Thank you metengr.
I'm glad to know that I'm not going crazy. I'll add this to the list of "questionable" spec items that my client has requested.
Thank you again.
A client of mine has specified Class 900 carbon steel flanges per ASTM A105 Grade 2. Does anyone know the composition and material characteristics of "Grade 2". I do not see any reference to Grade 2 in the latest (2010) version of ASTM A105 standard.
As a side note, while searching the...
Simple questions but I can’t find explicit answers anywhere.
1. What does the “P” in ASTM A335 Grade P91 material stand for?
Does “P” mean “Pipe” or “Part” or something like that?
Is there a reference regarding this?
2. What does the “WP” in ASTM A234 Grade WP91 material stand for?
Does...
Never mind. I finally found the distinction in a piping reference "The Piping Guide" by David R. Sherwood and Dennis J. Whistance.
Apparently HALF-COUPLINGS are used for 90 deg branch connections into larger pipe or vessel walls. It is stonger than a Full-Coupling. However, since the...
What, if any, differences are there between socket-welded forged steel HALF COUPLINGS (per ASME B16.11) compared to socket-welded forged steel REDUCING INSERTS (per MSS SP-79)?
Yes, this is issue is exactly about enlarging the bolt holes. However, no where in the code can I find information about the impact to the flange based on hole size. As a matter of fact, the code does not directly address hole size but rather you get a hole size AFTER you've calculated the...
Do you know of a more convenient/practical method(s)to verify that a NPS 24 Class 600 slip-on reducing flange (material ASTM A182; 1 1/4 Cr- 1 1/2 Mo) complies with the requirements of ASME B31.3 sections 304.7.2 (Unlisted Components). - Thank you in advance -
