@dnaindustrial Post Weld Heat Treatment: a process that takes place to welds usually 1.5” or greater in thickness and bring the material temperature up to 1,250 degrees Fahrenheit. These methods attached •Combustion (Asme Sec IX) •Induction (B31.3) Are designed to relieve the stress that could be in the material after welding due to amount of Heat Input used in welding Pressure Vessels and Pressure Piping #subarcwelding #flux #charpy #combustion #induction #pwht #vessels #welding #gmaw #fcaw #sa

PWHT, or Post-Weld Heat Treatment, is a process for piping that involves heating a welded joint to a specific temperature for a set time and then cooling it slowly. Its main purpose is to relieve the internal stresses and microstructure changes caused by welding, which helps prevent cracking and improves the material's toughness, strength, and ductility. The pipe being pwht is as per line class regardless of thickness, it is being designated in the drawing. PWHT - YES #constructionlife #construc