Home > Seamless Pipe > IS 3589 / IS 3601
Grades: Class A & Class B
Inox Steel India is a leading manufacturer and supplier of IS 3589 and IS 3601 Carbon Steel Pipes, widely used for water supply pipelines, structural applications, fabrication, industrial utility piping, piling, and general engineering purposes.
IS 3589 and IS 3601 are among India’s most widely used standards for ERW, LSAW, and HSAW carbon steel pipes, offering strength, durability, weldability, and cost-efficiency. These pipes are essential in water transmission projects, PWD contracts, municipal pipelines, industrial fabrication, and structural steelwork.
IS 3589 covers large-diameter water & gas pipelines, while IS 3601 covers general engineering purposes such as air, water, light pressure lines, scaffolding, and fabrication.
Our pipes are manufactured using high-grade HR coils, followed by ERW welding, online NDT, hydro testing, and surface coating, ensuring full compliance with IS standards.
Class A is suitable for medium-duty applications, while Class B is the preferred choice for heavy-duty, high-strength, and structural applications.
IS 3589 — Steel Pipes for Water, Gas & Sewage
Covers ERW / LSAW large-diameter carbon steel pipes used for:
Available in:
IS 3601 — Steel Pipes for General Engineering
Covers small & medium OD pipes used in:
Our IS pipes are suitable for welding, bending, threading, and general fabrication.
| Feature | Class A | Class B |
|---|---|---|
| Strength | Medium | High |
| Wall Thickness | Lower | Higher |
| Pressure Handling | Medium | High |
| Use Case | Water lines, general piping | Structural, piling, heavy-duty water lines |
| Cost | Lower | Slightly higher |
| Parameter / Property | IS 3589 Class A | IS 3589 Class B | IS 3601 |
|---|---|---|---|
| Standard | IS 3589 (Steel pipes for water/gas)** | IS 3589 | IS 3601 |
| Material Type | Carbon Steel | Carbon Steel | Carbon Steel |
| Common Use | Water & Gas Pipelines | High-pressure water & structural use | General engineering, air, water pipelines |
| Yield Strength (MPa) | 240 | 280 | 240–260 |
| Tensile Strength (MPa) | 360 | 410 | 360–410 |
| Elongation (%) | 20 | 20 | 18–22 |
| Max Carbon (C) | 0.20% | 0.25% | 0.20–0.25% |
| Manganese (Mn) | 0.30–0.90% | 0.30–1.30% | 0.30–1.30% |
| Phosphorus (P) | ≤ 0.04% | ≤ 0.04% | ≤ 0.04% |
| Sulphur (S) | ≤ 0.04% | ≤ 0.04% | ≤ 0.04% |
| Pressure Rating | Medium | Higher | Medium |
| Suitable Coatings | Black, Varnish, Galvanized | Black, 3LPE, FBE | Black, GI |
| Available Types | ERW / LSAW / HSAW | ERW / LSAW / HSAW | ERW / Seamless |
| OD Range | 168 mm – 1016 mm | 219 mm – 2600 mm | 15 mm – 500 mm |
| Wall Thickness (WT) | 4.0 mm – 12 mm | 5.0 mm – 25 mm | 2.0 mm – 12 mm |
| End Conditions | Plain / Bevelled | Plain / Bevelled | Plain |
| Weld Type | ERW / HSAW / LSAW | ERW / HSAW / LSAW | ERW / Seamless |
| Coating Option | Bitumen / Epoxy / 3LPE | Bitumen / Epoxy / 3LPE | GI / Black |
| HSN Code | 73051190 / 73059090 | Same | 730630 |
| Certifications | ISI Marking | ISI Marking | ISI Marking |
India:
Used extensively in:
Middle East:
Used for:
Europe & Asia:
Large demand for:
Africa:
Used for:
Inox Steel India exports IS pipes globally with complete certification and project-specific inspection.
IS 3589 / IS 3601 pipes supplied by Inox Steel India are widely used in water pipelines, gas transmission, fabrication, structural steelworks, piling, construction, and general-purpose engineering applications.
These pipes are available in ERW, LSAW, HSAW formats with black, varnished, galvanized, bitumen, epoxy, and 3LPE coatings.
Applications by Grade / Type / Pressure / Industry
IS 3589 – Class A (Medium Duty Carbon Steel Pipe)
Service Use:
For medium-pressure water, gas, and general industrial lines.
Typical Applications:
Size Availability:
OD: 168–1016 mm | WT: 4–12 mm | Length: 5.5m / 6m / 12m
Industries:
Construction | Utility | Fabrication | Water Supply
IS 3589 – Class B (Heavy Duty Carbon Steel Pipe)
Service Use:
High-strength & heavy-duty structural and pipeline applications.
Typical Applications:
Size Availability:
OD: 219–2600 mm | WT: 5–25 mm | Length: 6m / 12m
Industries:
Infrastructure | EPC | Civil | Industrial | Marine
IS 3601 – General Engineering CS Pipes (Class A/B equivalent)
Service Use:
General-purpose engineering, low-pressure pipelines & fabrication.
Typical Applications:
Size Availability:
OD: 15–500 mm | WT: 2–12 mm | Length: 6m
Industries:
Engineering | Automotive | Manufacturing | Construction
| OD (mm) | WT (mm) | Approx. Weight (kg/m) |
|---|---|---|
| 168.3 | 4.0 | 16.50 |
| 219.1 | 4.8 | 22.45 |
| 273.0 | 6.0 | 38.00 |
| 323.9 | 6.4 | 48.50 |
| 355.6 | 8.0 | 69.90 |
| 406.4 | 8.8 | 82.90 |
| 508.0 | 10.0 | 125.00 |
| 610.0 | 12.0 | 180.00 |
| 762.0 | 12.5 | 235.00 |
| 914.0 | 14.2 | 320.00 |
| 1016.0 | 16.0 | 410.00 |
| 1422.0 | 20.0 | 725.00 |
| Grade / Type | INR/kg | USD/kg | Condition |
|---|---|---|---|
| IS 3589 Class A (ERW) | ₹ 72 – ₹ 90 | $1.00 – $1.25 | Black / Varnish |
| IS 3589 Class B (ERW) | ₹ 78 – ₹ 105 | $1.10 – $1.45 | Black / Coated |
| IS 3589 Class B (LSAW/HSAW) | ₹ 85 – ₹ 120 | $1.20 – $1.60 | Black / 3LPE |
| IS 3601 ERW Pipes | ₹ 65 – ₹ 85 | $0.90 – $1.20 | Black / GI |
| IS 3601 Precision Tubes | ₹ 90 – ₹ 130 | $1.25 – $1.75 | Cold Drawn |
✔ 73051190 — ERW Carbon Steel Pipes
✔ 73059090 — LSAW / HSAW Pipes
✔ 730630 — Light Engineering Tubes (IS 3601)
IS 3589 / IS 3601 pipes undergo comprehensive testing to ensure structural stability, weld quality, and pressure integrity.
Mandatory Mechanical Tests
Non-Destructive Tests
Pressure Testing
Coating & Surface Tests
Documentation Supplied
Inox Steel India is a trusted manufacturer and exporter of IS 3589 (Class A / Class B) and IS 3601 carbon steel pipes used by water supply departments, infrastructure contractors, PWD projects, EPC companies, municipal corporations, fabrication units, and structural steelwork manufacturers.
We supply ERW, LSAW, and HSAW pipes from 168 mm OD to 2600 mm OD, along with small/medium OD engineering pipes under IS 3601.
Our pipes comply with ISI-certified manufacturing, undergo strict NDT, hydro testing, weld seam inspection, coating DFT testing, and are supplied with complete traceability.
Top Reasons to Choose Inox Steel India
| Industry | Applications | Preferred Grade |
|---|---|---|
| Water Supply Projects | Water transmission pipes | Class A / B |
| PWD / Government Projects | Jal Jeevan Mission, drinking water pipelines | Class B |
| Civil & Structural Engineering | Piling, columns, supports | Class B |
| Oil & Gas (Non-pressure) | Utility pipelines | Class B |
| Firefighting Systems | Hydrant & sprinkler lines | Class A |
| Fabrication Units | Structures, ducting, frames | Class A / IS 3601 |
| Mechanical & Engineering | Frame, machinery parts | IS 3601 |
| Automotive | Structural tubes, fabrication | IS 3601 |
IS 3589 / 3601 pipes are exported with heavy-duty packaging for long-distance transport.
Export Packaging Includes:
🌍 Major Export Countries:
UAE • Oman • Qatar • Saudi Arabia • Bahrain
Kenya • South Africa • Nigeria • Ghana
Malaysia • Indonesia • Singapore
Poland • Italy • Spain • Romania
If you are searching for IS 3589 / IS 3601 Class A/B carbon steel pipes near Alankar Cinema, Mumbai, Inox Steel India is your most reliable supplier for:
We offer:
✓ Ready stock in Class A & Class B
✓ ERW, LSAW, HSAW pipes
✓ Custom lengths (6m / 12m / Cut-to-size)
✓ Coating: Black, GI, Varnish, Epoxy, 3LPE
✓ ISI mark with full certifications
Same-day dispatch available in Mumbai, Navi Mumbai & Thane.
Get technical support, MTC samples, TPI inspection, and quotations within 24 hours.
📥 Downloadable Resources:
Datasheet • Price Sheet • Coating Specs • ISI Certificates • Test Reports (PDF)
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
Class B has higher wall thickness and higher strength → ideal for piling & structural works.
Yes — Class B is widely used for piling, bridge columns, and marine works.
Yes — 3LPE, FBE, Bitumen, Coal Tar, Epoxy, Primer.
UT, ECT, hydro test, tensile test, coating DFT test, weld seam inspection.
Yes — we regularly supply Class A/B pipes for government water projects.
HSN 73051190, 73059090, 730630 (IS 3601).
Yes — SGS, TUV, BV, DNV, Lloyds on request.
Inox Steel India is one of India’s leading suppliers of IS 3589 / IS 3601 ERW, LSAW & HSAW carbon steel pipes, offering strong, durable, ISI-certified material for water pipelines, piling, structural fabrication, and engineering application