Dear Friends,
when MDMT -46C, & I selected SA 516GR70 & Impact test.after run, MDMT -48C & ok for aii thickness (70mm), but in Standard ASME, SA-20 in table A.1.15 for SA516 GR70, with impact test, Alowable MDMT -50F with 1in Thickness.

There is discrepancy between software & Standard.
Please guide me
Thanks

Hello Ferdowsi

I think you are referring to ASME Section II - Part A when you make reference to table A.1-15. This section of the ASME BPV code is a general code that is used for all the other sections such as ASME Section VIII, Division 1, Division 2, ASME Section I, ASME Section III etc. To determine the MDMT requirements you have to refer to the specific code you are using, which in your case is ASME Section VIII, Division 1. The general impact statement made in Section II - Part A cannot over ride the specific code requirements. You are governed by section UCS-66 of ASME Section VIII, Division 1.

I hope this answers your question.

Dear Ray,
thanks alot for answer.
in design of pressure vessels, I notice to UCS 66,
then, -48C in pv-elite with impact test & alll the thickness(80mm) is correct?

regards
Homa

Dear ray
I have a question about hydrotest
I write this table.
can U answer me?
Thanks