The exemptions vary amongst codes, though, therefore it would be preferable to bring some of these various criteria together. Some structures (such as those with modest thickness, according to current fabrication regulations) are exempt from PWHT. The fracture toughness at the minimum service temperature, the stress levels, and the magnitude of any potential faults will determine whether PWHT is required. There is a financial incentive to avoid PWHT wherever possible because it can be a costly procedure, especially for large steel assemblies. This decreases the chance of brittle fracture. Steel assemblies undergo post-weld heat treatment (PWHT) to temper hard, potentially brittle microstructural areas and lower the degree of tensile welding residual stresses. Get A Quote For Your Desired Products Get A Quote For Your Desired Products
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