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Dear Mike, jamesl, thanks for your support. I am investigationg through and asked to our AI and our qualified bolting suppliers. It seems that, from the calculation and stamping point of view, the note A of SA 320 L7M bolting (table 1 - Mechanical requirements) gives reasons to allow it...

Thanks Mike. I did not know double posting was nota good behaviour. thanks for let me know.

Hi all, I wonder if someone could share with me if had experience with L7M (grade M) bolting over 2.1/2" in size with ASME VIII Div.1 code and stamped heat exchangers The ASME II Part. D limits the allowable stresses to 2.1/2" although the ASME II Part.A for the SA 320 L7M bolting (table 1 -...

Hi all, I wonder if someone could share with me if had experience with L7M (grade M) bolting over 2.1/2" in size with ASME VIII Div.1 code and stamped heat exchangers The ASME II Part. D limits the allowable stresses to 2.1/2" although the ASME II Part.A for the SA 320 L7M bolting (table 1 -...