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Seamless steel pipe is regularly used in producing mechanical pipe, structural pipe, shipbuilding pipe, boiler tube, liquid pipeline etc. Seamless steel pipe has so wide application because of the following performance: 1.Strength and Durability; 2.Uniformity and Homogeneity; 3.Corrosion Resistance; 4.Seamless Flow; 5.Precision and Dimensional Accuracy.
Seamless steel pipes are renowned for their superior strength and durability. The absence of welds or joints eliminates weak points in the pipe structure, ensuring enhanced resistance to pressure, impact, and external forces. This makes seamless steel pipes suitable for applications that require high-performance pipes capable of withstanding extreme conditions and heavy loads. The seamless manufacturing process of these pipes ensures a uniform and homogeneous structure throughout the pipe length. This uniformity leads to consistent mechanical properties, including tensile strength, yield strength, and elongation, ensuring predictable and reliable performance.
| Standard | Grade | Chemical Components (% | Mechanical Properties | |||||
| ASTM A53 | C | Si | Mn | P | S | Tensile STrength(Mpa) | Yield STrength(Mpa） | |
| A | ≤0.25 | 一 | ≤0.95 | ≤0.05 | ≤0.06 | ≥330 | ≥205 | |
| B | ≤0.30 | 一 | 51.2 | S0.05 | S0.06 | 2415 | ≥240 | |
| ASTM A106 | A | ≤0.30 | 20.1 | 0.29-1.06 | ≤0.035 | ≤0,035 | 2415 | 2240 |
| B | ≤0.35 | 20.1 | 0.29-1.06 | ≤0.035 | ≤0.035 | ≥485 | ≥275 | |
| ASTM SA179 | A179 | 0.06-0.18 | 0.27-0.63 | ≤0.035 | ≤0.035 | ≥325 | ≥180 | |
| ASTM SA192 | A192 | 0.06-0.18 | ≤0.25 | 0.27-0.63 | ≤0.035 | 50.035 | ≥325 | ≥180 |
| API5L PSL1 | A | 0.22 | 一 | 0.9 | 0.03 | 0.03 | 2331 | ≥207 |
| B | 0.28 | 一 | 1.2 | 0.03 | 0.03 | ≥414 | ≥241 | |
| X42 | 0.28 | 一 | 1.3 | 0.03 | 0.03 | ≥414 | ≥290 | |
| X46 | 0.28 | 一 | 1.4 | 0.03 | 0.03 | 2434 | 2317 | |
| X52 | 0.28 | 一 | 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 | 2517 | ≥448 | ||
| X65 | 0.28 | 一 | 1.4 | 0.03 | 0.03 | ≥531 | ≥448 | |
| X70 | 0.28 | 一 | 1.4 | 0.03 | 0.03 | ≥565 | 2483 | |
| API5L PSL2 | B | 0.24 | 一 | 1.2 | 0.025 | 0.015 | ≥414 | ≥241 |
| X42 | 0.24 | 1.3 | 0.025 | 0.015 | 2414 | ≥290 | ||
| X46 | 0.24 | 一 | 1.4 | 0.025 | 0.015 | ≥434 | ≥317 | |
| X52 | 0.24 | 一 | 1.4 | 0.025 | 0.015 | ≥455 | ≥359 | |
| X56 | 0.24 | 1.4 | 0.025 | 0.015 | ≥490 | ≥386 | ||
| X60 | 0.24 | 一 | 1.4 | 0.025 | 0.015 | ≥517 | 2414 | |
| X65 | 0.24 | 一 | 1.4 | 0.025 | 0.015 | ≥531 | ≥448 | |
| X70 | 0.24 | 一 | 1.4 | 0.025 | 0.015 | ≥565 | 2483 | |
| X80 | 0.24 | 1.4 | 0.025 | 0.015 | ≥621 | ≥552 | ||
Uses of seamless steel pipe include energy, construction, automotive, marine and offshore industries, telecommunication, agriculture and general fabrication.
Seamless steel pipe has a large number of applications in the field of construction, mainly used in building structures and reinforced concrete formwork.
Semaless steel pipe also has important applications in shipbuilding. It is mainly used to build the main structure of the ship, such as the hull, deck, bow, stern and other parts.
Widely used in oil and gas extraction, transportation and processing. It is used in the manufacture of oil well pipes, pipelines, drilling pipes and other petroleum equipment.
Seamless steel pipe is widely used to manufacture a variety of mechanical equipment and parts, such as automobiles, ships, airplanes and construction machinery etc.
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