Home > Welded Pipes > SAW / LSAW / HSAW Pipes
Inox Steel India is one of India’s leading manufacturers, suppliers, and global exporters of SAW (Submerged Arc Welded), LSAW (Longitudinal SAW) and HSAW / Spiral Welded (Helical SAW) Pipes, primarily used for large-diameter oil, gas, water, and hydrocarbon transmission pipelines.
We manufacture high-strength large OD welded pipes conforming to API 5L PSL1 / PSL2, ASTM A671, A672, ASTM A139, IS 3589, EN 10219, and international project specifications.
Our SAW / LSAW / HSAW pipes are supplied to pipeline contractors, EPC companies, oil & gas majors, water board projects, offshore installers, and industrial infrastructure developers across GCC, Middle East, Africa, Europe, North America & South America.
Every pipe is subjected to hydrostatic testing, ultrasonic testing, radiography, weld integrity checks, Charpy impact testing, flattening test, bend test, and third-party inspection (SGS / BV / DNV / TÜV / Lloyd’s) ensuring full compliance and reliability.
SAW (Submerged Arc Welded) Pipes
SAW pipes are produced by feeding filler wire into a submerged arc welding process, creating a deep, strong weld suitable for thick-wall and high-pressure service.
LSAW (Longitudinal Submerged Arc Welded) Pipes
LSAW pipes have a straight longitudinal weld seam, produced from steel plates rolled into a cylinder.
These pipes are ideal for high-pressure oil & gas pipelines, offshore pipelines, and structural foundations.
HSAW / Spiral Welded Pipes (Helical SAW)
HSAW pipes are manufactured by continuously welding a steel coil to form a spiral weld seam, allowing production of very large diameters (up to 120 inches) cost-effectively.
Each type has a defined manufacturing method, but the core stages remain consistent:
1️⃣ Raw Material – Plates / Coils Selection
2️⃣ Pipe Forming
LSAW — UOE or JCOE Process
HSAW — Spiral Forming
SAW — Standard Plate Forming
3️⃣ Submerged Arc Welding (Inside & Outside Weld)
In all variants, the welding process involves:
This ensures weld strength suitable for long-distance, high-pressure pipelines.
4️⃣ Weld Bead Removal & Grinding
Internal and external weld beads are cleaned for:
5️⃣ Expansion & Calibration
Pipes are expanded to achieve:
6️⃣ Non-Destructive Testing (NDT)
Mandatory tests include:
7️⃣ Anti-Corrosion Coating (Optional)
Large-diameter pipelines usually need protective coatings:
8️⃣ Final Inspection, Marking & Export Packing
Pipes are marked with:
Packed with external strappings, wooden supports, and end protection for long-distance shipping.
1. High Strength for High-Pressure Transport
Ideal for oil, natural gas, hydrocarbons & water transmission.
2. Large OD Capability (up to 120 inches)
Perfect for municipal water supply & cross-country pipelines.
3. Excellent Weld Integrity
Submerged arc welding ensures deep, defect-free fusion.
4. Suitable for Thick-Wall Construction
Can support heavy structural loads & dense fluid pressures.
5. Compliant with Oil & Gas Majors’ Specifications
Meets API 5L PSL1/PSL2 chemical, mechanical & CVN requirements.
6. Cost-Effective for Large-Diameter Projects
Especially spiral welded (HSAW) lines for water & sewage systems.
🔹 Oil & Gas Transmission Pipelines
Long-distance transport of crude oil, natural gas & refined products.
🔹Water & Sewage Transmission
Large OD spiral welded pipes supply drinking & industrial water globally.
🔹Hydrocarbon Process Lines
Onshore & offshore process piping networks.
🔹Structural & Offshore Foundations
LSAW pipes used in piles, jetties, platforms & monopiles.
🔹 Bridges, Dams, Marine Structures
Heavy load-bearing applications.
🔹City Gas Distribution (CGD) Networks
API 5L pipes used for urban gas supply grids.
🔹 Industrial Utilities
Cooling water, slurry lines, effluent systems.
Pipeline engineers and EPC contractors choose SAW/LSAW/HSAW pipes based on
pressure class, diameter, wall thickness, transportation distance, soil conditions, and routing complexity.
Below is the complete engineering selection guide, following the same style as your seamless pipe page.
Standards: API 5L, ASTM A671, A672, ASTM A139, EN 10219, IS 3589
| Parameter / Property | LSAW Pipes (Longitudinal Submerged Arc Welded) | HSAW Pipes / Spiral Welded (Helical SAW) | SAW Pipes (General Submerged Arc Welded) |
|---|---|---|---|
| Standard / Specification | API 5L PSL1/PSL2, ASTM A671/A672 | API 5L, ASTM A139, IS 3589 | ASTM A671/A672, API 5L |
| Material Type | Carbon Steel / Alloy Steel | Carbon Steel | Carbon Steel / Alloy Steel |
| UNS Designation | K03006 (Gr B), K03011 (X52), K03012 (X60) | K03006 (Gr B), K03012 (X60/X70) | Grade dependent |
| Equivalent EN / DIN / JIS | EN 10219 / EN 10217 | EN 10219 | EN 10219 / DIN 2450 |
| Chemical Composition (% Max) | C: 0.20–0.28, Mn: 1.0–1.4, Si: 0.18–0.35 | C: 0.18–0.26, Mn: 1.0–1.2 | Depends on grade (A671/A672) |
| Tensile Strength (MPa) | 415 – 760 | 415 – 660 | 415 – 760 |
| Yield Strength (MPa) | 240 – 485 | 240 – 460 | 240 – 485 |
| Elongation (%) | ≥ 20 | ≥ 18 | ≥ 20 |
| Hardness (HB) | ≤ 235 | ≤ 235 | ≤ 235 |
| Corrosion Resistance | Medium (coating required) | Medium (coating required) | Medium–High (grade dependent) |
| Temperature Range (°C) | -29°C to 450°C | -20°C to 400°C | -29°C to 500°C |
| Typical Applications | Oil, gas, hydrocarbon transmission | Water, oil, gas transmission | High-pressure pipelines |
| Available Sizes (OD) | 16″ – 80″ | 16″ – 120″ | 16″ – 80″ |
| Wall Thickness | Up to 40 mm | Up to 32 mm | Up to 40 mm |
| Schedules | STD, XS, SCH 20–160 | STD, XS | STD, XS, SCH 20–160 |
| End Finishes | Bevelled, Plain, Weld Prep | Bevelled, Plain | Bevelled, Plain |
| Testing Requirements | 100% RT/UT/Hydro, CVN/CTOD | UT/Hydro, Spiral Weld NDT | RT/UT/Hydro |
| HSN Code | 7305.11 / 7305.12 | 7305.31 / 7305.39 | 7305.19 |
| Equivalent ASTM / ASME | ASTM A671 / A672 | ASTM A139 | ASTM A671 / A672 |
| Supply Condition | As-Welded / Stress Relieved | As-Welded | As-Welded / PWHT |
| Certifications & Docs | MTC 3.1/3.2, CE/PED, TPI, Hydro, UT | MTC, Hydro, Spiral NDT, TPI | MTC, PWHT Chart, TPI |
Just like seamless pipes have different grades (304/316/321 etc.),
SAW Pipes are categorized based on weld type and manufacturing method.
LSAW Pipes (Longitudinal Submerged Arc Welded)
Standards: API 5L, ASTM A671/A672, EN 10219
🔍 Where LSAW Pipes Are Used
⭐ Engineering Benefits
📌 Common Grades
HSAW / Spiral Welded Pipes (Helical SAW)
Standards: API 5L, ASTM A139, IS 3589
🔍 Where Spiral Pipes Are Used
⭐ Engineering Benefits
📌 Common Grades
Standard SAW Pipes (Double Submerged Arc Welded – DSAW)
Standards: ASTM A671, A672, API 5L
🔍 Where SAW Pipes Are Used
⭐ Engineering Benefits
📌 Common Grades
| OD (inch) | OD (mm) | Wall Thickness (mm) | Approx Weight (kg/m) |
|---|---|---|---|
| 16″ | 406.4 | 6.4 – 20 | 115 – 350 |
| 20″ | 508.0 | 6.4 – 25 | 165 – 480 |
| 24″ | 610.0 | 6.4 – 30 | 240 – 700 |
| 30″ | 762.0 | 8 – 32 | 350 – 950 |
| 36″ | 914.4 | 10 – 36 | 510 – 1500 |
| 42″ | 1066.8 | 12 – 38 | 720 – 1900 |
| 48″ | 1219.2 | 12 – 40 | 830 – 2200 |
| Grade / Type | OD Range | INR/MT (FOB India) | USD/MT (FOB India) | Typical Use |
|---|---|---|---|---|
| LSAW (API 5L X52/X60) | 16–60″ | ₹ 78,000 – ₹ 110,000 | $ 950 – $ 1350 | Oil/Gas Pipelines |
| LSAW (X65/X70 PSL2) | 16–48″ | ₹ 95,000 – ₹ 145,000 | $ 1200 – $ 1650 | Offshore / High-Pressure |
| HSAW Spiral (API Gr B/X42) | 18–120″ | ₹ 65,000 – ₹ 95,000 | $ 800 – $ 1180 | Water Transmission |
| HSAW Spiral (X52–X60) | 18–96″ | ₹ 75,000 – ₹ 115,000 | $ 920 – $ 1400 | Oil/Gas Distribution |
| SAW (A671 / A672) | 16–72″ | ₹ 72,000 – ₹ 125,000 | $ 880 – $ 1500 | Process Lines / Steam |
SAW/LSAW/HSAW Pipes undergo strict testing due to their use in transmission pipelines.
Mandatory Tests
Documentation Supplied
GCC & Middle East:
Africa:
Europe:
Americas:
Inox Steel India regularly exports large diameter SAW/LSAW/HSAW pipes to these regions.
Large-diameter pipeline projects demand extreme welding integrity, dimensional accuracy, coating quality, and full traceability — because these pipelines transport oil, gas, water, slurry, hydrocarbons, and industrial fluids across hundreds of kilometers.
Inox Steel India ensures that every SAW / LSAW / HSAW Pipe meets global project standards, weld quality benchmarks, and third-party inspection requirements, making us a preferred supplier for EPC contractors and pipeline developers worldwide.
Top Reasons to Choose Us
| Industry | Application | Material / Type |
|---|---|---|
| Oil & Gas Pipelines | Crude, natural gas, refined product transport | LSAW / HSAW (API X52–X70) |
| Water Transmission | Drinking water, irrigation, desalination | HSAW Spiral (Large OD) |
| Hydrocarbon Process | Onshore & offshore pipelines | LSAW / SAW |
| Marine & Offshore | Piles, jetties, offshore structures | LSAW Heavy Wall |
| Structural Foundations | Bridge piles, load-bearing columns | LSAW / SAW |
| City Gas Distribution | Urban gas supply networks | HSAW / LSAW |
| Power Plants | Cooling water, slurry lines | SAW / HSAW |
| Sewage & Drainage | Effluent & solid-waste pipelines | Spiral Welded Pipes |
✔ Export-Grade Protection
✔ For Coated Pipes (3LPE/FBE)
✔ Export Ports
✔ Exported to
UAE, Saudi Arabia, Oman, Qatar, Kuwait, Bahrain
Egypt, Nigeria, Kenya, South Africa
Germany, Italy, Poland, Spain
USA, Canada, Mexico, Brazil, Chile
Inox Steel India supplies SAW, LSAW & HSAW Pipes for cross-country transmission pipelines with full test reports, coating certificates & TPI approvals.
For API 5L PSL1/PSL2 certified pipes in Gr B to X70, contact us today.
52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004
alloy@inoxsteelindia.in, steel@inoxsteelindia.in
+91 9930796690
Yes — LSAW & DSAW are commonly used for API 5L PSL2 oil and gas pipelines.
3LPE, 3LPP, FBE, internal epoxy, and coal tar enamel.
From 16″ up to 120″, depending on type (HSAW largest).
Yes — API 5L X52/X56/X60/X65/X70 PSL2 available.
Yes — required for LSAW (longitudinal weld).
Yes, to GCC, Africa, Europe, USA, Canada & LATAM.
Inox Steel India supplies SAW, LSAW & HSAW Pipes for cross-country transmission pipelines with full test reports, coating certificates & TPI approvals.
For API 5L PSL1/PSL2 certified pipes in Gr B to X70, contact us today.