Post weld heat treatment (PWHT) is a controlled process in which a material that has been welded is reheated to a temperature below its lower critical transformation temperature, and then it is held at that temperature for a specified amount of time.[1] It is often referred to as being any heat treatment performed after welding; however, within the oil, gas, and petrochemical industries, it has a specific meaning. Industry codes, such as the ASME Pressure Vessel and Piping Codes, often require mandatory performance of PWHT on certain materials to ensure a safe design with optimal mechanical and metallurgical properties.
![](https://qntbd.com/wp-content/uploads/2019/09/PWHT-600x350-150x150.jpg)
Post Weld Heat Treatment (PWHT)
![](https://qntbd.com/wp-content/uploads/2019/09/Post-weld-Heat-Treatment-264x300.png)
Q&T Industrial Inspection Company use Latest worldwide Pioneer Brand Globe Low Voltage Post weld Heat Treatment Technology