STRESS RANGE ASME B.31.3

[DiegoLuca Faraguna]

HI,

I have this problem to share.
I have a line to test, with operating temp uguals -150 / +20, and design temp equals -180 / +200,

in paragraph 319.3.1, ASME, expresses the concept of max metal temp and min metal temp, while in appendix S, uses the operating temp..

witch temp I use for stress range?

-150 + 20
or
-180 +200 ?

in the first case the delta is 170 c in other case is 380 c.

thanks

D

 

[DSB123]

Read the Code ,whichever one it is, as you do not mention. It clearly states what temperature you should use for the stress analysis!!!!

 

[XL83NL]

Review B31.3, read para 301.2 (Design pressure - general) and 301.3 (Design temperature)