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Girgaon, Mumbai - 400004
Stainless Steel Seamless Pipes Manufacturer in India
Stainless Steel Seamless Pipe Manufacturers in India
Kamal Steels is a leading Stainless Steel Seamless Pipe Manufacturers in India, supplying high-quality stainless steel seamless pipes and tubes for industrial, commercial and engineering applications. We offer a comprehensive range of stainless steel seamless pipes in various grades, sizes, schedules and specifications to suit diverse industrial applications.
Our SS seamless pipes are widely used in oil & gas, petrochemical, chemical processing, power generation, marine, pharmaceutical, food processing, and other demanding industries. Our Stainless Steel Seamless Pipes are manufactured using premium quality raw materials and advanced manufacturing processes to ensure superior corrosion resistance, high tensile strength, excellent durability and long service life.
As trusted seamless pipe manufacturers in India, we provide stainless steel pipes and tubes with accurate dimensions, smooth surface finish and reliable performance for high-pressure and high-temperature applications.
Why Stainless Steel Seamless Pipes?
Stainless steel seamless pipes are tubular products manufactured without any welding joints. These pipes are produced using extrusion and rotary piercing processes, making them stronger and more reliable compared to welded pipes. Stainless steel seamless pipes are widely used in industries where high pressure, temperature resistance and corrosion resistance are required.
Stainless steel seamless pipes are preferred for applications where pressure, temperature and corrosion resistance are important. Since they are manufactured without a weld seam, they offer better structural integrity and a smooth internal surface. This makes them suitable for high-performance systems in chemical, oil and gas, power and process industries.
Why Kamal Steels?
Kamal Steels manufactures stainless steel seamless pipes and stainless steel seamless tubes in various grades including 304, 304L, 316, 316L, 321, 347 and 904L. Our seamless steel pipe products comply with international standards and are suitable for critical industrial applications.
Request a QuoteStainless Steel Seamless Pipe Specifications
| Product Name | Stainless Steel Seamless Pipes |
|---|---|
| Brand | Kamal Steels |
| Material | Stainless Steel |
| Type | Seamless Pipe |
| Form | Round, Square, Rectangular |
| Outer Diameter | 6 mm to 610 mm |
| Wall Thickness | 0.5 mm to 50 mm |
| Length | Single Random, Double Random, Cut Length |
| Pipe End | Plain End, Beveled End, Threaded End |
| Surface Finish | Annealed, Pickled, Polished, Bright Annealed |
| Standards | ASTM A312, ASME SA312, ASTM A790, ASME B36.19M |
| Pipe Schedules | SCH 5 to SCH XXS |
Technical Overview
Our stainless steel seamless pipes are suitable for applications that demand accurate dimensions, superior corrosion resistance and dependable mechanical performance. They are supplied for both general engineering and critical process environments. These pipes are widely used where welded alternatives may not be preferred.
Available Grades of Stainless Steel Seamless Pipes
Kamal Steels manufactures the following 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
Stainless Steel Seamless Pipe Manufacturing Process
Stainless Steel Seamless Pipe Manufacturing Process
Stainless steel seamless pipes are manufactured using high-quality stainless steel billets through a hot extrusion and rotary piercing process. Unlike welded pipes, seamless pipes are produced without any welding joint, ensuring higher strength, pressure resistance and durability.
| Step 1 |
Raw Material Selection High-grade stainless steel billets or round bars are selected according to the required grade, size, and application standards. |
|---|---|
| Step 2 |
Heating Process The stainless steel billet is heated at a high temperature in a furnace to make the material soft and workable for pipe formation. |
| Step 3 |
Rotary Piercing The heated billet is pierced using a rotary piercing machine to create a hollow shell. This is the primary step in producing seamless pipes. |
| Step 4 |
Pipe Elongation & Rolling The hollow shell is elongated and rolled through mandrel mills or rolling mills to achieve the required pipe diameter and wall thickness. |
| Step 5 |
Heat Treatment The pipes undergo heat treatment such as annealing or solution annealing to improve strength, corrosion resistance, and mechanical properties. |
| Step 6 |
Sizing & Straightening The pipes are sized accurately and straightened using precision machines to maintain dimensional accuracy and smooth finish. |
| Step 7 |
Testing & Inspection Each seamless pipe is tested through hydrostatic testing, ultrasonic testing, PMI testing, flattening tests, and visual inspection to ensure international quality standards. |
| Step 8 |
Finishing & Packaging The finished pipes are cleaned, marked, polished if required, and packed securely in wooden boxes, bundles, or export-worthy packaging for safe delivery. |
Chemical Composition of 304 and 316 Grades
The chemical composition of stainless steel grades plays a major role in corrosion resistance, strength and service performance. 304 and 316 are the most popular grades for general and corrosive applications.
| Grade | Cr % | Ni % | Mo % | C % | Mn % | Si % | P % | S % |
|---|---|---|---|---|---|---|---|---|
| 304 / 304L | 18.0–20.0 | 8.0–13.0 | — | 0.08 max / 0.03 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max |
| 316 / 316L | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 | 0.08 max / 0.03 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max |
Chemical Composition of High-Temperature Grades
Grades such as 310, 321, 347 and their H versions are designed for elevated-temperature service and improved structural stability. They are widely used in furnaces, heat exchangers and thermal process systems.
Chemical Composition of 904L Grade
904L contains higher nickel and molybdenum content than standard austenitic grades. This gives it excellent resistance to strong acids and severe corrosive environments.
| Grade | Cr % | Ni % | Mo % | C % | Mn % | Si % | P % | S % |
|---|---|---|---|---|---|---|---|---|
| 904L | 19.0–23.0 | 23.0–28.0 | 4.0–5.0 | 0.02 max | 2.0 max | 1.0 max | 0.045 max | 0.035 max |
Stainless Steel Seamless Pipe Size Chart & Stainless Steel Seamless Pipe Dimensions
Schedule 40 and Schedule 80 Seamless Pipes
Schedule 40 and Schedule 80 are among the most commonly used thickness ranges in industrial piping. Schedule 40 is suitable for general applications, while Schedule 80 offers thicker walls for higher pressure and demanding service conditions.
Schedule 40S & Schedule 80S Stainless Steel Seamless Pipe Chart
| Pipe Size | Outside Diameter | SCH 40S WT | SCH 80S WT |
|---|---|---|---|
| 1/8" | 10.3 mm | 1.73 mm | 2.41 mm |
| 1/4" | 13.7 mm | 2.24 mm | 3.02 mm |
| 3/8" | 17.1 mm | 2.31 mm | 3.20 mm |
| 1/2" | 21.3 mm | 2.77 mm | 3.73 mm |
| 3/4" | 26.7 mm | 2.87 mm | 3.91 mm |
| 1" | 33.4 mm | 3.38 mm | 4.55 mm |
| 1 1/4" | 42.2 mm | 3.56 mm | 4.85 mm |
| 1 1/2" | 48.3 mm | 3.68 mm | 5.08 mm |
| 2" | 60.3 mm | 3.91 mm | 5.54 mm |
| 2 1/2" | 73.0 mm | 5.16 mm | 7.01 mm |
| 3" | 88.9 mm | 5.49 mm | 7.62 mm |
| 4" | 114.3 mm | 6.02 mm | 8.56 mm |
| 5" | 141.3 mm | 6.55 mm | 9.52 mm |
| 6" | 168.3 mm | 7.11 mm | 10.97 mm |
| 8" | 219.1 mm | 8.18 mm | 12.70 mm |
| 10" | 273.0 mm | 9.27 mm | 12.70 mm |
| 12" | 323.9 mm | 9.52 mm | 12.70 mm |
| 14" | 355.6 mm | 9.52 mm | 12.70 mm |
| 16" | 406.4 mm | 9.52 mm | 12.70 mm |
| 18" | 457.2 mm | 9.52 mm | 12.70 mm |
| 20" | 508.0 mm | 9.52 mm | 12.70 mm |
| 24" | 609.6 mm | 9.52 mm | 12.70 mm |
Difference Between SCH 40S and SCH 80S Pipes
| Property | SCH 40S | SCH 80S |
|---|---|---|
| Wall Thickness | Standard | Heavy |
| Pressure Capacity | Medium Pressure | High Pressure |
| Weight | Lower | Higher |
| Strength | Moderate | Superior |
| Application Type | General Industrial Use | Heavy-Duty Industrial Use |
| Common Industries | Water, food, pharma | Oil & gas, refinery, petrochemical |
Stainless Steel Seamless Pipe Standards
| ASTM Standards | ASME Standards | ANSI Standards |
|---|---|---|
| ASTM A312 | ASME B36.19M | ANSI B36.19 |
| ASTM A358 | ASME SA312 | - |
| ASTM A790 | ASME SA790 | - |
| ASTM A409 | - | - |
Mechanical Properties of Stainless Steel Seamless Pipes
Tensile Strength
Tensile strength indicates how much stress the pipe can withstand before breaking. Stainless steel seamless pipes generally provide strong tensile performance, making them suitable for pressure and structural applications.
Yield Strength
Yield strength shows the point at which the pipe begins to deform permanently. Good yield strength is important for reliable performance in piping systems exposed to internal pressure and load.
Elongation
Elongation reflects ductility and the pipe’s ability to bend or form without failure. Higher elongation is preferred in fabrication, installation and process service.
| Grade | Tensile Strength (MPa, min) | Yield Strength (MPa, min) | Elongation (% min) |
|---|---|---|---|
| SS 304 | 515 | 205 | 40% |
| SS 304L | 485 | 170 | 40% |
| SS 316 | 515 | 205 | 40% |
| SS 316L | 485 | 170 | 40% |
| SS 321 | 515 | 205 | 40% |
| SS 904L | 490 | 220 | 35% |
Features of Stainless Steel Seamless Pipes
- Excellent Corrosion Resistance: Stainless steel seamless pipes offer excellent resistance against rust, chemicals and moisture, making them suitable for harsh industrial and marine environments.
- High Temperature Strength: These pipes can withstand high temperatures and pressure conditions without losing their mechanical properties in demanding applications.
- Superior Durability: Manufactured without welding joints, seamless pipes provide superior strength, durability and long service life.
- Leak-Proof Construction: The seamless manufacturing process reduces leakage risks and improves performance in critical fluid transportation systems.
- Smooth Surface Finish: Smooth internal and external surfaces improve flow efficiency and reduce scaling or contamination during service.
- High Pressure Handling Capability: Stainless steel seamless pipes are designed to handle high internal pressure and heavy-duty industrial operations.
- Accurate Dimensions: Precision manufacturing ensures uniform wall thickness and accurate dimensions for easy installation and reliable performance.
- Easy Fabrication and Welding: These pipes support cutting, bending, fabrication and welding according to industrial project requirements.
- Long Service Life: Stainless steel seamless pipes provide reliable long-term performance even in aggressive operating conditions.
- Low Maintenance Requirements: Due to their corrosion resistance and strong construction, these pipes require minimal maintenance during service.
Applications of Stainless Steel Seamless Pipes
Stainless steel seamless pipes are widely used in industrial applications where corrosion resistance, high strength and pressure handling capability are required.
Oil & Gas Industry
Used for transporting oil, gas and high-pressure fluids in offshore and onshore operations with reliable performance.
Petrochemical Industry
Widely used in petrochemical plants for handling corrosive chemicals and high-temperature processing systems.
Chemical Processing Plants
Suitable for industrial chemical processing applications requiring strong corrosion resistance and durability.
Power Generation Plants
Used in thermal and power generation systems for steam handling and high-temperature piping applications.
Heat Exchangers
Preferred for heat exchanger systems because of their smooth finish and temperature resistance properties.
Boilers
These pipes are suitable for boiler systems operating under high pressure and demanding temperature conditions.
Water Treatment Plants
Used in desalination and water treatment systems because of their corrosion-resistant and hygienic properties.
Pharmaceutical Industry
Ideal for pharmaceutical applications requiring clean, contamination-free and durable piping systems.
Food Processing Industry
Widely used in food and beverage industries due to hygienic surfaces and corrosion resistance performance.
Marine Industry
Marine environments require corrosion-resistant piping systems capable of handling seawater exposure efficiently.
Construction Industry
Used in industrial and structural construction projects because of their strength and long service life.
Industries We Serve
Kamal Steels supplies stainless steel seamless pipes & tubes to various industries worldwide for high-pressure and corrosion-resistant applications.
Refineries
Our stainless steel seamless pipes are widely used in refinery applications for transporting high-pressure fluids and chemicals safely.
Fertilizer Plants
Fertilizer industries require corrosion-resistant piping systems for chemical processing and industrial operations.
Cement Plants
These seamless pipes are suitable for demanding cement manufacturing and material handling systems.
Engineering Industry
Engineering sectors use stainless steel seamless pipes for fabrication and industrial piping systems.
Offshore Industry
Offshore applications require durable and corrosion-resistant piping solutions for marine environments.
Automobile Industry
Automobile industries use seamless pipes in exhaust systems and industrial fluid transportation applications.
Packaging, Testing & Inspection
Packaging
- Wooden Boxes: Stainless steel seamless pipes are packed securely in wooden boxes to prevent damage during transportation and export handling.
- Bundles Packing: Pipes are bundled properly for easy loading, unloading and safe storage during shipment.
- Plastic End Caps: Plastic caps are provided on pipe ends to protect against dust, moisture and external damage.
- Export Standard Packaging: All products are packed according to international export standards for safe worldwide delivery.
- Bubble Wrap Protection: Bubble wrapping provides additional surface protection during transportation and material handling.
Testing & Inspection
- Hydrostatic Testing: Ensures the pipe can withstand high internal pressure without leakage or failure.
- Ultrasonic Testing: Detects internal defects and confirms structural integrity of stainless steel seamless pipes.
- PMI Testing: Positive Material Identification verifies the chemical composition and material grade accuracy.
- Flattening Test: Checks pipe flexibility and resistance to cracking under deformation conditions.
- Flaring Test: Evaluates pipe expansion capability and forming performance for fabrication applications.
- Intergranular Corrosion Test: Confirms corrosion resistance performance in aggressive industrial environments.
- Third Party Inspection: Independent inspection agencies verify quality, dimensions and testing compliance.
Why Kamal Steels is a Preferred Choice for Stainless Steel Seamless Pipes? ?
Kamal Steels is known as a reliable stainless steel seamless pipe manufacturer in India because of our premium quality products, competitive prices, timely delivery and customer satisfaction. We maintain strict quality control procedures and provide stainless steel pipes and tubes that meet international standards for industrial applications.
Frequently Asked Questions
Kamal Steels is a leading stainless steel seamless pipe manufacturer in India, supplying high-quality pipes for oil & gas, petrochemical, chemical, power and engineering industries. With decades of experience, Kamal Steels serves both domestic and international customers.
The HS code for stainless steel seamless pipe generally falls under 7304. Kamal Steels can help buyers identify the right product specification based on pipe grade, size and application for trade and export requirements.
The price of stainless steel seamless pipe from Kamal Steels depends on the grade, size, wall thickness, schedule, quantity and inspection requirements. For an accurate quotation, buyers can request pricing based on their project specification.
Kamal Steels offers stainless steel seamless pipes in a wide range of sizes, schedules and thicknesses to suit different industrial applications. Sizes are available in standard as well as custom requirements depending on the project need.
A stainless steel seamless pipe is manufactured without any welded seam, which gives it better strength, pressure handling and corrosion resistance. It is widely used in demanding industrial applications where performance and reliability are critical.
We supply stainless steel seamless pipes in grades such as 304, 304L, 304H, 310, 310S, 310H, 316, 316L, 316H, 316Ti, 317, 317L, 321, 321H, 347, 347H and 904L. These grades are selected based on temperature, corrosion resistance and application requirements.
Our seamless pipes are supplied in accordance with ASTM and ASME standards, including ASTM A312, ASTM A790 and ASME B36.19M. These standards ensure consistent quality, dimensions and performance.
We offer stainless steel seamless pipes in a wide range of sizes, wall thicknesses and schedules, including Sch 10S, Sch 40S, Sch 80S and other project-specific requirements. Custom sizes can also be provided based on customer specifications.
Stainless steel seamless pipes are used in oil and gas, chemical, petrochemical, power generation, marine, food processing and pharmaceutical industries. They are preferred for their durability, corrosion resistance and suitability for high-pressure service.
You can request a quote from Kamal Steels by sharing your required grade, size, schedule, quantity and application details. Our team will review your requirements and provide the most suitable product and pricing option.