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ERW vs LSAW vs SSAW: Quick Comparison Table
The table below summarizes how ERW, LSAW and SSAW differ across the factors that matter most when specifying pipe for a project — welding process, size range, pressure rating, cost and the standards each type typically meets. Use it as a quick reference, then check the sections and detailed guides below for the reasoning behind each figure.
| ERW | LSAW | SSAW | |
| Full name | Electric Resistance Welded Pipe | Longitudinal Submerged Arc Welded Pipe | Spiral Submerged Arc Welded Pipe |
| Weld shape | Straight seam | Straight seam | Spiral seam |
| Welding process | High-frequency induction/contact welding | Double-sided submerged arc welding (UOE/JCOE/HME) | Submerged arc welding, spiral forming |
| Raw material | Hot-rolled steel coil | Single medium/thick steel plate | Steel coil |
| Typical diameter | Small–medium | Large | Small–large (flexible) |
| Typical wall thickness | Thin | Thick | Medium |
| Dimensional accuracy | High | High | Moderate |
| Pressure resistance | Medium–high | High | Low–medium |
| Cost | Low | Higher | Lowest |
| Typical use | Urban gas, oil/product transport, structural | Long-distance oil & gas trunk lines, offshore, high-pressure | Water pipelines, piling, low-pressure/non-critical lines |
| Common standard | API 5L, ASTM A53 | API 5L PSL2, DNV | API 5L PSL1 |
How to Choose the Right Pipe Type
Need a large diameter, thick wall for high-pressure or long-distance oil/gas trunk lines → LSAW is the safer choice, and often the only compliant option for Class 1/2 pipeline areas.
Working with small-to-medium diameter, thinner-wall pipe for gas distribution or moderate-pressure service → ERW offers strong dimensional accuracy at a lower cost.
Prioritizing budget and need a wide range of diameters produced from the same coil → SSAW is the most economical, but limited to lower-pressure or non-critical applications (Class 3/4 areas).
Still unsure? Match your project's operating pressure, pipe diameter, and governing standard (e.g. API 5L PSL1 vs PSL2) against the comparison table above, or see the detailed pairwise comparisons below.
Read full guide: ERW vs LSAW vs SSAW Steel Pipe: Difference & How to choose
Article source: https://article-realm.com/article/Business/84360-ERW-vs-LSAW-vs-SSAW-Steel-Pipe-Difference.html
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https://www.permanentsteel.com/Permanent Steel Manufacturing Co.,Ltd have years of experience in manufacturing of carbon steel pipe, stainless steel tube, hollow section, pipe fittings.(Fluid Pipe/Boiler Tube/Fire Pipe/Line
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