1. The steel pipe fittings formed by cold working are subjected to heat treatment for stress relief after forming.
2. For steel pipe fittings formed by thermal processing, heat treatment should be carried out for chrome-molybdenum steel and stainless steel materials; for carbon steel materials, heat treatment should be carried out when the final forming temperature is lower than 750°C.
3. For austenitic stainless steel pipe fittings, pickling and passivation treatment should be carried out after heat treatment.
Post time: Jul-27-2023