Allowable stresses

Hi. I`ve searched for the cold and hot stress value for Material A53 B in ASME B31.3 and could not find it.

"Specifies the cold stress value. Typically, this is the cold allowable stress for the specific material taken directly from the governing piping code. CAESAR II fills this box automatically after you select the material and piping code."

Could somebody help me find or determine this value for HDPE High density polyethylene?

I now learned that that code does not include HDPE, it is for metals. Does anyone have a recomendation for this type of cases? (working with HDPE)

For HDPE Piping you can use vendor recommended design guidelines.

Warm Regards,