Square/Rectangular Steel Pipe

Square and rectangular steel pipes, also known as square and rectangular hollow sections (SHS and RHS), are hollow structural steel sections manufactured in square or rectangular shapes. Their high strength-to-weight ratio, consistent dimensions and convenient fabrication characteristics make them widely used in construction, structural engineering, fabrication, machinery, solar structures and general industrial applications.

TEWOO supplies square and rectangular steel pipes through qualified manufacturing partners in China. We support international buyers with product sourcing, specification confirmation, technical communication, quality coordination, documentation and shipment arrangements according to project requirements.

Square & Rectangular Steel Pipe Specifications

Square and rectangular steel pipes can be supplied in different dimensions, wall thicknesses, steel grades, lengths and surface finishes according to applicable standards and customer requirements.

Typical specifications may include:

• Product Type: Square Steel Pipe / Rectangular Steel Pipe

• Square Pipe: 20 × 20 mm to 200 × 200 mm

• Rectangular Pipe: 20 × 40 mm to 100 × 200 mm

• Wall Thickness: According to product specification and application

• Length: Standard or customized lengths

• Steel Grade: Q195, Q235, Q355 and comparable grades where applicable

• Standards: ASTM, EN, BS and other applicable specifications

• Surface: Black, pre-galvanized, hot-dip galvanized or other options where applicable

• Ends: Plain or processed according to customer requirements

• Packaging: Bundles, steel-strip secured bundles and customer-specific packaging

Actual availability depends on the selected manufacturing partner, product specification and applicable standard.

Square Steel Pipe

Square steel pipe has four equal sides and a hollow cross-section, providing good structural strength and efficient use of material.

Square sections are commonly used for:

• Structural frames

• Columns and supports

• Fencing systems

• Solar structures

• Machinery frames

• Agricultural structures

• Furniture and fabrication

• General construction

Square steel pipes can be supplied in different dimensions and wall thicknesses according to structural requirements and applicable standards.

Rectangular Steel Pipe

Rectangular steel pipe has a rectangular hollow cross-section and provides flexibility where different width and height dimensions are required.

Rectangular sections are commonly used for:

• Building structures

• Steel frames

• Supports and beams

• Machinery structures

• Solar mounting structures

• Transportation equipment

• Agricultural structures

• General fabrication

The rectangular shape can provide practical advantages when space, load direction or structural design requires different section dimensions.

Common Steel Grades

Depending on the applicable standard and project requirements, square and rectangular steel pipes may be available in grades such as:

• Q195

• Q235

• Q355

• S235JR

• S355JR

• Other grades according to customer requirements

Steel grade availability and equivalency between different standards should be confirmed before quotation and order placement.

Standards for Square & Rectangular Steel Pipe

Square and rectangular steel pipes can be supplied according to different international standards depending on the product type, steel grade, dimensions and intended application.

Potential specifications may include:

ASTM

ASTM specifications for structural tubing and hollow sections where applicable.

EN

EN specifications such as EN 10219 for cold-formed welded structural hollow sections.

BS

Relevant British Standards according to the required product and application.

Other Specifications

Customer-specific, project-specific or other international standards can be reviewed according to technical requirements.

The applicable standard should always be confirmed before quotation and production.

Surface Options

Different surface treatments can be supplied according to the application and required corrosion protection.

Black Steel Pipe

Suitable for general structural and fabrication applications where additional corrosion protection is not required or will be applied separately.

Pre-Galvanized Steel Pipe

Suitable for applications requiring a galvanized surface with a relatively smooth and uniform finish.

Hot-Dip Galvanized Steel Pipe

Suitable for applications requiring enhanced corrosion protection, particularly for outdoor structures and other corrosion-sensitive environments.

Other surface treatments may be considered according to project requirements and manufacturing capability.

Length & Processing

Square and rectangular steel pipes can be supplied in standard or customized lengths according to customer requirements.

Possible processing options may include:

• Cut-to-length

• Drilling

• Punching

• Notching

• Welding

• Threading where applicable

• Customized end preparation

Processing availability depends on the product dimensions, wall thickness, drawings and manufacturing capability.

For customized products, buyers can provide drawings or technical specifications for review before quotation.

Applications of Square & Rectangular Steel Pipe

Square and rectangular steel pipes are widely used in structural and industrial applications.

Construction

Used for structural frames, columns, supports, roof structures and general building fabrication.

Steel Structures

Suitable for frameworks, supports, trusses and other fabricated steel structures.

Fencing

Used for fence posts, frames, gates and related structures.

Solar Structures

Used in selected solar mounting systems, support structures and related steel frameworks.

Machinery & Equipment

Used for machine frames, equipment supports and fabricated mechanical structures.

Furniture

Used for tables, frames, shelving, chairs and other steel furniture applications.

Agriculture

Used for greenhouse structures, agricultural equipment, livestock facilities and other fabricated structures.

General Fabrication

Suitable for a wide range of custom steel fabrication and engineering applications.

The appropriate section size, wall thickness and steel grade should be selected according to structural requirements, load conditions and applicable standards.

Advantages of Square & Rectangular Steel Pipe

Efficient Structural Design

The hollow section provides a practical combination of strength and material efficiency.

Good Fabrication Performance

Square and rectangular sections are suitable for cutting, welding, drilling and other fabrication processes when permitted by the applicable specification.

Dimensional Versatility

A wide range of section sizes and wall thicknesses allows buyers to select products according to structural and fabrication requirements.

Clean Geometric Shape

The uniform square or rectangular profile is convenient for assembling frames and connecting structural components.

Wide Application Range

Square and rectangular steel pipes can be used across construction, industrial, agricultural, solar, furniture and general fabrication applications.

Quality Control & Inspection

TEWOO coordinates quality requirements with selected manufacturing partners according to buyer specifications.

Depending on the order, inspection may include:

• Outside dimension inspection

• Wall thickness inspection

• Length inspection

• Squareness and straightness inspection

• Surface inspection

• Steel grade and material verification

• Weld seam inspection where applicable

• Mill Test Certificate (MTC) review

• Third-party inspection where required

Inspection requirements can be discussed and arranged according to product specifications, order requirements and buyer instructions.

Documentation

Depending on the product, applicable standard and order requirements, documentation may include:

• Mill Test Certificate (MTC)

• Commercial Invoice

• Packing List

• Certificate of Origin where applicable

• Inspection Certificate

• Shipping documents

• Product-specific documentation

Documentation availability should be confirmed during the quotation and order process.

Packaging & Shipment

Square and rectangular steel pipes are normally bundled and secured according to section dimensions, wall thickness, length, transportation requirements and customer instructions.

Packaging may include:

• Steel-strip secured bundles

• Protective packaging where required

• Pipe marking

• Customer-specific labels

• Container loading coordination

TEWOO can coordinate shipment arrangements and related documentation according to the agreed trade terms and order requirements.

Why Source Square & Rectangular Steel Pipe from China?

China has an extensive steel manufacturing and processing network, providing international buyers with a broad range of hollow section sizes, steel grades, standards and surface options.

TEWOO-ITD works with qualified manufacturing partners to identify suitable supply options according to the buyer's technical requirements, quantity, application and destination.

Our sourcing support can include specification clarification, supplier matching, quotation coordination, production follow-up, quality coordination, documentation and shipment arrangements.

Our goal is to make sourcing from China more efficient and transparent while helping buyers identify products that match their technical and commercial requirements.

Frequently Asked Questions

What is square steel pipe?

Square steel pipe is a hollow structural steel section with four equal sides. It is commonly used for structural frames, supports, fencing, machinery, furniture and general fabrication.

What is rectangular steel pipe?

Rectangular steel pipe is a hollow steel section with a rectangular cross-section. It is widely used in construction, structural fabrication, machinery, solar structures and other applications.

What is the difference between SHS and RHS?

SHS stands for Square Hollow Section, while RHS stands for Rectangular Hollow Section. SHS has equal width and height, while RHS has different width and height dimensions.

Can square and rectangular steel pipes be galvanized?

Yes. Depending on the product and manufacturing process, square and rectangular steel pipes can be supplied in black, pre-galvanized or hot-dip galvanized finishes.

Can you supply customized sizes?

Customized sizes may be available depending on the required dimensions, wall thickness, quantity and manufacturing capability. Buyers can send drawings or specifications for review.

What standards are available?

Depending on the product and application, square and rectangular steel pipes may be supplied according to ASTM, EN, BS and other applicable standards.

Can you provide MTC?

Mill Test Certificates can be provided or coordinated according to the product, applicable standard and order requirements.

What is the minimum order quantity?

MOQ depends on the required dimensions, steel grade, quantity, manufacturing partner and shipment arrangement. Please send your requirements for a specific quotation.

Request a Square & Rectangular Steel Pipe Quotation

Please send us your required section size, wall thickness, steel grade, standard, length, quantity and destination port.

If you do not have complete specifications, you can also send us drawings, photos, previous purchasing specifications or simply describe your application.

TEWOO-ITD of Xinhongsheng Metal will review your requirements and identify suitable square and rectangular steel pipe supply options from China.