The minimum allowable temperature for SA 516-70N 2

[etsen]

Could anyone tell me the minimum allowable temperature for SA 516-70N and what standards or code I can refer to? Thanks a lot.

 

[nashof]

You should refer to ASME VIII Div.1 UCS-66 to see if impact test is required (Curve D for SA-516 Grade 70 Normalized)
Generally carbon steel is no "adequate" for temperatures below -29ºC (-20ºF), but SA-516 if normalized has good working below that temperature.
For example, if temperature is -48ºC(-55ºF) or less you will need to make impact test for any thickness you have.
For other temparutes it depends of the thicknes. Please, have a look in the code.

Take note that independtly of the material and impact test you have for shell and heads (assuming you are talking about a pressure vessel...) you must considere material used for nozzles and flanges.

 

[JStephen]

It depends on the application as well. The ASME B&PV Code has specifications on when plate may be used at various temperatures, but the various tank standards have differing requirements.

 

[nashof]

JStephen is right. It dependes on the application, I was supposing your question was for a pressure vessel.