In-Service Pipeline Repair and Simulation Testing Method of Emergency Repair and Welding Process of Pipeline

The main welding standards used in in-service pipeline repair and emergency repair at home and abroad are studied in the paper. The major factors influencing the welding quality of in-service pipeline are analyzed and the methods of welding technology simulation testing used in in-service pipeline repair and emergency repair are given. The methods proposed are successfully applied in in-service pipeline repair and emergency repair in Lanzhou-Chengdu-Chongqing Products Pipeline. These methods are considered as an important significant in research of in-service pipeline repair and emergency repair.