In view of the girth welding of ERW welding pipe, some welding procedures are designed.

• 针对ERW焊管的环焊缝焊接,设计了主线路焊接、连头焊、返修焊接工艺,并依据SY/T4103-1995进行了包括无损探伤和破环性力学性能试验等焊接工艺评定实验。