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Pipe & Tube Manufacturing Process

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Cold-Rolled Welded Tube for Industrial Applications

Custom Sizes OD10-108mm - ASTM/EN/DIN/JIS/GOST Certified - Small-Batch Friendly

Product Specifications

Parameter	Key Features
Outer Diameter	10-108mm (0.39"-4.25") • Fully customizable
Wall Thickness	1-6mm (0.039"-0.24") • ±0.1mm precision tolerance
Materials	Carbon Steel • Alloy Steel • Special grades available
Process	Cold Drawn & Cold Rolled for superior finish

Cold-Rolled Welded Carbon Steel Tube&Pipe -Steel Grade Availability

Cold-Rolled Welded Low-Alloy Steel Tube&Pipe -Steel Grade Availability

Standard	Typical Grades We Supply
GB	16Mn,Q345B(Q355B),Q345C(Q355C),Q345D(Q355D),Q345E(Q355E)
ASTM	Gr·50,Gr·55
EN	E355
DIN	ST52,S355JR,S355JO,S355J2,S355NL
GOST	15Г2,09Г2C,10Г2C1,C355
Other Speical Grades can be customized

Industry-Specific Solutions

Industry	Key Applications Parts	Relevant Standards	Our Advantages
General Manufacturing& Precision Components	Construction scaffolding,Warehouse racks,Motorcycle frames,Seat frames	GB/T 3091-2015	Good Surface,lightweight,precision dimensions (±0.1mm)
Automotive and Motorcycle Component,Agricultural Machinery	Agricultural equipment,Conveyor systems,Brake tubes,Shock absorbers	EN 10305-2:2016	High fatigue strength,High yield strength,lightweight,precision dimensions (±0.1mm)
General Manufacturing& Precision Components	Retail displays,Ventilation ducts,Drive shafts,Sprockets	ASTM A513-18	ID/OD tolerances of ±0.05mm.Wall thickness uniformity straightness ≤0.5mm/m
Machinery,Automotive	Machine frames,Cargo carts,Turbocharger tubes,Engine mounts	DIN 2393-1:2022	Enhanced material density through cold-drawing/rolling ensures long-term stability Full Compliance with Int'l Standards,Superior Creep & Fatigue Resistance
Construction Structures,Automotive	Construction joints,Temporary structures,Fuel rails,Swingarms	JIS G3445:2021	Good Surface, lightweight,precision dimensions (±0.1mm),Super Surface
General Manufacturing& Precision Components	Road barriers,Prefab buildings,Exhaust pipes,Bumpers	GOST 10705:2020	Arctic grade,GOST certification

Custom Advantages

Tailored Features · Designed Exclusively for Your Needs

Cost-Effective Custom Carbon & Alloy Steel Solutions - 10% Procurement Savings Strategic Mill Partnerships:
Working with Baosteel, Xingcheng, and Shagang, we provide:
✓ 100+ Steel Grades - Custom carbon & alloy compositions
✓ Tailored Properties - Yield strength 200-1200 options
✓ Industrial-Grade QC - Full material certification & testing

Fully Automated Normalizing Furnace Precision Heat Treatment for Superior Tube Quality
Tenjan's fully automated normalizing furnace delivers unmatched consistency in heat treatment, with ±2°C temperature control to optimize:
✓ Tensile & Yield Strength - Meet ASTM/EN/JIS standards
✓ Elongation & Hardness- Precise mechanical properties
✓ Metallurgical Structure- Uniform grain refinement

High-Precision Straightening Systems for Cold-Rolled Welded Tubes/PipesNext-Generation Straightening Technology
Tenjan's proprietary straightening systems combine advanced equipment with 20+ years of expert craftsmanship to deliver:
Ultra - Precision Straightness ≤0.5mm/m (4X more accurate than conventional machines)
30% Faster Machining - Optimized for CNC lathe processing
Equipment Protection - Reduces machine wear & maintenance costs by 40%

Advanced Dual NDT Inspection for Cold-Rolled Welded Tubes/Pipes Comprehensive Quality Control for Demanding Applications
Our dual NDT inspection system integrates ultrasonic and eddy current testing to ensure:
High-Sensitivity Flaw Detection - Identifies defects as small as 0.02mm
Complete Coverage - 12-probe array for full ID/OD inspection
Dimensional Accuracy - Simultaneously measures OD (±0.05mm) and wall thickness (±3%)

: Vertical Integration Excellence in Steel Tube Manufacturing

One-Stop Precision Tube Production from Raw Material to Finished Product

Material Customization: Alloy Steel & Carbon Steel design & Certified billet sourcing

Integrated Production：Seamless piercing, cold drawing/rolling, heat treatment，Integrated ECT/UT Inspection

Full Process Traceability: Batch-tracked at every production stage

: Certified Steel Tubes for Demanding Applications

Trusted Quality Backed by Global Standards

Quality Certifications:IATF 16949,ISO 9001,Third-party verified by SGS & TÜV

Material Compliance:ASTM (A519, A106, A179, A192) ,EN/DIN (10297, 2391,1629,10305) ,JIS (G3445/G3444)

: Precision-Engineered Steel Tubes • Customized for Your Critical Applications

Customized Material Specification | Dimensional Precision | Profile Customization | Performance Enhancement | Flexible Volume Production

> Carbon & alloy steel grades,Custom chemical composition,Full MTC traceability
> OD: 10–108mm (0.39"–4.25") WT: 1–20mm (0.04"–0.79")
> Seamless round tubes,Cold-formed shapes((square, rect., hex. & others)
> Annealed/Normalized,Quenched & Tempered,Surface finishes:Pickled/Oiled
> Small batch: 5 tons MOQ

: Total Steel Tube Solutions for Industry

Precision Tubes Engineered for: Auto Parts | Mechanical Parts | Agricultural Machinery | Mining Support & Construction | High-Pressure Systems

Technical Support Services: Design Consultation | Material Selection | Testing Validation

Value-Added Processing: Precision Cutting, Chamfering,OD/ID machining, Anti-rust oil, Custom Packaging
Learn More

: Customizable Alloy and Carbon Steel Grades

We offer customizable alloy and carbon steel gra- des to match your project’s exact requirements.

Why settle for generic materials when we can align specifications directly to your application? By focusing on only what you need, we deliver superior cost efficiency without compromising quality—saving you time and resources.

: Reliable Delivery Capacity

With an annual production capacity of 60,000 tons, we guarantee on-time delivery even for large-scale orders.

Our surplus capacity acts as a safety net, eliminating risks of bottlenecks or missed deadlines—critical for projects with strict timelines.

: Complete Manufacturing Supply Chain

We offer customizable alloy and carbon steel grades (ASTM, EN, DIN, JIS) to ma- tch your project’s exact requirements.

• Advanced metalworking: Piercing, pickling, heat treatment & cold forming
• Precision verification: Dual NDT (Ultrasonic/Eddy Current) + material testing (Tensile/Chemical)
• 24/7 lab monitoring of 60+ parameters ensuring product consistency

: Meet Regulatory Standards Compliance

IATF16949: Automotive-grade quality for precision parts.
TS (Pressure Pipe): Safety compliance for critical infrastructure (e.g., pipelines, boilers).
ISO9001: General excellence in process management.
Plus optional third-party validation (TÜV/SGS) for added credibility in regulated markets like aerospace, energy, or medical devices.