Steel Tube & Section Solutions
Engineered for Your Industry
From patented sharp-corner rectangular tube for glass curtain walls to heavy-wall hollow sections for energy, rail and machinery -- SD XJY Pipe matches every application with the right grade, geometry and certification package. Wall thickness up to 40 mm, non-standard sizes welcome.
Solution capability at a glance
- Invention patents
- 41
- Specifications
- 2,800+
- Maximum wall thickness
- 40 mm
- Production lines
- 3
Invention patents
Specifications
Max wall thickness
Production lines
ISO 9001:2015 · Lloyd's CE (EN 10210/10219) · Singapore FPC · SGS & BV verified
Downstream Industries
Six application fields. One certified tube & section supply chain.
Select an industry to jump to the matching material, geometry and standard package.
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Patented
Super High-Rise & Glass Curtain Wall
Sharp-corner RHS mullions and transoms with R≈0 edges for flush glazing lines.
20×20 - 500×500 mm · R ≈ 0
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Machinery Manufacturing
Precision welded and seamless hollow sections for frames, booms and equipment bodies.
WT ≤ 40.0 mm · 20# / 45#
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Automotive Industry
High-strength tube for chassis, trailer frames, semi-trailer beams and truck bodies.
Q460 - Q690 · T700
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Energy & Power
Large-diameter SSAW / JCOE pipe, transmission tower angle bar and solar mounting purlins.
OD 21.3 - 2020 mm
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Highway & Railway
Guardrail posts, bridge steelwork, station canopies and platform structures.
EN 10219 S355J2H · HDG
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Aerospace & Precision
Alloy and stainless precision tube with tight tolerance, full traceability and test reports.
Tolerance ±0.10 mm · MTC
Solution Details
Matched tube and section packages, application by application.
Sharp-corner RHS · R ≈ 0
01 / Architecture
Super High-Rise Buildings & Glass Curtain Walls
Our patented right-angle rectangular tube removes the 2t-3t corner radius of conventional cold-formed RHS. Panels, gaskets and structural silicone seat flush against a true 90° edge -- giving facade designers a continuous sight line and giving fabricators cleaner weld preparation.
- Recommended products
- Sharp-corner RHS · SHS · HDG tube
- Size range
- 20×20×1.2 - 500×500×20.0 mm
- Grades & standards
- Q235B / Q355B / S355J2 · EN 10219
- Flush glass and panel seating, no shadow gap
- Higher section modulus per kilogram of steel
- Cut-to-length, drilling and marking before shipment
3 production lines
02 / Equipment
Machinery Manufacturing
Machine frames, lifting booms, conveyor structures and agricultural equipment demand consistent wall thickness and straightness. Our seamless and welded hollow sections are produced to tight dimensional tolerance and verified in our in-house physical and chemical laboratory.
- Recommended products
- Seamless SHS/RHS · ERW round pipe
- Wall thickness
- 1.2 - 40.0 mm
- Grades & standards
- 20# / 45# / Q355B · ASTM A500
- Low MOQ on non-standard sections
- Batch-level mill test certificates
- Anti-rust oiling or primer coating on request
Q690 / T700 available
03 / Mobility
Automotive Industry
Lightweight, high-strength sections for truck chassis, semi-trailer main beams, tipper bodies and special-purpose vehicle frames. High-grade material lets designers reduce wall thickness without losing load capacity -- cutting tare weight and fuel consumption.
- Recommended products
- HSLA RHS · galvanized tube · C channel
- Grades
- Q460 / Q550 / Q690 / T700
- Processing
- Fixed-length cutting · bevelling · marking
- Weight reduction through higher-grade steel
- Stable mechanical properties heat by heat
- Serial production schedules for OEM programmes
OD up to 2020 mm
04 / Energy
Energy & Power Infrastructure
Piling and structural pipe for substations, SSAW and JCOE large-diameter pipe for fluid and structural service, angle bar for transmission towers, and cold-formed C purlins for solar mounting systems -- supplied with hot-dip galvanizing for long-term outdoor exposure.
- Recommended products
- SSAW / JCOE pipe · angle bar · C purlin
- Size range
- OD 219 - 2020 mm · L25 - L200
- Surface
- HDG 60-120 µm · 3PE on request
- Designated supplier for state-owned energy groups
- Project-based scheduling and staged delivery
- Third-party inspection accepted (SGS / BV)
EN 10219 S355J2H
05 / Infrastructure
Highway & Railway Engineering
Guardrail posts and rails, sign gantries, noise barrier frames, bridge secondary steelwork, station canopies and platform structures. Heavy-wall hollow sections and hot-rolled beams are delivered with impact-tested grades for cold-climate service.
- Recommended products
- H-beam · I-beam · U channel · HDG tube
- Size range
- 100×100 - 900×300 mm · U 50 - 400
- Grades & standards
- S355J2 / Q355B · EN 10210 · JIS G3466
- Charpy V-notch impact testing at -20 °C
- Heat-number traceability on every bundle
- Professional container and break-bulk loading
Tolerance ±0.10 mm
06 / Precision
Aerospace & High-Precision Equipment
Ground support structures, test rigs, tooling frames and precision assemblies where dimensional repeatability is critical. Stainless and alloy grades are available with full chemical and mechanical documentation, plus surface and straightness inspection on every lot.
- Recommended products
- Precision seamless tube · stainless SHS
- Grades
- Stainless & alloy grades · 20# / 45#
- Documentation
- EN 10204 3.1 MTC · dimensional report
- In-house physical and chemical laboratory
- Piece-level marking and packing lists
- Custom non-standard geometry development
Patented Technology
R ≥ 2t is the industry norm.
We build it at R ≈ 0.
SD XJY Pipe is the original inventor of sharp-corner rectangular steel tube in China, protected by 41 invention patents. The proprietary forming route holds a true right angle across the full wall-thickness range -- the geometry that makes flush curtain-wall framing and high-efficiency structural design possible.
Co-drafter of China's cold-formed steel industry standard (2018) · National high-tech enterprise with in-house physical and chemical laboratories.
Applicable product specifications
| Product family | Size range | Grades / standards | Main industries |
|---|---|---|---|
| Sharp-corner RHS Patented | 20×20×1.2 - 500×500×20.0 | Q235B / Q355B / S355J2 | Curtain wall, facade |
| Square & rectangular tube | WT 1.0 - 40.0 mm | EN 10219 · ASTM A500 Gr.A-D | Structures, machinery |
| Galvanized tube | 20×20 - 400×400 mm | HDG 60 - 120 µm | Highway, solar |
| Round steel pipe | OD 21.3 - 2020 mm | ERW · JCOE · SSAW · seamless | Energy, piling |
| H-beam & I-beam | 100×100 - 900×300 mm | Q355B / S355J2 | Bridges, plants |
| U & C channel | 50 - 400 mm | GB / EN / ASTM | Purlins, vehicles |
| Angle bar | 25×25×3 - 200×200×24 | Q235B / Q355B · HDG | Towers, framing |
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2,800+ specifications
Three production lines cover standard and non-standard sizes with low MOQ.
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Grades Q195 - Q690
Including T700, 20#, 45#, stainless and alloy grades on request.
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Full certification pack
ISO 9001:2015, Lloyd's CE, Singapore FPC, SGS and BV verification.
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Value-added processing
Cutting, bevelling, drilling, marking and export container loading.
Cases & Value
Verified on site by buyers from 50+ countries.
Factory audits, pre-shipment inspection and third-party witnessing are welcome at any time.
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Facade project · Middle East
Curtain wall mullions for a 180 m tower
1,450 t of sharp-corner RHS in 14 sizes, cut to length and marked per elevation, delivered in six staged shipments.
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Steel structure · Europe
Heavy-wall SHS for an industrial hall
S355J2H hollow sections up to 25 mm wall thickness, CE marked under EN 10219 with witnessed inspection.
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Solar mounting · Southeast Asia
Galvanized tube & C purlin package
Hot-dip galvanized sections at 80 µm coating, bundled per array and loaded for 40 HQ containers.
Why buyers standardise on SD XJY Pipe
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Patent-backed geometry
41 invention patents, including China's first sharp-corner rectangular tube.
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One-stop material list
Tube, pipe, beams, channels and angle bar consolidated in one shipment.
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Test before it leaves
In-house laboratory tests every heat; third-party inspection welcomed.
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Export-ready logistics
Professional bundling, container loading and complete customs documents.
Custom Solution Enquiry
Send your drawing or size list -- we reply with a matched solution in 12 hours.
Tell us the industry, the load case and the standard you work to. Our engineering team will propose the section, grade, surface treatment and packing plan, then quote against 2,800+ specifications including non-standard geometry.
- ISO 9001:2015
- Lloyd's CE
- EN 10210 / 10219
- Singapore FPC
- SGS verified
- BV verified
