What Is a Rectangular Hollow Section?
A Rectangular Hollow Section (RHS) is a hollow steel section with a rectangular cross-section, commonly used in structural and fabrication applications. Compared with other hollow sections, RHS provides flat surfaces that are convenient for connections, welding, and frame construction.
RHS vs. SHS vs. CHS
| Section | Shape | Typical Use |
| RHS | Rectangular | Beams, columns, frames |
| SHS | Square | Columns, frames |
| CHS | Circular | Columns, structural supports |
RHS = Rectangular Hollow Section. Depending on the market, it may also be referred to as a rectangular steel tube or rectangular hollow section steel pipe.
How to Compare Rectangular Hollow Section Pipe Manufacturers in China
| Comparison Factor | What Buyers Should Check |
| Manufacturing capability | ERW production, forming and sizing |
| Product range | RHS sizes, wall thickness and lengths |
| Steel grades | Q235/Q355, S235/S355, ASTM grades |
| Standards | GB, EN, ASTM, JIS |
| Surface treatment | Black, galvanized, painted |
| Quality control | Weld, dimensional and mechanical testing |
| Customization | Non-standard sizes and project requirements |
| Production capacity | Annual output and delivery capability |
| Export experience | International projects and documentation |
| One-stop supply | Pipe manufacturing + coating + inspection |
Top Rectangular Hollow Section Pipe Manufacturers in China
China has a large number of rectangular hollow section (RHS) manufacturers, but their capabilities are not identical. Buyers should compare not only RHS specifications and prices, but also manufacturing processes, applicable standards, size range, surface treatment, quality control, and the ability to supply other steel pipe products for the same project.
The following manufacturers represent different strengths in the Chinese RHS market.
Shandong XJY Pipe specializes in square and rectangular hollow sections, offering welded, galvanized and seamless products. Its RHS range covers multiple sizes and wall thicknesses, with products available to standards including EN 10219, ASTM A500 and JIS.
Tianjin Youfa is a large Chinese steel pipe manufacturer offering rectangular hollow sections produced mainly by ERW. Its RHS products are available in standards such as ASTM A500, EN 10219, EN 10210, JIS G3466 and GB/T 6728, with galvanized and other surface options.
Hebei Allland Steel Pipe Manufacturing Co., Ltd. is a China-based steel pipe manufacturer offering rectangular and square hollow sections alongside a broader range of ERW, LSAW, SSAW and seamless steel pipes.
Its structural pipe range includes square and rectangular sections, with products available to standards such as ASTM A500, EN 10219, JIS G3466, GB/T 6728 and AS/NZS 1163. ALLLAND also provides surface treatments including hot-dip galvanizing, primer and other protective coatings.
Rectangular Hollow Section Manufacturer Comparison
The following table compares three China-based RHS manufacturers across product range, applicable standards, manufacturing capabilities, and project supply options.
| Comparison Factor | Shandong XJY Pipe | Tianjin Youfa | ALLLAND |
| RHS Manufacturing | ✓ | ✓ | ✓ |
| RHS Size Range | Multiple sizes | Up to 300 × 500 mm | Up to 500 × 300 mm |
| Wall Thickness | Up to 40 mm | Up to 30 mm | Up to 25 mm |
| EN 10219 | ✓ | ✓ | ✓ |
| EN 10210 | ✓ | ✓ | ✓ |
| ASTM A500 | ✓ | ✓ | ✓ |
| JIS Standards | ✓ | ✓ | ✓ |
| Galvanized RHS | ✓ | ✓ | ✓ |
| Other Steel Pipe Products | Mainly structural sections | Broad steel pipe range | ERW / LSAW / SSAW / SMLS |
| Pipe Coating Capability | Available | Available | 3PE / 3LPE / FBE / HDG |
| Custom Specifications | ✓ | ✓ | ✓ |
| One-Stop Project Supply | △ | ✓ | ✓ |
RHS Size and Wall Thickness
RHS dimensions vary between manufacturers, so buyers should compare more than the maximum section size.
For example, ALLLAND’s structural pipe range covers square and rectangular sections, with customizable lengths and multiple international standards.
Its structural pipe product page lists square/rectangular sections from 20 × 20 mm to 500 × 500 mm and wall thicknesses from 1.0 to 50 mm across its broader structural pipe range.
For an RHS purchase, the important parameters include:
| Parameter | What Buyers Should Check |
| Section Size | Width × height |
| Wall Thickness | Required structural capacity |
| Length | Standard or project-specific |
| Steel Grade | Yield and tensile requirements |
| Standard | EN, ASTM, JIS, GB, etc. |
| Surface | Black, galvanized or coated |
| End Treatment | Plain, beveled or customized |
Maximum dimensions alone should not be used to rank suppliers. The actual requirement should be matched against the manufacturer’s available production process, steel grade and applicable standard.
Why ALLLAND Stands Out Among China RHS Suppliers
ALLLAND differs from suppliers focused primarily on rectangular hollow sections through its broader steel pipe manufacturing and coating capabilities. The main differences are in product coverage, production processes, coating options, and project supply.
Multiple Manufacturing Processes for RHS Pipe
ALLLAND manufactures RHS, ERW, LSAW and SSAW steel pipes, supporting projects with multiple pipe requirements.
Integrated Coating Options for RHS
Available coating solutions include 3PE, 3LPE, 3LPP, FBE and galvanized coatings, alongside pipe manufacturing.
Black RHS vs. Galvanized RHS
| Factor | Black RHS | Galvanized RHS |
| Corrosion resistance | Limited | Higher |
| Outdoor use | △ | ✓ |
| Maintenance | Higher | Lower |
| Cost | Lower | Higher |
ALLLAND’s structural pipe offering includes hot-dip galvanized, primer-coated, pre-painted and sandblasted surface options.
International Standards for RHS Pipe
RHS products can be supplied to EN 10219, EN 10210, ASTM A500 and GOST requirements, with customized specifications available.
| Standard | Common Grades | Typical Application |
| ASTM A500 | Grade B, C | Structural applications |
| EN 10219 | S235, S275, S355 | Structural hollow sections |
| EN 10210 | S235, S275, S355 | Hot-finished sections |
| JIS G3466 | STKR grades | Structural applications |
| GB/T 6728 | Q235, Q355 | Structural applications |
Quality Control for Rectangular Hollow Sections
ALLLAND provides dimensional, mechanical, chemical and weld inspection, with MTC and third-party inspection available for applicable orders.
Which China RHS Manufacturer Is Best for Your Project?
The best RHS manufacturer depends on your project specifications, required standards, surface treatment, and overall pipe requirements. Instead of comparing suppliers by price alone, buyers should match their requirements with each manufacturer’s production and supply capabilities.
| Project Requirement | What to Prioritize |
| Standard RHS sourcing | Size, wall thickness, steel grade and price |
| Galvanized RHS | Galvanizing specification and surface quality |
| Structural projects | Mechanical properties and dimensional control |
| Multiple pipe specifications | Product range and manufacturing capability |
| EPC or infrastructure projects | Manufacturing, coating, inspection and documentation |
For projects requiring RHS together with ERW, LSAW, SSAW or seamless steel pipes, a manufacturer with broader production and coating capabilities can simplify procurement and project coordination.
ALLLAND’s combination of RHS manufacturing, multiple steel pipe processes, coating options and quality inspection makes it suitable for projects requiring more than standard RHS supply.
FAQ
What is the difference between RHS and SHS?
RHS has a rectangular cross-section, while SHS has a square cross-section. Both are commonly used as structural hollow sections, but their dimensions and applications differ.
Which standards are commonly used for RHS?
Common RHS standards include ASTM A500, EN 10219, EN 10210, JIS G3466 and GB/T 6728. The applicable standard depends on the project, market and required mechanical properties.
Can RHS be galvanized?
Yes. RHS can be supplied with hot-dip galvanized surfaces for applications requiring additional corrosion protection, particularly in outdoor or exposed environments.
