How to Choose between LSAW and SSAW Pipe?

The main difference between LSAW and SSAW pipe is the weld seam. LSAW steel pipe (longitudinal submerged arc welded pipe) is made from steel plate and has a straight seam parallel to the pipe axis. SSAW steel pipe (spiral submerged arc welded pipe, also called HSAW) is made from hot-rolled coil and has a spiral seam wrapped around the pipe. They are two separate types of SAW (submerged arc welded) pipe. This page compares the difference between LSAW and SSAW in manufacturing, weld length, size range and applications.

How to Choose between LSAW and SSAW Pipe?

When selecting between LSAW pipe and SSAW pipe, it’s important to evaluate the project’s technical and economic requirements to ensure the most suitable type of welded pipe is used.

1. Operating pressure:

Start with the project specification and applicable standard, which may require a specific seam type.

2. Project budget:

Compare quotations on the same standard, grade, wall thickness and inspection scope. Price depends on size, steel cost and market conditions, not on pipe type alone.

3. Pipeline length and diameter:

SSAW pipes provide greater flexibility in diameter, while LSAW pipe size is limited by plate size and forming capacity. Confirm the manufacturer’s size range. For smaller diameters, ERW pipes are also commonly considered.
 

4. Dimensional acuracy:

Specify the required roundness, straightness and dimensional tolerance in the order, and confirm that the manufacturer can meet them.

With the continuous advancement of science and technology and the continuous changes in market demand, manufacturers of LSAW pipes and SSAW pipes should continue to increase investment in technological innovation and R&D to improve product quality and performance to adapt to market development trends.

Read  a full guide: LSAW vs SSAW Pipe: Differences, Uses & How to Choose

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