China factory hollow tube section price

Galvanized steel pipes are widely used in manufacturing industries such as construction, machinery, coal mines, chemicals, electric power, railway vehicles, automobile industry, highways, bridges, containers, sports facilities, agricultural machinery, petroleum machinery, exploration machinery, and greenhouse construction. Galvanized steel pipe is a welded steel pipe coated with a hot-dip galvanized layer or an electro-galvanized layer. Galvanizing can increase the corrosion resistance of steel pipes and prolong their service life. Galvanized pipes are widely used. In addition to being used as pipelines for general low-pressure fluids such as water, gas, and oil, it is also used as oil well pipes and oil pipelines in the petroleum industry, especially in offshore oil fields, oil heaters, condensate coolers, and chemical coking equipment. Coal distillation oil washing heat exchangers, trestle pipe piles, mine tunnel support pipes, etc.
The hot-dip galvanized pipe is to make the molten metal react with the iron matrix to form an alloy layer, so that the matrix and the coating are combined. 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 should be washed in ammonium chloride or zinc chloride aqueous solution in the 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. The hot-dip galvanized steel pipe substrate undergoes complex physical and chemical reactions with the plating solution to form a dense corrosion-resistant zinc-iron alloy layer. The alloy layer is integrated with the pure zinc layer and the steel pipe substrate, which has strong corrosion resistance.
1. The mouth of the galvanized steel pipe is not in a straight line after butt joint, and there is a problem with the oblique mouth of the steel pipe. It is recommended to cut off a small section of the steel pipe head before processing.
2. After the nozzles of the galvanized steel pipe are butted, the two nozzles are not connected tightly, resulting in uneven thickness of the welding joint; and the nozzle ellipse caused by the steel pipe itself or transportation collision, it is recommended to cut off a small section of the steel pipe head before processing.
3. After the nozzle of the galvanized steel pipe is docked, sand holes appear at the nozzle:
4. Due to technical reasons during welding.
5. There is a zinc tumor at the nozzle, which causes welding difficulties and trachoma. Excessively large and excessive pipes should be simply cleaned of zinc nodules.