Part 195.214 and 195.222 permit qualification by either ASME Section IX or API 1104. Weld acceptance criteria must be per API 1104 per 195.228.

State jurisdictions may impose further restrictions and may limit qualification to API 1104 only. For gas piping, Arizona mandates qualification per API 1104 both outside and inside of the plant; in power plants, B31.1 does not apply to the fuel gas lines.