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

51 reactions | Before the insulation goes on… this is where real PWHT quality begins  Every thermocouple, every heater, every wire — it all matters at this stage. Once it’s covered, there’s no second chance. Preparation isn’t just a step — it’s the foundation of a successful heat treatment.  Watch this short clip and remember: PWHT quality doesn’t start with heating… it starts with preparation. . . . . . . . #pwhtlife #heattreatment #pwht | Heat Treatment | Facebook