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This material has been suggested for a valve body to service at -40F. ASME B16.34 will be used and it does not give pressure ratings below -20 F. Does anyone know the mechanicals at -40F or have any other information on its capabilities and how to rate it at that temperature? Thanks!!

I am designing a rectangular vessel according to App.13(in my case it is actually square). It has a flat integral head with an central round opening greater than 1/2 the shortest span. Reference to UG-39-(c)-(1) requires the head to be designed to App.14. App.14 does not recognize the...

I have Sec II Part D 2004 and do not find Inconel 718 (N07718) nor x750 (N07750) both of which would be SB637. I am interested in bar stock. Is this in the later editions? What I need is allowable stress at 100F and also the max temp. Any help will really be appreciated. Paul

Is anyone willing to share the names of foundries that they know to produce quality valve body castings? WCB, CF8M and A395. USA only please.

In B16.34-2009 there are several Mandatory Appendices that deal with examination of castings, etc. The only reference, in the body of the standard, to these in in paragraph 8 (Special Class Valves). However, the appendicies do not reference this and their titles contain the word, "Mandatory"...

The subject has come up about placing a flange on a valve or fitting wherein the flange has a higher class rating than the valve or fitting body. My position is simply that this is not to be done. However, I thought that I had once seen this published in a standard, but I do not see it in...

I am considering using a disc of SB271 C95400 M02 that will require a shaft perpendicular to the disc. This is a valve application and will be the poppet or internal closure element. ASME Sec II D listed. I can cast the entire part. Alternatively I could consider using a barstock piece to join...

What is the difference in ASTM A395 vs A536 60-45-12? Specifically I am interested in why one over the other (irregardless of the small increase in strength). My interest is in valve or fittings. I know that A395 is very commonly used and elevated temp data is also available, but not so for...

I have compressible flow thru a 2" x 200ft pipeline,air inlet at 25 to 30 psig, outlet 2 psig. In using the complete isothermal equation, with this DP ratio, I believe it is appropriate to use the average specific volume in the equation. (Using Crane TP410 Eq. 1-6) Comments appreciated...