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ASME 2/3 rule to eliminate PRV on heat exchanger?

Thread starter dumbdonn
Start date Mar 28, 2003

Status: Not open for further replies.

Mar 28, 2003

dumbdonn

Chemical

I have a heat exchanger with 1050psi feedwater into the tubes with a 1050MAP rating. The shell is heated with 215psi Steam and has a 700 MAP. Am I required to protect the shell with a Pressure Relief Device as per ASME VIII-div.1 UG-133 (d). Heat exchangers shall be protected with a pressure relief device. I hear some type of ruling is out there for a 2/3 rule that eliminates the PRV for the shell?