热煨弯管的防腐一直是埋地管道防腐的薄弱环节，直接影响管道的使用寿命。
Anticorrosion of heating bend pipes is a problem all along in buried pipeline construction. It affects directly the service life of the pipeline.
本课题作为中国石油天然气集团公司“X80级管线钢管热煨弯管技术研究”的一部分。
This research topic is an integral part of the "research on the Heat-stewed BendTechnology of X80 Pipe Steel" by CNPC.
在燃气管道设计中对管道转角的处理，可以采用机制弯管、热煨弯头、冷弯弯管、弹性敷设。
The mechanical elbow, hot-bending bend, cold-bending bend and elastic installation can be used to handle pipeline corners in design of gas pipeline.
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