A set of auto fixing-length system for the production of small diameter welding pipe is designed on basis of application of technology of photoelectric.
以光电技术应用为基础，设计了一套适用于小直径焊管生产的新型自动精确定尺系统。
Welding seam should be numbered according to pipeline medium set, in principle, main pipe prior to branch pipe.
焊缝编号应根据管线介质流向进行编号，原则上应先主管后支管。
The persons of welding and examining, the furnace pipe and the welding material should accorded with the special demands, and the management system should be set up.
对焊接、检验人员及炉管和焊材必须有专门的要求，应建立相应的施焊管理制度。
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