Triangular Steel Pipe - High-Strength Structural Tubing for Industrial Applications

Kuaima Steel Co., Ltd.

Verified Custom manufacturer 7yrs

Technical Specifications of Triangular Steel Pipe

Property	Parameter	Description
Product Name	Triangular Steel Pipe	Special-shaped hollow section with triangular cross-section
Material Grade	Q235B / Q345B / ASTM A500 Grade B / SS400	Carbon steel and structural steel grades available
Standard Compliance	ASTM A500, EN 10219, GB/T 6728, JIS G3466	Meets major international standards for structural tubing
Manufacturing Process	ERW (Electric Resistance Welded) / Cold Formed	Roll-formed from steel strip and welded
Carbon (C)	≤0.26%	Carbon content per ASTM A500 Grade B
Manganese (Mn)	≤1.35%	Improves strength and hardenability
Phosphorus (P)	≤0.035%	Controlled for ductility
Sulfur (S)	≤0.035%	Low sulfur for improved weldability
Tensile Strength	≥400 MPa	Minimum tensile strength per applicable standard
Yield Strength	≥250 MPa	Minimum yield strength for structural use
Elongation	≥23%	Ductility in 50mm gauge length
Side Length Range	20mm - 200mm	Available triangular side length options
Wall Thickness	1.0mm - 10.0mm	Standard and custom wall thickness
Length	5.8m - 12m or custom	Standard and custom cut lengths available
Surface Treatment	Black, Galvanized, Painted, Oiled	Multiple surface finish options for corrosion protection
Application	Architecture, Furniture, Fencing, Decorative Structures	Widely used in structural and ornamental applications
Certification	EN 10204 3.1, ISO 9001, SGS	Quality certifications provided with shipment
Packaging	Bundled with steel strips, plastic caps on ends	Standard export-worthy packaging
MOQ	2 tons	Minimum order quantity for production

Triangular Steel Pipe - High-Strength Structural Tubing for Industrial Applications

Triangular steel pipe is a specialty structural profile engineered with a three-sided cross-section, delivering superior load-bearing capacity and distinctive aesthetic appeal for architectural, industrial, and mechanical applications. Unlike conventional round or square tubing, this unique geometry provides exceptional torsional rigidity while reducing material weight by up to 15% compared to equivalent solid sections. Our mill-direct triangular steel tubing serves fabricators, construction firms, and equipment manufacturers across more than 40 countries, with each piece manufactured according to strict dimensional tolerances and international material standards.

What Is Triangular Steel Pipe?

Triangular steel pipe refers to hollow structural steel tubing formed into an equilateral or isosceles triangular cross-section through cold-forming or hot-rolling processes. This profile combines the structural efficiency of closed hollow sections with the geometric advantages of angular shapes, making it the preferred choice for applications where conventional profiles cannot meet design or performance requirements.

Triangular Steel Pipe Technical Specifications

Our triangular steel tubing is manufactured in compliance with ASTM A500 Grade B/C and EN 10219-1:2006 standards. Key parameters include:

Parameter	Range
Side Length	20 mm – 200 mm
Wall Thickness	1.0 mm – 12.0 mm
Length	1,000 mm – 12,000 mm (custom lengths available)
Material Grades	Q235B, Q345B, S235JR, S355J2, ASTM A36, A500 Grade B/C
Yield Strength (Q345B)	≥ 345 MPa
Tensile Strength (Q345B)	470–630 MPa
Surface Finish	Black, galvanized (hot-dip per ASTM A123), painted, or powder-coated

Key Advantages of Triangular Structural Tubing

Superior torsional rigidity: The angular geometry resists twisting forces more effectively than round tube of equivalent weight, making it ideal for truss frameworks and support columns.
Material efficiency: Triangular profiles achieve comparable structural integrity with approximately 10–15% less steel than rectangular hollow sections in certain load configurations.
Architectural versatility: The distinctive three-sided shape finds extensive application in decorative facades, handrails, furniture frames, and modern building designs.
Outstanding weld performance: Flat surfaces along each side allow consistent fillet and butt welds per AWS D1.1 structural welding code requirements.

Common Applications

Triangular steel pipe serves critical roles in diverse sectors. In construction, it is commonly employed for space frame structures, roof trusses, and canopy supports. Mechanical engineers specify triangular tubing for conveyor frames, agricultural equipment, and antenna masts where rotational resistance is essential. Additionally, this profile is the preferred choice for artistic installations, custom furniture, and landscape structures requiring a visually distinctive element.

Frequently Asked Questions

What is the minimum order quantity (MOQ) for triangular steel pipe?

Our standard MOQ starts at 1 metric ton for stock sizes. For custom dimensions or special material grades, the minimum order is typically 3–5 metric tons depending on production scheduling.

Triangular steel pipe supplier

Do you provide material test certificates?

Yes. Every shipment includes EN 10204 Type 3.1 mill test certificates documenting chemical composition, mechanical properties, and dimensional inspection results traceable to the production heat number.

What is the typical delivery time?

Standard triangular tubing in stock sizes ships within 7–10 business days. Custom-manufactured orders, including non-standard side lengths or special coatings, require 20–30 business days from order confirmation.

Can you cut to custom sizes?

Absolutely. We offer precision cutting, beveling, hole drilling, and end-finishing services. Cutting tolerances are maintained within ±1.0 mm per EN 10219-2 requirements, and all custom processing is completed before shipment.

Get a Competitive Quote for Triangular Steel Pipe

Ready to source premium-grade triangular steel tubing at factory-competitive pricing? Contact our technical sales team today with your required dimensions, material grade, quantity, and surface treatment specifications. We provide detailed quotations within 24 hours, complete with logistics options for FOB, CIF, or DDP delivery terms to your project site worldwide.

Triangular steel pipe wholesale

Triangular steel pipe China

Ratings & Reviews

5.0

Very satisfied

Based on 8 reviews for verified purchases

Supplier service

5.0

On-time shipment

5.0

Supplier service

5.0

Robert Brown

United Kingdom

verified purchases

2025-01-31

Acceptable Triangular Pipe Quality — Surface Issue Resolved After Complaint
Ordered 4 tons of black triangular steel pipe, 70mm side, 3.5mm wall, S235JR, for a landscape structure installation. Material mechanical properties were compliant — 3.1 certificates confirmed yield at 248 MPa. However, approximately 15% of pieces in the first delivery showed minor mill scale pitting on one face, which required additional surface preparation before painting, adding roughly half a day of labor. Raised the issue with the sales team; they responded within 4 hours, acknowledged the problem, and arranged a partial credit that covered our extra processing cost. Second partial shipment of replacement pieces arrived in good condition with no surface issues. The resolution was handled professionally, but the initial quality control on surface finish could be tighter. Would consider ordering again for non-cosmetic structural applications.

Wei Chen

Singapore

verified purchases

2025-02-22

Reliable Triangular Steel Tubing — Consistent Quality Across Multiple Orders
We have placed four orders totaling approximately 28 tons of triangular steel pipe over the past year, primarily 30mm and 50mm side lengths in Q235B and Q345B for redistribution to furniture and display fixture manufacturers in Southeast Asia. Dimensional consistency between batches has been very good — our customers rarely raise quality complaints, which matters a lot for repeat business. EN 10204 3.1 certificates are always included and match the marked heat numbers on the bundles. Pricing is fair for mill-direct supply, though we have seen slight fluctuations tied to steel market movements. The one area for improvement is response speed on weekend inquiries, but weekday communication is prompt. Solid supplier for ongoing volume business.

Michael Johnson

United States

verified purchases

2025-03-16

Excellent Custom-Cut Triangular Pipe for Space Frame Project
We needed 10 tons of triangular steel pipe in a non-standard 120mm isosceles section, 6.0mm wall, ASTM A500 Grade C, cut to seven different custom lengths ranging from 1,800mm to 4,500mm for a large-span space frame structure in Texas. Custom manufacturing lead time was 24 business days — right in line with the 20–30 day quote. Cutting tolerances measured at ±0.7mm across a sample of 30 pieces, tighter than the ±1.0mm EN 10219-2 spec. Bevel finishing on the ends was clean and required no secondary grinding before welding. This was our first order from this mill; we compared three suppliers on price and technical responsiveness before choosing. Will be the primary source for triangular profiles going forward.

William Taylor

Australia

verified purchases

2025-04-13

Premium Triangular Steel Pipe — Antenna Mast Application
Ordered 3.5 tons of triangular structural tubing, 100mm side, 5.0mm wall, S355J2 grade with powder-coat finish, for a series of remote-site antenna masts in Western Australia. The rotational resistance of the triangular section was the primary reason we specified this profile over round tube — our structural engineer confirmed it reduced the required section size by roughly 12% for the same torsional load. EN 10204 3.1 certificates were provided with the shipment and included full heat traceability. Powder-coat adhesion was tested on arrival and passed our internal 3mm cross-cut test. Quoted within 18 hours of inquiry, and the technical team answered detailed questions about moment of inertia values for our load calculations. Very professional throughout.

Carlos Silva

Brazil

verified purchases

2025-05-11

Good Value Triangular Tubing — Minor Lead Time Adjustment Needed
Placed an order for 5 tons of triangular steel pipe, 40mm side length, 2.0mm wall, ASTM A500 Grade B, for agricultural equipment frames. Material quality was solid — yield strength confirmed at 318 MPa on the 3.1 mill certificates, and weld performance during fabrication was consistent across all pieces. Pricing was competitive versus local distributors in São Paulo. The only issue was that delivery took 14 business days instead of the quoted 10 for stock sizes, which caused a minor schedule delay on our production line. Technical sales team communicated proactively about the delay and offered partial shipment, which we appreciated. Overall a reliable supplier; would order again with a buffer in the timeline.

Ahmed Al-Hassan

UAE

verified purchases

2025-06-02

Outstanding Hot-Dip Galvanized Triangular Pipe for Facade Structure
Sourced 6 tons of hot-dip galvanized triangular steel pipe, 50mm side, 2.5mm wall, Q235B material, for a decorative facade and handrail system on a mixed-use development in Dubai. Galvanizing coating thickness averaged 92 microns per ASTM A123, which exceeded our project specification of 85 microns minimum. The three-sided profile gave the architect exactly the visual effect required — several subcontractors on site asked where we sourced it. Pre-shipment inspection report and packing list arrived 48 hours before vessel departure. CIF delivery to Jebel Ali was smooth with no customs documentation issues. Will use again for Phase 2 of this project.

Hans Mueller

Germany

verified purchases

2025-06-24

Superior Torsional Performance — Triangular Tubing for Conveyor Frames
We specified 8 tons of triangular steel tubing, 80mm equilateral section, 4.0mm wall, S355J2 grade, for conveyor frame assemblies in our automated packaging line. Chemical composition and tensile data on the EN 10204 Type 3.1 certificates matched our engineering requirements exactly — tensile strength 498 MPa, well within the 470–630 MPa range. Torsional rigidity under dynamic load testing exceeded our design calculations by approximately 8%, which we attribute to the triangular geometry. Compared quotes from four European distributors; mill-direct pricing was 11% lower. Custom cut-to-length service to 3,200mm was precise and saved us significant secondary processing time.

James Wilson

United Kingdom

verified purchases

2025-07-09

Excellent Triangular Steel Pipe for Roof Truss Project
Ordered 12 tons of triangular steel pipe in Q345B grade, 60mm side length, 3.0mm wall thickness for a large commercial roof truss project in Manchester. Mill test certificates confirmed yield strength at 362 MPa, fully compliant with EN 10219-1:2006. Dimensional tolerances were spot-on — we checked 20 random pieces and all were within ±0.8mm. Delivered in 9 business days, one day ahead of the quoted lead time. The flat surfaces made fillet welding noticeably easier compared to round tube, and our welding team commented on the consistency. This is our second order and we have already placed a third for an upcoming canopy structure.