[MW:16449] Preheating regards Tensile strength

 

Dear experts,

Asper ASME31.3 table 330.1.1 preheating should be done for all thickness(79 deg C), if tensile strength of base metal exceeds 490MPA.In my project we have 2"OD  and 5.54 thickness with 510MPA tensile strength(Base metal).

 In this case whether preheating is require or not. Kindly give some suggestions.

Thanks & Regards,

Naresh