Triangular Steel Pipes represent our innovative line of three-sided seamless tubes featuring precision equilateral triangular cross-sections. These geometric-profile pipes are manufactured through advanced cold-drawing technology that transforms conventional round steel billets into high-precision triangular configurations, maintaining the inherent strength
The distinct three-corner design provides superior directional rigidity and enhanced torsional resistance, making these triangular hollow sections particularly valuable in applications requiring precise angular positioning and rotational stability. Unlike conventional circular profiles or rectangular tubes, our triangular seamless pipes deliver optimized load distribution along their three structural planes, offering maximum resistance to deformation forces and mechanical stress in specific directional applications.
These precision triangular tubes excel in mechanical equipment manufacturing as machine tool guide rails, positioning system components, and automation equipment shafts where their defined edges ensure accurate alignment and prevent rotational slippage. The inherent structural stability of the three-sided configuration also makes them ideal for transportation applications including agricultural machinery connectors, spreader system components, and lightweight vehicle frameworks where space optimization and weight reduction are critical requirements.
The geometric efficiency of our triangular steel pipes provides natural structural advantages that surpass both circular tubes and rectangular profiles in specific loading conditions. Their three-cornered design enables simplified assembly processes and secure mounting solutions while offering distinctive aesthetic appeal for architectural applications and design-forward projects requiring unique visual impact alongside functional performance.
Technical Advantages:
◆Triangular structural integrity ensures superior directional stability
◆Precision edges facilitate accurate positioning and assembly
◆Enhanced torsional resistance compared to circular profiles
◆Optimized weight-to-strength ratio for lightweight applications
◆Distinctive geometric appearance for design differentiation
Tenjan custom triangular tubes are available in various material specifications including carbon steel and alloy steel compositions, with comprehensive compliance to international standards including ASTM, EN, and JIS specifications. Backed by our technical expertise in special-shaped tube manufacturing, we provide application-specific solutions and engineering support to ensure optimal performance in your unique operational environment.
Custom Sizes OD10-108mm-ASTM/EN/DIN/JIS/GOST Certified -Small-Batch Friendly
| Parameter | Key Features |
| Outer Diameter | 10-108mm (0.39″-4.25″) • Fully customizable |
| Wall Thickness | 1-20mm (0.039″-0.79″) • ±0.1mm precision tolerance |
| Material | Carbon Steel • Alloy Steel • Special grades available |
| Process | Cold Drawn Cold Rolled for superior finish |
| Standard | Typical Grades We Supply |
|
GB |
DT4,Y15,10#,20#,20G,Q235,25Mn,35#,45#,55# 16Mn,Q345B(Q355B),Q345C(Q355C),Q345D(Q355D),Q345E(Q355E),Q420,Q460,20Cr,40Cr, 15CrMo,20CrMo,30CrMo,35CrMo,42CrMo,20CrNiMo,40CrNiMo,20CrMnTi,20Mn2,40Mn2,40MnB,35MnB, 35Mn15CrMn,20CrMn,20CrMnMo,38CrMoAL,36Mn2V,38Mn2V,40MnMoV,15Mo3,16Mo3,31CrMoV9 |
|
ASTM |
1215,1008,1010,1020,A105,A106 Gr.B,A36,1026,1035,1045,1055,SA179,SA192 Gr·50,Gr·55,Gr·65,5120,5140,4130,4135,4140,8620,4340,SAE 5120,1524,1340,15B41,SAE5115,SAE 5120,SCM23 |
| EN | DC01,11SMn30,P235TR1,P195GH,P265TR2,E235 E355,ST52,S355JR,S355JO,S355J2,S355NL,S420N,S420NL,S460NL,20Cr4, 41Cr4,13CrMo4-5,20CrMo4,25CrMo4,34CrMo4,42CrMo4,20NiCrMo2,34CrNiMo6,20MnCr5, 22Mn6,42Mn6,42MnB4,34MnB5,37Mn5,16MnCr5,20CrMo5. |
| JIS | SUM22,S10C,STKM11A,STPT370,STB35,S20C,STKM12,STKM13,STPT410,STB42,SS400,S35C,S45C,S55C SCr22,SCr440,SCM415,SCM420,SCM430,SCM435,SCM440, SNCM220,SNCM439,SMnC420H,SMn420,SMn438, SMnC420H |
| DIN | DC01,11SMn30,CK10,C10,ST35.8,C20,CK20,ST45.8,St37,S235JR,C26D,CK35,CK45,CK55 |
| GOST |
08КП,10,20,Ст3сп,25,35,45,5515Г2, 09Г2C/10Г2C1,15Г2,14Г2С,C355,20Х,40X,15XM,20ХМ,30ХМ,35ХМ,38ХМ,20ХНМ,40ХНМ,20ХГТ,20Г2,40Г2,18ХГ,20ХГМ |
| Other Speical Grades can be customized | |
| Industry | Key Applications Parts | Relevant Standards | Our Advantages |
| General Structural | Square Rectangular Tubes | GB/T 3094,ASTM A500, EN 10210 |
Good Surface,lightweight,precision dimensions (±0.1mm) |
| Automotive and Motorcycle Component | Shock Absorbers，Steering Systems，Thrust Rods | EN 10305-1,JIS G3445, DIN 2391,ASTM A519 |
High fatigue strength,High yield strength,lightweight, precision dimensions (±0.1mm) |
| Engineering and Mining Support | Anchor Bolts,Support Pipes,Hydraulic Props | ASTM A519,DIN 2391, JIS G3441,EN 10297-1, ISO 10799 |
High Strength Yield Strength High Elongation Customization Service – Special steel grades, dimensions and surface treatments available according to project requirements |
| Construction Machinery | Drive shaft sleeves,Gearbox Guide Tubes,Crane Boom Guide Tubes,Excavator Arm Tubes,Loader Frame Tubes,Arctic Low-Temperature Tubes | ASTM A519,DIN 2391, JIS G3445,EN 10210-1, GOST 8733, ASTM A106,ISO 9329 |
ID/OD tolerances of ±0.05mm. Wall thickness uniformity straightness ≤0.5mm/m |
| Fluid Transport Systems | Oil/Gas pipelines,chemical systems,Power/Energy | ASTM A106 Gr.B, EN 10216-2,GOST 8734 |
Eddy Current + Ultrasonic Testing,Hydrostatic Testing |
| High-Pressure Boilers | Superheaters,Steam lines,Reheaters,Economizers) | ASTM A192,DIN 17175, EN 10216, JIS G3461/G3462 |
Enhanced material density through cold-drawing/rolling ensures long-term stability Full Compliance with Int’l Standards,Superior Creep Fatigue Resistance |
| Geological Drilling | Drill Pipe,Tubing | ASTM A519,API 5DP, EN 10208-2 |
High Strength Wear Resistance precision Dimensions Impact Fatigue Resistance |
| Agricultural Machinery | Hydraulic cylinders,drive shafts,Lift arms,steering housings,Boom frames | ASTM A519,EN 10210-1, DIN 2391,GOST 8733, JIS G3445 |
Material Advantages:High Strength Lightweight,Precision Cold-Drawing Technology,Dimensional accuracy ±0.05mm |
| Petroleum Cracking Units | Reformer Tubes,Heat Exchanger Tubes,Reactor Feed Pipes,Transfer Lines,Quench Oil Pipes | ASTM A335,ASTM A213, EN 10216-2 |
Optimized Material Purity,Precision Dimensional Control,Customized Solutions |
Tailored Features · Designed Exclusively for Your Needs
Custom-Shaped Steel Tubes – Precision Hex, Rectangular,D-Shaped & More for IndustrialComplex Cross-Section Expertise:
We specialize in precision-engineered steel tubes with custom profiles including:
✔ Standard Shapes: Hexagonal, rectangular, square, oval
✔ pecialty Profiles: D-shaped, lemon-shaped, triangular
✔ Full Customization: Tailored to your exact CAD specifications
Industry Applications:Automotive, Industrial Machinery, Agriculture Machinery，Hydraulic Systems
Special-Shaped Steel Tube Engineering – Custom Solutions for Automotive, Hydraulic Industrial Applications
Our 11+ member engineering team brings 30+ years of combined expertise in developing precision special-shaped tubes for:
✔ Automotive: Lightweight structural components, exhaust systems
✔ Hydraulics: High-pressure manifolds, precision connectors
✔ Industrial Equipment: Conveyor guides, machinery frames
✔ Energy: Heat exchanger tubing, boiler components
Precision Custom Alloy Steel Tubes – 20% Cost Efficiency with Guaranteed Performance Certified Mill Partnerships:
Collaborating with Baosteel, Xingcheng, and Shagang,we provide:
✔ 100+ Custom Alloy Grades –Tailored chemistry
(C, Cr, Mo, Ni adjustments)
✔ Engineered Properties – Yield strength 350-1200MPa customization
✔ Industrial-Grade QC – Full-spectrum testing (UT, hardness, dimensional)
Value Proposition:
✔ Verified 20% Cost Reduction – Through optimized supply chain
✔ echnical Consultancy– From material selection to application
✔ Consistent Quality – Batch-to-batch uniformity guaranteed
Advanced Heating Normalizing Technology for Precision Shapes Steel PipesInnovative Thermal Processing System:
Our extra-long piercing furnace ensures uniform billet heating, eliminating:
✓ Cracks ✓ Surface scaling ✓ Wall thickness variation
Automated normalizing furnace delivers:
✔ ±2°C temperature control– Industry-leading precision
Enhanced mechanical properties– Reliable performance for critical applications
Batch consistency– Optimized strength durability
Industry Applications:
Oil Gas, Automotive, Energy, Hydraulic Systems
Our Double Finned Tubes represent high-efficiency Cold-Drawn Hollow Special Steel Pipes engineered for superior thermal performance in demanding applications. Our double fin boiler tubes comply with standards such as EN 10216-2, ASME SA-210, and ASME SA-106，ASME SA-192 and ASME SA-179. Customizable materials include ASTM SA210A-1, ASTM SA210C, and molybdenum
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Our Hexagonal Steel Pipes, also known as Hexagonal Tubes or Hex Pipes, are high-precision Seamless Steel Tubes with a regular hexagonal cross-section. Manufactured from high-grade Carbon Steel and Alloy Steel through a specialized Cold-Drawing process, these Precision Hexagonal Bars offer exceptional dimensional accuracy, superior strength, and excellent sur
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Octagonal Steel Pipes represent our advanced line of eight-sided seamless tubes featuring precision regular octagonal cross-sections. These multi-faceted profile pipes are manufactured through sophisticated cold-drawing technology that transforms round steel billets into geometrically optimized octagonal configurations, maintaining the inherent strength of s
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Oval Steel Pipes and Elliptical Steel Tubes represent our specialized line of seamless oval-shaped sections engineered for applications requiring space-optimized profiles and enhanced structural performance. These cold-formed oval pipes are manufactured through precision cold-drawing processes that transform conventional round seamless tubes into aerodynamic
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