Email - info@leoscoralloypipes.com

Stainless Steel Tubes

Home Stainless Steel Tubes

Stainless Steel Tube Manufacturer & Exporter

Leoscor Alloy Pipes is a trusted supplier, stockist, and exporter of premium-quality Stainless Steel Tubes in Mumbai, India, supplying customers across more than 65 countries worldwide. We maintain a wide inventory of stainless steel tubes manufactured as per international standards, including ASTM A213 (Seamless Tubes) and ASTM A249 (Welded Tubes).

Our Stainless Steel Tubes are available in various grades, including SS 304, SS 304L, SS 316, SS 316L, SS 317L, SS 321, SS 347, SS 310S, and SS 904L. We supply tubes in outside diameters ranging from 6 mm to 101.6 mm in seamless, welded, and bright annealed finishes. Each length is supplied with an EN 10204 3.1 Mill Test Certificate and a traceable heat number to ensure material authenticity and quality assurance.


Difference Between Stainless Steel Tubes and Pipes

Although stainless steel tubes and pipes may share the same material grade, they are different products designed for specific applications. Stainless Steel Pipes are generally specified by nominal size and schedule, while Stainless Steel Tubes are ordered according to their exact outside diameter and wall thickness.

Stainless Steel Tubes require tighter dimensional tolerances because they are commonly used in precision applications such as heat exchangers, condensers, boilers, and instrumentation systems. Accurate dimensions ensure proper fitting inside tube sheets and connections. Therefore, a 1-inch pipe and a 1-inch tube are not interchangeable and must be selected according to the required application.

Our Stainless Steel Seamless Tubes to ASTM A213 are the standard choice for heat exchanger and boiler bundles. Our Stainless Steel Welded Tubes to ASTM A249 are drawn and bright-annealed after welding, which gives a smooth bore for good heat transfer and is why they are accepted alongside seamless tube in most heat-exchanger specifications. For instrumentation and hydraulic lines, we also stock ASTM A269 general corrosion-resisting tube.

For grade selection or a quote, send us your requirement.

 

Stainless Steel Tubes

Stainless Steel Tubes

Stainless Steel Tubes

Stainless Steel Tubes

Stainless Steel Tubes

Why Buy Stainless Steel Tubes from Leoscor Alloy Pipes

Leoscor Alloy Tubes is a trusted stockist, distributor, and supplier of Stainless Steel Tubes from India, with decades of experience serving global industries. Our focus on quality, reliable supply, and customer satisfaction ensures dependable piping solutions.

Key advantages of choosing us:

  • Extensive inventory of standard sizes and grades
  • Reliable sourcing from reputed manufacturers
  • Strict quality control and experienced professionals
  • Strong logistics and timely delivery support
  • Modern infrastructure with large storage capacity
  • ISO 9001:2015 certified company
    Contact us for Stainless Steel Tubes – info@leoscoralloypipes.com

Contact Us

    What we hold in stock

    Tube tolerances are tighter than pipe tolerances because the tube has to seat correctly in a tube sheet or ferrule fitting. That is the main thing to flag on a drawing when you move from a pipe spec to a tube spec.

    Specifications Details
    Standards ASTM A213, A249, A269, A270, A554 and the matching ASME SA specifications
    OD Range 6 mm to 101.6 mm (1/4″ to 4″)
    Wall Thickness 0.5 mm to 6 mm, specified by BWG or direct mm callout
    OD Tolerance ±0.10 mm up to 25 mm OD, ±0.4% above that
    Forms Seamless, Welded, Bright Annealed, ERW
    Shapes Round (standard stock); square, rectangular and U-bend on request
    Lengths Single Random (5 to 7 m), Double Random (8 to 13 m), Cut to Length
    End Finish Plain End; U-bend fabrication on request
    Surface Bright Annealed (standard for heat-exchanger tube), Pickled, Polished
    Certification EN 10204 3.1 as Standard, 3.2 on Request

    OUR RANGE OF STAINLESS STEEL TUBES

    Choosing the right stainless tube grade

    The grade logic is the same chemistry as pipe, but where you land depends on what is on the shell side and tube side of your exchanger, not just the process fluid.

    Grade UNS PREN (approx.) Pick it when
    304 / 304L S30400 / S30403 18 to 20 Steam and condensate service, food and dairy heat exchangers, no chlorides on either side.
    316 / 316L S31600 / S31603 24 to 26 Cooling water with mild chlorides, most chemical plant heat exchangers. The default for shell-and-tube units.
    317L S31703 29 to 31 316L tube bundles are pitting on the water side faster than expected.
    321 / 321H S32100 / S32109 18 to 20 Superheater and reheater tube that runs hot after welding. Titanium stabilisation stops carbide precipitation at the weld.
    347 / 347H S34700 / S34709 18 to 20 Same duty as 321 tube, higher creep strength needed. Niobium stabilised, common in boiler superheater bundles.
    310 / 310S S31000 / S31008 24 to 26 Radiant tube and furnace-mounted heat exchangers running to around 1050°C.
    904L N08904 34 to 36 Sulphuric acid coolers and heat exchangers in reducing acid duty.

    If your tube bundle sees seawater or brine on the cooling side, standard austenitic grades will not hold up. See our
    nickel alloy tube range
    for Titanium, 90/10 Cupro-Nickel or Monel options instead.

    Sizes and wall thicknesses

    Tube size is specified by outside diameter and wall thickness directly, not by nominal size and schedule the way pipe is. Wall thickness is commonly called out in BWG (Birmingham Wire Gauge) on heat-exchanger drawings, so we have listed the mm equivalent alongside.

    OD (mm) OD (inch) 16 BWG (mm) 14 BWG (mm) 12 BWG (mm)
    12.7 1/2″ 1.65 2.11 2.77
    15.88 5/8″ 1.65 2.11 2.77
    19.05 3/4″ 1.65 2.11 2.77
    25.4 1″ 1.65 2.11 2.77
    31.75 1 1/4″ 1.65 2.11 2.77
    38.1 1 1/2″ 1.65 2.11 2.77

    Wall thickness in BWG stays constant across most OD sizes for a given gauge — unlike pipe schedule, where wall thickness changes with size. To convert to weight: kg per metre = (OD minus WT) x WT x 0.0248, both dimensions in mm.

    Industries we supply

    Our stainless tube goes into shell-and-tube heat exchangers, condensers, boiler and superheater bundles, instrumentation and hydraulic lines, and sanitary process lines for food, dairy and pharmaceutical plants. The same client base we supply in pipe — Shell, Saudi Aramco, ONGC, ADNOC, Qatar Petroleum, Petrofac and Kuwait Oil Company — also draws tube from us for their heat-exchanger and instrumentation packages.

    FAQ

    What is the difference between stainless steel pipe and tube?

    Pipe is ordered by nominal pipe size and schedule, built to carry fluid, so the inside diameter is what matters to the designer. Tube is ordered by exact outside diameter and wall thickness, held to tighter tolerances, and used in heat exchangers, boilers, instrumentation and mechanical work. A 1 inch pipe and a 1 inch tube are different sizes and are not interchangeable on a bill of materials.

    Should I specify seamless or welded tube for a heat exchanger?

    Both are accepted in most heat-exchanger codes when the welded tube is bright-annealed after welding, which A249 requires. Seamless is still preferred for the highest-pressure or most critical bundles. For general shell-and-tube service, welded A249 tube is widely used and costs less.

    What does BWG mean on a tube drawing?

    Birmingham Wire Gauge, a thickness numbering system used on most heat-exchanger and condenser drawings instead of a direct millimetre callout. A lower BWG number means a thicker wall — 12 BWG is thicker than 16 BWG. We can supply either BWG or direct mm specification.

    Do you supply mill test certificates?

    Yes. Every consignment ships with an EN 10204 3.1 mill test certificate showing heat number, chemical analysis and mechanical test results. Type 3.2 with third-party endorsement is available where your contract requires it.

    Get a quote for stainless steel tubes

    Send your grade, OD, wall thickness, quantity and destination. Our team replies with current price, available stock and a delivery schedule.

    Request a quote | Call +91 22 2386 7540 | Email info@leoscoralloypipes.com