Alloy pipe is a kind of seamless steel pipe.Alloy pipe is divided into structural seamless pipe and high pressure heat resistant alloy pipe. Mainly different from the production standard of alloy pipe and its industry, annealing and tempering of alloy pipe changes its mechanical properties. achieve the required processing conditions. Its performance is higher than that of ordinary seamless steel pipes, and its chemical composition contains more Cr, and it has high temperature resistance, low temperature resistance and corrosion resistance.
The ordinary carbon seamless pipe does not contain alloy components or has very few alloy components. The reason why the alloy pipes are widely used in petroleum, aerospace, chemical, electric power, boiler, military and other industries is because the mechanical properties of the alloy pipes change and can be adjusted easily.
The material of the alloy tube is roughly: 16-50Mn, 27SiMn, 20-40Cr, 12-42CrMo 16Mn 12Cr1MoV T91 27SiMn 30CrMo 15CrMo 20G Cr9Mo 10CrMo910 15Mo3 15CrMoV 35CrMoV 45CrMo
| Product Name | Alloy Steel Pipe |
| Wall Thickness | 1.5mm-100mm |
| Length | 3m-12m |
| Outer diameter | 22mm-650mm |
| Tolerance | Wall Thickness:±0.05MM Length:±6mm Outer Diameter:±0.3MM |
| Material | Q195-Q345, 10# ,20#,45#,Gr.B-Gr.50, S235JR, SS400, SPHC,16mn, 40cr, 20cr, 42crmo4, 15crmo, 4140, 4130, API5L , ASTM A106 Gr.B, ASTM A53 Gr.B, ST37,ST35,St42,St45,St52, 1010-1050 |
| Standard | ASTM, DIN, JIS, BS, AISI, GB |
| Package | 1. Packed with 8 bundles tightened with metal belt and plastic wrapped if need 2. According to customer's requirement |
| Application | Widely used in furniture,interior decoration, fluid pipeline, petroleum and natural gas industry, drilling, pipeline, structure |
| Advantages | 1.Reasonable price with excellent quality2.Abundant stock and prompt delivery3.Rich supply and export experience, sincere service4.Reliable forwarder |
Seamless steel pipe
Due to different manufacturing processes, it is divided into two types: hot-rolled (extruded) seamless steel pipes and cold-drawn (rolled) seamless steel pipes.
Cold drawn (rolled) tubes are divided into two types: round tubes and special-shaped tubes.
a. Process flow overview
Hot-rolled (extruded seamless steel pipe): The round tube billet is marked for the straightening hydraulic test (or flaw detection) for the heating and perforating three-roll cross-rolling, continuous rolling or extrusion de-piping sizing (or diameter reduction) cooling billet.
Cold-drawn (rolled) seamless steel pipe: round tube billet is heated, perforated, headed, annealed, pickled, oiled (copper-plated), cold-drawn (cold-rolled) billet, heat-treated, straightened, and hydraulically tested (flaw detection) marked for storage.
b. Seamless steel pipes are divided into the following varieties due to their different uses:
| GB/T8162-2008 | (seamless steel pipe for structure)Mainly used for general structure and mechanical structure. Its representative material (brand): carbon steel 20, 45 steel; alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, etc. |
| GB/T8163-2008 | (seamless steel pipe for conveying fluid)It is mainly used for conveying fluid pipelines in engineering and large-scale equipment. The representative material (grade) is 20, Q345, etc. |
| GB3087-2008 | (Seamless steel pipes for low and medium pressure boilers)Mainly used for pipelines for conveying low and medium pressure fluids in industrial boilers and domestic boilers. The representative material is 10, 20 steel. |
| GB5310-1995 | (seamless steel pipes for high pressure boilers)It is mainly used for high temperature and high pressure transport fluid headers and pipes on boilers in power plants and nuclear power plants. The representative materials are 20G, 12Cr1MoVG, 15CrMoG, etc. |
| GB5312-1999 | (carbon steel and carbon-manganese steel seamless steel tubes for ships)Mainly used for Class I and II pressure-resistant pipes for marine boilers and superheaters. The representative material is 360, 410, 460 steel grades, etc. |
| GB1479-2000 | (seamless steel pipe for high pressure fertilizer equipment). It is mainly used for conveying high temperature and high pressure fluid pipelines on fertilizer equipment. The representative materials are 20, 16Mn, 12CrMo, 12Cr2Mo, etc. |
| GB9948-2006 | (seamless steel pipes for petroleum cracking). Mainly used in boilers, heat exchangers and their transmission fluid pipelines in petroleum smelters. Its representative materials are 20, 12CrMo, 1Cr5Mo, 1Cr19Ni11Nb, etc. |
| GB/T3639-1983 | (cold drawn or cold rolled precision seamless steel pipe). It is mainly used for steel pipes for mechanical structures and carbon pressing equipment that require high dimensional accuracy and good surface finish. It represents material 20, 45 steel and so on. |
| GB/T3094-1986 | (cold drawn seamless steel pipe special-shaped steel pipe). It is mainly used to make various structural parts and parts, and its materials are high-quality carbon structural steel and low-alloy structural steel. |
| GB3093-1986 | (high pressure seamless steel pipe for diesel engine). Mainly used for high pressure oil pipe of diesel engine injection system. The steel pipe is generally cold drawn pipe, and its representative material is 20A. |
Packing and Shipping
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1) Standard export package,suit for all kinds of transport,or as required.
2) All standard steel products are stocked, timely shipping as per clients request.
