Pwht Technician Interview Questions and Answers

PWHT is needed after welding to relieve residual stresses and improve the mechanical properties of the welded joint.

• PWHT helps to reduce residual stresses that are generated during welding.

• It improves the mechanical properties of the welded joint, such as toughness and ductility.

• PWHT can prevent cracking and distortion in the welded structure.

• It helps to achieve the desired microstructure and hardness in the heat-affected zone.

• PWHT is commonly used in industries like oil and ...read more

PWHT methods include resistance heating, induction heating, and flame heating.

• Resistance heating involves passing an electric current through the material to be heated.

• Induction heating uses electromagnetic induction to heat the material.

• Flame heating utilizes a flame or burner to heat the material.

• Other methods may include radiant heating or furnace heating.