POST WELD HEAT TREATMENT SERVICES
The technicians of EXEL TECH are well experienced in performing heat treatment on weld joints, piping, regenerator, stripper column, pressure vessel, boiler headers modules pipeline and structure, boiler heater tube.
Post weld treatment service (PWHT) is performed after welding/Machining to improve the Chemical mechanical properties of weldment/machined surfaces. In concept, PWHT covers many different potential treatments. However, in steel fabrication, most common procedure used is Stress Relieving.
Machining /Welding induce stresses in parts. The bigger and more complex the part, the more stresses. Stress relieving is done by uniformly heating-fabricated equipment, piping vessel part to a sufficiently high temperature, but below the lower transformation temperature range, and then subjecting it to a thermal retardation for a sufficient time depending upon the material thickness and then finally uniformly cooling it which is also of upmost importance.
Heat treatment service from ExcelTech include pre-heating, post-heating, stress relieving (SR), intermediate SR, normalizing, drying of refractory material. The experienced technicians of Exceltech is capable of performing heat treatment on weld joints, piping, regenerator, stripper column, pressure vessel, boiler headers modules pipeline and structure, boiler heater tube.