What Are LSAW/HSAW?
Per API 5L (PSL1/PSL2), LSAW (Longitudinal Submerged Arc Welded) pipes are formed from heavy plates by UOE/JCOE press and double-side SAW. HSAW (Helical/Spiral) pipes are formed from hot-rolled coil wound at a controlled angle and helically welded per IS 3589. LSAW suits high-pressure oil & gas transmission (16"–48" OD, up to 40 mm wall); HSAW is the economical choice for water mains and piling (16"–120" OD). Both are hydrotested 100 % per API 5L.
- LSAW: 16"–48" OD, UOE/JCOE press formed, longitudinal SAW seam
- HSAW/Spiral: 16"–120" OD, continuous spiral forming from HR coil
- Wall thickness 6mm–40mm depending on diameter and pressure class
- Hydrotest to 100% per API 5L — every pipe tested before dispatch
Specifications We Stock
| Outer Diameter (OD) | LSAW: 16"–48" (406–1219mm), HSAW: 16"–120" (406–3048mm) |
|---|---|
| Wall Thickness (WT) | 6mm to 40mm |
| Grades | API 5L Gr B/X42/X52/X60/X65/X70, IS 3589 Gr 330/410 |
| Standards | API 5L PSL1/PSL2, IS 3589, ASTM A672, EN 10219 |
| Coating | 3LPE, 3LPP, FBE, coal tar enamel, cement mortar lining (CML) |
Common Applications
- Water Transmission: Bulk water mains, penstock pipes, irrigation canals, desalination plant piping.
- Oil & Gas: Crude oil pipelines, natural gas transmission, cross-country pipelines.
- Piling & Marine: Foundation piles, marine piles, jetty construction, cofferdams.
- Infrastructure: Bridge casings, culverts, tunnel liners, structural columns.
Source Mills We Work With
We procure materials exclusively from highly reputed Indian and global steel mills, including:
Jindal SAW LtdWelspun CorpMan IndustriesPSL Limited
How To Order
- Specify pipe type (LSAW or HSAW), OD, wall thickness, and grade (API 5L or IS 3589).
- Indicate coating requirement — 3LPE, FBE, bare, or cement mortar lined.
- Provide quantity (in meters or MT) and delivery location for freight calculation.
- Approve quotation and PO — we coordinate mill dispatch or stockyard supply.
Frequently Asked Questions
What is the difference between LSAW and HSAW pipes?
LSAW pipes have a straight longitudinal weld seam formed by pressing flat plate into a cylinder (UOE or JCOE process). They offer tighter dimensional tolerances and higher pressure ratings, making them preferred for oil & gas transmission. HSAW pipes have a spiral (helical) weld seam formed by continuously winding steel coil. They are more economical for large diameters (above 48") and are widely used for water mains and structural piling where extreme pressure is not required.
What is the maximum diameter available in HSAW pipes?
HSAW/spiral pipes can be manufactured up to 120" (3048mm) OD, far exceeding the practical limits of seamless and LSAW pipes. For diameters above 48", HSAW is typically the only economical option. Common water transmission sizes are 24" to 80" OD.
What coating options are available for large-diameter pipes?
External coatings include 3-Layer Polyethylene (3LPE), 3-Layer Polypropylene (3LPP), Fusion Bonded Epoxy (FBE), and coal tar enamel. Internal linings include cement mortar lining (CML) for water pipes and epoxy lining for corrosive fluids. Coating selection depends on soil conditions, fluid type, and project specification.
Related
- Calculate the weight of LSAW & HSAW Pipes for your BOQ — size, wall, and length to MT before requesting a quote.
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