Carbon Steel Welded & Seamless Pipes/Tubes

Carbon Steel

Carbon Steel Welded & Seamless Pipes/Tubes

Carbon Steel Welded & Seamless Pipes/Tubes come with a full range of specifications and sizes to meet various industrial application requirements. Welded pipes are manufactured through mature fabrication processes for versatile usage, while seamless pipes are widely applied in petroleum, chemical, construction, power and other key fields. Both types feature outstanding hardness, strength, wear resistance and corrosion resistance, ensuring stable performance in demanding working conditions.

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Technical Data

Specifications

Production Range

Specification	Details
Product Type	Welded Pipes: ERW (Electric-Resistance-Welded), LSAW, SSAW, Threaded, Screwed & Socketed;Seamless Pipes: Casing, Tubing, Line Pipes, Structural Pipes, Boiler/Heat-Exchanger Tubes, Mechanical Tubes, Scaffolding Pipes; also available in square/rectangular profiles
Dimension / Size	Casing (API 5CT): Ø48.3~273 mm × WT2.77~22.2 mm;Tubing (API 5CT): Ø48.3~273 mm × WT2.77~16 mm;Line Pipes (API 5L): Ø10.3~1200 mm × WT1.0~120 mm;Scaffolding Pipes (EN): Ø48.3 mm × WT3.2~4 mm;General Pipes (JIS): Ø15~762 mm × WT0.7~120 mm (Structural/General/Machine/Pressure/Piping); Rectangular: 16×16~150×150 mm × WT0.7~6 mm;Square Pipes (ASTM): 25×25~160×160 mm × WT1.2~8.0 mm;Length: 1000~12000 mm (customizable)
Grade	API 5CT: J55, K55, N80, L80, P110, H40;API 5L: A25, A, B, X42, X46, X52, X56, X60, X65, X70, X80 (PSL1/PSL2);ASTM/ASME: Gr.A/B/C, Gr.B/C, T5, T22, A1, C, T5, T9, T11, T12, T22, T91, Gr.1, Gr.3, Gr.6, A2, B2;DIN: St35.8, St45.8, 10CrMo910, 15Mo3, 13CrMo44, STPL340, STB410, STB510, WB36, St37.0, St44.0, St52.0, St52.3, St33.2, RSt34-2, RSt37-2, RSt44-2, St52;BS: Carbon Steel, 360, 410, 440, 460, 490;EN: S235JR, S235JO, S235J2, S275JR, S275JO, S275J2, S355JR, S355JO, S355J2, P235GH, P265GH, P295GH, 16Mo3, 10CrMo9-10, 13CrMo4-5;JIS: Carbon Steel, STKM11A, STKM13A, G16~G104, C19~C75, E19~E75;General Carbon Steel: Q235, Q355, A36, S235JR, S355JR, 10#, 20#, 45#, 16Mn
Production Standard	API: API 5CT, API 5L;ASTM/ASME: ASTM A53, ASTM A106, ASTM A179, ASTM A192, ASTM A199, ASTM A210, ASTM A213, ASTM A333, ASTM A334, ASTM A556, ASTM A135, ASTM A252, ASTM A500;DIN: DIN 17175, DIN 1629, DIN 2391, DIN 2440, DIN 2393;BS: BS 970, BS 3059, BS 1387;EN: EN 39, EN 10210, EN 10216, EN 10217, EN 10219, EN 10220;JIS: JIS G3444, JIS G3445, JIS G3452, JIS G3454, JIS G3455, JIS G8305, JIS G3466;GB: GB/T 8162, GB/T 8163, GB/T 9711

Industry Use Cases

Applications

Oil & Gas Pipeline Networks

API 5L X42–X80 line pipe and API 5CT casing/tubing grades are the global standard for long-distance crude oil and natural gas transmission, downhole drilling, and wellhead completions — engineered for demanding operating pressures and corrosive environments.

Power Generation & Boiler Systems

ASTM A106/A213 seamless pipes and boiler tubes withstand the combination of high pressure, elevated temperature, and steam exposure inside thermal power plants and industrial boilers — where reliability over decades of continuous operation is non-negotiable.

Construction Scaffolding & Structural Frames

EN 10219 / ASTM A500 hollow sections and EN 39 scaffolding pipes (Ø48.3 mm) provide the load-bearing framework for high-rise construction sites, bridge falsework, and modular industrial structures — the global standard for safe temporary and permanent works.

Carbon Steel Welded & Seamless Pipes/Tubes

Specifications

Production Range

Applications

Oil & Gas Pipeline Networks

Power Generation & Boiler Systems

Construction Scaffolding & Structural Frames

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