-
-
-
Girgaon, Mumbai - 400004
Stainless Steel Seamless Pipes Manufacturer in India
What are Stainless Steel Seamless Pipes?
Stainless Steel Seamless Pipes are manufactured from a solid stainless steel billet without any welded seam, providing excellent pressure resistance, superior mechanical strength and outstanding corrosion protection. Their seamless construction ensures uniform wall thickness and reliable performance in high-pressure, high-temperature and corrosive service environments. These pipes are widely used for transporting liquids, gases, steam, and process fluids across industries where safety, durability and long service life are essential.
Kamal Steels is a trusted Manufacturer and Stockist of Stainless Steel Seamless Pipes in India, supplying high-quality pipes manufactured in accordance with ASTM, ASME and other international standards. Our product range includes stainless steel grades such as 304, 304L, 316, 316L, 321, 347, 310S and 904L, ensuring the right material for diverse industrial applications.
Available in a wide range of nominal pipe sizes, schedules, wall thicknesses, surface finishes, and custom lengths, our Stainless Steel Seamless Pipes are suitable for oil & gas, petrochemical, chemical processing, pharmaceutical, food processing, marine, power generation, pulp & paper and water treatment industries. Every pipe undergoes strict quality inspection and is supplied with Mill Test Certificates (MTC) to ensure compliance with international standards.
With extensive ready stock, project-specific manufacturing capabilities, competitive pricing, and timely worldwide delivery, Kamal Steels supports domestic and international customers with stainless steel seamless pipes designed to deliver long-term reliability and consistent performance.
Need a Quote for ASTM A312 Stainless Steel Seamless Pipes?
Share your required grade, size, schedule and quantity and our team will send a fast quotation with stock availability and delivery details.
Table of Contents
- Stainless Steel Seamless Pipe Specifications
- Stainless Steel Seamless Pipe Size Chart
- Stainless Steel Seamless Pipe Weight Chart
- Stainless Steel Seamless Pipe Schedule Chart
- Stainless Steel Seamless Pipe Dimensions Chart
- Stainless Steel Seamless Pipe Pressure Rating Chart
- Chemical Composition of Stainless Steel Seamless Pipes
- Mechanical Properties of Stainless Steel Seamless Pipes
- Grades of Stainless Steel Seamless Pipes
- Features of Stainless Steel Seamless Pipes
- Why Choose Stainless Steel Seamless Pipes?
- Applications of Stainless Steel Seamless Pipes
- Industries We Serve
- Frequently Asked Questions
Stainless Steel Seamless Pipe Specifications
| Product Name | Stainless Steel Seamless Pipes |
|---|---|
| Standards | ASTM A312, ASTM A358, ASTM A790, ASME SA312 |
| Material Grades | 304, 304L, 310, 310S, 316, 316L, 316Ti, 317L, 321, 347, 347H, 904L, Duplex & Super Duplex |
| Manufacturing Process | Hot Finished / Cold Drawn Seamless |
| Outside Diameter | 1/8" NB to 24" NB (10.3 mm to 609.6 mm) |
| Wall Thickness | SCH 5S to SCH XXS |
| Length | Single Random, Double Random, 6 Meter or Custom Cut Lengths |
| Pipe Ends | Plain End (PE), Beveled End (BE), Threaded |
| Surface Finish | Annealed, Pickled, Bright Annealed (BA), Polished |
| Testing | Hydrostatic Test, PMI, Ultrasonic Test, Eddy Current Test, Flattening Test, Flaring Test, Third-Party Inspection |
| Certification | EN 10204 3.1 MTC, ISO Certified |
| Applications | Oil & Gas, Petrochemical, Chemical Processing, Power Plants, Marine, Food Processing, Pharmaceutical & Water Treatment |
Stainless Steel Seamless Pipe Size Chart
Stainless Steel Seamless Pipes are available in various nominal pipe sizes (NPS), nominal bore (NB) and outside diameters (OD) to meet the requirements of industrial piping systems. The chart below provides the standard pipe sizes manufactured according to ASTM A312 and ASME B36.19M.
| Nominal Bore (NB) | NPS (Inch) | Outside Diameter (OD) (mm) |
|---|---|---|
| 3 | 1/8" | 10.3 |
| 6 | 1/4" | 13.7 |
| 10 | 3/8" | 17.1 |
| 15 | 1/2" | 21.3 |
| 20 | 3/4" | 26.7 |
| 25 | 1" | 33.4 |
| 32 | 1 1/4" | 42.2 |
| 40 | 1 1/2" | 48.3 |
| 50 | 2" | 60.3 |
| 65 | 2 1/2" | 73.0 |
| 80 | 3" | 88.9 |
| 100 | 4" | 114.3 |
| 125 | 5" | 141.3 |
| 150 | 6" | 168.3 |
| 200 | 8" | 219.1 |
| 250 | 10" | 273.1 |
| 300 | 12" | 323.9 |
| 350 | 14" | 355.6 |
| 400 | 16" | 406.4 |
| 450 | 18" | 457.2 |
| 500 | 20" | 508.0 |
| 600 | 24" | 609.6 |
Stainless Steel Pipe Weight Chart
The following chart provides the approximate weight per metre (kg/m) of stainless steel seamless pipes in different schedules. Actual weights may vary slightly depending on manufacturing tolerances and applicable standards.
| NPS (Inch) | OD (mm) | SCH 5S (kg/m) |
SCH 10S (kg/m) |
SCH 40S (kg/m) |
SCH 80S (kg/m) |
SCH 160 (kg/m) |
XXS (kg/m) |
|---|---|---|---|---|---|---|---|
| 1/8" | 10.3 | 0.28 | 0.28 | 0.38 | 0.51 | 0.71 | 0.71 |
| 1/4" | 13.7 | 0.38 | 0.51 | 0.71 | 0.98 | 1.34 | 1.34 |
| 3/8" | 17.1 | 0.48 | 0.64 | 0.81 | 1.15 | 1.58 | 1.58 |
| 1/2" | 21.3 | 0.77 | 1.00 | 1.27 | 1.62 | 2.09 | 2.09 |
| 3/4" | 26.7 | 1.00 | 1.27 | 1.69 | 2.22 | 2.87 | 2.87 |
| 1" | 33.4 | 1.27 | 1.95 | 2.50 | 3.24 | 4.55 | 4.55 |
| 1 1/4" | 42.2 | 1.62 | 2.49 | 3.39 | 4.47 | 6.10 | 6.10 |
| 1 1/2" | 48.3 | 1.86 | 2.86 | 4.05 | 5.41 | 7.63 | 7.63 |
| 2" | 60.3 | 2.50 | 3.64 | 5.44 | 7.48 | 10.97 | 10.97 |
| 2 1/2" | 73.0 | 3.64 | 5.26 | 8.63 | 11.41 | 16.25 | 16.25 |
| 3" | 88.9 | 4.45 | 6.43 | 11.29 | 15.27 | 21.95 | 21.95 |
| 4" | 114.3 | 5.73 | 8.30 | 16.07 | 22.32 | 32.61 | 32.61 |
| 5" | 141.3 | 8.05 | 9.84 | 21.77 | 31.41 | 46.70 | 46.70 |
| 6" | 168.3 | 9.62 | 11.79 | 28.26 | 42.56 | 63.63 | 63.63 |
| 8" | 219.1 | 12.63 | 17.12 | 42.55 | 63.64 | 94.60 | 94.60 |
| 10" | 273.1 | 17.07 | 21.00 | 60.32 | 82.24 | 121.73 | 121.73 |
| 12" | 323.9 | 22.22 | 25.79 | 71.58 | 94.57 | 140.91 | 140.91 |
| 14" | 355.6 | 24.45 | 29.31 | 94.55 | 151.46 | — | 188.90 |
| 16" | 406.4 | 29.72 | 33.68 | 123.27 | 163.68 | — | 216.44 |
| 18" | 457.2 | 33.43 | 37.95 | 154.64 | 206.17 | — | 272.73 |
| 20" | 508.0 | 38.32 | 44.52 | 183.47 | 247.58 | — | 327.90 |
| 24" | 609.6 | 49.55 | 56.77 | 255.34 | 338.63 | — | 448.95 |
Pipe Weight Formula: Weight (kg/m) = (Outside Diameter − Wall Thickness) × Wall Thickness × 0.02466
Request Price ListStainless Steel Pipe Schedule Chart
The table below shows the standard wall thickness for common stainless steel pipe schedules manufactured in accordance with ASME B36.19M and ASTM A312.
| Pipe Schedule | Description | Common Applications |
|---|---|---|
| SCH 5S | Extra Light Wall | Low-pressure services |
| SCH 10S | Light Wall | Food, pharmaceutical & water lines |
| SCH 40S | Standard Wall | General industrial piping |
| SCH 80S | Heavy Wall | High-pressure applications |
| SCH 160 | Extra Heavy Wall | High-temperature & high-pressure systems |
| XXS | Double Extra Strong | Critical industrial applications |
Stainless Steel Pipe Dimensions Chart
The following chart provides the standard outside diameter, inside diameter and wall thickness dimensions for stainless steel seamless pipes.
| NPS (Inch) | Outside Diameter (OD) | Inside Diameter (ID)* | Standard |
|---|---|---|---|
| 1/2" | 21.3 mm | 15.8 mm | ASME B36.19M |
| 3/4" | 26.7 mm | 21.0 mm | ASME B36.19M |
| 1" | 33.4 mm | 26.6 mm | ASME B36.19M |
| 2" | 60.3 mm | 52.5 mm | ASME B36.19M |
| 3" | 88.9 mm | 77.9 mm | ASME B36.19M |
| 4" | 114.3 mm | 102.3 mm | ASME B36.19M |
| 6" | 168.3 mm | 154.1 mm | ASME B36.19M |
| 8" | 219.1 mm | 202.7 mm | ASME B36.19M |
Stainless Steel Pipe Pressure Rating Chart
The pressure rating of stainless steel seamless pipes depends on pipe size, wall thickness, schedule, material grade and operating temperature.
| Pipe Schedule | Pressure Capacity | Typical Service |
|---|---|---|
| SCH 5S | Low | Drainage & low-pressure systems |
| SCH 10S | Medium | Water & process piping |
| SCH 40S | High | Industrial process piping |
| SCH 80S | Very High | Steam & chemical plants |
| SCH 160 | Heavy Duty | Oil & gas pressure lines |
| XXS | Maximum | Critical high-pressure applications |
Chemical Composition of Stainless Steel Seamless Pipes
The following table shows the typical chemical composition of the most commonly used stainless steel seamless pipe grades. Values are specified according to ASTM and ASME material standards.
| Grade | Carbon (%) | Chromium (%) | Nickel (%) | Molybdenum (%) | Manganese (%) | Silicon (%) |
|---|---|---|---|---|---|---|
| 304 | 0.08 Max | 18.0–20.0 | 8.0–10.5 | — | 2.00 Max | 1.00 Max |
| 304L | 0.03 Max | 18.0–20.0 | 8.0–12.0 | — | 2.00 Max | 1.00 Max |
| 316 | 0.08 Max | 16.0–18.0 | 10.0–14.0 | 2.00–3.00 | 2.00 Max | 1.00 Max |
| 316L | 0.03 Max | 16.0–18.0 | 10.0–14.0 | 2.00–3.00 | 2.00 Max | 1.00 Max |
| 321 | 0.08 Max | 17.0–19.0 | 9.0–12.0 | — | 2.00 Max | 1.00 Max |
| 347 | 0.08 Max | 17.0–19.0 | 9.0–13.0 | — | 2.00 Max | 1.00 Max |
| 310S | 0.08 Max | 24.0–26.0 | 19.0–22.0 | — | 2.00 Max | 1.50 Max |
| 904L | 0.02 Max | 19.0–23.0 | 23.0–28.0 | 4.00–5.00 | 2.00 Max | 1.00 Max |
Mechanical Properties of Stainless Steel Seamless Pipes
The table below provides the minimum mechanical properties of commonly used stainless steel seamless pipe grades manufactured in accordance with ASTM A312.
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB Max) |
|---|---|---|---|---|
| 304 | 515 | 205 | 35 | 201 |
| 304L | 485 | 170 | 35 | 201 |
| 316 | 515 | 205 | 35 | 217 |
| 316L | 485 | 170 | 35 | 217 |
| 321 | 515 | 205 | 35 | 217 |
| 347 | 515 | 205 | 35 | 217 |
| 310S | 515 | 205 | 40 | 217 |
| 904L | 490 | 220 | 35 | 215 |
Grades of Stainless Steel Seamless Pipes
- Stainless Steel 304 Seamless Pipes
- Stainless Steel 304L Seamless Pipes
- Stainless Steel 304H Seamless Pipes
- Stainless Steel 310 Seamless Pipes
- Stainless Steel 310S Seamless Pipes
- Stainless Steel 310H Seamless Pipes
- Stainless Steel 316 Seamless Pipes
- Stainless Steel 316L Seamless Pipes
- Stainless Steel 316H Seamless Pipes
Features of Stainless Steel Seamless Pipes
- Excellent corrosion and oxidation resistance
- Seamless construction for improved strength
- Suitable for high-pressure applications
- Reliable performance at elevated temperatures
- Durable Performance with low maintenance
- Available in multiple grades and schedules
- Excellent dimensional accuracy and finish
- Suitable for critical industrial applications
Why Choose Stainless Steel Seamless Pipes?
Stainless Steel Seamless Pipes are preferred for applications requiring high mechanical strength, excellent corrosion resistance and dependable performance under pressure. Since they are manufactured without a welded seam, they offer improved structural integrity and are widely used in industries where reliability and safety are critical. Their availability in multiple grades and schedules also allows engineers to select the most suitable material for different operating conditions.
- Seamless construction for improved strength
- Excellent resistance to corrosion and oxidation
- Suitable for high-pressure and high-temperature service
- Available in ASTM and ASME compliant grades
- Long service life with minimal maintenance
- Ideal for critical industrial applications
Applications of Stainless Steel Seamless Pipes
Stainless Steel Seamless Pipes are designed for applications where high pressure, elevated temperatures and corrosive media demand reliable performance. Their seamless construction eliminates the risk associated with welded joints, making them suitable for transporting liquids, gases, steam, and aggressive chemicals in critical industrial processes. The choice of stainless steel grade depends on the operating environment, pressure requirements, temperature and corrosion conditions.
| Industry | Typical Applications |
|---|---|
| Oil & Gas Industry | Process piping, transmission lines, refinery systems |
| Petrochemical Industry | Chemical transfer and processing systems |
| Power Plant Industry | Boiler tubes, steam lines, heat exchangers |
| Water Treatment | Desalination and water distribution systems |
| Pharmaceutical | Hygienic process piping and fluid transfer |
| Food Processing | Sanitary piping systems and equipment |
| Marine | Seawater handling and offshore installations |
| Chemical Industry | Corrosive fluid and chemical transportation |
Industries We Serve
Kamal Steels supplies Stainless Steel Seamless Pipes to a wide range of industries that require durable, corrosion-resistant piping solutions for critical process systems. Manufactured to international standards and available in multiple grades and schedules, our seamless pipes are used in demanding environments where safety, strength and long service life are essential.
Refineries
Our Stainless Steel Seamless Pipes are extensively used in refineries for high-pressure process piping, hydrocarbon transportation and critical fluid handling systems.
Chemical & Petrochemical Plants
Seamless pipes provide excellent corrosion resistance and strength for handling aggressive chemicals, acids and process fluids.
Power Generation
Power plants rely on seamless pipes for boilers, heat exchangers, steam lines and high-temperature applications.
Engineering Industry
Engineering companies use Stainless Steel Seamless Pipes for heavy-duty equipment, fabrication and precision industrial piping systems.
Offshore Industry
Offshore platforms require seamless pipes for reliable performance under high pressure and corrosive marine environments.
Marine & Shipbuilding
Marine industries utilize seamless pipes for seawater systems, fuel lines and other critical shipboard piping applications.
Pharmaceutical Industry
Pharmaceutical plants use seamless stainless steel pipes where hygiene, corrosion resistance and contamination-free fluid transfer are required.
Oil & Gas Industry
Seamless pipes are widely used for upstream, midstream and downstream oil and gas operations involving high-pressure and demanding service conditions.
Frequently Asked Questions
A stainless steel seamless pipe is manufactured from a solid stainless steel billet without any welded seam. The seamless construction provides superior strength, improved pressure resistance and enhanced reliability compared to welded pipes, making it suitable for critical industrial applications.
Seamless pipes are produced without a weld joint, while welded pipes are manufactured by welding stainless steel strip or plate. Seamless pipes generally offer higher pressure capacity, better structural integrity, and improved performance in demanding service conditions.
ASTM A312 stainless steel seamless pipes are commonly used in Refineries, process plants, power generation facilities and industrial piping systems industries for transporting liquids, gases, steam, and corrosive process fluids.
SS 304 seamless pipes are suitable for general industrial applications and offer excellent corrosion resistance at an economical cost. SS 316 seamless pipes contain molybdenum, providing improved resistance to chlorides, chemicals, and seawater, making them ideal for marine and chemical processing applications.
Stainless steel seamless pipes are typically available from 1/8" NB to 24" NB in various schedules including SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 160 and XXS. Custom sizes may also be available based on project requirements.
Stainless steel seamless pipes are widely used in refineries, petrochemical plants, power stations, pharmaceutical facilities, food processing industries, marine installations, desalination projects and water treatment systems where corrosion resistance and reliability are important.
Because seamless pipes do not have a welded joint, they provide uniform strength throughout the pipe wall. This improves pressure handling capability and reduces the risk of failure in high-pressure and high-temperature operating conditions.
Yes. Stainless steel seamless pipes offer excellent corrosion resistance due to their chromium content. Grades such as SS 316 provide additional resistance against chlorides, chemicals and marine environments, making them suitable for aggressive service conditions.
Stainless steel seamless pipes can be supplied with Mill Test Certificates (MTC) as per EN 10204 3.1, PMI reports, hydro test certificates and third-party inspection reports depending on customer and project requirements.
The correct grade depends on operating temperature, pressure, corrosion exposure and process fluid. SS 304 is suitable for general industrial applications, SS 316 for corrosive environments, SS 321 for high-temperature service and SS 904L for severe corrosion conditions.
ASTM A312 covers seamless and welded austenitic stainless steel pipes used for high-temperature and corrosive service, whereas ASTM A213 covers seamless stainless steel tubes primarily used in boilers, heat exchangers, condensers, and similar applications.
Yes. We can arrange third-party inspection through internationally recognized agencies such as SGS, TUV, Bureau Veritas (BV), DNV, and Lloyd's Register before dispatch.
Yes. We manufacture and supply Stainless Steel Seamless Pipes in custom lengths, outside diameters, wall thicknesses, and schedules according to customer specifications and project requirements.
Yes. Kamal Steels exports Stainless Steel Seamless Pipes to customers across the UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain, Europe, Africa, Southeast Asia, and many other international markets.
The price depends on the stainless steel grade, pipe size, wall thickness, schedule, order quantity, testing requirements, surface finish, and current raw material prices.