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Stainless Steel Tubes

Ashwin Steel provides an elite range of stainless steel tubes engineered for applications requiring precise outer diameters, wall thicknesses, and high surface purity. Unlike standard pipes, our tubes are manufactured to extremely tight tolerances, making them ideal for instrumentation, heat exchangers, and sanitary fluid transport.

We offer both seamless and welded tubes, thoroughly tested for pressure integrity and material composition. From delicate capillary tubes for medical devices to heavy-wall U-tubes for boilers, our products deliver outstanding thermal conductivity, corrosion resistance, and longevity in the most demanding conditions.

Stainless Steel Tubes

Available Grades

304304L316316L316Ti321347Duplex S31803S32205

Key Specifications

Sizes

OD: 6mm to 323.8mm

Thickness

0.5mm to 20mm (Gauge 10 to 22)

Standards

ASTM A213, ASTM A269, ASTM A249, ASTM A270

Forms

Seamless, Welded, U-Tubes, Capillary Tubes, Round, Square, Rectangular

Finishes

Bright Annealed (BA), Electropolished, Mechanical Polish (up to 800 Grit), Mill Finish

Specifications

Outer Diameter (OD)6mm to 323.8mm
Wall Thickness0.5mm to 20mm
Manufacturing FormSeamless, Welded, U-Bent
Internal/External FinishBA, Electropolished, Grit Polished
StandardsASTM A213, A269, A249, A270

Applications

  • Heat Exchangers & Condensers
  • Instrumentation & Control Lines
  • Dairy & Food Processing
  • Pharmaceuticals
  • Automotive Hydraulics
  • Architectural Handrails

Frequently Asked Questions

Frequently Asked Questions

Pipes are measured by Nominal Bore (NB) and Schedule (wall thickness) and are generally used for mass fluid transport. Tubes are measured by exact Outer Diameter (OD) and Wall Thickness (WT) in millimeters or inches, and are used for structural, instrumentation, or heat transfer applications where precise dimensions are critical.
Yes, we supply custom-bent U-tubes manufactured strictly to heat exchanger specifications (like ASTM A213), with stress-relieved bends to prevent stress corrosion cracking.
Sanitary tubes (often conforming to ASTM A270) have highly polished interior and exterior surfaces to prevent bacterial growth and allow easy cleaning. They are exclusively used in the food, dairy, and pharmaceutical industries.

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