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Girgaon, Mumbai - 400004
Stainless Steel Welded Pipes Manufacturer in India
Stainless Steel Welded Pipe Manufacturers in India
Kamal Steels is a leading Stainless Steel Welded Pipe Manufacturers in India, supplying high-quality stainless steel welded pipes and tubes for industrial, commercial and engineering applications. Established in 1984, we have decades of experience in manufacturing and supplying stainless steel piping solutions to customers across domestic and international markets.
We offer a comprehensive range of stainless steel welded pipes in various grades, sizes, schedules and specifications to suit diverse industrial applications. Our SS welded pipes are widely used in oil & gas, petrochemical, chemical processing, power generation, marine, pharmaceutical, food processing and other demanding industries.
Our Stainless Steel Welded Pipes are manufactured using premium quality stainless steel coils and advanced welding technology to ensure superior corrosion resistance, excellent dimensional accuracy, high strength and long service life. All products are supplied according to international ASTM, ASME and ANSI standards with strict quality control and testing procedures.
As trusted welded pipe manufacturers in India, we provide pipes and tubes with smooth surface finish, reliable performance and precision manufacturing for low, medium and high-pressure industrial applications. Our commitment to product quality, timely delivery, competitive pricing and customer satisfaction has made Kamal Steels a preferred choice in the stainless steel piping industry since 1984.
Why Stainless Steel Welded Pipes?
Stainless steel welded pipes are tubular products manufactured by forming stainless steel coils or plates into a cylindrical shape and welding the seam using advanced welding processes. These pipes provide excellent dimensional accuracy, smooth surface finish and reliable mechanical strength for various industrial applications. Stainless steel welded pipes are widely used in industries where corrosion resistance, durability and cost-effective piping solutions are required.
Stainless steel welded pipes are preferred for applications where consistent quality, accurate dimensions and efficient performance are important. Modern welding technology ensures strong and reliable welded joints with excellent structural integrity. These pipes are suitable for chemical processing, oil & gas, water treatment, food processing, pharmaceutical, construction and general engineering industries.
Why Kamal Steels?
Kamal Steels manufactures stainless steel welded pipes and stainless steel welded tubes in various grades including 304, 304L, 316, 316L, 321, 347 and 904L. Our welded steel pipe products comply with international standards and are suitable for critical industrial applications.
Request a QuoteStainless Steel Welded Pipe Specifications
| Product Name | Stainless Steel Welded Pipes |
|---|---|
| Brand | Kamal Steels |
| Material | Stainless Steel |
| Type | Welded Pipe |
| Form | Round, Square, Rectangular |
| Outer Diameter | 6 mm to 610 mm |
| Wall Thickness | 0.5 mm to 40 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, ASTM A358, ASME SA312, ASME B36.19M |
| Pipe Schedules | SCH 5 to SCH XXS |
Technical Overview
Our stainless steel welded pipes are suitable for applications that require accurate dimensions, excellent corrosion resistance and reliable mechanical performance. They are supplied for both general engineering and industrial process applications where consistent quality and cost-effective piping solutions are important. These ss welded pipe are widely used in chemical processing, water treatment, food processing, construction and structural applications.
Available Grades of Stainless Steel Welded Pipes
Kamal Steels manufactures the following grades of Stainless Steel Welded Pipes:
- Stainless Steel 304 Welded Pipes
- Stainless Steel 304L Welded Pipes
- Stainless Steel 304H Welded Pipes
- Stainless Steel 310 Welded Pipes
- Stainless Steel 310S Welded Pipes
- Stainless Steel 310H Welded Pipes
- Stainless Steel 316 Welded Pipes
- Stainless Steel 316L Welded Pipes
- Stainless Steel 316H Welded Pipes
Stainless Steel Pipe Seamless vs Welded
The comparison between stainless steel pipe seamless vs welded depends on the manufacturing process, pressure requirements, application and cost. Seamless pipes are manufactured without any welded joint, while welded pipes are produced by forming stainless steel coils or plates and welding the seam using advanced welding techniques.
Stainless steel seamless pipes are generally preferred for high-pressure, high-temperature and critical industrial applications because they offer superior strength and uniform structure. These pipes are widely used in oil & gas, petrochemical, power generation and refinery industries where maximum reliability is required.
On the other hand, stainless steel welded pipes provide excellent dimensional accuracy, smooth surface finish and cost-effective performance for general industrial and commercial applications. Modern welding technology ensures strong weld seams and reliable mechanical properties, making welded pipes suitable for water treatment, food processing, pharmaceutical, construction and structural applications.
Difference Between Stainless Steel Seamless and Welded Pipes
| Property | Seamless Pipes | Welded Pipes |
|---|---|---|
| Manufacturing Process | Manufactured without welding | Manufactured using welded seam |
| Strength | Higher pressure strength | Good mechanical strength |
| Surface Finish | Smooth internal finish | Smooth external and internal finish |
| Cost | Higher | More economical |
| Dimensional Accuracy | Moderate | Excellent |
| Pressure Handling | Suitable for high pressure | Suitable for low to medium pressure |
| Applications | Critical industrial service | General industrial applications |
| Availability | Limited large sizes | Wide range of sizes available |
Both seamless and welded stainless steel pipes offer excellent corrosion resistance and durability. The selection depends on operating pressure, temperature, application requirements and budget.
Stainless Steel Welded Pipe Manufacturing Process
Understanding the Stainless Steel Welded Pipe Manufacturing Process
Stainless Steel Welded Pipes are manufactured using high-quality stainless steel billets through a hot extrusion and rotary piercing process. Unlike welded pipes, Welded Pipes are produced without any welding joint, ensuring higher strength, pressure resistance and durability.
| Step 1 |
Raw Material Selection High-quality stainless steel coils or sheets are selected according to the required grade, size and application. |
|---|---|
| Step 2 |
Coil Uncoiling & Slitting The stainless steel coil is uncoiled and slit into the required width to match pipe dimensions. |
| Step 3 |
Forming The slit strip is gradually formed into a round pipe shape using forming rollers. |
| Step 4 |
Welding The formed edges are welded using TIG, laser or high-frequency welding processes to create a strong and continuous seam. |
| Step 5 |
Sizing & Straightening The welded pipe is sized accurately and straightened using precision machinery. |
| Step 6 |
Heat Treatment The pipes undergo annealing or solution annealing to improve corrosion resistance and mechanical properties. |
| Step 7 |
Testing & Inspection Each welded pipe is tested through hydrostatic testing, eddy current testing, PMI testing and visual inspection. |
| Step 8 |
Finishing & Packaging The finished pipes are cleaned, polished if required and packed securely for safe delivery. |
Chemical Composition of 304 and 316 Grades
The chemical composition of stainless steel welded pipe grades plays an important role in corrosion resistance, weldability, strength and overall service performance. Grades 304 and 316 are widely used for industrial and commercial welded pipe applications.
| Grade | Cr % | Ni % | Mo % | C % |
|---|---|---|---|---|
| 304 / 304L | 18.0–20.0 | 8.0–13.0 | — | 0.08 max / 0.03 max |
| 316 / 316L | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 | 0.08 max / 0.03 max |
Chemical Composition of High-Temperature Grades
Grades such as 310, 321, 347 and their H versions are designed for high-temperature service and improved structural stability. These grades are widely used in furnaces, heat exchangers, boilers and thermal processing systems where elevated temperature resistance is required.
Chemical Composition of 904L Grade
904L stainless steel contains higher nickel and molybdenum content compared to standard austenitic grades. This provides excellent resistance to strong acids, chloride attack and highly corrosive industrial 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 Welded Pipes
Schedule 40 and Schedule 80 are among the most commonly used thickness ranges in stainless steel welded piping systems. Schedule 40 welded pipes are suitable for general industrial and commercial applications, while Schedule 80 welded pipes provide 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 A778 | ASME SA778 | - |
| ANSI B36.19 | - | - |
Mechanical Properties of Stainless Steel Welded Pipes
Tensile Strength
Tensile strength indicates how much stress the welded pipe can withstand before breaking. Stainless steel welded pipes provide reliable tensile performance for structural and industrial piping applications.
Yield Strength
Yield strength shows the stress level at which the pipe starts permanent deformation. Good yield strength ensures safe performance in pressure and load-bearing applications.
Elongation
Elongation reflects the ductility and forming capability of stainless steel welded pipes. Higher elongation allows easier fabrication, bending and installation.
| 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 Welded Pipes
- Excellent Corrosion Resistance: Stainless Steel Welded 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, Welded 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 Welded 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 Welded 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 Welded Pipes
Stainless Steel Welded 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 Welded Pipes & tubes to various industries worldwide for high-pressure and corrosion-resistant applications.
Refineries
Our Stainless Steel Welded 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 Welded Pipes are suitable for demanding cement manufacturing and material handling systems.
Engineering Industry
Engineering sectors use Stainless Steel Welded 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 Welded Pipes in exhaust systems and industrial fluid transportation applications.
Packaging, Testing & Inspection
Packaging
- Wooden Boxes: Stainless Steel Welded 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 Welded 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 Welded 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 Welded 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 Welded 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 Welded 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 Welded 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 Welded 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.