Piping Material Grade Query

[Anirudh_96]

Hello, I'm designing a pipeline connecting to a 28" pig trap via a 28" x 20" Reducing tee via a Weldneck Flange and a spool of 20" pipe. Pressure class of the piping is 600#. We've received a Piping Material Specification from our client that specifies the materials as :

Pipe - API 5L Gr. X65 PSL2, SMYS - 65000 psi
Flange - ASTM A105N (600#, WNRF) , SMYS - 36000 psi
Tee - ASTM A860 Gr. WPHY, SMYS - 65000 psi

Thickness of all three items is 1/2".

I'm still fairly new to materials but I'm concerned if these materials can be used together given the large difference in yield strength. I'd also like to know if there are any concerns on welding as well.


Thanks in advance!

 

[akpipelineengr]

What is the design code?

Assuming design pressure is 1480 psig, 0.500" wall thickness is thin in the low yield flange material, but how thin will depend on your design code.

 

[LittleInch]

Your flange needs to be A694 F65.
Your won't find it in B16.5 so you need to use MSS SP- 44 for the pipeline flange.

And you need a barred tee.

A 28 " pipeline eh? Can't say I've even seen that size used.

 

[Anirudh_96]

What is the design code?

Assuming design pressure is 1480 psig, 0.500" wall thickness is thin in the low yield flange material, but how thin will depend on your design code.

Design code is ASME B31.4 and yes the wall thickness is another thing I'm worried about.

 

[Anirudh_96]

Your flange needs to be A694 F65.
Your won't find it in B16.5 so you need to use MSS SP- 44 for the pipeline flange.

And you need a barred tee.

A 28 " pipeline eh? Can't say I've even seen that size used.

Yep, that's exactly what I generally use but I've got a client PMS that says I need to use a A105N flange.

FYI, The pipeline's 20", but the Pig trap major barrel its connecting to is 28", hence the 28" x 20" barred tee. I forgot to mention that in my original query.