Home > Welded Pipes > IS 3589 / IS 1239
Inox Steel India is a leading manufacturer and global exporter of IS 3589 and IS 1239 ERW MS Pipes, supplying industries across water transmission, structural fabrication, engineering, construction, agriculture, automotive, and general fluid handling. Our ERW Mild Steel pipes are produced using high-frequency electric resistance welding technology to ensure strong weld seams, corrosion protection, dimensional accuracy, and pressure reliability.
We supply IS 3589 heavy-duty pipes for water supply systems, structural projects, process industries, and heavy engineering, while IS 1239 pipes cater to low-to-medium pressure applications, air lines, fire-fighting systems, light fabrication, and general engineering use.
Our products are widely exported to UAE, Saudi Arabia, Africa, Europe, South America, and Southeast Asia, supporting government water projects, industrial expansions, and infrastructure development.
✔ IS 3589 – MS Welded Pipes for Water & Structural UseIS 3589 covers large and medium diameter mild steel welded pipes used in:
Available in grades:
✔ IS 1239 – MS ERW Pipes for Medium/Low PressureIS 1239 is used for smaller diameter light-to-medium class ERW pipes, ideal for:
Available in classes:
✔ IS 3589 ERW Pipes
✔ IS 1239 ERW Pipes
To match your seamless pipe sample style, here’s a clear, step-by-step flow:
Raw Material Selection
High-quality mild steel strips or plates are tested for chemistry, hardness, and surface quality.
Slitting & Edge Preparation
Coils are slit into required width and edges are prepared for effective HF/ERW welding.
Forming
The strip is passed through forming rolls to create a circular shape.
ERW / HFW Welding
Electric currents heat the edges → pressure applied → strong forge weld created.
Weld Bead Removal (Internal/External)
Beads are trimmed for a smooth finish for fluid flow and structural uniformity.
Sizing & Shaping
Pipes are calibrated for:
Hydrostatic & NDT Testing
All pipes undergo:
Surface Protection
Pipes are delivered in:
Final Inspection & Marking
Each pipe is marked with:
Grade • Class • Heat No. • Size • Standard (IS 3589 / IS 1239)
✔ Water & Sewage Projects
✔ Fire Fighting & Air Lines
✔ Structural & Construction
✔ Industrial & Utility Piping
✔ Automotive, Furniture & Engineering
IS 3589 pipes handle heavy-duty engineering applications, while IS 1239 suits light-to-medium pressure and fabrication use.
| Parameter / Property | IS 3589 ERW MS Pipes | IS 1239 ERW MS Pipes |
|---|---|---|
| Standard | IS 3589 (Part 1 & 2) | IS 1239 (Part 1) |
| Application Type | Water, sewage, structural, heavy engineering | Light-medium pressure, water, air lines |
| Grades Available | FE 330, FE 410 | Class A, B, C |
| Material Type | Mild Steel / Carbon Steel | Mild Steel |
| Manufacturing Process | ERW (Electric Resistance Welded) | ERW (Electric Resistance Welded) |
| Diameter Range (OD) | 15 mm – 1500 mm | 6 mm – 150 mm |
| Wall Thickness | 2.5 mm – 12.5 mm | 1.8 mm – 6.0 mm |
| Pipe Class / Category | Heavy, Medium Usage | Class A (Light), Class B (Medium), Class C (Heavy) |
| End Conditions | Plain Ends / Bevelled Ends | Plain Ends |
| Surface Finish | Black, Painted, Galvanized (GI), Varnished | Black, GI |
| Pressure Suitability | Medium-Heavy Pressure | Low-Medium Pressure |
| Tensile Strength | 320–410 MPa | 320 MPa |
| Yield Strength | FE 330: ≥ 205 MPaFE 410: ≥ 240 MPa | 195–235 MPa |
| Elongation | ≥ 20% | ≥ 18% |
| Hydrostatic Test | Mandatory | Mandatory |
| NDT | Eddy Current / Visual / Flattening | Eddy Current (select sizes) |
| Coating Options | Black, GI, Epoxy, Varnish | Black, GI |
| Applications | Water, sewage, structural, casing, fabrication | Water, air, furniture, general engineering |
| Documentation | MTC, Hydro Report | MTC |
| HSN Code | 7306 | 7306 |
This datasheet summarizes the chemical, mechanical, dimensional and testing requirements of IS 3589 & IS 1239 Mild Steel ERW Pipes, supporting accurate technical selection for water, structural, and engineering applications.
Outside Diameter (OD)
Wall Thickness (WT)
Length
End Finishes
Surface Options
| Element | IS 3589 | IS 1239 |
|---|---|---|
| Carbon (C) | 0.20 – 0.25% | 0.20% max |
| Manganese (Mn) | 0.35 – 1.30% | 0.30 – 0.60% |
| Sulphur (S) | 0.040% max | 0.040% max |
| Phosphorus (P) | 0.040% max | 0.040% max |
| Silicon (Si) | 0.10 max | 0.10 max |
| Property | IS 3589 (FE 330 / FE 410) | IS 1239 (Class A / B / C) |
|---|---|---|
| Tensile Strength | 330–410 MPa | 320 MPa |
| Yield Strength | 205–240 MPa | 195–235 MPa |
| Elongation | 20% min | 18% min |
| Hardness | ≤ 90 HRB | ≤ 90 HRB |
ERW / HFW Pipe Capability at Inox Steel India
IS 1239 (Part 1)
IS 3589
(Matching your seamless pipe sample format)
| Pipe Type | Price (INR/kg) | Price (USD/kg) |
|---|---|---|
| IS 1239 Class A | ₹ 55 – ₹ 70 | $ 0.75 – $ 1.00 |
| IS 1239 Class B | ₹ 60 – ₹ 80 | $ 0.80 – $ 1.10 |
| IS 1239 Class C | ₹ 65 – ₹ 90 | $ 0.90 – $ 1.25 |
| IS 3589 FE 330 | ₹ 65 – ₹ 100 | $ 0.90 – $ 1.40 |
| IS 3589 FE 410 | ₹ 75 – ₹ 115 | $ 1.00 – $ 1.60 |
| GI (Galvanized) Coating | +₹ 8 – ₹ 20 | +$ 0.12 – $ 0.30 |
Prices vary depending on OD, WT, surface finish, class/grade & quantity.
✔ Mandatory Tests (Both Standards)
✔ Optional On Request
✔ Documentation
Countries We Export To
Middle East:
Africa:
Europe:
Americas:
Asia Pacific:
Industries Using IS 3589 / IS 1239 Pipes
Inox Steel India is a trusted and widely recognized manufacturer of ERW Mild Steel Pipes compliant with IS 3589 and IS 1239 standards. We supply to major water infrastructure companies, fabrication workshops, construction contractors, fire-fighting system integrators, and industrial OEMs across India and globally.
Why Customers Prefer Inox Steel India:
We guarantee strong weld joints, stable performance, and high durability in mild steel piping systems of all scales.
✔ Water Supply & Infrastructure
✔ Construction & Structural Fabrication
✔ Fire-Fighting Systems
✔ Air, Steam & Fluid Handling
✔ Furniture & General Engineering
IS 3589 is preferred for large diameter heavy-duty applications, while IS 1239 is ideal for light-to-medium pressure and fabrication work.
✔ Standard Packing
✔ Enhanced Protection for Export
✔ GI (Galvanized) Pipes Packing
✔ Ports Used
JNPT • Mundra • Chennai • Hazira • Vizag
Need IS 3589 / IS 1239 ERW MS Pipes for your project or fabrication?
52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004
alloy@inoxsteelindia.in
+91 9930796690
Inox Steel India
Email
Phone
Yes — we supply IS 1239 & IS 3589 in GI coated, hot-dip galvanized, or pre-galvanized form.
Yes — all pipes are 100% hydrostatic pressure tested.
Yes — IS 1239 Class C and IS 3589 FE 410 are widely used for fire hydrant piping.
Yes — 3m, 6m, 12m, or custom cut-lengths.
We supply high-quality ERW Mild Steel Pipes to domestic and international clients with the fastest delivery timelines.