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Hot Dipped Galvanized Iron Round Pipe/Galvanized Erw Steel Tubes For Greenhouse Building Construction

range of galvanized round pipegalvanized round pipe Because the pipeline has good comprehensive performance, it is widely used in chemical, construction, water supply, drainage,petroleum, light and heavy industry, refrigeration, sanitation, plumbing, fire protection, electric power, ae

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Product description

Hot-dip galvanized pipe, in order to improve the corrosion resistance of steel pipe, the general steel pipe is galvanized. Galvanized steel pipe is divided into hot dip galvanized and electric galvanized. The layer of hot dip galvanized is thick, the cost of electric galvanized is low, and the surface is not very smooth.

〣Classification of galvanized pipe

Galvanized steel pipe is divided into cold galvanized pipe and hot galvanized pipe. The former has been banned, and the latter is also advocated by the state.

Hot-dip galvanized pipe

Hot dip galvanized pipe is made of molten metal and iron matrix reaction to produce alloy layer, so that the matrix and the coating of the two combination. Hot dip galvanizing is to first pickling the steel pipe. In order to remove the iron oxide on the surface of the steel pipe, after pickling, it is cleaned by ammonium chloride or zinc chloride aqueous solution or mixed aqueous solution of ammonium chloride and zinc chloride, and then sent into the hot dip plating tank. Hot dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. Complex physical and chemical reactions occur between the steel tube substrate and the molten bath to form a compact zinc-iron alloy layer with corrosion resistance. The alloy layer is integrated with the pure zinc layer and the steel tube matrix. Therefore, its corrosion resistance is strong.

1. Uniformity of galvanized layer: steel tube sample shall not turn red (copper plating color) after 5 consecutive impregnations in copper sulfate solution.

2, surface quality: the surface of galvanized steel pipe should be complete galvanized layer, there should be no black spots and bubbles on the plating, allowing a small rough surface and local zinc tumor.

3, galvanized layer weight: according to the requirements of the customer, galvanized steel pipe can be measured zinc layer weight, its average should not be less than 500g/ square meter, including any sample should not be less than 480g/ square meter.

Cold galvanized pipe

Cold galvanized is electric galvanized, galvanized amount is very small, only 10-50g/m2, its own corrosion resistance is much different than hot galvanized pipe. Regular galvanized pipe manufacturers, in order to ensure quality, most do not use galvanizing (cold plating). Only small businesses with obsolete equipment use galvanizing, and of course their prices are relatively cheap. The Ministry of Construction has officially announced the elimination of cold galvanized pipes with backward technology, and it is not allowed to use cold galvanized pipes as water and gas pipes in the future. The zinc layer is an electric coating, and the zinc layer is layered independently with the steel tube substrate. Zinc layer is thin, zinc layer is simply attached to the steel tube matrix, easy to fall off. So its corrosion resistance is poor. It is prohibited to use cold galvanized steel pipes as water supply pipes in newly built houses.

〣Product parameter

Product NameHot Dipped Galvanized Iron Round Pipe/Galvanized Erw Steel Tubes/Tubular Carbon Steel Pipes For Greenhouse Building Construction
MaterialA53 GR.A,BS387
Size1/2"-48" (DN15mm-1200mm)
StandardASTM A53 Gr.A, BS1387
Wall thickness0.8MM-12MM
Surface Treatmentgalvanized, anti-corrosion coated.
Pipe EndsUnder 2 inch plain end. 2 inch and above Beveled. Plastic caps (small OD). Iron protector (large OD).
MarkingStandard marking, or according to your request. Marking Method: Spray white paint
Pipe Length1. Single Random Length and double Random Length.2. SRL:3M-5.8M DRL:10-11.8M or As clients requested length3. fixed length(5.8m, 6m, 12m)

〣Application range of galvanized round pipe

galvanized round pipe Because the pipeline has good comprehensive performance, it is widely used in chemical, construction, water supply, drainage,petroleum, light and heavy industry, refrigeration, sanitation, plumbing, fire protection, electric power, aerospace, shipbuilding and other basic projects.


1.Reasonable price with excellent quality2.Abundant stock and prompt delivery3.Rich supply and export experience, sincere service4.Reliable forwarder, 2-hour away from port.


Loose package; Packaged in bundles(2Ton Max); bundled pipes with two slings at the both end for easy loading and discharging;wooden cases; waterproof woven bag.


Q1: Are you a manufacturer?

A: Yes, we are a manufacturer, we have our own factory.  And we are the China leading galvanized steel coil, galvalume steel coil,PPGI/PPGL etc.  We promise that we are exactly the supplier you have been looking for.  We welcome you to visit our factory to check our production lines and know more about our capacity, quality.

Q2: Do you have quality control system?

A: Yes, we have ISO, BV, SGS certifications and our own quality control laboratory.

Q3: How long is your delivery time?

A: Generally it is 7-14 days if we have the exact goods in our stock.  If not, it will take around 25-35 days to get goods ready for delivery.

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Zhishang Steel Co., Ltd

ABOUT USOverviewThe company mainly deals in color-coated, galvanized, stainless steel pipes, stainless steel coils, stainless steel plates of various materials; hot-rolled series of rebar, medium and heavy plates, coils, I-beams, angle steels, channel steels, H-beams and other steel products and deep processing Service. (The company’s annual invent···

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