John, gr2vessels, metengr:
Thanks for taking the time to read and respond to my inquiry.
metengr, I agree with all your comments. Some confirmed my conclusions, and some were an additional help. This exercise has been quite frustrating to get this piping specification in compliance to B31.3...
B31.3 Piping Code
High strength materials for 4550 psig at 200 °F
10" nominal pipe diameter
We have a high pressure CO2 liquid injection line per the above. The recommended materials are API 5L X65 for pipe; MSS SP75 WPHY 65 for butt weld fittings; and A694 F65 for forgings (flanges and socket...
Mr. Breen:
Unless I am misunderstanding paragraph 302.2.2, I believe I need to compare the allowable stresses for the pipe with the allowable stresses for the fitting material to comply with the referenced paragraph. If the fitting allowable stress is equal to or greater than the pipe...
Mr. Breen:
Thanks for taking the time to reply. I am also familiar with your postings on the Caesar 2 discussion boards.
Assuming your reference is to the 'W' term, I am familiar with its use. This material application is not for high temperature, but for its corrosion resistance to the...
Piping Code: B31.3
Material: Incoloy 625
Fittings: B-366 UNS N06625
I am writing a piping specification for Incoloy 625 and am specifying the pipe wall thickness. There are allowable stresses for pipe B-444 UNS N06625 and forgings B-564 UNS N06625 (4" and smaller). I have not found any...
In general, are there guidelines for block valve sizing on the outlet of control valve stations? Specifically we have a desuperheating control valve station to take superheat out of a low pressure propane recycle line feeding a refrigeration compressor. The inlet to the control valve station...
metengr:
Thank you for taking the time to research and respond to this item. I appreciate the confirmation and will pass this on to the interested parties in our oganization and to the fabricator as well. I thought this was the correct interpretation, but with most codes there is always the...
metengr:
Thanks for the response. Have I misinterpreted the requirements for a welded (EFW) fitting per Table 323.2.2, A-4 (b) pertaining to the weld metal and HAZ? Also paragraph 323.2.2 (f) (1) and (2)?
One of the reasons for this question, is that a vessel fabricator has been agonizing...
Piping Code B31.3.
Material for butt weld fittings ASTM A-403 Gr WP 304.
Impact Testing Requirement at -325 °F Design Temp.
From reviewing the piping code for this material, it appears that for EFW fittings, the base metal will be exempt from impact test requirements. However, the welds for an...
