For SA 516-70 material its ultimate tensile Strength is 70000 PSI.

In one of client's specification, we have to do Magnetic Particle Inspection for all temporary attachments on vessel for following condition

(1) For the material having minimum specified tensile strength of 80000 PSI or Greater

So, in that case, shall we have to do the MPI for the SA 516 - 70 material or not? It may be possible that, actual tensile strength of the plate may be 76000 PSI or more.

Thanks

Dear Mac,

The minimum specified UTS means the UTS that is "specified" in the product specification & for your case it is 70 ksi that is specified in the production specification SA-516 of II-A.
I have copied here under an interpretation that stops you to use actual UTS mentioned on your MTC, although the interpretation does not exactly fit to your case yet it shows the intent of the code.

Interpretation: VIII-78-65
Subject: Section VIII, Division 1, Allowable Stress Levels, UG-23
Date Issued: May 12, 1978
File Number: BC-78-174
Related Documents:

Question: Is it mandatory for Section VIII, Division 1 applications to use the allowable stress values required by UG-23 or may actual yield and tensile values be used to establish higher allowable stress levels?

Reply: The allowable stress levels indicated by UG-23 are mandatory and may not be exceeded for Section VIII, Division 1 construction.

_________________
Thanks & Regards,
Nasir
Welding Engineer
DESCON Engineering Limited.
Lahore, Pakistan.
Mobile # 0092-336-4145402