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Girgaon, Mumbai - 400004
Stainless Steel 316L Seamless Pipes
What is Stainless Steel 316L Seamless Pipe?
Stainless Steel 316L Seamless Pipes are manufactured from low-carbon austenitic stainless steel and are widely selected for applications requiring strong corrosion resistance, durability and dependable performance. The addition of molybdenum provides enhanced resistance to many corrosive environments, while the seamless construction offers a continuous pipe structure without a longitudinal welded joint. These characteristics make SS 316L seamless pipe suitable for demanding process and industrial piping systems.
Kamal Steels supplies Stainless Steel 316L Seamless Pipes in various sizes, schedules, wall thicknesses, lengths and finishes according to applicable specifications and customer requirements. ASTM A312 TP316L and ASME SA312 pipe options can be supplied for chemical processing, petrochemical, pharmaceutical, food processing, marine, oil & gas and other industrial applications, with testing, inspection and material documentation available as required.
Table of Contents
- SS 316L Seamless Pipe Specifications
- SS 316L Seamless Pipe Size Chart
- SS 316L Seamless Pipe Weight Chart
- SS 316L Seamless Pipe Schedule Chart
- ASTM A312 TP316L Seamless Pipe
- SS 316L Seamless Pipe Chemical Composition & Mechanical Properties
- SS 316L Seamless Pipe vs Welded Pipe
- SS 316L Seamless Pipe Applications & Industries
- Frequently Asked Questions
SS 316L Seamless Pipe Specifications
| Specification | Details |
|---|---|
| Product Name | Stainless Steel 316L Seamless Pipe |
| Grade | SS 316L / Type 316L |
| UNS | S31603 |
| EN Grade | 1.4404 |
| Material Type | Austenitic Stainless Steel |
| Manufacturing Process | Seamless |
| Product Standard | ASTM A312 |
| ASME Specification | ASME SA312 |
| Size Range | 1/8" to 24" and above as required |
| Schedule | 5S, 10S, 40S, 80S, 160 and other schedules |
| Wall Thickness | As per applicable schedule or specified requirement |
| Length | Random, Double Random or Fixed Length |
| End Type | Plain End, Bevelled End or Threaded End as required |
| Surface Finish | Pickled & Passivated, Annealed, Bright Annealed or Polished |
| Heat Treatment | Solution Annealed and Rapidly Cooled as specified by the applicable standard |
| Testing | Hydrostatic, PMI, Ultrasonic, Flattening, Flaring and other applicable tests |
| Inspection | Third Party Inspection available as required |
| Certification | EN 10204 3.1 / Material Test Certificate (MTC) |
| Packaging | Bundles, Wooden Cases, Wooden Boxes, Plastic End Caps and Export Packing |
SS 316L Seamless Pipe Size Chart
Stainless Steel 316L Seamless Pipes are available in a broad range of nominal pipe sizes and outside diameters for different industrial piping requirements. The required size is generally selected according to flow requirements, pressure conditions, piping design and applicable standards.
| NPS | Nominal Size | Typical Outside Diameter |
|---|---|---|
| 1/8" | DN 6 | 10.3 mm |
| 1/4" | DN 8 | 13.7 mm |
| 1/2" | DN 15 | 21.3 mm |
| 1" | DN 25 | 33.4 mm |
| 2" | DN 50 | 60.3 mm |
| 3" | DN 80 | 88.9 mm |
| 4" | DN 100 | 114.3 mm |
| 6" | DN 150 | 168.3 mm |
| 8" | DN 200 | 219.1 mm |
| 10" | DN 250 | 273.1 mm |
| 12" | DN 300 | 323.9 mm |
Other sizes and dimensions can be supplied according to the applicable specification, project requirements and availability.
SS 316L Seamless Pipe Weight Chart
The weight of Stainless Steel 316L Seamless Pipe depends mainly on its outside diameter, wall thickness and length. Heavier schedules have greater wall thickness and therefore higher weight per metre. Actual supplied weight may vary according to dimensional tolerances and the applicable manufacturing standard.
| Pipe Size | Schedule | Approx. Weight |
|---|---|---|
| 1/2" | SCH 40S | Approx. 1.27 kg/m |
| 1" | SCH 40S | Approx. 2.09 kg/m |
| 2" | SCH 40S | Approx. 5.03 kg/m |
| 3" | SCH 40S | Approx. 7.68 kg/m |
| 4" | SCH 40S | Approx. 10.79 kg/m |
| 6" | SCH 40S | Approx. 18.97 kg/m |
For exact weight calculations, the pipe outside diameter, wall thickness, length and material density should be considered. The final shipping weight should be confirmed from the actual product dimensions and applicable tolerances.
SS 316L Seamless Pipe Schedule Chart
Pipe schedules indicate the wall thickness of a pipe for a particular nominal pipe size. Stainless Steel 316L Seamless Pipes can be supplied in different schedules depending on the required pressure rating, dimensions and application.
| Schedule | Common Description | Typical Application |
|---|---|---|
| SCH 5S | Light Wall | Low-pressure and utility services |
| SCH 10S | Light Wall | Process and general industrial piping |
| SCH 40S | Standard Wall | General industrial and process applications |
| SCH 80S | Heavy Wall | Higher-pressure service applications |
| SCH 160 | Extra Heavy Wall | Specialized high-pressure applications |
ASTM A312 TP316L Seamless Pipe
ASTM A312 TP316L Seamless Pipe is manufactured from Type 316L stainless steel according to the applicable requirements of ASTM A312. TP316L is identified as UNS S31603 and is commonly selected for corrosive service, process piping and applications where the combination of molybdenum alloying and low carbon content is beneficial.
The corresponding ASME designation is commonly identified as SA312 where the applicable ASME Code requirements apply. Pipe dimensions, schedules, heat treatment, mechanical properties, testing and acceptance requirements should be confirmed against the applicable specification and purchase requirements.
SS 316L Seamless Pipe Chemical Composition & Mechanical Properties
Stainless Steel 316L is an austenitic chromium-nickel-molybdenum stainless steel with a reduced carbon content compared with standard 316. Its composition contributes to its corrosion resistance and makes it suitable for a wide range of chemical, marine, process and industrial applications.
| Element | Typical / Maximum Requirement |
|---|---|
| Carbon (C) | ≤ 0.030% |
| Chromium (Cr) | 16.0–18.0% |
| Nickel (Ni) | 10.0–14.0% |
| Molybdenum (Mo) | 2.0–3.0% |
| Manganese (Mn) | ≤ 2.00% |
| Silicon (Si) | ≤ 1.00% |
| Phosphorus (P) | ≤ 0.045% |
| Sulfur (S) | ≤ 0.030% |
Mechanical properties such as tensile strength, yield strength and elongation are specified by the applicable product standard. For ASTM A312 TP316L pipe, the required values should be verified from the current specification and the material test certificate supplied with the order.
SS 316L Seamless Pipe vs Welded Pipe
Both seamless and welded stainless steel pipes are used in industrial piping systems, but their manufacturing methods are different. A seamless pipe is produced without a longitudinal weld seam, while a welded pipe is manufactured by forming stainless steel material and joining the longitudinal edges using an appropriate welding process.
| Feature | SS 316L Seamless Pipe | SS 316L Welded Pipe |
|---|---|---|
| Manufacturing | Produced without a longitudinal weld | Manufactured using a welded longitudinal joint |
| Pressure Service | Suitable for specified pressure applications | Suitable where permitted by the applicable specification |
| Size Range | Commonly used across small and medium pipe sizes | Can be advantageous for larger diameter requirements |
| Selection | Selected where seamless construction is required | Selected based on specification, dimensions and application |
The choice between Stainless Steel 316L Seamless Pipe and welded pipe should be based on the applicable standard, pressure and temperature conditions, pipe dimensions, fabrication requirements and project specifications.
SS 316L Seamless Pipe Applications & Industries
Stainless Steel 316L Seamless Pipes are used across industries where enhanced corrosion resistance, durability and reliable service performance are required. The molybdenum-bearing composition makes Grade 316L suitable for many environments involving chlorides, chemicals and process fluids, subject to actual service conditions.
Oil & Gas
Industry: Oil & Gas
Application: Process piping, utility lines, fluid transfer and plant service piping.
Chemical Processing
Industry: Chemical Processing
Application: Chemical fluid handling, process lines and corrosion-resistant piping systems.
Petrochemical
Industry: Petrochemical
Application: Process piping, plant utility systems and equipment connections.
Pharmaceutical
Industry: Pharmaceutical
Application: Process lines, utility piping and corrosion-resistant fluid handling systems.
Food & Beverage
Industry: Food & Beverage
Application: Hygienic piping, process fluid transfer and stainless steel processing systems.
Marine & Offshore
Industry: Marine & Offshore
Application: Marine piping, seawater-related services and offshore process systems.
Kamal Steels supplies Stainless Steel 316L Seamless Pipes for domestic and international requirements with support for applicable specifications, inspection requirements, material documentation and export packaging.
Frequently Asked Questions
ASTM A312 TP316L Seamless Pipe is a low-carbon austenitic stainless steel pipe containing chromium, nickel and molybdenum. It offers excellent corrosion resistance, superior weldability and is widely used in chemical, marine, pharmaceutical and food processing industries.
The primary difference is carbon content. TP316L contains a maximum of 0.03% carbon compared to 0.08% in TP316. This lower carbon content improves weldability and reduces the risk of intergranular corrosion after welding.
SS 316L Seamless Pipes are commonly available from 1/8" NB to 24" NB in various schedules including SCH 5S, SCH 10S, SCH 40S and SCH 80S according to ASTM A312 and ASME standards.
The molybdenum content in 316L Stainless Steel Pipe provides excellent resistance to pitting and crevice corrosion caused by chlorides and seawater, making it ideal for marine and offshore environments.
ASTM A312 TP316L Pipes are available in SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 120 and SCH 160 depending on project requirements and pressure ratings.
Yes. TP316L Pipe is specifically preferred for welding applications because its low carbon content minimizes carbide precipitation and improves resistance to weld-related corrosion.
These pipes are widely used in chemical processing, oil & gas, pharmaceuticals, food processing, marine engineering, offshore platforms, power generation and water treatment industries.
Yes. SS 316L Seamless Pipes are generally supplied with EN 10204 3.1 Mill Test Certificates (MTC) and can also be provided with third-party inspection reports upon request.
The price depends on pipe size, schedule, quantity, testing requirements and current stainless steel raw material costs. Contact Kamal Steels for the latest TP316L Pipe price and stock availability.
Kamal Steels is a leading manufacturer, stockist, supplier and exporter of ASTM A312 TP316L Seamless Pipe in India, offering ready stock, competitive pricing and worldwide delivery.