Hi,
Not really sure whether your question is regarding general pressure containing parts (vessel,piping, etc.) or just valve (aside from Safety Relief valve).
one ASTM standard generally should be complemented with other ASTM standards.
Charpy test requirement is in accordance with ASTM A370. Best practice is whenever the minimum design temperature is below -20/-29/-50 degree Celcius (some companies refer to different standard) should always be Charpy tested (x,y,z orientation).
This method is to determine whether the mechanical properties of the end product will remain the same (within tolerance) as the one prescribed on its designated ASTM.
The bigger concern with valves made from bar stock can result in a leak path along elongated inclusions. This may not be detected during hydrotest as it takes a while for the inclusions to corrode and permit leakage.
Therefor, ASTM A479 provide supplement A292. In a more detail extend (valve) ASTM A961 (S50.1)had similar supplement which is ASTM E381.
The method is described clearly on A292. Analytical parameters of ditches, micro-pitting examination among (micro)grains are defined there. Among other criteria of course.
I don't encompass NORSOK standard. However the general understanding is that steel manufacturer which complies with NORSOK have endorsed similar measurement method as part of their quality control. Which underlined as most of them would be European steel fabricator and small numbers of Asian's manufacturers. This is the opinion that I commonly interfaced.
Maybe others have different view.
PS: Sample of macro-etch analysis is the same batch as the final product.
Regards,
MR
All valves will last for years, except the ones that were poorly manufactured; are still wrongly operated and or were wrongly selected
I was referring generally to pressure piping. but you have managed to answer my doubts about the use of ASTM A479 alone to order raw material for my product.