how do we ensure impact test requirement

[abdulsayeed7]

Referring from ASME B31.3 ; I believe, impact test requirement requirement is decided from Minimum Design Metal Temperature (Fig. 323.2.2B)can you all help how will I find this stress ratio value and find out how will I decide whether impact test is required to perform or not; if procedure is wrong please explain how will I decide the requirement of impact testing, pls exolain in detail.
thank you

 

[loilfan]

Find your materials in Table A-1, you are exempt from impact testing if your MDMT is warmer than the Min Temp listed unless the material spec requires it. If not, you must impact test. Read Note 6 in Table A-1.

If the Min Temp listed is a letter (A, B, C, D), go to Para 323.2.2b and Fig 323.2.2a. The way to determine your stress ratio is in the general notes of Fig 323.2.2b.

 

[weldstan]

The design engineer or Owner determines the MDMT. Then see loilfan.

 

[abdulsayeed7]

thank you so much @loilfan and @ weldstan; will check according to your suggestion.