Home > Welded Pipes > ERW (Electric Resistance Welded) Pipes
Inox Steel India is one of the leading manufacturers, suppliers, and exporters of ERW (Electric Resistance Welded) Pipes, supplying to major industries across the GCC, Middle East, African nations, European countries, and North & South America.
Our ERW Pipes are produced using high-quality Carbon Steel, Mild Steel, and Stainless Steel grades, strictly conforming to ASTM A53, ASTM A500, ASTM A312 (ERW variants), IS 3589, IS 1239, and API 5L standards.
With ISO certification, IBR compliance (for SS grades), and strong quality control systems, every ERW pipe manufactured at Inox Steel India undergoes precision forming, high-frequency welding, cold sizing, heat treatment (where applicable), and mandatory hydrostatic testing — ensuring reliability, uniformity, and dimensional accuracy for low and medium-pressure service.
Our ERW Pipes are extensively used in water transportation, fire-fighting systems, structural fabrication, general engineering, mechanical frameworks, furniture, and light process industries, where consistency, weld integrity, and mill test documentation are mandatory.
An ERW (Electric Resistance Welded) pipe is a longitudinally welded steel pipe manufactured by passing high-frequency electrical current through the edges of a steel strip until they heat and fuse together — forming a clean, strong, and uniform weld without the use of filler metal.
ERW Pipes offer excellent roundness, straightness, dimensional stability, and a smooth internal bore, making them ideal for high-volume, low-to-medium pressure applications such as water lines, structural columns, fabrication supports, and mechanical assemblies.
The ERW Pipe manufacturing process is fully automated and includes:
This controlled manufacturing process ensures superior weld consistency and uniform mechanical properties along the entire pipe length.
Just as seamless pipes have unique advantages over welded pipes, ERW Pipes offer their own engineering benefits, especially in cost-sensitive and low/medium-pressure applications:
✔ High Dimensional Accuracy
Cold forming and automated welding deliver precise OD, thickness, and straightness.
✔ Smooth Internal Surface
Minimal weld bead → lower friction loss → better water flow and lower scaling.
✔ Superior Weld Quality
High-frequency welding produces a clean, narrow heat-affected zone (HAZ).
✔ Cost-Effective for Bulk Projects
ERW technology is ideal for long-run production → lower cost per meter.
✔ Lightweight Yet Strong
Perfect for structural, architectural, and mechanical support systems.
✔ Environmentally Efficient Manufacturing
No filler metal, no flux — clean and sustainable production.
These advantages make ERW pipes the preferred choice for water lines, civil engineering, scaffolding, HVAC supports, furniture frames, and utility services worldwide.
Inox Steel India manufactures and exports ERW Pipes in the following standards:
These standards define chemical composition, mechanical strength, dimensional tolerances, and testing requirements, ensuring fit-for-purpose performance in global projects.
ERW Pipes are essential for thousands of engineering and infrastructure systems:
🔹 Water & Sewage Pipelines: Municipal, industrial, and civil networks.
🔹 Fire-Fighting Systems: Fire hydrant pipelines, sprinkler risers.
🔹 Structural & Architectural Fabrication: Supports, frames, trusses, guard rails, furniture frames.
🔹 General Engineering & Fabrication: Automobile components, tubular structures, machine frames.
🔹 Mechanical & Utility Systems: Air, steam (low pressure), HVAC supports, ducts.
🔹 Industrial Piping: Process water, cooling lines, boiler feed lines.
🔹 Oil, Gas & Non-Critical Fluids: Suitable for low-pressure transport & casing.
Each application benefits from the consistent weld strength, dimensional stability, and cost efficiency of ERW Pipes.
Just as engineers evaluate stainless steel seamless pipes based on grade, temperature, corrosion level, and pressure requirement, ERW Pipes must be selected based on the correct material category — Carbon Steel, Mild Steel, or Stainless Steel.
Below is the complete engineering guide for selecting the correct ERW Pipe for your project.
| Parameter / Property | ERW Carbon Steel (ASTM A53 / IS 3589) | ERW Mild Steel (IS 1239 / IS 3589) | ERW Stainless Steel (304 / 304L / 316 / 316L) |
|---|---|---|---|
| Standard / Specification | ASTM A53 / A500 / API 5L / IS 3589 | IS 1239 / IS 3589 | ASTM A312 (ERW) / ASTM A358 |
| Material Type | Carbon Steel | Low Carbon Steel | Austenitic Stainless Steel |
| UNS Designation | K03005 (A53) | NA | S30400 / S30403 / S31600 / S31603 |
| Equivalent EN / DIN / JIS | EN 10217-1 / DIN 2440 | EN 10255 | SS 304 → 1.4301 / SS 316 → 1.4401 |
| Chemical Composition (% Max) | C: 0.18–0.25, Mn: 0.30–1.20, Si ≤ 0.35, P ≤ 0.050, S ≤ 0.058, Fe Balance | C ≤ 0.20, Mn ≤ 1.3, P ≤ 0.040, S ≤ 0.040, Fe Balance | (304) C ≤ 0.08, Cr 18–20, Ni 8–11; (316) C ≤ 0.08, Cr 16–18, Ni 10–14, Mo 2–3 |
| Tensile Strength (MPa) | 330 – 415 | 320 – 380 | ≥ 515 |
| Yield Strength (MPa) | ≥ 205 | ≥ 195 | ≥ 205 |
| Elongation (%) | ≥ 20 | ≥ 20 | ≥ 40 |
| Hardness (HRB) | ≤ 90 | ≤ 92 | ≤ 90 |
| Corrosion Resistance | Moderate | Low | Excellent |
| Temperature Range (°C) | Ambient to 400°C | Ambient to 350°C | -196°C to +870°C (316L), -196°C to +800°C (304) |
| Typical Applications | Water lines, structural, fabrication, light engineering | Scaffolding, low-pressure water systems, furniture, fabrication | Chemical, food-grade utility, decorative, architectural, water systems |
| Available Sizes (NB / OD) | ½″ – 24″ NB / 17.2 – 610 mm OD | ½″ – 24″ NB | ½″ – 12″ NB |
| Schedules (Thickness) | SCH 10 / 20 / 40 / 80 | SCH 10 / 20 / 40 | SCH 5 – SCH 40 |
| End Finishes | Plain, Bevelled, Threaded | Plain, Threaded | Plain, Bevelled |
| Testing Requirements | Hydro, Eddy Current, Bend, Flattening, Weld Inspection | Hydro, Bend Test, Visual & Dimensional | Hydro, Eddy Current, PMI, Weld Bead Inspection |
| Typical HS / HSN Code | 7306.30 | 7306.30 / 7306.90 | 7306.40 |
| Equivalent ASTM / ASME | ASTM A53 / A500 / API 5L | IS 1239 / IS 3589 | ASTM A312 / A358 |
| Supply Condition | Black / Galvanized | Black / GI | Annealed / Pickled / Polished |
| Certifications & Docs | MTC 3.1 / 3.2, Hydro Test Report, NDT Report | MTC 3.1, Hydro Test | MTC 3.1 / 3.2, PMI, CE / PED, TPI |
Material Category (CS / MS / SS)
ERW Carbon Steel (ASTM A53, API 5L, IS 3589)
ERW Mild Steel (IS 1239 Medium / Heavy)
ERW Stainless Steel (304/304L/316/316L)
Pressure & Temperature Ratings
ERW Pipes are ideal up to:
For higher pressure or superheated steam → use seamless or SAW.
Welding & Fabrication Compatibility
Certifications & Compliance
Inox Steel India supplies ERW Pipes with:
India:
High consumption in Mumbai, Pune, NCR, Gujarat, Chennai for water lines, construction & fabrication.
GCC & Middle East:
UAE, Saudi Arabia, Oman import ERW pipes for infrastructure, mechanical works, and fabrication.
Africa:
Nigeria, Egypt, Kenya, South Africa source ERW CS/MS for water & structure.
Europe & Americas:
UK, Germany, USA, Brazil purchase ERW SS for food, architecture & light process applications.
Inox Steel India supports all these regions with ready stock + export packaging + fast dispatch from JNPT/Mundra/Hazira.
Below follows the same style as the stainless steel page — each grade/type has its own section.
ERW Carbon Steel Pipes (A53 / A500 / IS 3589 / API 5L)
Service Use:
Water, fire-fighting, process water, structural applications.
Typical Applications:
Size Range: ½″ – 24″ NB
Temperature Range: Ambient to 400°C
Industry Sectors: Construction | EPC Contractors | Water Boards | Fabricators | Agriculture
ERW Mild Steel Pipes (IS 1239 / IS 3589 Medium/Heavy)
Service Use:
Low-pressure structural & fabrication work.
Typical Applications:
Size Range: ½″ – 24″ NB
Temperature Range: Ambient to 350°C
Industry Sectors: Infrastructure | Fabrication | Furniture | Light Engineering
ERW Stainless Steel Pipes (304 / 304L / 316 / 316L)
Service Use:
Corrosion resistant utility lines, decorative structures, food-grade & chemical lines.
Typical Applications:
Size Range: ½″ – 12″ NB
Temperature Range: -196°C to +870°C
Industry Sectors: Pharma | Chemical | Food & Beverage | Architecture | Marine
| NPS (Inch) | OD (mm) | Wall Thickness (mm) | Approx. Weight (kg/m) |
|---|---|---|---|
| ½″ | 21.3 | 2.0 – 3.2 | 1.00 – 1.40 |
| 1″ | 33.4 | 2.6 – 3.6 | 1.80 – 2.45 |
| 2″ | 60.3 | 3.2 – 4.0 | 4.80 – 5.60 |
| 3″ | 88.9 | 3.2 – 5.0 | 7.20 – 10.20 |
| 4″ | 114.3 | 3.6 – 6.0 | 10.5 – 16.8 |
| 6″ | 168.3 | 4.5 – 7.1 | 20.8 – 30.2 |
| 8″ | 219.1 | 5.0 – 8.2 | 28.4 – 43.6 |
| 10″ | 273.1 | 6.0 – 9.3 | 40.2 – 63.1 |
| 12″ | 323.9 | 6.4 – 9.5 | 55.7 – 84.3 |
Prices vary by grade, heat treatment, thickness, and project requirements.
| Material / Grade | OD Range (mm) | INR/kg (F.O.B Mumbai) | USD/kg (F.O.B India) | Typical Use |
|---|---|---|---|---|
| ERW CS (A53 / IS 3589) | 17 – 610 | ₹ 60 – ₹ 85 | $ 0.75 – $ 1.05 | Water / Structural |
| ERW MS (IS 1239 Medium/Heavy) | 17 – 610 | ₹ 55 – ₹ 75 | $ 0.70 – $ 0.95 | Fabrication / Scaffolding |
| ERW SS 304 / 304L | 12 – 325 | ₹ 240 – ₹ 320 | $ 3.0 – $ 3.9 | Food / Decorative |
| ERW SS 316 / 316L | 12 – 325 | ₹ 320 – ₹ 450 | $ 3.9 – $ 5.4 | Chemical / Marine |
Just like stainless steel seamless pipes, every ERW Pipe undergoes:
All materials are supplied with full documentation:
Just as engineers select stainless steel seamless pipes based on consistent metallurgy and global certifications, ERW Pipes must be sourced from a mill that ensures weld integrity, uniform thickness, surface finish quality, and full test documentation.
Inox Steel India brings all these capabilities together:
Top Reasons to Choose Inox Steel India
| Industry | Application | Material Used |
|---|---|---|
| Water Supply Boards | Transmission mains, distribution lines | ERW CS / MS |
| Fire-Fighting Systems | Hydrant lines, risers | ERW CS |
| Construction & Infrastructure | Structural supports, columns | ERW CS / MS |
| Fabrication Workshops | Frames, mechanical structures | ERW MS / CS |
| Furniture Manufacturing | Tubular furniture | ERW MS |
| HVAC & Mechanical | Supports, duct stands | ERW CS / MS |
| Pharma & Food | Utility & decorative lines | ERW SS 304 / 316 |
| Chemical Industries | Low-pressure fluid lines | ERW SS 316 |
| Automotive | Chassis, tubular components | ERW CS / MS |
Our packaging system follows the same export-grade standards as our seamless and welded stainless steel products:
🌍 Export Ports
🌎 Export Regions
This follows the exact export detailing style found in your stainless steel pipe page.
Inox Steel India supplies ERW Pipes with mill test certification, full traceability, and export packaging.
Whether you need carbon steel, mild steel, or stainless steel ERW Pipes — our team supports you with quick delivery, competitive prices, and technical guidance.
52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004
alloy@inoxsteelindia.in, steel@inoxsteelindia.in
+91 9930796690
ASTM A53, A500, IS 3589, IS 1239, API 5L, and ASTM A312 (ERW SS).
ERW Pipes have a weld seam and are ideal for low/medium pressure. Seamless pipes have no weld and are used for high-pressure/high-temperature applications.
Yes, ERW CS/MS pipes are widely used in structures, frames, columns, trusses, and fabrication work.
Absolutely — IS 3589 and A53 ERW pipes are standard for water lines.
Yes — grades 304, 304L, 316, and 316L are available.
If you need ERW Pipes with guaranteed weld integrity, consistent dimensions, and export-ready documentation, Inox Steel India is your trusted manufacturer.
📞 Contact us today for the best price & fastest delivery.