We’ll Handle The Heat so You Don’t Have to!
PWHT stands for Post Weld Heat Treatment.
It is a process applied to welded materials after the completion of the welding operation. PWHT is used to relieve internal stresses, improve material properties, and reduce the risk of cracking. The process involves heating the welded component to a specified temperature, holding it at that temperature for a certain duration, and then cooling it at a controlled rate. The temperature range for PWHT typically lies between 1100°F and 1375°F), depending on material type. Process performed using localized heating “resistance heating”
· PWHT is commonly used for high-strength materials, pressure vessels, pipes, and components in the oil and gas, nuclear, and power generation industries
Primary goals of PWHT:
· Reduce residual stresses from welding.
· Reduce hardness in the heat-affected zone (HAZ).
· Improve ductility and toughness.
· Prevent or reduce the risk of hydrogen-induced cracking.
· Enhance the uniformity of microstructure.
