How to mark the stainless steel grades and standard numbers for heat exchanger tube boxes
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How should I fill in the stainless steel grade and standard number for heat exchanger tube boxes and tube sheets?
I don’t understand what the original poster means. On the drawings, a drawing number must be assigned to indicate the tube sheet. The standard code for the material of stainless steel tube sheets on the drawings (which cannot be called a drawing number) is NB/T47010-2010 for forgings; whereas for stainless steel tube sheets made from plates, the standard code is GB24511-2009.