SD XJY Pipe | Steel Tubes & Section Steel | Sharp-Corner Patented - SD XJY Pipe
41 Patents EST. SHANDONG · CHINA

Patented Sharp-Corner
Square & Rectangular Steel Tube Manufacturer

SD XJY Pipe is the original inventor of right-angle (R≈0) rectangular hollow sections in China -- 41 invention patents, 3 production lines and 2,800+ specifications of steel pipe and section steel, exported to 50+ countries.

  • 2,800+ SPECS
  • WT ≤ 40.0 mm
  • Q195 - Q690 / S355J2
  • EN 10219 · A500 · JIS
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Bundles of sharp-corner square and rectangular steel tubes produced by SD XJY Pipe
Cold-forming production line inside the SD XJY Pipe workshop Steel tube inventory stacked in the SD XJY Pipe warehouse Export packing of steel pipes ready for container loading

41

Invention patents

2,800+

Specifications

40 mm

Max wall thickness

50+

Export countries

Core Strengths

Engineered advantages you can verify on every mill certificate.

  • Patented Sharp-Corner Tube

    China's first right-angle RHS at R≈0 -- flush glazing joints and higher section modulus per kilogram.

  • Wall Thickness up to 40 mm

    Three production lines cover 2,800+ specifications, including heavy structural and non-standard sizes.

  • Industry Standard Co-Drafter

    Participated in drafting China's cold-formed steel industry standard (2018) as a national high-tech enterprise.

  • In-House Laboratory

    Physical and chemical testing on every heat -- ISO 9001:2015, Lloyd's CE, Singapore FPC, SGS/BV verified.

Product Range

Square & rectangular tube, round pipe and section steel.

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Best Sellers

Hot-selling hollow sections shipped worldwide.

Applications

Where our sections perform -- from super-high-rise cores to rail infrastructure.

  • Super High-Rise Buildings

    Heavy-wall SHS/RHS up to 40 mm for columns, cores and transfer trusses.

  • Glass Curtain Walls

    Patented sharp-corner mullions give flush glazing seats and clean sight lines.

  • Machinery Manufacturing

    Precision tube with tight tolerance for frames, booms and equipment bodies.

  • Automotive Industry

    Cold-formed tube for chassis, trailer beams and load-bearing structures.

  • Highway & Railway

    Guardrail posts, bridge members and station canopies with certified grades.

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Trusted Partners

Designated supplier for state-owned groups and listed companies.

Buyers in 50+ countries across EU, North America, the Middle East and Southeast Asia.

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Overseas buyers visiting the SD XJY Pipe production facility
Factory audit visit
International client inspecting steel tube goods before shipment
Pre-shipment inspection
Group photo of overseas customers with the SD XJY Pipe sales team
Client meeting
Container loading of steel pipes for an export order
Export loading

About SD XJY Pipe

Shandong Xin Jiyuan Special Steel Tube Co., Ltd

SD XJY Pipe is the dedicated steel pipe and section steel division of Shandong Xin Jiyuan Special Steel Tube Co., Ltd. Three production lines, 2,800+ specifications and an in-house physical and chemical laboratory support square and rectangular tube, round pipe, H-beam, I-beam, channels and angle bar for global projects.

Production lines
3 lines · 2,800+ specifications
Export markets
50+ countries
Qualification
SOE & listed-company designated supplier
Certifications
ISO 9001 · Lloyd's CE · FPC · SGS/BV
ISO and CE certificate issued to SD XJY Pipe Product quality certificate of SD XJY Pipe Patent certificate for sharp-corner rectangular steel tube International inspection certificate of SD XJY Pipe
SD XJY Pipe headquarters office building Main entrance gate of the SD XJY Pipe factory Steel tube manufacturing shop with forming and welding equipment Interior of the SD XJY Pipe international sales office

Technical Resources

Buying guides, standards and procurement insights.

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Quotation within 12 hours

Send your size list -- we match it against 2,800+ specifications, including non-standard.

Custom cutting, marking, mill test certificates and professional container loading are included on every export order. Low MOQ available for trial shipments.

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Certifications & approvals

  • ISO 9001:2015
  • Lloyd's CE
  • EN 10210 / 10219
  • Singapore FPC
  • SGS verified
  • BV verified
SD XJY Pipe brand logo

In-house laboratory -- every heat tested before shipment.