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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 provide excellent resistance against rust, chemicals and moisture, making them suitable for corrosive industrial and marine environments.
- Smooth Surface Finish: These pipes offer smooth internal and external surface finish which improves flow efficiency and reduces contamination during industrial operations.
- High Dimensional Accuracy: Advanced manufacturing and welding processes ensure precise dimensions, uniform wall thickness and reliable performance.
- Strong Welded Seam: Modern welding technology creates strong and durable welded seams suitable for industrial pressure and structural applications.
- Cost-Effective Solution: Stainless Steel Welded Pipes are considered an economical piping solution for industrial, commercial and structural applications.
- Good Fabrication Properties: These pipes support easy cutting, bending, fabrication and welding according to project and industrial requirements.
- High Durability: Stainless Steel Welded Pipes provide long-lasting performance and mechanical strength even in demanding operating conditions.
- Easy Installation: Accurate dimensions and lightweight construction make Stainless Steel Welded Pipes easy to transport, handle and install.
Applications of Stainless Steel Welded Pipes
Stainless Steel Welded Pipes are widely used in industrial applications requiring corrosion resistance, dimensional accuracy and reliable performance.
Oil & Gas Industry
Used for fluid transportation systems, refinery piping and industrial process applications in oil & gas industries.
Petrochemical Industry
Widely used in petrochemical plants for handling chemicals, gases and high-temperature industrial operations.
Chemical Processing Plants
Suitable for chemical processing applications requiring corrosion-resistant and durable piping systems.
Power Generation Plants
Used in thermal and industrial power systems for steam, water and process piping applications.
Heat Exchangers
Preferred for heat exchanger systems because of their smooth surface finish and reliable heat resistance properties.
Water Treatment Plants
Used in water treatment and desalination systems because of their corrosion resistance and hygienic properties.
Pharmaceutical Industry
Ideal for pharmaceutical industries requiring clean, contamination-free and reliable piping systems.
Food Processing Industry
Widely used in food and beverage processing industries because of hygienic surfaces and corrosion resistance.
Marine Industry
Marine applications require corrosion-resistant welded pipes capable of handling seawater and harsh environmental conditions.
Construction Industry
Used in industrial construction, structural applications and commercial building projects because of strength and durability.
Industries We Serve
Kamal Steels supplies Stainless Steel Welded Pipes & tubes to various industries worldwide for industrial and structural applications.
Refineries
Our Stainless Steel Welded Pipes are widely used in refinery systems for transporting chemicals, fluids and industrial gases safely.
Fertilizer Plants
Fertilizer industries use welded pipes for chemical handling and corrosion-resistant industrial piping systems.
Cement Plants
These welded pipes are suitable for cement manufacturing plants and industrial material handling systems.
Engineering Industry
Engineering sectors use Stainless Steel Welded Pipes for fabrication, process piping and industrial applications.
Offshore Industry
Offshore industries require durable and corrosion-resistant welded piping systems for marine environments.
Shipbuilding Industry
Shipbuilding applications use Stainless Steel Welded Pipes for fluid transportation and marine structural systems.
Automobile Industry
Automobile industries use welded pipes in exhaust systems, fabrication and industrial fluid handling applications.
Paper & Pulp Industry
Paper and pulp industries require Stainless Steel Welded Pipes for chemical processing and industrial production systems.
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 handling damage.
- Export Standard Packaging: All products are packed according to international export standards for safe worldwide delivery.
Testing & Inspection
- Hydrostatic Testing: Ensures the welded pipe can withstand internal pressure without leakage or structural failure.
- Eddy Current Testing: Detects surface and subsurface defects in welded pipes to ensure product quality and weld integrity.
- PMI Testing: Positive Material Identification verifies the chemical composition and grade accuracy of Stainless Steel Welded Pipes.
- Flattening Test: Checks pipe flexibility, weld strength and resistance to cracking under deformation conditions.
- Visual Inspection: Each pipe undergoes visual inspection to confirm surface quality, dimensions and weld finish.
- Third Party Inspection: Independent inspection agencies verify product quality, dimensions and testing compliance according to international standards.
Why Kamal Steels is a Preferred Choice for Stainless Steel Welded Pipes? ?
Kamal Steels is known as a reliable stainless steel welded 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 welded pipes and tubes that meet international standards.
Frequently Asked Questions
Kamal Steels is a leading stainless steel welded pipe manufacturer in India, supplying high-quality welded pipes for oil & gas, petrochemical, chemical, power and engineering industries. We serve both domestic and international customers with reliable piping solutions.
The HS code for stainless steel welded pipe generally falls under 7306. Kamal Steels helps buyers identify the correct product specification based on pipe grade, size and industrial application requirements.
The price of stainless steel welded pipe depends on the grade, size, wall thickness, schedule, finish and quantity requirements. Buyers can contact Kamal Steels for the latest pricing and quotation based on project specifications.
Kamal Steels offers stainless steel welded pipes in a wide range of sizes, wall thicknesses and schedules for industrial and commercial applications. Custom sizes are also available as per customer requirements.
A stainless steel welded pipe is manufactured by rolling stainless steel coils or plates into a cylindrical shape and welding the seam using advanced welding processes. These pipes provide excellent strength, corrosion resistance and dimensional accuracy.
We supply stainless steel welded pipes in grades such as 304, 304L, 310, 310S, 316, 316L, 321, 347 and 904L. These grades are selected according to corrosion resistance, temperature and application requirements.
Our welded pipes are manufactured according to ASTM and ASME standards including ASTM A312, ASTM A358, ASTM A778 and ASME B36.19M to ensure consistent quality and performance.
We offer stainless steel welded pipes in multiple sizes, wall thicknesses and schedules including Sch 10S, Sch 40S and Sch 80S. Custom specifications can also be supplied for project requirements.
Stainless steel welded pipes are widely used in oil & gas, chemical processing, food processing, pharmaceutical, water treatment, construction and marine industries because of their corrosion resistance and durability.
You can request a quote from Kamal Steels by sharing your required grade, size, schedule, quantity and application details. Our team will provide the most suitable product and pricing solution for your requirement.