Study on Distribution of Heat Treatment Temperature Field of Long distance Oil and Gas Pipeline with High Steel Grade

Abstract In-service welding repair is important to ensure natural gas pipelines’ safe and reliable operation. The temperature distribution in the heat treatment process directly affects pipeline’s bearing capacity local stress distribution. This study studied of a high steel pipeline generated by for long-term transportation oil was experimentally. medium frequency induction heating method applied tube body winding belt on outer wall pipe simulate pre-welding post-welding treatment. At same time, thermocouple used record change each position during whole obtain data. Through numerical analysis fitting, law field established guide control.