Seamless Tube

Seamless pipe product introduction

product overview
Seamless Steel Pipe is a seamless steel pipe made by piercing round steel billets, hot rolling or cold drawing processes, with characteristics such as high strength, high pressure resistance, and high precision. The product is widely used in fields such as petroleum, chemical, power, and machinery, especially suitable for harsh working conditions such as high temperature, high pressure, and corrosive media.  

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Core advantages
✅  No weld defects
-Integrated molding, no welding weak points, pressure bearing capacity increased by more than 30%
-Through 100% eddy current/ultrasonic testing

✅  High pressure and high temperature resistance
-Maximum pressure bearing capacity of 100MPa (such as P91 alloy steel)
-Temperature resistance range -196 ℃~+800 ℃ (austenitic stainless steel)

✅  Precision dimensional control
-Cold drawn tube tolerance: outer diameter ± 0.1mm, wall thickness ± 0.05mm
-Surface roughness Ra ≤ 0.8 μ m (for precision hydraulic pipes)

✅  Diversified materials
-Carbon steel (20, 45), alloy steel (15CrMo, P92)
-Stainless steel (304, 316L), duplex steel (2205)

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Main classification and purpose
|Type | Process | Typical Specifications (mm) | Main Applications|
|------------------|-------------------|-------------------------|---------------------------|  
|Hot rolled seamless tube | Hot perforation+rolling | Φ 25- Φ 630 × 2.5-75mm | Petroleum cracking tube, boiler tube|
|Cold drawn seamless tube | Cold drawing+finishing | Φ 6- Φ 250 × 0.5-20mm | Hydraulic cylinder tube, precision mechanical components|
|Alloy steel seamless pipe | Adding Cr/Mo/V and other elements | Φ 10- Φ 500 × 1.0-40mm | High pressure pipelines for power plants and chemical equipment|
|Stainless steel seamless pipe | Solution treatment | Φ 5- Φ 325 × 0.5-30mm | Food/pharmaceutical equipment, seawater desalination|

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Technical Parameter
-Execution standards: GB/T 8163, ASTM A106, API 5CT, EN 10216
-Mechanical properties: Tensile strength ≥ 415MPa (20 steel), elongation ≥ 25%
-Testing and Certification: Provide third-party SGS/BV testing reports (including intergranular corrosion tests)
-Special treatment: internal polishing (Ra ≤ 0.4 μ m), acid pickling and passivation (stainless steel pipe)

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value-added services
Customized processing: supports straightening, cutting to length, and threading (NPT/API)
Performance optimization: Normalization/tempering heat treatment enhances mechanical performance
Technical consultation: providing material selection suggestions and failure analysis
Logistics solution: Capillary specialized packaging (shockproof and pressure resistant)

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Reliable selection for harsh working conditions
We have:
-Full process control: Quality control of the entire industry chain from steelmaking to finished products
-Special equipment qualification: TS certification (pressure pipeline specialized pipe)
-Quick delivery: Regular inventory of 3000 tons, urgent orders delivered within 5 days