Spiral welded pipe is large-diameter steel pipe produced by coiling hot-rolled strip helically and joining it with submerged arc welding inside and out.
This production method allows much larger diameters than straight-seam pipe, which is why it is the standard solution for transmission mains and infrastructure work.
Technical specifications
| Diameter | 219 – 2,020 mm |
|---|---|
| Wall thickness | 4.00 – 16.00 mm |
| Grade | S235JR – S355JR |
| Standard | EN 10217-1 / API 5L |
| Welding | Submerged arc, inside and out |
| Use | Drinking water, infrastructure, piling |
Why a spiral weld
The helical weld seam distributes stress along the axis of the pipe and makes it possible to produce large-diameter pipe from wide strip.
Submerged arc welding inside and out brings the strength of the seam into line with that of the body.
Where it is used
- Transmission mains and large-diameter drinking water conveyance
- Casing pipe for bored piles
- Water discharge lines on construction sites
- Load-bearing members in energy and infrastructure projects
When ordering
Besides diameter, wall thickness, grade and length, state your coating and end-finishing requirements: epoxy coating, internal lining or flanged ends may be needed.
Also write which standard (EN 10217-1 or API 5L) you require conformity to; the test and certificate set varies accordingly.