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What is PWHT Procedure and Chart Guidelines about?
This document outlines the procedures for post weld heat treatment (PWHT) of pipe materials P4 and P5A according to ASME B31.3, B31.1, and Section 1 standards. It specifies heating and holding temperatures and rates, as well as minimum thermocouple requirements for local PWHT based on pipe size. PWHT must be logged and non-destructive testing may be required after based on the job and material.
- Author
- alireza ghoreyshi
- Language
- EN