P-number reference 1

[Ryno]

I need to find a reference for P-numbers: specifically I need to learn about P-1, P-2,P-4, P-5A, P-5B, P-8, P91

 

[apiguy]

ASME Section II Part D should provide some insight as to which ASTM/ASME spec number s to deal with and which materials fall into which groups. Then procede to either the ASTM or ASME section mfor the spec. number The APIGUY....