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@david339933, it strikes me as inefficient to specify impact tested materials for a B16.11 plug for use down to -20°F. However, I don't have a better solution.

What is the appropriate/accepted means of determining the permitted MDMT of a B16.11 plug used in a VIII-1 design?

@TGS4: why is a repad unadvisable in this (loosely defined) scenario? Is the differential thermal stress/strain the primary concern? thanks, DK

There are some restrictions for SA-36. Do you meet all the conditions of UCS-6(b)?

All: How economically feasible is it to get a small run of forgings made for these kind of flanges? Would you need custom forging dies? I assume you can't start with a block of forged A182 and just machine away until you're left with a WN? OP: A design pressure four times higher than operating...

Can ASTM A53 or A106 pipe be used in accordance with CSA s16? CSA S16 calls out for structural material to be either CSA G40.20/21 or ASTM A992. I find it hard to believe that ASTM pipe isn't used regularly for stanchion and similar applications in the oil & gas industry. Any ideas? Am I off...

Start here: http://www.absa.ca/design-registration/boilers-pressure-vessels/new-design/ Be careful if you plan on using Part 5: http://www.absa.ca/wp-content/uploads/2017/07/IB17-012.pdf The manufacture will need the appropriate ASME U-stamp. I'd suggest you formulate a plan an contact ABSA to...

metengr: full disclosure, I don't deal with NBIC, but I am curious about your opinion. Based on my quick review of NBIC Part 3 Section 4, is it correct to say that a pressure test (hydrotest) of a VIII-1 vessel (that's been through a repair or alteration) is required unless the local pressure...

While we're at it, what's the original code of construction?

metengr: isn't a hydrotest standard for repairs and alterations? Volumetric examination of the welds wouldn't exempt you from a hydrotest of a new equipment, correct? Why would a volumetric examination be enough for a repair?

TGS4, I assume your post on this topic is still valid: https://becht.com/blog/performing-an-fea-in-section-viii-division-1-to-qualify-an-article-u-2-g-component and you recommend meeting all the requirements of Part 5.

When using Section VIII-2 Part 5 elastic-plastic analysis (with a load factor of b=3.5 for protection against plastic collapse; and 1.7 for protection against local failure) on a vessel (or component of a vessel) that is designed per VIII-1 (and U-2(g)), is it a generally accepted engineering...

What is the code of construction you're working with? Per ASME Section VIII-1 paragraph U-1(e)(1)(-a): (e) In relation to the geometry of pressure-containing parts, the scope of this Division shall include the following: (1) where external piping; other pressure vessels including heat...

TGS4, is submitting a request for an interpretation the prefered method for asking this sort of question; or is there a better way?

Resurrecting an old question from thread292-256296, has ASME provided a definition of equivalent plastic strain?

@stan000, CRNs expire after 10 years. To renew the CRN, you'll need to demonstrate the design meets current codes and standards.

croby84, does this happen to various vessels from various manufactures at various plants? If that's the case, is it possible that your evaluation is flawed somehow? It seems unlikely that you'd come across different designers all cutting things so close.

I'm curious about the theory behind the impact testing exemptions permitted in VIII-1. Specifically: 1. Why are thin plates exempt to lower temperatures than thick plates? 2. Why is the effective thickness of plate stress in bending one-quarter of the actual thickness when determining the...

pradipgoswami, why did you specifically mention 304L and 316L and not for example 304, 316, 304H, or 316H?

jor1492, be aware your weld symbol indicates you expect a fillet weld on the inside of the shaft. You probably want to put the symbol on the side-view.