Seamless Pipe with PWHT Designation

A Post Weld Heat Treatment (PWHT) designation for Seamless Pipe? Is that crazy?

It may not be standard procedure, but it isn’t crazy. I like to specify PWHT for seamless pipe materials when the pipe specification service calls for PWHT.

Let’s take a look at a common scenario where calling out Post Weld Heat Treatment (PWHT) designation for Seamless Pipe could have saved a big headache. In the example picture a new circuit was added to an existing circuit with a required PWHT designation due to service requirements. Since the seamless pipe did not have a PWHT designation, the welded pipe added during an expansion did not receive the required post weld heat treatment. The new pipe section that did not receive PWHT quickly experienced in-service issues.

Did you know that Turnaround EPC offers a wider variety of services with the expertise to avoid costly mistakes like this one?