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Alloy steel pipe is mainly used in power plants, nuclear power, high-pressure boilers, high-temperature superheater and reheater and other high-pressure high-temperature pipes and equipment, it is made of high-quality carbon steel, alloy structural steel and stainless heat-resistant steel material, made by hot rolling (extrusion, expansion) or cold rolling (drawing) . Alloy pipe with hollow section, a large number of pipes used for conveying fluids, such as oil, natural gas, gas, water, machining, and some solid materials pipeline. Compared with solid steel such as round steel, alloy steel tube is lighter in weight when its bending and torsional strength are the same, such as oil drill pipe, automobile transmission shaft, bicycle frame and steel scaffolding used in construction. Using alloy steel pipe to make ring parts can improve material utilization, simplify manufacturing process, save material and processing time, such as rolling bearing ring, Jack sleeve, etc. . Alloy steel pipes are also indispensable materials for all kinds of Conventional weapon. The gun barrel, barrel and so on are all made of steel pipes. Alloy steel tubes can be divided into round tubes and special-shaped tubes according to the shape of the cross-sectional area. Because the circular area is the largest under the condition of equal circumference, more fluid can be transported by circular pipe. In addition, the circular cross-section under internal or external radial pressure, the force is more uniform, therefore, the vast majority of steel tubes are circular. Alloy pipe with large diameter alloy pipe, thick-wall alloy pipe, high-pressure alloy pipe, alloy flange, alloy elbow, P91 alloy pipe and seamless steel pipe, in addition fertilizer pipe is also very common.
| Descriptions | Grades | Standard | Specification (OD*WT)mm |
Usage |
| Structural steel pipe | 20# 35# 45# Q345B, 16Mn, Q345B-E, 20Mn2, 25Mn, 30Mn2, 40Mn2, 45Mn2, SAE1018, SAE1020, SAE1518, SAE1045. | GB/T8162-2008 | 6-1020*1.5-100 | For common structure |
| Fluid steel pipe | 10#, 20#, ASTM A106, A210, A53, 16Mn, Q345A.B.C.D.E, Q295B.C.D.E | GB/T8163-2008 | 8-630*1.0-40 | Fluid feeding |
| High pressure boiler pipe | 20G, 15MnG, 20MnG, 15CrMoG, 12Cr1MoVG, St35.8, St45, SA106b, SA106c, SA210a, SA210c, A335P2, P11, P12, P22, P91, P92, A213 T2,T9, T11, T12, T22, T23, T91 | GB/5310-2008, ASTM A 106-99, DIN 17175-79 |
14-630*2-80 | Temperature-resistant seamless steel pipe far high-pressure boiler |
| Oil casing pipe | API SPEC 5CT J55, K55, N80, L80, C90, C95, P110 | API SPEC 5CT, SY/T6194-96, GB/T222-84, | 10-530*1.5-36 | Boiler pipes for refinery,heat-exchangeing pipes,seamless steel pipes for pipeline |
| Pipeline | API SPEC 5L, X42, X52, X60, X65,X70,X80 ASTM A53, ASTM A106, ASTM A333, BS301, BS3602, BS3603, BS3604, PSL1, PSL2, DNV-OS-F101, CSA-Z245 |
API SPEC 5L, ISO 3183, GB/T 9711 | 60-630*1.5-40 | Carrying gas,water or oil in the industries of petroleum and natural gas |
| Alloy steel pipe | 4140, 42CrMo, 32CrMo, 15CrMo, Cr5Mo, 13CrMo44, 12Cr1MoV P22 T91,P91,P9, T9, Wb36 | GB5310-95, GB9948-88, ASTM A335/A335M, ASTM A213/213M, DIN17175-79, JISG3467-88, JISG3458-88 |
16-824*2-100 | The seamless steal pipes features resistance to high pressure,high/low temperature and corrosion ano is used in the industries of petroleum, chemical engineering and. Electric power as well as boiler |
| Hydraulic prop pipe | 20#, 45#, 27SiMn, 30CrMoSiA | GB/T17396-2009 | 70-377*9-40 | Coal mine hydraulic support and pillar cylinder, column, can also be used for other hydraulic cylinder, column |
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