Best Price for Pvc Sanitary Fittings - Galvanized welded pipe – Wenyue

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Best Price for Pvc Sanitary Fittings - Galvanized welded pipe – Wenyue Detail:

Classification of galvanized pipes

Galvanized steel pipe is divided into cold plating pipe and hot plating pipe. The former has been banned and the latter has been advocated by the state for temporary use

Hot dip galvanized pipe

Hot dip galvanized pipe is to make molten metal react with iron matrix to produce alloy layer, so as to combine the matrix and coating. Hot dip galvanizing is to pickle the steel pipe first. In order to remove iron oxide on the surface of the steel pipe, after pickling, it is cleaned in ammonium chloride or zinc chloride aqueous solution or ammonium chloride and zinc chloride mixed aqueous solution tank, and then sent to the hot dip galvanizing tank. Hot dip galvanizing has the advantages of uniform coating, strong adhesion and long service life.

Cold galvanized pipe

Cold galvanizing is electro galvanizing. The amount of galvanizing is very small, only 10-50g / m2. Its corrosion resistance is much different from that of hot-dip galvanized pipe. In order to ensure the quality, most regular galvanized pipe manufacturers do not use electro galvanizing (cold plating). Only those small enterprises with small scale and old equipment use electro galvanizing, of course, their price is relatively cheap. The Ministry of construction has officially eliminated the backward cold galvanized pipe, and it is not allowed to use the cold galvanized pipe as water and gas pipe in the future.

Hot dip galvanized steel pipe: the steel pipe matrix reacts with the molten plating solution to form a corrosion-resistant zinc ferroalloy layer with compact structure. The alloy layer is integrated with the pure zinc layer and the steel pipe matrix. Therefore, it has strong corrosion resistance.

Cold galvanized steel pipe: the zinc layer is an electroplating layer, and the zinc layer is separated from the steel pipe matrix. The zinc layer is thin, and the zinc layer is simply attached to the steel pipe matrix, which is easy to fall off. Therefore, its corrosion resistance is poor. In new houses, it is forbidden to use cold galvanized steel pipes as water supply pipes.

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