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material SS 316L loading 300 degree Celsius Heating rate and cooling rate 150 degree Celsius / hour maximum Holding temp & time - 620 degree Celsius for 1 hour.

Thank you for your answer. But I seen that equipment is wholly fabricated with austanetic stainless still and client/ designer specified for stress relieving for same. Before this i had seen case where claded vessel where base metal need PWHT as per code or service requirements and hence we...

need detailed understanding about when RT1 and RT2 is used in name plate marking. Selection of same. extent of NDT for each one etc...

i had observed that some clients are provide stress relieving for ss 304 and 316 grades. as we know sensitization would take place at that temp and would damage corrosion resistance. so i would like to know about detailed reason for same and by doing stress relieving what kind of benefit we...