The GB seamless steel pipe is made of steel ingot or solid tube blank through perforation, and then made by hot rolling, cold rolling or cold drawing.
[1] Seamless pipe for structural use (GB/T8162-2008) is a seamless steel pipe for general structure and mechanical structure.
[2] Seamless steel pipe for fluid transportation (GB/T8163-2008) is a general seamless steel pipe used to transport fluids such as water, oil, and gas.
[3] Seamless steel tubes for low and medium pressure boilers (GB3087-2008) are high-quality carbon structural steels used in the manufacture of superheated steam pipes for various structural low and medium pressure boilers, boiling water pipes, and overheated steam pipes and arched bricks for locomotive boilers. Hot rolled and cold drawn (rolled) seamless steel tubes.
[4] Seamless steel tubes for high pressure boilers (GB5310-2008) are high-quality carbon steel, alloy steel and stainless heat-resistant seamless steel tubes for the heating surface of water-tube boilers used to produce high pressure and higher pressures.
[5] High-pressure seamless steel tubes for chemical fertilizer equipment (GB6479-2000) are high-quality carbon structural steel and alloy steel seamless pipes suitable for chemical equipment and pipelines with an operating temperature of -40 to 400°C and a working pressure of 10 to 30 Ma.
[6] Seamless steel pipe for oil cracking (GB9948-2006) is a seamless steel pipe for furnace tubes, heat exchangers and pipes in petroleum refineries.
[7] The geological drilling steel pipe (YB235-70) is a steel pipe used by the geological department for core drilling. It can be divided into drill pipes, drill collars, core pipes, casing pipes, and sedimentation pipes according to applications.
[8] Diamond core drilling seamless steel pipe (GB3423-82) is a seamless steel pipe used for drilling of diamond cores, core rods, and casing.
[9] Oil drilling pipe (YB528-65) is a seamless steel pipe used for thickening or thickening at both ends of oil drilling. The steel pipe is divided into two types, namely the sub-car wire and the non-car wire, and the wire pipe is connected with the joint. The butt welding method of the wire car pipe is connected with the tool joint.
[10] Carbon steel seamless steel tubes for ships (GB5213-85) are carbon steel seamless tubes for the production of Class I pressure piping systems, Class II pressure piping systems, boilers and superheaters for ships. Carbon steel seamless steel pipe wall temperature does not exceed 450 °C, alloy steel seamless pipe wall temperature exceeds 450 °C.
[11] The seamless steel pipe for automobile half-axle casing (GB3088-82) is a high-quality carbon structural steel and alloy structural steel hot-rolled seamless steel pipe for the manufacture of automotive axle bushings and drive axle housings.
[12] The high-pressure fuel pipe for diesel engines (GB3093-2002) is a cold-drawn seamless steel pipe for the high pressure pipes used in the manufacture of diesel injection systems.
[13] Precision inner diameter seamless steel tubes for hydraulic and pneumatic cylinders (GB8713-88) are precision-drawn or cold-rolled precision seamless steel tubes with precision inner diameter dimensions for the manufacture of hydraulic and pneumatic cylinders.
[14] Cold-drawn or cold-rolled precision seamless steel pipe (GB3639-2000) is a cold drawn or cold-rolled precision seamless steel pipe used for mechanical structures and hydraulic equipment with high dimensional accuracy and good surface finish. The use of precision seamless steel pipe manufacturing machinery structures or hydraulic equipment, etc., can greatly reduce the mechanical processing time, improve the material utilization, and help improve product quality.
[15] Stainless steel seamless pipe for structural use (GB/T14975-2002) is a hot-rolled stainless steel made of stainless steel that is widely used in the chemical industry, petroleum, textile, medical, food, machinery and other industrial corrosion-resistant pipes and structural parts and components. (Squeeze, expand) and cold drawn (rolled) seamless steel tubes.
[16] Stainless steel seamless pipe for fluid transportation (GB/T14976-2002) is a hot rolled (extruded, expanded) and cold drawn (rolled) seamless steel pipe made of stainless steel for conveying fluids.
[17] Shaped seamless steel tubes are a general term for seamless steel tubes of other cross-sectional shapes other than round tubes. According to the different shapes and sizes of steel pipe sections, they can be divided into equal-wall thickness special-shaped seamless steel pipes (code D), unequal wall thickness profiled seamless steel pipes (codenamed BD) and variable-diameter special-shaped seamless steel pipes (coded as BJ). Shaped seamless steel tubes are widely used in various structural parts, tools and mechanical parts. Compared with round tubes, shaped tubes generally have larger moments of inertia and section modulus, and have greater resistance to bending and torsion, which can greatly reduce the structural weight and save steel.
[18] Seamless steel tubes for low temperature pipelines (GB/T18984-2003) are suitable for use in seamless steel tubes for low temperature pressure vessel pipes and low temperature heat exchanger pipes of -45°C to -195°C class.
GB 8162-2008 Seamless Steel pipe
The seamless structural tube (GB 8162-2008) is a kind of tube for general structure and mechanical structure. It is a variety of seamless steel pipe because of its different uses.
- Outer diameter:1/2″ to 36″
- Wall thickness:SCH 40, SCH 80, SCH 160, SCH XS, SCH XXS, All Schedules
- Application： It is used for common structures and mechanical structures.
- Main Steel Tube Grades：10, 20, 35, 45, 16Mn, 12CrMo, 15CrMo, 12Cr1MoV etc.
Chemical Composition
| Standard | Grade | Chemical Composition % | |||||||
| C | Si | Mn | P, S | Cu | Ni | Mo | Cr | ||
| GB/T8162 | 10 | 0.07-0.14 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.25 | ≤0.25 | / | ≤0.15 |
| 20 | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.25 | ≤0.25 | / | ≤0.25 | |
| 35 | 0.32-0.40 | 0.17-0.37 | 0.50-0.80 | ≤0.035 | ≤0.25 | ≤0.25 | / | ≤0.25 | |
| 45 | 0.42-0.50 | 0.17-0.37 | 0.50-0.80 | ≤0.035 | ≤0.25 | ≤0.25 | / | ≤0.25 | |
| 16Mn | 0.12-0.20 | 0.20-0.55 | 1.20-1.60 | ≤0.035 | ≤0.25 | ≤0.25 | / | ≤0.25 | |
| 12CrMo | 0.08-0.15 | 0.17-0.37 | 0.40-0.70 | ≤0.035 | ≤0.25 | ≤0.30 | 0.40-0.55 | 0.40-0.70 | |
| 15CrMo | 0.12-0.18 | 0.17-0.37 | 0.40-0.70 | ≤0.035 | ≤0.25 | ≤0.30 | 0.40-0.55 | 0.80-1.10 | |
| 12Cr1MoV | 0.08-0.15 | 0.17-0.37 | 0.40-0.70 | ≤0.035 | ≤0.25 | ≤0.30 | 0.25-0.35 | 0.90-1.20 |
|
Mechanical Properties
| Standard | Grade | Mechanical Properties | ||
| Tensile Strength MPa | Yield Strength MPa | Elongation % | ||
| GB/T8162 | 10 | ≥335 | ≥205 | ≥24 |
| 20 | ≥390 | ≥245 | ≥20 | |
| 35 | ≥510 | ≥305 | ≥17 | |
| 45 | ≥590 | ≥335 | ≥14 | |
| 16Mn | ≥490 | ≥325 | ≥21 | |
| 12CrMo | ≥410 | ≥265 | ≥24 | |
| 15CrMo | ≥440 | ≥295 | ≥22 | |
| 12Cr1MoV | ≥490 | ≥245 | ≥22 |
GB 8162 cold rolled seamless tube
