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Stainless Steel Seamless Pipes
What Are Stainless Steel Seamless Pipes?
Stainless steel seamless pipes are hollow cylindrical items that are manufactured using the hot rolling process or cold drawing of a solid stainless steel billet. In contrast to welded pipes, seamless pipes do not have longitudinal or circumferential weld seam, and they do not have weak places in them.
Such smooth construction helps the pipes to survive high internal pressure, high temperatures, and corrosive conditions and this makes them fit well in services that involve critical services like fluid transportation, heat exchangers, boilers, and pressure vessels.
Stainless Steel Seamless Pipes Manufacturer & Supplier in India
Solitaire Overseas is a reputable manufacturer, supplier and exporter of Stainless Steel Seamless Pipes, it provides precision engineered piping solutions to critical industrial projects. Our seamless pipes are produced out of solid stainless steel billets with no welded joints and hence have high strength, uniform structural properties as well as high resistance to pressure, temperature, and corrosion.
The stainless steel seamless pipes are commonly used in oil and gas, petrochemical, power generation, chemical processing, and heavy engineering industries wherein the degree of operational reliability and safety is uncompromising. Having a worldwide supply chain and quality management, Solitaire Overseas provides a smooth pipe solution that meets international standards and other project related needs.
Contact us for Stainless Steel Pipes today to receive a competitive quote and expert technical support for your next project.
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Table of Contents
- Stainless Steel Seamless Pipe Grades
- Stainless Steel Seamless Pipes Specifications
- Stainless Steel Seamless Pipes Standards
- Chemical Composition of SS Seamless Pipes
- Mechanical Properties of Seamless SS Pipes
- Stainless Steel Seamless Pipes Sizes
- ASTM A312 SS Seamless Pipe Schedule Chart
- Stainless Steel Seamless Pipe Weight Chart (Per Meter)
- Applications of Stainless Steel Seamless Pipes
- Why Choose Solitaire Overseas?
- Related Products
- FAQ’s About Seamless Stainless Steel Pipe
Stainless Steel Seamless Pipe Grades
We supply stainless steel seamless pipes in a wide range of austenitic stainless steel grades, each selected for specific operating conditions:
- SS 304 Seamless Pipes: General-purpose grade with good corrosion resistance and excellent formability, widely used in food processing and industrial piping.
- SS 304L Seamless Pipes:Low carbon variant of 304, offering improved weldability and resistance to intergranular corrosion.
- SS 316 Seamless Pipes:Contains molybdenum for enhanced resistance to chlorides and aggressive chemicals, ideal for marine and chemical environments.
- SS 316L Seamless Pipes: Low carbon version of 316, suitable for high-temperature and corrosive applications requiring post-weld integrity.
- SS 321 Seamless Pipes: Titanium-stabilized grade designed for high-temperature service and resistance to carbide precipitation.
- SS 310 Seamless Pipes: High chromium and nickel content provides excellent oxidation resistance at elevated temperatures.
Stainless Steel Seamless Pipes Specifications
Our SS Seamless Pipes are made as per ASTM A312 and international standards. Available in various sizes and thicknesses, they offer high strength, durability, and corrosion resistance for demanding industrial applications.
| Specification | Details |
|---|---|
| Standards | ASTM A312, ASME SA312, ASTM A213, EN 10216 |
| Material | Stainless Steel (Austenitic, Duplex, Super Duplex) |
| Sizes | 1/8" NB to 24" NB (Nominal Bore) |
| Outer Diameter | 6.35 mm to 609.6 mm |
| Wall Thickness | SCH 10, SCH 40, SCH 80, SCH 160, XXS, etc. |
| Type | Round, Square, Rectangular, Hydraulic |
| End Finish | Plain End, Bevelled End, Threaded |
| Length | Single Random, Double Random, Cut Length |
Stainless Steel Seamless Pipes Standards
Our stainless steel seamless pipes are manufactured and tested in accordance with major international standards:
| Standard | Description |
|---|---|
| ASTM A312 | Seamless, welded, and heavily cold-worked austenitic stainless steel pipes |
| ASTM A213 | Seamless ferritic and austenitic alloy-steel tubes for boilers and heat exchangers |
| ASTM A269 | Seamless and welded stainless steel tubing for general service |
| ASTM A106 | Seamless carbon steel pipe for high-temperature service (for compatible applications) |
Pipes are supplied with full traceability, test certificates, and inspection reports as required.
Chemical Composition of SS Seamless Pipes
This data highlights the precise elemental makeup of various stainless steel grades, detailing the concentration of Chromium, Nickel, and Molybdenum that defines their corrosion resistance.
| Grade | UNS No. | Carbon (C) | Manganese (Mn) | Chromium (Cr) | Nickel (Ni) | Molybdenum (Mo) |
|---|---|---|---|---|---|---|
| TP304 | S30400 | 0.08 max | 2.0 max | 18.0 - 20.0 | 8.0 - 11.0 | - |
| TP304L | S30403 | 0.035 max | 2.0 max | 18.0 - 20.0 | 8.0 - 13.0 | - |
| TP316 | S31600 | 0.08 max | 2.0 max | 16.0 - 18.0 | 10.0 - 14.0 | 2.0 - 3.0 |
| TP316L | S31603 | 0.035 max | 2.0 max | 16.0 - 18.0 | 10.0 - 14.0 | 2.0 - 3.0 |
| TP321 | S32100 | 0.08 max | 2.0 max | 17.0 - 19.0 | 9.0 - 12.0 | - |
Mechanical Properties of Seamless SS Pipes
The table below outlines the essential physical performance metrics, including tensile and yield strength, ensuring the material meets the structural demands of high-pressure environments.
| Grade | Tensile Strength (MPa, min) |
Yield Strength (MPa, min) |
Elongation (%, min) |
Hardness (HRB, max) |
|---|---|---|---|---|
| TP304 | 515 | 205 | 40 | 92 |
| TP304L | 485 | 170 | 40 | 92 |
| TP316 | 515 | 205 | 40 | 95 |
| TP316L | 485 | 170 | 40 | 95 |
| TP321 | 515 | 205 | 40 | 95 |
Stainless Steel Seamless Pipes Sizes
Solitaire Overseas offers stainless steel seamless pipes in a comprehensive range of sizes, schedules, and wall thicknesses to suit various industrial applications.
| Parameter | Range / Details |
|---|---|
| Outside Diameter (OD) | 6 mm NB to 600 mm NB |
| Schedules (SCH) | SCH 5, SCH 10, SCH 20, SCH 40, SCH 80, SCH 160, XXS |
| Wall Thickness | As per ASTM standards and customer requirements |
| Length | Random, double random, or cut lengths |
| Custom Options | Special sizes, tight tolerances, and finishes available on request |
Custom sizes, tight tolerances, and special finishes can be supplied on request.
ASTM A312 SS Seamless Pipe Schedule Chart
The following table provides a comprehensive overview of the wall thickness schedules available across various Nominal Pipe Sizes (NPS) to help you select the appropriate pressure rating for your piping system.
| Nominal Pipe Size (NPS) | Commonly Available Schedules |
|---|---|
| 1/8" to 3/4" | SCH 10S, SCH 40S, SCH 80S |
| 1" to 2" | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 2 1/2" to 3" | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 4" | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 6" | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 8" | SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 120, SCH 160 |
| 10" to 12" | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 14" to 24" | SCH 10S, SCH 40S (STD), SCH 80S (XS) |
Stainless Steel Seamless Pipe Weight Chart (Per Meter)
Our Seamless SS Pipes are available in multiple diameters and thicknesses, with precise weight per meter calculations to help in project planning and cost estimation.
| NPS (inch) | OD (mm) | Wall Thickness (mm) | Schedule | Weight (kg/m) |
|---|---|---|---|---|
| 1/2" | 21.3 | 2.77 | 40S | 1.29 |
| 1/2" | 21.3 | 3.73 | 80S | 1.65 |
| 3/4" | 26.7 | 2.87 | 40S | 1.71 |
| 3/4" | 26.7 | 3.91 | 80S | 2.23 |
| 1" | 33.4 | 3.38 | 40S | 2.54 |
| 1" | 33.4 | 4.55 | 80S | 3.29 |
| 1 1/2" | 48.3 | 3.68 | 40S | 4.11 |
| 1 1/2" | 48.3 | 5.08 | 80S | 5.49 |
| 2" | 60.3 | 3.91 | 40S | 5.52 |
| 2" | 60.3 | 5.54 | 80S | 7.60 |
| 3" | 88.9 | 5.49 | 40S | 11.47 |
| 3" | 88.9 | 7.62 | 80S | 15.51 |
| 4" | 114.3 | 6.02 | 40S | 16.32 |
| 4" | 114.3 | 8.56 | 80S | 22.67 |
| 6" | 168.3 | 7.11 | 40S | 28.69 |
| 6" | 168.3 | 10.97 | 80S | 43.21 |
| 8" | 219.1 | 8.18 | 40S | 43.20 |
| 8" | 219.1 | 12.70 | 80S | 65.63 |
Applications of Stainless Steel Seamless Pipes
Stainless steel seamless pipes are preferred in industries where strength, corrosion resistance, and long service life are essential:
- Oil & Gas Industry: Used in upstream, midstream, and downstream operations for transporting hydrocarbons, high-pressure fluids, and gases under extreme conditions.
- Petrochemical & Chemical Processing: Ideal for handling corrosive chemicals, acids, and solvents in reactors, heat exchangers, and processing pipelines.
- Power Generation: Used in boilers, superheaters, economizers, and steam pipelines where high temperature and pressure resistance is required.
- Industrial & Mechanical Applications: Applied in hydraulic systems, pressure vessels, and high-stress mechanical components.
Why Choose Solitaire Overseas?
- We source premium raw materials and follow strict manufacturing controls to ensure consistent quality.
- Complete coverage of grades, sizes, and schedules to meet diverse project needs.
- Supplying stainless steel seamless pipes to the Middle East, Europe, Asia, Africa, and the Americas.
- Optimized supply chain and bulk sourcing allow cost-effective solutions without compromising quality.
- Technical support, quick response, and customized solutions for EPC contractors and end users.
SS Seamless Pipes Export & Quality Certifications
All stainless steel seamless pipes supplied by Solitaire Overseas undergo rigorous inspection and testing, including:
- Chemical composition analysis
- Mechanical testing (tensile, yield, elongation)
- Hydrostatic and non-destructive testing
- Dimensional and visual inspection
We supply pipes with:
- Mill Test Certificates (EN 10204 3.1 / 3.2)
- Compliance with ASTM, ASME, and international standards
- ISO-certified quality management practices
Get a Quote for Stainless Steel Seamless Pipes
Fill out the form below or email sales@solitaire-overseas.com for a fast, no-obligation quote on any Stainless Steel Seamless Pipes
Contact UsFAQ’s About Seamless Stainless Steel Pipe
A seamless stainless steel pipe (SMLS Pipe) is a pipe made from a solid round steel billet without any welded joints. This process ensures high strength, durability, and uniformity, making it ideal for high-pressure and critical industrial applications.
Seamless pipes are made from a single solid billet and have no joints, offering superior strength and pressure resistance. Welded pipes are made by rolling and welding steel sheets, which can introduce weak points at the weld, making them less suitable for high-pressure applications.
The lifespan of a seamless stainless steel pipe depends on its material grade, operating conditions, and maintenance. Generally, high-quality SMLS Pipes can last 20–50 years or more, even in corrosive and high-temperature environments.
They are used in chemical, petrochemical, oil & gas, power plants, and high-pressure applications due to their reliability and ability to withstand extreme conditions.
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