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Girgaon, Mumbai - 400004
Stainless Steel ERW Pipe Manufacturer in India
Kamal Steels is a Stainless Steel ERW Pipe Manufacturer in India, serving customers looking for reliable ERW Pipe Manufacturers for industrial, commercial, fabrication, process and infrastructure applications. ERW Pipes are manufactured by forming stainless steel strip or coil into a cylindrical shape and joining the longitudinal edges using Electric Resistance Welding.
We supply stainless steel ERW pipes in commonly required grades, sizes, wall thicknesses and specifications according to applicable ASTM, ASME and other international standards. Depending on project requirements, pipes can be supplied with material test certificates, inspection documentation, testing reports and export-ready packaging.
Our stainless steel ERW pipe range includes grades such as 304, 304L, 316, 316L, 321, 347, 310S and 904L, subject to size, specification and availability.
ERW Pipe Manufacturer in India
Kamal Steels supplies stainless steel ERW pipes to customers in India and international markets. Our supply process focuses on material identification, dimensional requirements, inspection, documentation, packaging, and reliable dispatch.
We can support requirements for stainless steel welded pipes in different grades, sizes, wall thicknesses, schedules, finishes and applicable standards. Customers can specify their requirements according to project drawings, purchase specifications, or applicable engineering standards.
- Stainless steel ERW pipes
- Stainless steel welded pipes
- Industrial welded pipes
- Different NPS and DN sizes
- Various wall thicknesses and schedules
- ASTM and ASME specifications
- Material Test Certificates and inspection documentation
- Export packaging and shipment requirements
What Is an ERW SS Pipe?
An ERW SS Pipe is a stainless steel welded pipe produced by forming a flat stainless steel strip or coil into a tubular shape and joining the edges through an electric resistance welding process.
Unlike a seamless pipe, an ERW Pipe has a longitudinal welded joint. The manufacturing process allows the pipe to be produced with controlled outside diameter, wall thickness and dimensional consistency across different sizes.
Stainless Steel ERW Pipes are available in different grades, sizes, schedules, and wall thicknesses for applications where welded stainless steel pipe construction is suitable.
ERW Pipe Full Form
ERW stands for Electric Resistance Welded. ERW Steel Pipes are produced by forming a flat steel strip into a tubular shape and joining the longitudinal edges using electrical resistance welding.
The same manufacturing principle is used for different steel materials, including carbon steel and stainless steel. For stainless steel applications, the finished product is commonly referred to as a Stainless Steel ERW pipe.
Stainless Steel Welded Pipes
Stainless Steel Welded Pipes are manufactured by forming stainless steel sheet, strip, or coil and joining the edges through a welding process.
ERW is one type of welded pipe manufacturing process. Depending on the material, size, specification, and application, stainless steel welded pipes can be manufactured using different welding methods.
ERW vs Seamless Stainless Steel Pipe
| Feature | ERW Pipe | Seamless Pipe |
|---|---|---|
| Manufacturing | Formed strip or coil with a longitudinal weld | Produced without a longitudinal weld |
| Weld | Longitudinal welded joint | No longitudinal weld |
| Dimensional Control | Generally consistent | Depends on the manufacturing process |
| Production | Efficient for suitable sizes | More manufacturing-intensive |
| Applications | Industrial, fabrication, process and general applications | Applications where seamless construction is specified |
| Cost | Often economical for suitable requirements | Generally higher for comparable requirements |
Neither type is universally better. The appropriate pipe depends on pressure, temperature, corrosion conditions, size, material grade, applicable specification, and project requirements.
ERW Pipe Standard
The required ERW pipe standard depends on the application, material grade, pipe dimensions, manufacturing method, and project specification.
| Standard / Specification | General Application |
|---|---|
| ASTM A312 / ASME SA312 | Stainless steel pipe requirements, including seamless and welded pipe |
| ASTM A358 | Electric-fusion-welded austenitic chromium-nickel alloy steel pipe |
| ASTM A554 | Welded stainless steel mechanical tubing |
| ASTM A249 | Welded austenitic steel boiler, heat-exchanger and condenser tubes |
| ASME Standards | Requirements referenced by engineering and industrial projects |
| ASME B36.19M | Stainless steel pipe dimensions |
The exact specification should be confirmed against the customer's drawing, purchase specification, applicable code, and required service conditions.
ERW Pipe Size Chart
Stainless steel ERW pipes are available in different nominal pipe sizes depending on the manufacturing range and applicable specification.
| NPS | DN | Nominal Outside Diameter |
|---|---|---|
| 1/2" | 15 | 21.3 mm |
| 3/4" | 20 | 26.7 mm |
| 1" | 25 | 33.4 mm |
| 1 1/4" | 32 | 42.2 mm |
| 1 1/2" | 40 | 48.3 mm |
| 2" | 50 | 60.3 mm |
| 2 1/2" | 65 | 73.0 mm |
| 3" | 80 | 88.9 mm |
| 4" | 100 | 114.3 mm |
| 5" | 125 | 141.3 mm |
| 6" | 150 | 168.3 mm |
| 8" | 200 | 219.1 mm |
| 10" | 250 | 273.1 mm |
| 12" | 300 | 323.9 mm |
Actual manufacturing and stock availability can vary according to grade, thickness, finish, specification and quantity.
ERW Pipe Thickness Chart
ERW pipe wall thickness is selected according to the required nominal pipe size and applicable schedule or customer-specified dimensions.
| NPS | Schedule 10S | Schedule 40S | Schedule 80S |
|---|---|---|---|
| 1/2" | 2.11 mm | 2.77 mm | 3.73 mm |
| 3/4" | 2.11 mm | 2.87 mm | 3.91 mm |
| 1" | 2.77 mm | 3.38 mm | 4.55 mm |
| 1 1/4" | 2.77 mm | 3.56 mm | 4.85 mm |
| 1 1/2" | 2.77 mm | 3.68 mm | 5.08 mm |
| 2" | 2.77 mm | 3.91 mm | 5.54 mm |
| 3" | 2.77 mm | 5.49 mm | 7.62 mm |
| 4" | 2.77 mm | 6.02 mm | 8.56 mm |
| 6" | 2.77 mm | 7.11 mm | 10.97 mm |
| 8" | 3.05 mm | 8.18 mm | 12.70 mm |
| 10" | 3.40 mm | 9.27 mm | 15.09 mm |
| 12" | 3.96 mm | 9.53 mm | 17.48 mm |
Pipe thickness should be verified against the applicable dimensional standard because stainless steel pipe schedules and dimensions vary according to the relevant standard.
ERW Pipe Weight Chart
The ERW Pipe Weight Chart helps estimate the approximate weight of stainless steel ERW pipes based on pipe size and wall thickness. Pipe weight is useful for material estimation, transportation planning, structural calculations, and purchase requirements.
| Pipe Size | Outside Diameter (mm) | Wall Thickness (mm) | Approx. Weight (kg/m) |
|---|---|---|---|
| 1/2" | 21.3 | 2.11 | 1.02 |
| 3/4" | 26.7 | 2.11 | 1.30 |
| 1" | 33.4 | 2.77 | 2.11 |
| 1 1/2" | 48.3 | 2.77 | 3.12 |
| 2" | 60.3 | 2.77 | 3.94 |
| 3" | 88.9 | 3.05 | 6.52 |
| 4" | 114.3 | 3.05 | 8.46 |
| 6" | 168.3 | 3.40 | 13.93 |
For a more accurate calculation, pipe weight can be estimated from the outside diameter, inside diameter, wall thickness and material density. The theoretical weight per metre is calculated using:
Weight per metre = π/4 × (OD² − ID²) × Density
Where OD is the outside diameter, ID is the inside diameter and density represents the density of the stainless steel grade. Actual weight can vary according to manufacturing tolerances, grade, dimensions and applicable standards.
For project-specific requirements, Kamal Steels can supply ERW pipes according to the required size, wall thickness, grade and specification.
ERW Pipe Specification
The SS ERW pipe specification defines the material grade, dimensions, manufacturing requirements, testing, finish, and applicable standard.
| Parameter | Specification |
|---|---|
| Product | Stainless Steel ERW Pipe |
| Type | Electric Resistance Welded |
| Material | Stainless Steel |
| Grades | 304, 304L, 316, 316L, 321, 347, 310S, 904L and others as required |
| Size | NPS / DN sizes as required |
| Outside Diameter | As per applicable dimensional standard |
| Wall Thickness | Schedule or specified thickness |
| Length | Standard or specified length |
| Surface | Mill, pickled, polished or specified finish where applicable |
| Standards | ASTM / ASME and applicable project specifications |
| Testing | Dimensional, visual and other specified tests |
| Documentation | MTC / inspection documents as applicable |
| Packaging | Standard or export packaging |
Key Benefits
Stainless steel ERW pipes provide several advantages where welded construction is appropriate for the intended service.
- Consistent pipe dimensions
- Controlled wall thickness
- Longitudinal welded construction
- Availability in multiple stainless steel grades
- Suitable for fabrication and industrial applications
- Efficient manufacturing process
- Available in different sizes and thicknesses
- Good corrosion resistance depending on the selected grade
- Suitable for specified process and fluid-handling applications
- Can be supplied with inspection and material documentation
Key Features
- Electric resistance welded construction
- Stainless steel material
- Multiple grades and sizes
- Various wall thickness options
- ASTM and ASME specifications
- Suitable for industrial and fabrication requirements
- Material traceability and documentation where specified
- Inspection and testing options according to project requirements
Common Grades
The stainless steel grade should be selected according to corrosion conditions, temperature, mechanical requirements, fabrication requirements, and the applicable standard.
| Grade | General Characteristics |
|---|---|
| SS 304 | General-purpose austenitic stainless steel with good corrosion resistance |
| SS 304L | Low-carbon version of 304, commonly selected for welded applications |
| SS 316 | Higher corrosion resistance than 304 in many environments |
| SS 316L | Low-carbon 316 grade widely used in welded applications |
| SS 321 | Titanium-stabilized stainless steel suitable for elevated-temperature applications |
| SS 347 | Niobium-stabilized stainless steel used for elevated-temperature applications |
| SS 310S | High-temperature stainless steel grade |
| SS 904L | Highly alloyed stainless steel with strong corrosion resistance in demanding environments |
Common Applications
Stainless steel ERW pipes are used in industries where corrosion resistance, dimensional consistency, weldability, and suitable mechanical properties are required.
- Oil & Gas
- Chemical Processing
- Petrochemical Plants
- Power Plants
- Refineries
- Water and Process Systems
- Food Processing
- Pharmaceutical Equipment
- Construction
- Industrial Fabrication
- General Engineering
- Process Piping
What Is ERW Pipe Used For?
ERW pipes are used for industrial piping, process systems, fabrication, structural applications, fluid handling and other services where a welded stainless steel pipe meets the required design and specification.
The suitability of an ERW pipe depends on operating pressure, temperature, fluid characteristics, corrosion conditions, pipe dimensions, material grade, applicable engineering standards, and the requirements of the specific project.
Why Choose Kamal Steels for Stainless Steel ERW Pipes?
Kamal Steels supplies stainless steel ERW pipes for industrial and commercial requirements, with attention to material identification, dimensional requirements, inspection, documentation, packaging, and delivery.
Customers can specify their requirements based on:
- Stainless steel grade
- Pipe size
- Wall thickness
- Schedule
- Length
- Surface finish
- Applicable ASTM / ASME specification
- Quantity
- Testing and inspection requirements
- Documentation requirements
- Packaging requirements
Our supply capability supports Indian and export requirements, subject to product availability and specification.
Conclusion
Kamal Steels is a Stainless Steel ERW Pipe Manufacturers in India offering welded stainless steel pipes in commonly required grades, sizes, thicknesses, and specifications.
ERW pipes provide a practical option for applications where longitudinal welded construction is suitable and where dimensional consistency, corrosion resistance, fabrication requirements, and project specifications need to be considered.
For a stainless steel ERW pipe enquiry, provide the grade, NPS/DN size, wall thickness or schedule, length, standard, quantity and application requirement so the appropriate material can be offered.
Stainless Steel ERW Pipe FAQs
An ERW stainless steel pipe is a welded pipe manufactured by forming stainless steel strip or coil into a tubular shape and joining the longitudinal edges using Electric Resistance Welding.
ERW stands for Electric Resistance Welded. The term describes the electrical resistance welding process used to join the edges of the formed steel strip.
Common stainless steel ERW pipe grades include SS 304, 304L, 316, 316L, 321, 347, 310S and 904L, subject to the required size, specification and availability.
Stainless steel ERW pipes can be supplied according to applicable ASTM, ASME and dimensional standards depending on the grade, size, manufacturing requirements and intended application.
Stainless steel ERW pipes are available in different nominal pipe sizes, outside diameters and wall thicknesses. The available range depends on the grade, manufacturing specification and order requirements.
ERW pipe weight is generally calculated from the outside diameter, inside diameter, wall thickness and material density. The resulting value represents the theoretical weight, while actual supplied weight can vary within applicable manufacturing tolerances.
ERW pipes are manufactured by forming strip or coil and joining the longitudinal edges by resistance welding, while seamless pipes are produced without a longitudinal welded joint. The suitable type depends on the application, specification, dimensions and service requirements.
Stainless steel ERW pipes are used in industrial fabrication, process systems, infrastructure, commercial installations, chemical applications and other projects where welded stainless steel pipe is suitable.
Yes. Depending on the order and applicable specification, stainless steel ERW pipes can be supplied with material test certificates, inspection documentation and relevant testing reports.
Kamal Steels manufactures and supplies stainless steel ERW pipes in India in commonly required grades, sizes and specifications, subject to production and stock availability.