Seamless Steel Pipes

As a premier Chinese manufacturer specializing in high-performance Seamless (SMLS) Steel Pipes, we provide integrated pipeline solutions for critical high-pressure, high-temperature, and corrosive environments. Our pipes are manufactured through advanced hot-rolling and cold-drawing processes, ensuring zero weld-seam risk and superior mechanical integrity for the most demanding industrial applications.

We maintain an extensive inventory and production flexibility to meet diverse project requirements:

Outside Diameter (O.D.): 1/4” – 36” (13.7mm – 914.4mm)

Wall Thickness (W.T.): SCH 10, SCH 20, SCH 40, SCH 80, SCH 160, STD, XS, XXS (Up to 100mm)

Standard Lengths:

SRL (Single Random Length): 5.8m – 7.0m

DRL (Double Random Length): 10m – 12.8m

Fixed Length: Precision cutting to specified lengths up to 15 meters.

Our SMLS pipes strictly adhere to international regulatory frameworks, facilitating seamless procurement for global engineers:

Oil & Gas (Line Pipe): API 5L (PSL1 & PSL2) – Grades B through X80.

High-Temperature Service: ASTM A106 Grade B/C, ASME SA106.

Low-Temperature Service: ASTM A333 Grade 1/3/6.

Structural & Mechanical: ASTM A53 Grade B, EN 10210 (S355J2H), DIN 1629.

Boiler & Heat Exchanger: ASTM A179, ASTM A192, ASTM A213.

Our seamless solutions are the preferred choice for sectors where safety and durability are non-negotiable:

Energy & Petrochemical: Refineries, offshore drilling, and high-pressure gas transmission.

Power Generation: High-pressure boiler tubes and steam pipelines.

Mechanical & Hydraulic: Hydraulic cylinders, automotive precision parts, and heavy-duty structural frames.

Nuclear & Chemical: High-purity and hazardous fluid conveyance.

To ensure superior field performance and extended service life:

End Finishing:

Bevelled Ends: Precisely machined to 30° (+5°/-0°) with a 1.6mm root face (ANSI B16.25).

Plain Ends: Square cut and deburred for high-pressure socket welding.

Threaded Ends: According to API 5B/ASTM for mechanical coupling.

Surface Mitigation:

Anti-Corrosion Coating: 3PE, 3PP, FBE (Fusion Bonded Epoxy) compliant with DIN 30670.

Atmospheric Protection: Black vanish, clear oiling, or hot-dipped galvanizing (HDG) for severe environments.

100% Non-Destructive Testing (NDT): Ultrasonic (UT), Eddy Current (ET), and Magnetic Particle Inspection (MPI).

Hydrostatic Analysis: Every pipe is pressure-tested to verify wall integrity.

Documentation: Fully traceable Mill Test Certificates (MTC) issued according to EN 10204 3.1 (3.2 available).

Third-Party Inspection (TPI): Full cooperation with SGS, BV, TUV, DNV, or ABS.

We prioritize the arrival of your cargo in "Mill-New" condition:

Packaging: Hexagonal bundles for small diameters; loose or wooden-crate packaging for high-precision boiler tubes.

End Protection: Heavy-duty recessed plastic caps or metal protectors to safeguard bevels and internal surfaces.

Maritime Logistics:

Strict use of nylon slings to mitigate surface scarring.

Robust sea-worthy bracing and moisture-proof wrapping for long-haul maritime transit.

Professional stenciling for rapid identification at the destination port.