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All, Do we have to put P number when we prepare and qualify a WPS for an EN standard material to ASME IX? For example EN 10025 S235JR. Thanks.

Dear all, I also have questions regaridng a jacketed vessel. Do UG 99(e)(2) and or UG (f) apply to a jacketed vessel, which it has full vacuum (15 psig design pressure) for interior shell design? The jacket covers the whole interior vessel except one end - the flat cover. My customer...

Dear all, Per ASME IX, "A WPS may require the support of more than one PQR, while alternatively, one PQR may support a number of WPSs." I could understand "a WPS may require more than one PQR" as due to thickness range. Could anyone provide samples of "one PQR may support a number of WPSs"...

Sorry, made a mistake. Let me start again. SA213-304 and A511-304 have the same UNS # - S30400. Could they replace each other for the media acrylic? Thank you in advance.

Does the vacuum situation have to be considered during designing a steam pressure vessel, which the vessel will be calculated with external pressure? If the answer is yes, how to verify the stength of non-circular cross section subject to vacuum pressure? Thank you!

Dear everyone, I could not find the allowable stress in ASME Sec II Part D for SA-516 70N. Does that mean that their stresses are the same? Thank you.