First of all, the welding of galvanized pipe in Ji'nan should have stable parameters, flexible adjustment, meet the technological requirements and safe and reliable performance of galvanized pipe. The welder is very important. It is necessary to pass the examination and obtain the qualification certificate for the galvanized pipe welding of the steel structure engineering, and the qualification of the welding condition and the expiration date should also be indicated in the certificate. And the welding and welding nails should be cleaned up before the use of oil and rust. Before welding, the welder should check the quality of the joint and the treatment of the welding area. If it does not meet the requirements, it should be welded after finishing.
1, common cold galvanized pipe, galvanized layer is relatively thin, in this case the general use of ordinary electric welding or gas shielded welding, before welding the galvanized coating on the surface of galvanized pipe to do after grinding.
2, Ji'nan galvanized pipe is not easy to wear but need to be welded with galvanized layer, it is necessary to use gas protection and 50-6 welding wire, but in this case zinc loss is more serious.
3, hot dip galvanizing, if the zinc coating is thick, argon arc welding of WE53 electrode will be used.
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