Your Professional Stainless Welded Steel Tube Supplier
Torich International Limited is a specialized manufacturer of stainless steel tubing. Our product range encompasses a wide variety of items, including stainless welded steel tube, seamless tubes, square and rectangular tubes, oval exhaust tubes, special-shaped steel tubes, U-tubes, and more.
Our stainless welded steel tubes are produced through precision manufacturing processes, offering distinct advantages such as superior corrosion resistance and high dimensional accuracy. Consequently, they are widely utilized across diverse industries, including heat exchangers, automotive manufacturing, architectural decoration, medical equipment, chemical processing, and energy systems.
why choose Stainless Welded Steel Tube
Precise Dimensions
Manufactured from high-precision cold-rolled stainless steel strips, welded tubes offer uniform wall thickness, excellent concentricity, and stable dimensional accuracy-ideal for precision equipment and efficient heat transfer applications.
Cost-Effective & Efficient Production
Continuous roll-forming and welding deliver higher production efficiency than seamless processes, resulting in shorter lead times and more competitive pricing.
Large Diameter & Thin Wall Capability
Stainless Welded Steel Tube can easily achieve large diameters with thin wall thicknesses, making them ideal for structural, architectural, and lightweight applications where seamless tubes are less practical.
Excellent Surface Finish
Produced from smooth stainless steel strips and supported by polishing processes, welded tubes can achieve high-quality finishes, including mirror polish, suitable for food, pharmaceutical, and sanitary industries.
Comparison and Selection vs. Seamless Steel Pipes
Comparison Table
| products |
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| type | Stainless Steel Seamless Tubes | Stainless Steel Welded Tubes |
| Production Process | Solid billet piercing and rolling | Steel strip coiling and welding |
| Wall Thickness Uniformity | Fair (influenced by the piercing process) | Excellent |
| Dimensional Accuracy | Relatively High | High |
| Production Cost | Higher | Lower |
| Production Efficiency | Lower | Higher |
| Max. Diameter/Wall Thickness | Limited | Capable of producing large-diameter, thin-walled pipes |
| Pressure Resistance | Very High (excellent overall consistency) | Reliable (dependent on weld quality) |
| Primary Applications | High-pressure, high-temperature, and extreme operating conditions (e.g., oil wells, boiler tubes) | Structural, fluid transport, sanitary, decorative |
How to Choose
Situations Favoring Stainless Welded Steel Tube: High requirements for dimensional accuracy and wall thickness uniformity; a need for large-diameter or thin-walled pipes; applications involving the conveyance of mildly corrosive fluids or use as structural components; and situations where the budget is limited and operating conditions are not extreme.
Situations Requiring Stainless Steel Seamless Pipes: Extreme operating conditions involving extremely high pressures, extremely high temperatures, severe impact, or cyclic loading (e.g., high-pressure boilers, critical petrochemical units); and situations where safety requirements are exceptionally stringent, allowing for absolutely no tolerance of any potential risks associated with weld seams.
Production Process
Raw Material Inspection: Stainless steel coils are inspected for chemical composition, surface quality, and mechanical properties.
Slitting: Coils are slit into precise strip widths based on the required tube dimensions.
Forming: The strips are gradually roll-formed into a tubular shape through multiple roller stations.
Welding: High-frequency, TIG, or laser welding ensures strong, smooth, and reliable weld seams.
Weld Seam Treatment: Internal and external weld seams are ground and polished for a smooth surface finish.
Heat Treatment: Annealing improves ductility, corrosion resistance, and overall mechanical performance.
Sizing & Straightening: Tubes are precisely sized and straightened to meet strict dimensional tolerances.
Surface Treatment: Polishing, brushing, pickling, or passivation is applied according to application requirements.
Inspection & Testing: Tubes undergo dimensional inspection, pressure testing, and surface quality checks.
Packaging & Shipping: Export-standard packaging protects the tubes from damage during transportation.
What Services Do We Offer
Custom Size range
TORICH supports customization across a wide range of specifications, including outer diameter, wall thickness, and length.
Outer Diameter Range: 8 mm – 1800 mm
Wall Thickness Range: 0.5 mm – 55 mm
Custom steel grades
Depending on the operating environment, various stainless steel material options can be provided to meet requirements for corrosion resistance, high-temperature resistance, and high strength.
Custom Surface Finishing
Depending on specific application requirements, we offer various surface treatment processes, including BA grade, 2B, No. 4 brushed finish, mirror polishing, and pickling and passivation.
Tube Fabrication Services
TORICH offers comprehensive deep processing services, including laser cutting, bending, flaring, swaging, chamfering, and punching; we also support processing based on customer-provided drawings and samples.
Custom Packaging Solutions
To meet export shipping and project requirements, TORICH offers various packaging solutions-including woven bags, wooden crates, protective plastic film, and end caps-with customizable labels and logos.
Inspection & Certification Support
We accommodate customer-specified inspection standards and third-party certifications, offering services such as PMI testing, hydrostatic testing, eddy current testing, EN 10204 3.1/3.2 certification, and inspections by agencies such as SGS, BV, and TUV.
Customer cooperation
Frequently Asked Questions
1. What is the difference between stainless steel welded pipes and seamless pipes?
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Stainless steel welded pipes are formed from stainless steel coils and then welded; they are characterized by high dimensional accuracy, excellent surface quality, and cost-effectiveness. Seamless pipes, on the other hand, are produced using a piercing process and are typically utilized in ultra-high-pressure applications or extreme operating environments.
2. Can you customize dimensions and materials?
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Yes. We offer customization options for outer diameter, wall thickness, length, surface finish, and material grades-including a wide range of stainless steel alloys such as 304, 304L, 316L, 310S, 321, Duplex 2205, and others.
3. Which international standards do your stainless steel welded pipes comply with?
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Our products can be manufactured in accordance with various international standards, including ASTM, ASME, EN, DIN, and JIS-specifically standards such as ASTM A249, ASTM A269, ASTM A312, EN 10217-7, and others.
4. What inspection and certification services do you provide?
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We offer a comprehensive range of services, including PMI testing, hydrostatic testing, eddy current testing, dimensional inspection, and third-party certification. We can provide inspection reports such as EN 10204 3.1 / 3.2, as well as certifications from SGS, BV, TUV, and other agencies.
5. Do you offer export packaging and global shipping services?
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Yes. We provide specialized export packaging for sea freight, wooden crate packaging, protective film wrapping, and custom labeling. We also facilitate global shipping via sea, air, and container transport to ensure that your products are delivered safely and securely.
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