Thursday, December 17, 2020

Re: [MW:31860] PWHT required after Preheat for CS or LTCS

What is the code of construction?
What is the type of service?
Is Lethal Services involved?
Need the above mentioned information.....

Regards,
Jamie Reyes
J.R. Machine Company, Inc.


On Wed, Dec 16, 2020 at 7:47 PM thanh tung Nguyen <tungexp.268@gmail.com> wrote:
Dear Experts,

Hope you all are well.

I have a question is about the weld of the base material of CS (or Low temp. CS) with wall thickness greater than 25mm, Do we still required PWHT if we applied a preheating process before, or PWHT is no longer mandatory?

And which reference can be found?

Thank you & best regards./.

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