Mechanical strength of pipe coating and its thickness of standard paintcoat must be ensured in the pipe coating production lines,two pipes in the course of coating must be flexibly jointed.

管涂敷生产线证管件涂敷层的机械强及标准涂层的厚,两根管子在涂敷过程证柔性顶接,连接处不能有缝隙。