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4, the use of automatic welding technique
I boiler during the welding process, the use of automatic welding techniques, such as using a longitudinal girth submerged arc welding, smoke pipe tube sheet using automatic welding, compared to manual welding, reduces the error rate, and can not do a lot of artificial a welding technique.
5, using the first welding smoke tube expansion (elimination of the welding gap), welding, then expanding (eliminate the welding) process; sure.
Hejian former cheap dealer price water heater boiler for shower installer Gas steam boiler Gas steam plant, should fill out the "boiler installation started this book", and was carrying at least pot seized by the following material to the gas steam boiler unit territories do boiler formalities license to install, only by consent start: ① gas-steam device license copies boiler; ② gas steam boiler plant boiler installation started this book and installation construction plans; ③ gas steam boiler certificate material; ④ boiler room plane CAD drawings and boiler room planning material; ⑤ device companies to participate in construction practitioners certified personnel. Former gas steam boiler device, and the device should also have agreed to carry the "boiler installation started this book" to use the unit earthly quality inspection departments Gas steam boiler pressure test equipment unit signed "quality boiler installation undertaking" for the inspection unit Numerical gas steam boiler means of supervision and inspection requirements.