| Type | Process | Key Features | Applications |
|---|---|---|---|
|
ERW/HFW Pipe (Electric Resistance/High-Frequency Welded) |
Steel strip formed → edges heated by HF current (100–500 kHz) → pressure welded. |
- Seamless-like appearance - OD tolerance: ±0.5% - Cost-efficient |
Oil/gas pipelines, scaffolding, automotive frames |
|
LSAW Pipe (Longitudinal Submerged Arc Welded) |
Steel plate → U/O forming → single straight seam welded via submerged arc. |
- Thick walls (up to 40mm) - High pressure rating - Weld inspected by RT/UT |
Offshore pipelines, piling, structural columns |
|
SSAW Pipe (Spiral Submerged Arc Welded) |
Coiled steel → spiral forming → helical seam welded under flux. |
- Large diameters (up to 4m) - Flexible length - Lower dimensional accuracy |
Water transmission, foundations, low-pressure fluid transport |
|
CW Pipe (Continuous Welded) |
Hot-rolled strip → continuous furnace welding (obsolete). |
- Low cost - Poor weld integrity - Limited to low-pressure use |
Fencing, drainage (gradually phased out) |
| Laser Welded Pipe | Precision laser beam fuses edges (no filler). |
Name: Crystal
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Tel：86-18602606269
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Email：crystal@yashanway.com
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