What is LSAW Pipe? LSAW is short for Longitudinally Submerged Arc Welding. And these 5 aspects will help you recognize it. I will clarify from the aspect: raw material, weld seam, size range, welding method, and length. From these five aspects, you will know the characters of this kinds of pipe in these simple ways.
(1) Raw Material of LSAW Steel Pipe
Usually, the raw material for this pipe should be Steel Plate. It isn’t the same as SSAW or erw pipe, they use steel coil. From these aspects you can see that its wall thickness is thicker than other pipes. As an LSAW pipe manufacturer, we choose raw material from the big steel factory in domestic, such as Tang Steel, Han Steel. And we choose raw material according to the usage of pipes.
Steel plate classify:
- Structural steel for bridge
- Structural steel for bridge(ASTM),
- Steel plates for boilers and pressure vessels
- Low alloy steel plates for low-temperature pressure vessels
- Holl-rolling quality carbon structural steel plate
- Steel plate for pipeline
- Hull structural steel
- Hot rolled products of structural steels(CE)
- And etc.
So we can see that it can stand low temperature, and it can bear high pressure from inside and outside.
(2) Weld Seam of LSAW
1. The shape of weld seam
We know that LSAW is longitudinally submerged arc welded steel pipe, so its weld seam is straight.
2. Number of weld seam
Usually, the LSAW pipe has one weld seam, but in some special conditions, it has 2 weld seam. We can choose two weld seam when size above 914 mm. Of course this all according to the customer’s requirements.
(3) Size Range:
Its size ranging from 406.4 mm to 1422.0 mm.
Wall thickness is from 6.0mm to 40.0mm. And the price of the pipe is different. The price of the steel plate between 8mm~20mm will be cheaper than others.
(4) Welding Method
It has two types of welding method.
1. JCOE forming technology
Our company uses JCOE forming technology. After the pre-bending step, for the first half of the steel plate, it is pressed into a “J” shape, while the left half of the same steel plate is pressed into a shape“C”. Final opening forms an “O” shape. That is why it was called the JCOE forming method.
2. UOE Forming Technology
UOE forming technology is almost the same with JCOE method, except the forming method, it is shaped to “U” shape and ”O” shape.
(5) Length Of LSAW Pipe
Maybe you know that SSAW pipe can do 33m length, I have seen that kind of pipe. Because SSAW pipe uses steel coil as raw material.
And once the workshop is enough big, it has no limitation in length. But for the LSAW, it is limited by the length of the steel plate. And usually, the steel plate is thick. So if the pipe length is too long, the equipment could not stand. So the length for it is max. 15m. ( 6 m and 12 m pipe loading )
If the customer requires longer than 15, we could choose T-pipe. We recommend T-Pipe.
T-pipe is to weld two pipes together to get the required length. This acc.customer’s requirements.
From these 5 aspects, we can see that the LSAW pipe has its own characters. And from these 5 aspects, we can know it in a simple way. If you want to learn more about the it, please see LSAW pipe manufacturing process.