Li Jian

Hunan Shengshida Steel Group, one of the top 100 private-owned manufacturers of customized steel,
Main business:
Pipes: frame pipes, straight seam pipes, seamless pipes, spiral pipes, welded pipes, galvanized pipes
Plate: Pattern steel plate, open flat plate, hot-rolled coil plate
Profiles: angle steel, channel steel, I-beam, section steel, galvanized channel steel, galvanized angle steel, pipe frame fasteners, pipe accessories, track steel
All resources are in stock and can be picked up directly from steel plants and from the warehouse of Hunan Steel Market. We are the most professional in steel distribution. Welcome friends to come and order goods. Consulting hotline/WeChat:
Galvanized pipe definition:
In order to improve the corrosion resistance of steel pipes, steel pipes are generally galvanized, and galvanized steel pipes are galvanized pipes. Galvanized steel pipes are divided into two types: hot-dip galvanizing and electro-galvanizing. Hot-dip galvanizing has a thick zinc layer, while electro-galvanizing has low cost and the surface is not very smooth.
Galvanized pipe process:
Hot-dip galvanized pipe reacts molten metal with the iron matrix to produce an alloy layer, thereby combining the matrix and the coating. Hot-dip galvanizing is to pickle the steel pipe first. In order to remove the iron oxide on the surface of the steel pipe, after pickling, it is cleaned in an aqueous solution of ammonium chloride or zinc chloride or a mixed aqueous solution of ammonium chloride and zinc chloride, and then sent to in a hot dip plating tank. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion, and long service life. The steel pipe matrix undergoes complex physical and chemical reactions with the molten plating bath to form a corrosion-resistant zinc-iron alloy layer with a tight structure. The alloy layer is integrated with the pure zinc layer and the steel pipe matrix. Therefore, it has strong corrosion resistance.
Cold galvanizing is electro-galvanizing. The amount of galvanizing is very small, only -/. Its corrosion resistance is much worse than that of hot-dip galvanized pipes. Regular galvanized pipe manufacturers, in order to ensure quality, most do not use electro-galvanizing (cold plating). Only small businesses with small scale and old equipment use electro-galvanizing, and of course their prices are relatively cheaper. At present, the Ministry of Construction has officially issued a notice to eliminate cold-galvanized pipes with backward technology. In the future, cold-galvanized pipes are not allowed to be used as water and gas pipes. The zinc layer is an electroplated layer, and the zinc layer is independently layered with the steel pipe matrix. The zinc layer is thin, and the zinc layer simply adheres to the steel pipe matrix and falls off easily. Therefore, its corrosion resistance is poor. In new residential buildings, it is prohibited to use cold-dip galvanized steel pipes as water supply pipes.
Galvanized pipe standard:
Nominal wall thickness. . . . .
Coefficient. . . . ..
Note that the mechanical properties of steel are to ensure the final use performance of the steel (mechanical performance), which depends on the chemical composition of the steel and the heat treatment system. In steel pipe standards, tensile properties (tensile strength, yield strength or yield point, elongation), hardness and toughness indicators are specified according to different usage requirements, as well as high and low temperature properties required by users. Grade of galvanized pipe steel:
Test pressure value/:.3 is 3. is
Usage of galvanized pipe:
The iron pipes used for gas, greenhouse, and heating are also galvanized. Galvanized pipes are used as water pipes. A large amount of rust is generated in the pipes. The yellow water flowing out not only pollutes the sanitary ware, but is also mixed with bacteria that breed on the rough inner wall. The rust causes excessive heavy metal content in the water, seriously endangering human health. In the 1960s and 1970s, developed countries in the world began to develop new pipes and gradually banned galvanized pipes. China's Ministry of Construction and four other ministries and commissions have also issued documents clarifying that galvanized pipes will be banned from two years ago. Currently, galvanized pipes are rarely used in cold water pipes in newly built communities, and hot water pipes in some communities use galvanized pipes.
Calculation formula for the meter weight of galvanized pipe (outer diameter-wall thickness)*wall thickness*.*