At Tenjan, we specialize in manufacturing JIS G3461 seamless steel tubes that set the benchmark for boiler and heat exchanger applications. Our cold-drawn precision tubes are engineered to deliver exceptional performance in high-temperature and high-pressure environments, ensuring reliable heat transfer efficiency and long-term operational safety. Through ou
Technical Excellence Through Advanced Manufacturing
While JIS G3461 covers both seamless and welded tubing options, Tenjan focuses exclusively on seamless cold-drawn production to deliver unmatched quality and performance. Our manufacturing philosophy centers on precision, consistency, and reliability – values that align perfectly with the rigorous requirements of this standard.
Tenjan’s Manufacturing Advantages
Precision Cold-Drawing Technology
•Enhanced dimensional accuracy ensuring perfect fit in heat exchanger assemblies
•Superior surface finish minimizing fluid resistance and fouling
•Controlled wall thickness distribution for uniform heat transfer
•Optimized mechanical properties through strain hardening effects
Material Performance Enhancement
•Improved grain structure and material density through cold working
•Consistent mechanical properties across all production batches
•Superior resistance to deformation under thermal cycling conditions
•Enhanced structural integrity for critical pressure applications
Quality Assurance & Performance Validation
Tenjan’s commitment to quality ensures every JIS G3461 tube exceeds standard requirements:
Comprehensive Testing Protocol
•Full hydrostatic testing verifying pressure containment capability
•Advanced non-destructive examination detecting imperfections
•Complete mechanical properties validation including tensile and yield strength
•Dimensional accuracy certification for critical application parameters
Certification & Traceability
•Complete material traceability from steelmaking to finished tubes
•Detailed test certificates providing comprehensive performance data
•ISO 9001 certified manufacturing processes
•Customized documentation packages supporting project compliance
Applications & Engineering Solutions
Tenjan’s JIS G3461 tubes deliver reliable performance across diverse thermal applications:
Heat Exchange Systems
•Shell and tube heat exchangers for industrial processes
•Condenser and evaporator tubing in refrigeration systems
•Process industry heat transfer equipment
•Energy recovery and waste heat utilization systems
Boiler Applications
•Water tube boiler components
•Thermal fluid heating systems
•Industrial steam generation equipment
•Process heating circuit piping
Tenjan’s Value Proposition
Our specialized manufacturing approach delivers distinct advantages for heat exchanger applications:
Technical Expertise
•Advanced cold-drawing technology ensuring precision dimensions
•Engineering support for optimal material selection
•Technical consultation for complex application requirements
•Customized solutions for specific project needs
Quality Commitment
•Stringent process controls throughout manufacturing
•Continuous quality monitoring and improvement
•Professional technical assistance for installation guidance
•Reliable performance in demanding service conditions
Customer-Centric Approach
•Flexible manufacturing accommodating specific requirements
•Responsive service supporting project timelines
•Comprehensive technical documentation
•After-sales support ensuring application success
Through our dedicated manufacturing approach, Tenjan delivers JIS G3461 tubes that combine standard compliance with practical application excellence. Our expertise in cold-drawing processes ensures we can meet your specific heat exchanger requirements while maintaining the highest standards of quality and reliability for your most critical thermal applications.
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 |
| Industry | Typical Grades We Supply |
| GB | DT4,Y15,10#,20#,20G,Q235,25Mn,35#,45#,55# |
| ASTM | 1215,1008,1010,1020,A105,A106 Gr.B,A36,1026,1035,1045,1055,SA179,SA192 |
| EN | DC01,11SMn30,P235TR1,P195GH,P265TR2,E235 |
| DIN | DC01,11SMn30,CK10,C10,ST35.8,C20,CK20, ST45.8,St37,S235JR,C26D,CK35,CK45,CK55 |
| JIS | SUM22,S10C,STKM11A,STPT370,STB35,S20C,STKM12, STKM13,STPT410,STB42,SS400,S35C,S45C,S55C |
| GOST | 08КП,10,20,Ст3сп,25,35,45,55 |
| Other Speical Grades can be customized | |
| Standard | Key Applications Parts | Relevant Standards | Our Advantages |
| 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
Breakthrough in Pure Iron 1215 Steel Tube Mass Production – 30% Cost Saved vs. Solid Bar Machining Industry-First Innovation:
We’ve achieved mass production of precision soft iron carbon tubes and 1215 free-cutting steel tubes, eliminating costly machining steps for OEMs.
Key Benefits:
✔ 30% Lower Total Cost– Replace solid round bars (no boring needed)
✔ Faster Production – Reduced machining & assembly time
✔ Less Waste – Precision hollow tubes optimize material use
Applications: Automotive, Hydraulics, Fasteners, and Machined Components.
Cold Drawing + Cold Rolling Dual-Process Technology – Affordable Small-Diameter Seamless Steel TubesInnovative Production for Precision Tubes:
Our self-developed piercing mill combines cold drawing & cold rolling, optimizing efficiency for small-diameter seamless steel tubes (OD<50mm).
Key Advantages:
✔ Lower Cost – Dual-process reduces material waste & energy use
✔ Tighter Tolerances– Improved surface finish & dimensional accuracy
✔ Faster Lead Time– Streamlined production vs. traditional methods
Applications: Automotive, Hydraulics,Oil & Gas/Petrochemical，High-Pressure Boilers，and Fluid Transport Systems.
100+ Carbon Steel Grades – Customize for 20% Cost Savings (Machining,Construction More） Premium Steel Supply Chain:
Partnering with Baosteel, Xingcheng Shagang, we offer 100+ fully customizable carbon steel grades with guaranteed quality and stable supply.
Customization Advantages:
✔ Chemical Composition– Adjust C, Mn, Si, etc. for specific applications
✔ Mechanical Properties– Yield/Tensile strength optimization
✔ Rigorous QC– Full inspection (UT, hardness testing, dimensional checks)
✔ 20% Procurement Savings– Bulk pricing process efficiency
Key Industries Served: Machining Automotive，Construction Infrastructure, Oil Gas, Heavy Equipment
High-Precision Tube Straightening Technology – ≤0.5mm/m Tolerance for 30% Faster MachiningIndustry-Leading Straightening Solutions:
Our proprietary system delivers carbon steel tubes with ≤0.5mm/m straightness-4X more precise than industry standards, specifically engineered for high-speed machining applications.
Key Advantages:
✔ 30% Production Boost– Perfect straightness reduces lathe processing time
✔ Tool Life Extension– Minimizes cutting tool stress and wear
✔ Cost Efficiency– Lower maintenance and higher throughput
Technical Superiority:
In-House Developed Equipment– Customized for machining-grade precision
20+ Years Expertise– Master technicians ensure optimal results
Automated Quality Control– Consistent straightness verification
Ideal for:Hydraulic Cylinder Tubes, Automotive Shafts, Industrial Machinery, Oil Gas Equipment
Ultrasonic + Eddy Current Dual-Testing – 0.20mm Flaw Detection for Critical Steel Tubes Industry-Leading NDT Precision:
Our dual-technology inspection systemdelivers 0.20mm flaw detection accuracy– the gold standard for mission-critical tubing applications.
Dual-Testing Advantages:
✔ Ultrasonic Testing (UT)– Detects 0.20mm micro-cracks & inclusions
✔ Eddy Current (ET)– Pinpoints surface/subsurface defects
✔ Multi-Probe Array– 360° coverage (ID/OD/wall thickness)
Two-Layer Quality Assurance
Flaw Detection: Cracks/pores/inclusions ≤0.20mm
Dimensional Control: ±0.05mm tolerance verification
Critical Applications: Automotive Airbag Tubes,Fluid Transport Systems, Petrochemical High-Pressure Piping
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