ALLLAND Boiler Steel Pipe Supply
Hello, welcome to Orland Steel Pipe Manufacturing Company. We produce various types of HSS steel pipes, including round, rectangular, and square hollow structural sections. Our manufacturing process utilizes high-frequency electric welding technology and strictly adheres to international standards, ensuring precise control over wall thickness, outer diameter, and length. All tolerances fall within standard ranges, so you can purchase with confidence.
Alllandsteel is a steel pipe manufacturer based in China with 25 years of experience. The facility spans 22,000 square meters, represents a RMB 700 million investment, and operates four production lines (JCOE, ERW, SMLS, SSAW) alongside five coating lines. With an annual production capacity of 250,000 tons, the factory covers specifications ranging from Ø406 to Ø1524 and holds multiple international certifications (API/ASTM/EN/ISO/JIS). Focused on steel pipes, creating value for you!
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Hollow Section refers to structural steel with a closed cross-section, featuring a hollow interior and regular external shape. Common types include Square Hollow Section (SHS), Rectangular Hollow Section (RHS), and Circular Hollow Section (CHS). Their primary function is to bear loads and provide structural support, rather than solely transporting fluids. Unlike open-section steel (such as I-beams or channel sections), Hollow Sections offer a higher strength-to-weight ratio and more stable load-bearing performance.
ALLLAND’s Hollow Section specifications, dimensional ranges, and standards are listed below. Please contact us for inquiries.
O.D.:
SHS: 20 × 20 mm ～ 400 × 400 mm
RHS: 40 × 20 mm ～ 500 × 300 mm
CHS: 21.3 mm ～ 610 mm
W.T.:
1.2 mm to 25.0 mm, Common Specifications, Most commonly used W.T.: 2.0, 2.5, 3.0, 4.0 mm
Length:
6-12 m, Common Dimensions: 3 m to 18 m, Customizable
Process:
ERW/ Cold Forming/ Hot Forming
Standards:
EN 10210 / EN 10219 / ASTM A500 / JIS G3466 , Common standards.
Steel Grades:
S235JR / S275JR / S355JR / Grade B / Grade C / STKR400 / STKR490
Surface Treatment:
Black pipe, galvanized, painted, rustproof treatment
Tube Ends:
Plain ends, chamfered ends, burr-free ends
Based on load-bearing capacity, hollow sections can be categorized into three main types: SHS, RHS, and CHS. Their differing shapes result in varying degrees of stress uniformity and suit different application environments. Below is a brief introduction to hollow sections based on these three shapes.
| Item | Square Hollow Section (SHS) | Rectangular Hollow Section (RHS) | Circular Hollow Section (CHS) |
| Cross-sectional Shape | Square | Rectangle | Circular |
| Typical Size Range | 20 × 20 mm – 400 × 400 mm | 40 × 20 mm – 500 × 300 mm | Outer Diameter 21.3 mm – 610 mm |
| Wall Thickness Range | 1.2 mm – 25 mm | 1.2 mm – 25 mm | 1.2 mm – 25 mm |
| Bending Performance | High, uniform load distribution | High (better along the long side) | Medium, uniform curvature |
| Torsional Performance | High | Medium | High, excellent torsional resistance |
| Axial Compression Performance | High | High (better in one direction) | High, best for axial compression |
| Construction & Installation Convenience | High | High | Medium |
| Aesthetic Appearance | High, symmetrical and neat | Medium, asymmetrical | High, visually appealing |
| Typical Applications | Building columns, structural frames, decorative structures | Beams, platforms, industrial buildings, machinery frames | Bridges, towers, solar mounting structures, pile foundations |
| Standards | EN 10210 / EN 10219 / ASTM A500 / JIS G3466 | EN 10210 / EN 10219 / ASTM A500 / JIS G3466 | EN 10210 / EN 10219 / ASTM A500 / JIS G3466 |
| Manufacturing Process | Cold-formed / Hot-finished / ERW welded | Cold-formed / Hot-finished / ERW welded | Cold-formed / Hot-finished / ERW welded |
| Available Steel Grades | S235 / S275 / S355 / ASTM A500 B/C / STKR400 | S235 / S275 / S355 / ASTM A500 B/C / STKR400 | S235 / S275 / S355 / ASTM A500 B/C / STKR400 |
| Surface Treatment Options | Black / Hot-dip galvanized / Pre-galvanized / Oiled / Painted | Black / Hot-dip galvanized / Pre-galvanized / Oiled / Painted | Black / Hot-dip galvanized / Pre-galvanized / Oiled / Painted |
| Pipe End Finish | Plain End / Cut End / Beveled End | Plain End / Cut End / Beveled End | Plain End / Cut End / Beveled End |
| Applicable Design Scenarios | Symmetrical load-bearing, building columns, interior/exterior decorative structures | Unidirectional bending, beams, platform frames | Torsion-bearing structures, bridge columns, tower supports, solar installation |
European Standard: Hot-formed – EN 10210; Cold-formed – EN 10219
Steel Grade: S235JR, S275JR, S355JRH
American Standard: ASTM A500; ASTM A1085 (High-Performance Steel)
Steel Grades: Grade B/C
Japanese Standard: JIS G3466
Steel Grades: STKR400/STKR490
Below are details on the applications of our company’s Hollow Sections. Users with specific requirements may click to request a quote.
Bridges and Infrastructure
Hollow Sections are extensively used in bridge construction. Their excellent compressive strength and torsional resistance effectively bear wind loads and traffic pressures. They deliver superior performance when paired with reinforced concrete materials.
Photovoltaic Mounting Systems
Hollow Sections are the preferred material for photovoltaic and solar mounting systems. Their lightweight, corrosion-resistant properties make them ideal for outdoor environments.
Mechanical Equipment Supports
With stable structural integrity and ease of welding/cutting, Hollow Sections hold a significant place in mechanical engineering. Different cross-section materials are selected based on specific application scenarios.
Building Steel Structures
Hollow Sections offer excellent seismic resistance, making them highly suitable for building support structures and beams. Their aesthetic appeal is also favored by major construction companies.
