| Customization: | Available |
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| After-sales Service: | Video Technical Support |
| Warranty: | 10 Years |
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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 Only those small enterprises with small scale and outdated equipment use electrogalvanizing, and of course their prices are relatively cheaper.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 | |||
Carbon steel pipe: It is made of 10, 20, 30, 35, 45 high-quality carbon steel, 16Mn, 5MnV and other low-alloy structural steel or 40Cr, 30CrMnSi, 45Mn2, 40MnB and other alloy steels hot-rolled or cold-rolled. Seamless pipes made of 10, 20 and other low-carbon steels are mainly used for fluid delivery pipelines. Seamless pipes made of 45, 40Cr and other medium-carbon steels are used to manufacture mechanical parts, such as stress-bearing parts of automobiles and tractors. Generally, carbon steel pipes must ensure strength and flattening tests. Hot-rolled steel pipes are delivered in hot-rolled or heat-treated states; cold-rolled steel pipes are delivered in heat-treated states.
Square tube is a name for square tube and rectangular tube, that is, steel tube with equal and unequal side lengths. It is made by rolling steel strips through processing. Generally, the steel strips are unpacked, flattened, curled, and welded to form round tubes, which are then rolled into square tubes and cut into required lengths.
Seamless Steel Pipe the wall thickness of the product, the more economical and practical it is. The thinner the wall thickness, the higher the processing cost. Secondly, the process of the product determines its limited performance. Generally, seamless steel pipes have low precision: uneven wall thickness, low brightness of the inner and outer surfaces of the pipe, high cost of cutting, and pitting and black spots on the inner and outer surfaces are difficult to remove. Thirdly, its detection and shaping must be processed offline. Therefore, it has demonstrated its superiority in high pressure, high strength, and mechanical structure materials.
Spiral pipes are mainly used in water supply projects, petrochemical industry, chemical industry, electric power industry, agricultural irrigation, and urban construction. They are one of the 20 key products developed in China. For liquid transportation: water supply, drainage, sewage treatment projects, mud transportation, and marine water transportation. For gas transportation: coal gas, steam, and liquefied petroleum gas. For structural use: as pile pipes, bridges; pipes for docks, roads, building structures, and marine pile pipes, etc.
Galvanized steel pipe is a welded steel pipe with hot-dip or electroplated zinc layer on the surface. Galvanizing can increase the corrosion resistance of steel pipes and extend their service life. Galvanized pipes are widely used. In addition to being used as pipeline pipes for general low-pressure fluids such as water, gas, and oil, they are also used as oil well pipes and oil pipelines in the petroleum industry, especially offshore oil fields, oil heaters, condenser coolers, coal distillation and washing oil exchangers for chemical coking equipment, as well as pier piles and support frames for mine tunnels.
Ductile iron pipe is a type of cast iron pipe. The quality requirement is that the spheroidization level of cast iron pipe should be controlled at level 1-3 and the spheroidization rate should be greater than 80%, so the mechanical properties of the material itself are well improved, with the essence of iron and the performance of steel. The metallographic structure of ductile iron pipe after annealing is ferrite plus a small amount of pearlite, with good mechanical properties, excellent anti-corrosion performance, good ductility, good sealing effect, easy installation, and mainly used for water supply, gas transmission, oil transmission, etc. in municipal and industrial and mining enterprises
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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