双金属复合管焊接工艺研究与应用

Study on welding technology of double metal composite pipe

为了提高20#碳钢基管+316L不锈钢内衬管双金属复合管的焊接一次合格率以及生产效率,研究了该材质的焊接工艺参数,并采用该参数进行焊接工艺试验,评定合格后进行了工程应用。结果表明,该工艺焊接工序步骤简单,焊接一次合格率由不到70%提高至90%以上,提高了工程焊接效率,确保了工程顺利投产。

In order to improve welding qualified rate and working efficiency of double metal composite pipe with 20#Carbon steel base tube and 316Lstainless steel inner liner,the paper introduces the study on the welding process parameters,welding procedure qualification which is applied on project after approved.The result of appliction proves that the welding procedure is simple and effective,which welding qualified rate is improved from 70% before to over 90% and ensures the smooth commissioning of the project.