Lsaw Pipe
What Is Lsaw Pipe？
LSAW stands for Longitudinally Submerged Arc-Welded, also known as SAWL pipe. It uses steel plates as raw materials, is bent through JCOE or UOE molds, and then welded longitudinally by submerged arc welding.
Characteristics of LSAW
If you are sure whether it is LSAW, you can judge it based on the following points
- The weld is a longitudinal straight weld parallel to the length of the pipe
- The outer diameter of LSAW pipes is almost always above 219.1mm (8 inches)
- The raw material of LSAW pipe is high-quality steel plate, which is resistant to high temperature and high pressure and has strong pressure bearing capacity.
Lsaw Pipe Two Molding Processes
JCOE molding process
J （ Jumping pressing）This process is to press the edge of the steel plate into a “J” shape
C（forming）Through multiple forming pressures, the steel plate is made into a “C” shape
O（forming）Close the “C” shaped steel plate from the previous step into an O shape
E（Expanding）Expanding the welded steel plate is the most important step, which can eliminate residual stress and make the pipe shape more regular and the size more accurate.
UOE molding process
U （forming）Extruding the steel plate into a “U” shape
O（forming）Close the “U” shaped steel plate from the previous step into an O shape
E（Expanding）Mechanical expansion
If you want to know more about the two LSAW processes, please click here
LSAW Steel Pipe Dimension Chart
LSAW pipe sizes typically range from 219.1mm to 1626mm（8″ to 64″）（DN200 to DN1600）
Thickness is usually 6mm to 75mm.
Length is usually 3 to 18 mtrs
Common Pipe Sizes
- Nominal Diameter (inches): 20″
Outer Diameter (OD, mm): 508
Wall Thickness (WT, mm): 12.7, 14.3, 16, 17.5
Application: Commonly used in onshore and offshore pipelines - Nominal Diameter (inches): 24″
Outer Diameter (OD, mm): 610
Wall Thickness (WT, mm): 14.3, 15.9, 17.5, 20.6
Application: This size is the classic size of the main pipeline on land - Nominal Diameter (inches): 30″
Outer Diameter (OD, mm): 762
Wall Thickness (WT, mm): 17.5, 20.6, 22.2, 25.4
Application: Pipes of this size are common on land with high flow rates, or in some seafront pipelines.
Longitudinally Submerged Arc-Welded Pipe Advantage
Good pressure bearing capacity
The raw material steel plate determines the good pressure bearing capacity of Lsaw, and the wall thickness and material can be controlled to produce extremely pressure-resistant pipes.
High dimensional accuracy
The mechanical expansion of the pipe diameter can make the pipe size and wall thickness precision very high, and also make the pipe very straight.
High security
The weld quality is high, the submerged arc welding has a large penetration depth, the weld composition is stable, and the defect rate is low. In addition, the welds have been 100% subjected to non-destructive testing such as ultrasonic and X-ray. Even in extremely cold areas, brittle fracture can be prevented.
China Lsaw Pipe Supplier
All the pipe sizes in the table above are available at PANDAPIPE! PANDAPIPE is a pipe company that integrates production and sales. Founded in 1998, with over 20 years of history, we are committed to providing high-quality pipes and a full range of services. PANDAPIPE is definitely a pipe company you can trust.You can contact us by clicking the button below.
FAQs:
Differences between LSAW pipe and SSAW pipe
| LSAW | SSAW | |
| Raw materials | teel plate | Steel Coil |
| Weld seam shape | A vertical seam | A continuous spiral seam |
| Typical dimensions | Large diameter (≥406mm or 16 inches) | Medium to large diameter (wide range, typically 219mm-3000mm) |
| Wall thickness | Can produce thick-walled pipes | Wide range of wall thickness |
| Pressure bearing capacity | Highest | Higher |
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