About SD XJY Pipe · Since 2013
Twelve years of steel tube engineering, built on 41 invention patents.
Shandong Xin Jiyuan Special Steel Tube Co., Ltd operates SD XJY Pipe as its dedicated steel pipe and section steel division. We are the original inventor of sharp-corner (right-angle) rectangular steel tube in China -- today supplying 2,800+ specifications to construction groups, facade contractors, machinery builders and steel traders in more than 50 countries.
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41
Invention patents
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3
Production lines
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2,800+
Specifications
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50+
Export countries
Who We Are
A specialist mill, not a trading desk.
From our base in Shandong, China, we cold-form, weld, galvanize and finish square and rectangular hollow sections, round steel pipe and a complete range of section steel -- H-beam, I-beam, U and C channel and angle bar. Every heat is verified in our own physical and chemical laboratory before it leaves the yard.
Our patented sharp-corner rectangular tube fills a gap that existed in both the domestic and international market, giving architects and facade contractors a true right-angle profile for glass curtain walls and exposed steelwork.
- Legal entity
- Shandong Xin Jiyuan Special Steel Tube Co., Ltd
- Founded
- 2013 · Shandong, China
- Steel grades
- Q195-Q690 · S235JR-S355J2 · A500 Gr.A-D
- Wall thickness
- up to 40.0 mm
Our Journey
From one forming line in 2013 to a patented product family.
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2013
Company founded
Shandong Xin Jiyuan Special Steel Tube Co., Ltd is established with its first cold-forming line for welded square and rectangular tube.
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2015
Sharp-corner breakthrough
First right-angle (R≈0) rectangular hollow section successfully formed in China -- the first patent family of the technology is filed.
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2017
Second production line
Capacity expansion pushes the catalogue beyond 1,200 specifications and adds heavy-wall structural sections.
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2018
Industry standard co-drafted
Invited to participate in drafting China's cold-formed steel industry standards -- recognition of our forming technology.
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2019
National high-tech enterprise
Certified as a national high-tech enterprise; in-house physical and chemical laboratory is commissioned.
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2021
Third line · 40 mm wall
Heavy-wall line reaches 40.0 mm wall thickness; total coverage grows to 2,800+ specifications including non-standard sizes.
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2023
Global certification set
ISO 9001:2015, Lloyd's CE (EN 10210 / 10219) and Singapore FPC completed; exports reach more than 50 countries.
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2024 -- today
41 patents · SD XJY Pipe
The patent portfolio reaches 41 inventions, and SD XJY Pipe is launched as our dedicated export division for pipe and section steel.
Core Technology
41 invention patents behind one right angle -- R ≈ 0.
Conventional cold-formed RHS carries a corner radius of two to three times the wall thickness. Our proprietary forming route holds a true 90° edge across the full thickness range, filling a gap that existed in both the domestic and the international market for architectural steelwork.
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Corner radius
R ≈ 0.2 mm
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Size range
20×20 - 500×500
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Grades
Q235B / Q355B / S355J2
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Standards
EN 10219 · A500
Applications: glass curtain walls · architectural facades · high-end steel structures
Section comparison
Manufacturing Strength
Three production lines. 2,800+ specifications. Everything tested in-house.
Welded · seamless · galvanized
square, rectangular, round & section steel
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3 production lines
Sharp-corner forming, standard SHS/RHS and heavy-wall structural lines running in parallel.
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2,800+ specifications
Full standard coverage plus custom non-standard sizes with low MOQ and cut-to-length service.
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Wall thickness ≤ 40 mm
Heavy sections for bridges, industrial plants and high-load steel structure fabrication.
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In-house laboratory
Physical and chemical testing of every heat, with mill test certificates issued per shipment.
Qualifications & Honours
Certified for the markets our customers build in.
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Quality system
ISO 9001:2015
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European market
Lloyd's CE · EN 10210 / 10219
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Singapore
FPC certification
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Third-party audit
SGS · BV verified
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National title
High-tech enterprise
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2018
Cold-formed steel standard drafter
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ISO 9001:2015
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Lloyd's CE
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Singapore FPC
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Invention patent
Customers & Exhibitions
Buyers from 50+ countries walk our lines every year.
Construction groups, facade contractors, machinery builders, steel structure fabricators and distributors across the EU, North America, the Middle East and Southeast Asia.
Vision & Philosophy
Make the sharp corner the world's new standard.
We believe a steel section should serve the design, not compromise it. Every patent we file, every line we commission and every certificate we earn exists for one purpose: to give engineers a tube they can specify with confidence anywhere in the world.
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Mission
Fill the gaps others leave
Develop sections the market needs but cannot buy -- starting with China's first right-angle rectangular tube.
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Vision
A global reference mill
To be the first name specified for sharp-corner and heavy-wall hollow sections in architectural steelwork.
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Values
Tolerance is a promise
Documented heats, honest dimensions, mill test certificates -- no exceptions, from one bundle to one thousand tonnes.
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Service
Built around your list
Custom sizes, cutting, marking, packing and professional container loading for every export order.
