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Guarantee quality is important
- Jun 26, 2018 -

1. After the butt-joint of the galvanized steel pipe is not in a straight line and there is a problem that the steel pipe is inclined, it is recommended that the pipe head be cut off after a short period of time before processing.

2. After the butt-joint of the galvanized steel pipe, the phenomenon of loose joint between the two pipes is not strict, resulting in uneven thickness of the weld; and the pipe is elliptical due to its own reasons or transport bumps. It is recommended that the pipe head be cut off after a short period of time. Then processing.

3, after galvanized steel pipe butt joints, the site of the trachoma appears:

4, due to technical reasons caused by welding.

5. The presence of zinc tumors at the mouth of the nozzle causes welding difficulties and problems with trachoma. The zinc tumors are treated with a simple treatment of excessive zinc tumor removal and excessive tubes.

Cold galvanized pipe is electro-galvanized, and the amount of galvanized is very small, only 10-50g/m2. The corrosion resistance of the galvanized pipe is much worse than that of hot galvanized pipe. Regular galvanized pipe manufacturers, in order to ensure quality, mostly do not use electroplating zinc (cold plating). Only those small businesses with small scale and outdated equipment use electro-galvanizing, and of course their prices are relatively cheap. The Ministry of Construction has formally announced that cold galvanized pipes that are outdated in technology are not allowed to use cold galvanized pipes as water and gas pipes. Cold galvanized steel pipe galvanized layer is a plating layer, and the zinc layer and the steel pipe substrate are layered independently. The zinc layer is thin, and the zinc layer is simply attached to the steel pipe substrate and it is easy to fall off. Therefore, its poor corrosion resistance. In new residential buildings, the use of cold galvanized steel pipes as water supply pipes is prohibited.