| After-sales Service: | Video Technical Support |
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| Warranty: | 10 Years |
| Type: | Welded |
| Technique: | Cold Drawn |
| Material: | Carbon Steel |
| Surface Treatment: | Galvanized |
| Samples: |
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| Customization: |
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Galvanized steel pipes are divided into cold-dip galvanized steel pipes and hot-dip galvanized steel pipes, and cold-dip galvanized steel pipes have been banned, and the latter is also advocated by the state to be used temporarily. In the sixties and seventies, developed countries in the world began to develop new types of pipes, and successively banned galvanized pipes. China's Ministry of Construction and other four ministries and commissions have also issued a document to prohibit galvanized pipes as water supply pipes since 2000, and galvanized pipes are rarely used in cold water pipes in new residential areas, and galvanized pipes are used in hot water pipes in some residential areas. Hot-dip galvanized steel pipes have a wide range of applications in fire protection, power and highways
Hot-dip galvanized pipe
Hot-dip galvanized pipe is to react molten metal with iron matrix to produce 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 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 an aqueous solution mixed with ammonium chloride and zinc chloride, and then sent to the hot-dip plating tank. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. The hot-dip galvanized steel pipe matrix undergoes complex physical and chemical reactions with the molten plating solution to form a corrosion-resistant and compact zinc-iron alloy layer. The alloy layer is integrated with the pure zinc layer and the steel pipe matrix, so it has strong corrosion resistance.
Cold galvanized pipe
Cold galvanized pipe is electro-galvanized, the amount of galvanization is very small, only 10-50g/m2, and its corrosion resistance is much different from that of hot-dip galvanized pipe. In order to ensure the quality, most of the regular galvanized pipe manufacturers do not use electrogalvanizing (cold plating). Only those small enterprises with small scale and outdated equipment use electrogalvanizing, and of course their prices are relatively cheaper. The Ministry of Construction has officially eliminated the cold galvanized pipes with backward technology, and is not allowed to use cold galvanized pipes for water and gas pipes. The galvanized layer of cold galvanized steel pipe is an electroplating layer, and the zinc layer is independently layered with the steel pipe matrix. The zinc layer is thin, and the zinc layer is simply attached to the steel pipe matrix and is easy to fall off. Therefore, its corrosion resistance is poor. In newly built homes, it is forbidden to use cold galvanized steel pipes as water supply pipes.
| Product name | Galvanized pipe/tube | |||
| Standard | ASTM/BS/EN/GB/AISI/DIN | |||
| Length | 3000-12000mm or Customer Request | |||
| Diameter | 1/4"-48" or Customer Request | |||
| Thickness | 0.3-40mm or Customer Request | |||
| Application | Hot dip galvanized steel pipe is widely used in construction, machinery, coal mine, chemical industry, electric power, railway vehicles, automobile industry, highway, bridge, container, sports facilities, agricultural machinery, petroleum machinery,prospecting machinery, greenhouse construction and other manufacturing industries. | |||
| Certification | SGS,ISO,ROHS | |||
| Tolerance | ±0.1mm% | |||
| Advantage | 1. high quality surface, clean finished 2. corrosion & oxidation resistance, more durable 3. high ductility and good toughness 4.high strength and to deform5. the use to diversity |
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| MOQ | 1 Ton | |||
| Packing | Standard sea package or as customer required | |||
| Port | Tianjin Qingdao Port | |||
Q1: What is your MOQ?
A: Usually our MOQ is one container, but it is different for some items, please contact us for details.
Q2:What is your terms of payment?
A:We usually accept T/T in advance, L/C for large sum.If you prefer other payments terms, please discuss.
Q3:What is your delivery time?
A:For products in stock, we can ship it within 7 days after receiving the deposit. For custom order, production time is 15-30 workdays after received the deposit.
Q4:How could you guarantee your products?
A:Mill Test Certification is supplied with shipment, We also accept and support the third-party inspection.We also could issue the warranty to customer to guarantee the quality.
Q5: Will all costs be clear?
A:Our quotation is easy to understand and will not incur any additional costs.
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