English
Carbon steel seamless steel pipe is a type of steel pipe that is manufactured without any welded joints or seams. It is produced by piercing a solid billet of carbon steel to create a hollow tube. carbon steel is an alloy of iron and carbon, with a carbon content typically ranging from 0.05% to 2.0%. These pipes are manufactured without any welding seam, using processes such as hot rolling, cold drawing, or extrusion.
Carbon steel seamless steel pipes are widely used across various industries due to their exceptional strength, reliability, and versatility. Their ability to withstand high pressures, extreme temperatures, and corrosive environments makes them indispensable in many critical sectors.
| Type | Description | Applications |
| Structural Seamless Steel Pipes | Used in construction and engineering projects. | Bridges, buildings, structural applications. |
| Fluid Transport Seamless Steel Pipes | Designed for conveying fluids. | Pipelines, plumbing systems. |
| Boiler Seamless Steel Pipes | Specifically for boilers and heat exchangers. | Boilers, heat exchangers. |
| Mechanical Seamless Steel Pipes | Used in manufacturing machinery and equipment. | Machinery, equipment manufacturing. |
| Petrochemical Seamless Steel Pipes | For transporting chemicals under extreme conditions. | Petrochemical industry. |
| Hydraulic Seamless Steel Pipes | Employed in hydraulic systems. | Hydraulic systems. |
| High-Pressure Seamless Steel Pipes | Designed for high-pressure applications. | Power plants, high-pressure vessels. |
| Geothermal Seamless Steel Pipes | Used in geothermal energy systems. | Geothermal energy systems. |
| Hot-Rolled Seamless Steel Pipes | Produced by heating and rolling a steel billet. | Oil and gas pipelines, structural applications. |
| Cold-Drawn Seamless Steel Pipes | Manufactured by drawing hot-rolled pipes through a die. | Precision machinery, automotive components. |
| Galvanized Seamless Steel Pipes | Coated with zinc for corrosion resistance. | Outdoor applications, corrosive environments. |
| Black Seamless Steel Pipes | Uncoated with a dark oxide layer. | General applications where corrosion is not a concern. |
| ASTM A53 Gr.B | Black and hot-dipped zinc-coated steel pipes welded and seamless |
| ASTM A106 Gr.B | Seamless carbon steel for high temperature service |
| ASTM SA179 | Seamless cold-drawn low-carbon steel heat exchanger and condenser tubes |
| ASTM SA192 | Seamless carbon steel boiler tubes for high pressure |
| ASTM SA210 | Seamless Medium-carbon boiler and superheater tubes |
| ASTM A213 | Seamless alloy-steel boiler, superheater, and heat-exchanger tubes |
| ASTM A333 GR.6 | seamless and welded carbon and alloy steel pipe intended for use at low temperatures. |
| ASTM A335 P9,P11,T22,T91 | Seamless ferritic alloy-steel pipe for high-temperature service |
| ASTM A336 | Alloy steel forgings for pressure and high-temperature parts |
| ASTM SA519 4140/4130 | Seamless carbon for mechanical tubing |
| API Spec 5CT J55/K55/N80/L80/P110/K55 | Seamless steel pipe for casing |
| API Spec 5L PSL1/PSL2 Gr.b, X42/46/52/56/65/70 | Seamless steel pipe for line pipe |
| DIN 17175 | Seamless steel tube for elevated temperture |
| DN2391 | Cold drawn seamless prevision pipe |
| DIN 1629 | Seamless circular unalloyed steel tubes subject to special requirements |
| standard | Grade | Chemical Components (%) | Mechanical Properties | |||||
| C | Si | Mn | P | S | Tensile STrength(Mpa) | Yield STrength(Mpa) | ||
| ASTM A53 | A | ≤0.25 | - | ≤0.95 | ≤0.05 | ≤0.06 | ≥330 | ≥205 |
| B | ≤0.30 | - | ≤1.2 | ≤0.05 | ≤0.06 | ≥415 | ≥240 | |
| ASTM A106 | A | ≤0.30 | ≥0.10 | 0.29-1.06 | ≤0.035 | ≤0.035 | ≥415 | ≥240 |
| B | ≤0.35 | ≥0.10 | 0.29-1.06 | ≤0.035 | ≤0.035 | ≥485 | ≥275 | |
| ASTM A179 | A179 | 0.06-0.18 | - | 0.27-0.63 | ≤0.035 | ≤0.035 | ≥325 | ≥180 |
| ASTM A192 | A192 | 0.06-0.18 | ≤0.25 | 0.27-0.63 | ≤0.035 | ≤0.035 | ≥325 | ≥180 |
| API 5L PSL1 | A | 0.22 | - | 0.9 | 0.03 | 0.03 | ≥331 | ≥207 |
| B | 0.28 | - | 1.2 | 0.03 | 0.03 | ≥414 | ≥241 | |
| X42 | 0.28 | - | 1.3 | 0.03 | 0.03 | ≥414 | ≥290 | |
| X46 | 0.28 | - | 1.4 | 0.03 | 0.03 | ≥434 | ≥317 | |
| X52 | 0.28 | - | 1.4 | 0.03 | 0.03 | ≥455 | ≥359 | |
| X56 | 0.28 | - | 1.4 | 0.03 | 0.03 | ≥490 | ≥386 | |
| X60 | 0.28 | - | 1.4 | 0.03 | 0.03 | ≥517 | ≥448 | |
| X65 | 0.28 | - | 1.4 | 0.03 | 0.03 | ≥531 | ≥448 | |
| X70 | 0.28 | - | 1.4 | 0.03 | 0.03 | ≥565 | ≥483 | |
| API 5L PSL2 | B | 0.24 | - | 1.2 | 0.025 | 0.015 | ≥414 | ≥241 |
| X42 | 0.24 | - | 1.3 | 0.025 | 0.015 | ≥414 | ≥290 | |
| X46 | 0.24 | - | 1.4 | 0.025 | 0.015 | ≥434 | ≥317 | |
| X52 | 0.24 | - | 1.4 | 0.025 | 0.015 | ≥455 | ≥359 | |
| X56 | 0.24 | - | 1.4 | 0.025 | 0.015 | ≥490 | ≥386 | |
| X60 | 0.24 | - | 1.4 | 0.025 | 0.015 | ≥517 | ≥414 | |
| X65 | 0.24 | - | 1.4 | 0.025 | 0.015 | ≥531 | ≥448 | |
| X70 | 0.24 | - | 1.4 | 0.025 | 0.015 | ≥565 | ≥483 | |
| X80 | 0.24 | - | 1.4 | 0.025 | 0.015 | ≥621 | ≥552 | |
1. Product Name: Carbon Seamless Steel Pipe, Seamless Steel Pipe & Tube, SMLS Pipe & Tube, CS Seamless Pipe, Black Seamless Pipe, Seamless Line pipe
2. Dimensions and Sizes
Outer Diameter (OD): Ranges from 1/8 inch (3.2 mm) to 36 inches (914 mm) or more, depending on the application.
Wall Thickness: Varies from SCH 10 (light wall) to SCH XXS (extra strong) as per ASME B36.10M standards.
Length: Typically 6 meters (20 feet) or custom lengths as required.
Tolerances: Strict dimensional tolerances are maintained for outer diameter, wall thickness, and straightness.
3. Surface Finish
Black Finish: Bare steel surface, suitable for painting or coating.
Galvanized Finish: Coated with zinc for corrosion resistance.
Bevelled Ends: Prepared for welding in pipeline applications.
1. Raw Material Selection: High-quality carbon steel billets.
2. Heating: Billets are heated to high temperatures.
3. Piercing: Formation of a hollow shell.
4. Rolling: Reduction of wall thickness and diameter.
5. Sizing: Achieving final dimensions.
6. Cooling: Controlled cooling to room temperature.
7. Straightening: Correcting bends or distortions.
8. Cutting: Cutting to required lengths.
9. Heat Treatment (Optional): Improving mechanical properties.
10. Surface Treatment: Cleaning and coating (if required).
11. Inspection and Testing: Ensuring quality and compliance.
12. Marking and Packaging: Preparing for shipment.
Transporting crude oil, natural gas, and refined products; used in drilling and offshore platforms.
Transporting chemicals and acids; used in refineries and storage tanks.
Boiler tubes, superheaters, and condensers in power plants.
Structural applications, scaffolding, and piling for buildings and bridges.
Chassis components, exhaust systems, and hydraulic systems.
Machinery parts, bearings, and hydraulic cylinders.
Water supply pipelines, sewage systems, and irrigation.
Slurry transport, ventilation systems, and drilling equipment.
Hydraulic and fuel lines, and structural components.
Wells and heat exchangers.
Piping systems and structural components.
Transporting ammonia and processing equipment.
Processing equipment and beverage transport.
