Home > Welded Pipes > Carbon Steel Welded Pipes
Inox Steel India is a leading manufacturer and global exporter of Carbon Steel Welded Pipes in accordance with ASTM A53, API 5L (PSL1/PSL2), and IS 3589 standards.
We supply ERW, EFW, and SAW welded carbon steel pipes for oil & gas transmission, water distribution networks, structural fabrication, fire-fighting systems, engineering projects, fabrication industries, and general-purpose fluid services.
Our carbon steel welded pipes are manufactured using premium-grade hot-rolled coils or plates, welded using ERW, EFW, or SAW processes, and tested through ultrasonic testing, hydrostatic testing, dimensional inspection, and third-party certifications (SGS, BV, DNV, TÜV, Lloyd’s) to ensure high performance and durability.
With export capability to the Middle East, Africa, Europe, the USA, and Asia, Inox Steel India is recognized for delivering pipes with excellent weld consistency, corrosion protection (3LPE/FBE/CTE), superior dimensional accuracy, and on-time project execution.
Carbon Steel Welded Pipes are manufactured by forming and welding carbon steel coils or plates using electric resistance welding (ERW), submerged arc welding (SAW/LSAW/HSAW), or electric fusion welding (EFW).
These pipes are known for:
Standards like ASTM A53 are used for low/medium pressure fluids and structural work, API 5L is used for oil & gas pipelines, while IS 3589 is the preferred choice for water pipelines and engineering services.
Types of Carbon Steel Welded Pipes We Manufacture
1️⃣ Raw Material Selection
High-quality carbon steel coils or plates inspected for chemical composition and mechanical properties.
2️⃣ Forming & Edge Preparation
Steel is formed into cylindrical shape using rollers, and edges are prepared for clean welding.
3️⃣ Welding Operation (ERW / EFW / SAW)
4️⃣ Weld Bead Removal & Finishing
Internal and external weld beads are trimmed to ensure smooth flow.
5️⃣ Heat Treatment (If Required)
Stress relief or normalizing based on standard or client specifications.
6️⃣ Non-Destructive Testing (NDT)
UT, Eddy Current, DP, RT (for SAW/EFW) performed on weld area.
7️⃣ Hydrostatic Pressure Test
Ensures pipe integrity under internal pressure.
8️⃣ Coating / Surface Protection
3LPE, FBE, bitumen, black varnish, epoxy lining (as required).
9️⃣ Final Dimensional Check & Marking
Each pipe is marked with grade, heat number, OD, thickness, and manufacturing details.
Oil & Gas Transmission Pipelines
API 5L PSL1/PSL2 pipes for petroleum products, gas, crude oil, and city gas networks.
Water Supply & Distribution Lines
IS 3589 pipes for municipal, industrial, irrigation, and drinking water networks.
Structural & Engineering Pipes
Used for fabrication, building structures, mechanical supports, towers, base frames.
Fire-Fighting & HVAC Lines
Low-pressure fluid transportation and fire suppression systems.
General Purpose Low/Medium Pressure Systems
ASTM A53 pipes used in water, air, gas, and fabrication industries.
Casing, Columns & Mechanical Applications
Medium-strength structural requirements.
Carbon Steel Welded Pipes are widely used in industries where high strength, weld reliability, and economical pipeline systems are required. These pipes are produced by electrically welding carbon steel strips or plates using ERW, EFW, or SAW methods depending on the size, pressure class, and project requirements.
Standards like ASTM A53 are suitable for low/medium pressure and structural usage, API 5L PSL1/PSL2 is used for critical oil & gas pipeline transmission systems, while IS 3589 is preferred for water pipelines, sewage lines, fire-fighting networks, and engineering services.
Inox Steel India manufactures welded carbon steel pipes with strict dimensional tolerance, uniform weld penetration, coating compatibility (3LPE/FBE/Epoxy), and full QA/QC documentation to ensure long-term and safe pipeline performance.
| Parameter / Property | ASTM A53 Welded Pipes | API 5L Welded Pipes (PSL1 / PSL2) | IS 3589 Welded Pipes (Water & Structural) |
|---|---|---|---|
| Category | ERW / EFW Carbon Steel Pipes | ERW / SAW Line Pipes | ERW / SAW Water Pipes |
| Application Type | Low/medium pressure, general purpose | Oil & Gas transmission | Water pipelines, structural |
| Standards | ASTM A53 Gr A / Gr B | API 5L PSL1 & PSL2 (Gr B, X42–X70) | IS 3589 Grade FE330 / FE410 |
| Manufacturing Process | ERW / EFW | ERW / LSAW / HSAW | ERW / SAW |
| UNS Equivalent | K03005 / K03006 | NA (API system) | NA (Indian standard) |
| Chemical Composition | C: 0.25–0.30%, Mn: 0.95–1.2% | Depends on API grade | C: 0.20–0.30%, Mn: 0.70–1.2% |
| Mechanical Properties | TS: 330–415 MPa, YS: 205–240 MPa | TS: 415–760 MPa | TS: 330–450 MPa |
| Weld Type | ERW / EFW | ERW / SAW | ERW / SAW |
| Corrosion Resistance | Moderate (Requires coating) | Moderate (Requires coating) | Moderate (Coating recommended) |
| Coating Options | Black, Varnished | 3LPE / FBE / CTE, internal epoxy | 3LPE / bitumen / epoxy |
| OD Range | ½” – 24” | 2” – 48” (SAW up to 120”) | ½” – 36” |
| Wall Thickness | SCH 10 – SCH 80 | Customized (API std) | 4 mm – 20 mm |
| Available Lengths | 6 m / 12 m | 6 m / 12 m / custom | 6 m / 12 m |
| End Finish | Bevelled / Plain | Bevelled / Plain | Bevelled / Plain |
| NDT Testing | Eddy Current / UT | UT, Hydro, CVN, Bend | Hydro, UT |
| Pressure Rating | Low to medium | Medium to high | Low pressure (water lines) |
| WPS / PQR | Available | Available | Available |
| Heat Treatment | Not required (may be stress-relieved) | As per API requirement | Not required |
| Documentation | MTC EN 10204 – 3.1 | API Monogram (if required), 3.1/3.2 | MTC 3.1 |
| Typical Uses | Structural, water, air lines, fabrication | Oil & Gas, pipeline transmission | Water distribution, agriculture |
| HSN Code | 7306.30 / 7306.19 | 7305.31 / 7305.39 | 7306.30 |
ASTM A53 – Carbon Steel ERW/EFW Pipes
Used for:
API 5L – Line Pipes (ERW/SAW)
Used for:
IS 3589 – Water & Structural Pipes
Used for:
✔ For low/medium pressure water, air, steam lines
Use ASTM A53
Cost-effective & widely used in utilities.
✔ For oil & gas transmission (medium/high pressure)
Use API 5L PSL1/PSL2
Higher mechanical strength, strict QC, superior weld reliability.
✔ For water supply, irrigation & structural pipelines
Use IS 3589 FE330 / FE410
Optimized for large diameter water distribution.
✔ For large-diameter pipelines (transport networks)
Use SAW/LSAW/HSAW according to project specifications.
✔ For corrosive soil or buried pipelines
Use 3LPE / FBE / CTE coating for long-term protection.
| Application | Preferred Standard | Reason |
|---|---|---|
| Crude oil & gas transmission | API 5L PSL2 | High strength + stringent QC |
| Natural gas & petroleum pipelines | API 5L | Toughness & weld integrity |
| Water distribution pipelines | IS 3589 | Large diameter + cost-effective |
| Fire-fighting systems | ASTM A53 | Medium pressure compatibility |
| HVAC & utility lines | ASTM A53 | Good weldability |
| Sewage & drainage systems | IS 3589 | Thick-wall capability |
| Structural fabrication | ASTM A53 / IS 3589 | Strength + dimensional accuracy |
| Piling & columns | SAW welded | Heavy thickness possible |
| Parameter | Capability |
|---|---|
| Outside Diameter (ERW) | ½” – 24” |
| Outside Diameter (SAW / LSAW / HSAW) | 16” – 120” |
| Wall Thickness | SCH 10 – SCH 80 / 4 mm – 20 mm |
| Length | 6 m / 12 m (custom available) |
| Ends | Bevelled / Plain |
| Coating Options | Black, Varnished, FBE, 3LPE, CTE, Epoxy |
| Grade / Type | Price (INR/MT) | Price (USD/MT) |
|---|---|---|
| ASTM A53 ERW | ₹ 62,000 – ₹ 75,000 | $ 750 – $ 910 |
| API 5L PSL1 | ₹ 65,000 – ₹ 95,000 | $ 780 – $ 1180 |
| API 5L PSL2 | ₹ 72,000 – ₹ 120,000 | $ 900 – $ 1500 |
| IS 3589 FE330/FE410 | ₹ 60,000 – ₹ 85,000 | $ 720 – $ 1050 |
| SAW/LSAW Line Pipes | ₹ 80,000 – ₹ 140,000 | $ 980 – $ 1700 |
(Prices vary depending on thickness, coating, PSL level, OD & TPI requirements.)
Inox Steel India ensures strict QA/QC as per ASTM / API / IS:
✔ Non-Destructive Testing
✔ Mechanical Testing
✔ Hydrostatic Testing
Mandatory for all carbon steel welded pipes.
✔ Coating Inspection
✔ Documentation
✔ Third-Party Inspection
SGS / DNV / BV / Lloyd’s / TÜV available.
7306.40 — Stainless Steel Welded Pipes & Tubes
We export Carbon Steel Welded Pipes to:
Middle East:
Africa:
Europe:
Americas:
Asia Pacific:
Used across oil & gas, water transmission, municipal projects, structural fabrication, and large pipeline networks.
Carbon Steel Welded Pipes must have uniform weld strength, dimensional accuracy, coating compatibility, and consistent mechanical performance, especially for oil & gas pipelines, water distribution networks, and structural applications.
Inox Steel India delivers CS welded pipes tested and manufactured to global standards, ensuring safe and dependable service for long-term projects.
Our pipes are trusted worldwide because:
Whether for structural fabrication, process lines, oil transmission, or municipal pipelines, Inox Steel India provides reliable carbon steel welded pipe solutions globally.
Oil & Gas Transmission
API 5L PSL1/PSL2 pipes for petroleum, crude oil, gas, refinery pipelines, and long-distance transportation.
Water Transmission & Distribution
IS 3589 pipes for large-diameter water mains, irrigation networks, and municipal supply systems.
Structural & Mechanical Fabrication
ASTM A53 pipes for building structures, supports, racks, towers, and mechanical components.
Fire-Fighting & HVAC
A53 Grade B pipes for medium pressure systems, chilled water lines, fire suppression networks.
Sewage & Drainage Systems
IS 3589 thick-wall pipes used for underground sewage, effluent discharge & stormwater lines.
General Engineering Applications
Fabrication, process piping, industrial utilities, and low-pressure liquid/gas transport.
To ensure safe delivery, all carbon steel welded pipes are packed as per international export standards.
✔ Export Packaging Includes:
✔ Ports of Dispatch:
JNPT (Nhava Sheva), Mundra, Hazira, Chennai
✔ Export Regions:
Middle East, Africa, Europe, USA, South America, Southeast Asia
Looking for ASTM A53, API 5L, or IS 3589 Carbon Steel Welded Pipes for oil & gas, water supply, fabrication, or industrial applications?
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
API 5L is used for oil & gas pipelines (higher mechanical strength), while A53 is for low/medium pressure and structural usage.
Yes — 3LPE, FBE, CTE, bitumen, epoxy lining & black varnish.
½”–24” ERW + 16”–120” SAW/LSAW/HSAW.
Yes — to 45+ countries including GCC, Africa, Europe, USA & Latin America.
Yes — MTC 3.1/3.2 and TPI from SGS, BV, DNV, TÜV, Lloyd’s.
We provide complete technical support, MTC, certifications, and global export delivery.