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ROUND STEEL PIPE

Carbon, alloy, seamless and sharp-corner square & rectangular sections -- every piece backed by an original mill test certificate and cut to your drawing before loading.

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Aug 21, 2026

Q235 Q355 Seamless Welded Round Steel Pipe OD 10-700mm Factory Direct Supplier

<p><strong>Q235 Q355 Seamless and Welded Round Steel Pipe, OD 10–700 mm, wall thickness 1–20 mm</strong> — available in hot-rolled, cold-rolled, and cold-drawn processes with galvanized coating up to 700 g/m² for corrosion resistance. Seamless types suit high-pressure fluid and boiler systems, while welded ERW pipes offer cost efficiency for structural and general pipeline use. Factory-direct supply with original mill test certificates, ISO 9001 and CE certification, plus SGS/BV third-party inspection for full material traceability.</p>

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Aug 21, 2026

Q235 Carbon Steel Welded Pipe OD 10-700mm API ASTM Supplier

<p><strong>Q235 Carbon Steel Welded Pipe, OD 10–700 mm, wall thickness 1–20 mm, length 1–12 m</strong> — available in hot-rolled and cold-rolled processes with ±1% dimensional tolerance, plain, beveled, or threaded ends. Multi-grade coverage includes Q195, Q235, Q355, 16Mn, A53, ST35–ST52 with full API 5L, ASTM, BS EN, and GB/T standard compliance. Custom cutting and bending processing reduce on-site rework. Original mill test certificates with heat number traceability, ISO 9001:2015 and CE certified, SGS/BV third-party inspection available for global shipment.</p>

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Aug 21, 2026

ASTM A106 A53 API 5L Seamless Carbon Steel Pipe OD 10-1000mm Supplier

<p><strong>ASTM A106 / A53 / API 5L Seamless Carbon Steel Pipe, OD 10–1000 mm, WT 1–120 mm</strong> — hot-rolled and cold-drawn processes deliver high-pressure fluid transport capability for oil, gas, and boiler applications. Multi-standard grade coverage (A106 Gr.B, API 5L X42–X70, Q235/Q345) enables single-source procurement for mixed-spec projects with custom end finishing and surface treatment. - ISO 9001:2015, API 5L, and CE certified with original mill test certificates and SGS/BV third-party inspection for full traceability and global customs support.</p>

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Aug 21, 2026

API 5L GR.B Spiral Welded Steel Pipe OD 10-1000mm Supplier

<p><strong>API 5L GR.B Spiral Welded Steel Pipe, OD 10–1000 mm, WT 1–80 mm</strong> — available in grades up to X70/L415 for both standard piling and high-strength pressure applications. SSAW spiral welding process suits large-diameter requirements, with ±1% thickness tolerance and options for black painting, oiled, or bare surface treatment. Custom length cutting and beveled/plain ends provided to match pile driving or site welding needs. Every shipment includes original mill test certificates with full traceability, backed by ISO 9001:2015 and CE certification for verified quality on every length.</p>

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Aug 21, 2026

Q235 Q345 API 5L Carbon Steel Seamless & Welded Pipe OD 10-1000mm Supplier

<p><strong>Q235 Q345 API 5L Carbon Steel Seamless & Welded Pipe, OD 10–1000 mm, WT 1–120 mm</strong> — available in hot-rolled seamless and welded types with multi-standard grade coverage (GB, ASTM, API, JIS, DIN) and ±1% thickness tolerance for pressure and structural piping. Custom length cutting and end finishing (plain, beveled, threaded) reduce on-site fabrication waste. Full certifications (ISO 9001, CE) with SGS/BV third-party inspection and export documentation support for smooth customs clearance.</p>

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Aug 21, 2026

X42-X65 Spiral Welded Steel Pipe API 5L SSAW Supplier

<p><strong>X42-X65 Spiral Welded Steel Pipe, API 5L, OD 10–1000 mm, WT 1–80 mm</strong> — hot-rolled SSAW process ensures consistent weld seam quality for high-pressure oil & gas transmission and structural piling. Available in grades up to X70 with full heat number traceability, custom length cutting, and beveled ends for on-site welding.</p> <ul> <li>Original mill test certificates provided with every shipment</li> <li>SGS/BV third-party inspection and ISO 9001/API/CE certified</li> <li>Professional heavy-cargo loading for open-top and break-bulk shipping</li> </ul>

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Aug 21, 2026

Q235 Q345 Seamless Carbon Steel Pipe OD 10-1000mm Supplier

<p><strong>Q235 Q345 Seamless Carbon Steel Pipe, OD 10–1000 mm, WT 1–120 mm</strong> — hot-rolled or cold-drawn process ensures high pressure resistance for fluid transport, boiler, and structural applications. Multi-standard coverage including GB, ASTM A53/A106, and API 5L eliminates grade confusion across global projects. Full range of sizes with original mill test certificates, ISO 9001:2015 and CE certified, plus SGS/BV third-party inspection for complete traceability and smooth customs clearance.</p>

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Aug 21, 2026

API 5L X42 X52 X60 Spiral Welded Steel Pipe Supplier

<p><strong>API 5L X42/X52/X60/X70 PSL1 & PSL2 Spiral Welded Steel Pipe, OD 10–1000 mm, WT 1–80 mm</strong> — SSAW process with ±1% tolerance, beveled or plain ends per API 5L, available in black painting, oiled, or bare finish for downstream 3PE anti-corrosion coating. Full heat-number traceability with original mill test certificates, ISO 9001:2015 and CE certified, SGS/BV third-party inspection available before shipment.</p>

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Aug 21, 2026

ASTM A500 Seamless Carbon Steel Pipe OD 10-1000mm Supplier

<p><strong>ASTM A500 Seamless Carbon Steel Pipe, OD 10–1000 mm, WT 2–50 mm</strong>, hot-rolled process ensures high pressure resistance for fluid transport and structural applications. Available in multiple grades from Q235 to X70 with black painting or oiled surface treatment, customizable length 6–12 m with plain or beveled ends. - ISO 9001:2015 and CE certified with SGS/BV third-party inspection available, original mill test certificates provided for full traceability.</p>

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Send grade, dimension and tonnage. We return an equivalent-grade proposal, cutting plan and loading method for your port within 12 working hours.

  • Original mill test certificate, heat-number traceable
  • Plasma / flame cutting to your drawing (± 2 mm typical)
  • Flatbed, open-top and break-bulk shipping planning

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