Where are there clear regulations regarding heat treatment after welding a transition layer on equipment flanges?
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Experts, which document specifies this clearly? Is stress-relief heat treatment required after welding a transition layer on the equipment flanges of heat exchangers, or is it based on experience?
Whether stress-relief heat treatment is required after welding a transition layer on the equipment flanges of heat exchangers is generally determined in accordance with the ASME Boiler and Pressure Vessel Code (the code issued by the American Society of Mechanical Engineers for boilers and pressure vessels). For specific details, refer to ASME Section VIII (Pressure Vessels) or ASME Section IX (Welding and Brazing Qualifications). The specific requirements vary depending on the material, welding process, and design specifications; therefore, it is necessary to determine on a case-by-case basis whether heat treatment is required. .