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Inox Steel India is one of the leading manufacturers, suppliers, and exporters of spiral welded pipes (HSAW pipes) in India, delivering large-diameter transmission pipes to global industries across the GCC, Middle East, African nations, Europe, North America, and South America.
We specialize in spiral welded pipes for API line pipe applications, water transmission pipelines, sewage systems, irrigation, slurry transport, and piling foundations, manufactured in compliance with API 5L PSL1/PSL2, ASTM A139, IS 3589, EN 10219, and international project specifications.
With ISO-certified systems, stringent weld testing, and third-party inspection (SGS, BV, DNV, Lloyd’s, TÜV), every pipe is produced using advanced helical forming and SAW welding processes that deliver high dimensional accuracy, uniform weld penetration, and long-term service reliability.
Our spiral welded pipes are widely used in oil & gas distribution networks, municipal water supply, sewage systems, mining slurry pipelines, structural piling, and marine foundations — where large diameters, continuous weld integrity, corrosion protection, and long-distance performance are critical.
A spiral welded pipe (HSAW pipe) is a cylindrical pipe manufactured by helically welding a steel coil at a fixed forming angle, producing a continuous spiral seam along the pipe’s length.
This method allows the production of very large diameters (18″ to 120″) with excellent structural integrity, weld uniformity, and cost efficiency, making it ideal for long-distance water, oil, gas, and slurry pipelines.
The pipe is formed by feeding a steel coil through a set of forming rolls, shaping it into a helix, and applying double SAW welding (internal and external) for complete weld penetration and mechanical strength. The pipe is then expanded, calibrated, hydrotested, and coated (3LPE/FBE) to meet API and project requirements.
1️⃣ Coil Inspection & Preparation
High-strength HR coils are visually and ultrasonically inspected for lamination, thickness variation, and chemical consistency.
2️⃣ Edge Milling & Coil Conditioning
Coil edges are milled to achieve clean weld geometry and proper fusion.
3️⃣ Helical Forming (Spiral Forming Process)
The steel coil is fed at a controlled helix angle to produce the desired diameter and wall thickness.
4️⃣ SAW Internal Welding (ID SAW Weld)
A submerged arc welding head fuses the inner joint with continuous filler deposition.
5️⃣ SAW External Welding (OD SAW Weld)
The outer weld is reinforced using a second SAW pass, ensuring deep seam fusion.
6️⃣ Weld Bead Grinding & Surface Finishing
Internal and external weld beads are cleaned to achieve smooth bore and coating-ready surface.
7️⃣ Pipe Expansion & Sizing
Pipes are expanded to achieve the required roundness, OD tolerance, and dimensional accuracy.
8️⃣ Hydrostatic & Non-Destructive Testing
Hydrotest, ultrasonic testing (UT), weld seam NDT, CVN impact testing (for PSL2), bend and flattening tests are performed.
9️⃣ External & Internal Coating (Optional)
3LPE/3LPP, FBE, internal epoxy coating, or coal tar enamel (CTE) applied as per pipeline specifications.
🔟 Final Inspection, Marking & Dispatch
Pipes are visually inspected, measured, marked with Heat No/Grade/OD/WT/PSL level, and packed for domestic or export delivery.
Spiral welded pipes play a major role in large-diameter pipeline projects where long-distance transport, moderate pressure performance, corrosion protection, and structural reliability are essential.
These pipes combine helical forming, double submerged arc welding, and coil-based continuous production, resulting in excellent weld uniformity and cost efficiency for water, oil, gas, sewage, and slurry pipelines.
Inox Steel India supplies spiral welded pipes manufactured to API 5L PSL1/PSL2, ASTM A139, IS 3589, and EN 10219 standards, enabling designers, EPC contractors, and project engineers to select the correct pipe for transmission or structural applications.
| Parameter / Property | Spiral Welded Pipes (HSAW) – API Line Pipe | Spiral Welded Water Pipelines (IS / EN) | Spiral Welded Structural / Piling Pipes |
|---|---|---|---|
| Standard / Specification | API 5L PSL1 / PSL2, ASTM A139 | IS 3589, EN 10219 | ASTM A252, EN 10219 |
| Material Type | Carbon Steel (API Gr B, X42–X70) | Carbon Steel (FE330 / FE410) | Carbon Steel (Structural / Piling Grades) |
| Manufacturing Process | Helical cold forming + SAW welding (internal & external) | Helical cold forming + SAW welding | Same process with structural tolerances |
| UNS Designation | K03006 (Gr B), K03011 (X52), K03012 (X60/X65) | Not applicable | Not applicable |
| Equivalent EN / DIN | EN 10208-2 | EN 10219 / DIN 2450 | EN 10219, DIN |
| Chemical Composition (% Max) | C: 0.18–0.26, Mn: 1.0–1.2, Si: 0.18–0.35 | C ≤ 0.20, Mn ≤ 1.3 | Per structural grade requirement |
| Tensile Strength (MPa) | 415 – 660 | 350 – 550 | 350 – 600 |
| Yield Strength (MPa) | 240 – 460 | 220 – 350 | 220 – 350 |
| Elongation (%) | ≥ 18 | ≥ 20 | ≥ 20 |
| Hardness (HB) | ≤ 235 | ≤ 235 | ≤ 235 |
| Corrosion Resistance | Medium (Coating strongly recommended) | Medium | Medium |
| Temperature Range (°C) | -20°C to +400°C | Ambient to 200°C | Ambient to 250°C |
| Weld Type | Spiral Helical SAW Weld (DSAW optional) | Spiral Helical SAW Weld | Spiral Helical SAW Weld |
| Typical Applications | Oil, gas & hydrocarbon transmission pipelines | Potable water, sewage, irrigation pipelines | Piling, casing, foundations, marine structures |
| Available Sizes (Outside Diameter) | 18″ – 120″ | 18″ – 120″ | 16″ – 120″ |
| Wall Thickness Range | 6 mm – 32 mm | 5 mm – 25 mm | 6 mm – 30 mm |
| Schedules Available | STD, XS (on request) | STD | STD, XS |
| Length Supply Range | 6 m – 18 m (up to 24 m on request) | 6 m – 12 m | 6 m – 18 m |
| End Finishes | Bevelled, Plain, Weld Prep | Bevelled, Plain | Bevelled, Plain |
| Testing Requirements | UT (Full body & weld), Hydrotest, CVN for PSL2, Dimensional | Hydrotest, UT | UT, Hydrotest, Visual/Dimensional |
| Coating Options | 3LPE / 3LPP / FBE / Internal Epoxy | 3LPE / CTE / Internal Epoxy | As required |
| HSN Code | 7305.31 / 7305.39 | 7305.39 | 7305.39 |
| Equivalent ASTM / ASME | ASTM A139 | IS 3589 / EN 10219 | ASTM A252 |
| Supply Condition | As-Welded / Stress Relieved | As-Welded | As-Welded |
| Certifications & Documents Provided | MTC EN 10204 3.1 / 3.2, Hydro Test Report, UT Report, Welding Procedure Qualification, TPI Certificates | MTC, Hydro, UT, TPI | MTC, TPI upon request |
Spiral welded pipes from Inox Steel India are manufactured in multiple international grades and project-driven specifications:
API 5L Grades (PSL1 / PSL2)
IS 3589 Grades
EN 10219 Structural Grades
ASTM A252 Grades
Choosing the right grade depends on application:
| Application | Recommended Standard | Common Grades |
|---|---|---|
| Crude oil / gas transmission | API 5L PSL2 | X42, X52, X60 |
| Water transmission pipelines | IS 3589 | FE330, FE410 |
| Municipal wastewater lines | IS 3589 | FE330 |
| Irrigation channels | IS 3589 | FE410 |
| Slurry & mining transport | API / IS | X52 / FE410 |
| Structural piling | ASTM A252 / EN 10219 | Grade 3 / S355JR |
| Marine & bridge foundations | ASTM A252 | Grade 3 |
| Industrial utility lines | API 5L / IS | Gr B / FE330 |
| Outside Diameter (OD) | Range |
|---|---|
| Minimum OD | 18 inches (457 mm) |
| Maximum OD | 120 inches (3048 mm) |
| Wall Thickness | 6 mm – 32 mm (higher on request) |
| Length | 6 m – 18 m (up to 24 m on request) |
| End Finish | Bevelled / Plain Ends |
| Grade / Type | INR/MT | USD/MT |
|---|---|---|
| IS 3589 FE330 / FE410 | ₹ 65,000 – ₹ 95,000 | $ 780 – $ 1180 |
| API 5L Gr B / X42 | ₹ 72,000 – ₹ 110,000 | $ 900 – $ 1350 |
| API 5L X52 / X56 | ₹ 78,000 – ₹ 118,000 | $ 980 – $ 1420 |
| API 5L X60 / X65 | ₹ 85,000 – ₹ 130,000 | $ 1050 – $ 1600 |
| Structural / Piling (A252/EN) | ₹ 70,000 – ₹ 115,000 | $ 850 – $ 1400 |
7305.31 / 7305.39 — Helical (Spiral) Welded Pipes
Every spiral welded pipe undergoes the following mandatory tests:
✔ Hydrostatic Pressure Test
Ensures pipe strength against internal pressure.
✔ Ultrasonic Testing (UT) of Spiral Weld
Continuous weld seam inspection.
✔ Weld Seam NDT
Checks for cracks, voids, or inclusions.
✔ CVN (Impact) Testing for PSL2
Mandatory for API PSL2 grades.
✔ Bend & Flattening Test
Checks ductility and deformation capability.
✔ Visual & Dimensional Inspection
OD/WT tolerances, straightness & roundness.
✔ Coating Holiday Test (For 3LPE/FBE)
Ensures no coating gaps or discontinuities.
✔ Third-Party Inspection (Optional)
SGS / BV / DNV / Lloyd’s / TÜV.
GCC & Middle East:
Africa:
Europe:
Americas:
Our pipes are used in water supply networks, oil & gas pipelines, structural piling, and infrastructure expansion projects worldwide.
Pipeline, water infrastructure, and structural piling projects demand large-diameter, uniform-weld, corrosion-protected pipes that can perform reliably across long distances and challenging conditions.
Inox Steel India ensures consistent weld integrity, strict dimensional accuracy, and complete documentation as required by EPC contractors, government water projects, and international pipeline standards.
We supply spiral welded pipes with:
This combination of engineering strength, quality assurance, and value-driven pricing makes Inox Steel India a preferred choice for spiral welded pipeline requirements worldwide.
Oil & Gas Transmission (Low to Medium Pressure)
Used for crude oil, gas distribution, city gas grids, and hydrocarbon transport.
Water Transmission & Distribution
Large diameter water mains for municipal, industrial, and desalination projects.
Sewage & Drainage Systems
Gravity sewer lines, trunk mains, effluent pipelines, and wastewater treatment networks.
Irrigation & Agricultural Infrastructure
Long-run water channels, pressure irrigation systems, and river linking projects.
Slurry, Mineral & Fly-Ash Pipelines
Used in mining, power plants, and process industries.
Structural & Piling Works
Marine structures, bridge piles, offshore foundations, retaining walls, and drilling casing.
High-diameter spiral welded pipes require robust protection to maintain weld seam strength, surface quality, and coating integrity.
✔ Export Packaging Includes:
✔ Export Ports:
✔ Export Countries:
UAE, Saudi Arabia, Oman, Qatar, Kuwait, Bahrain, Egypt, Nigeria, South Africa, Kenya, Germany, Italy, UK, USA, Canada, Brazil & Mexico.
For Spiral Welded (HSAW) Pipes for oil & gas transmission, water lines, sewage pipelines, piling, and infrastructure projects, Inox Steel India offers certified quality, timely delivery, and highly competitive pricing.
52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004
alloy@inoxsteelindia.in, steel@inoxsteelindia.in
+91 9930796690
They are mainly used in oil & gas transmission, water pipelines, sewage systems, irrigation lines, and structural piling.
API 5L PSL1/PSL2, IS 3589, ASTM A139, EN 10219, ASTM A252.
Up to 120 inches (3048 mm).
Yes — coatings like 3LPE, FBE, internal epoxy significantly increase service life.
Suitable for low to medium pressure oil & gas pipelines (API PSL1/PSL2).
For high pressure → LSAW is preferred.
Yes — to GCC, Africa, Europe, USA, Canada, and South American regions.
Our technical team can assist with sizes, coatings, specifications, MTC, and project documentation.