What is the difference between LSAW pipes and SSAW pipes?

- Sep 12, 2018-

What is the difference between LSAW pipes and SSAW pipes?

LSAW pipes (longitudinal submerged arc welding pipe) is made of steel plate and moulded by molding machine.Through this process, LSAW steel pipe will have excellent ductility, welding toughness, uniformity, plasticity and good tightness.
Diameter range and performance of LSAW pipes
The diameter range of LSAW pipes is larger than ERW, usually 16 to 60 inches, 406 to 1500 millimeters. The high pressure resistance and low temperature resistance has performance.
The application of LSAW pipes
LSAW pipes have been widely used in oil and gas pipelines, especially request large diameter and thick wall pipes of high strength and long distance. At the same time, the building structure needs tenacious strength, water treatment, thermal engineering, bridge building and so on. According to the API specification, the LSAW pipe is specifically designed for large oil and gas transport in the case of pipelines crossing cities, seas, and urban areas.These are level 1 and level 2 regions.

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SSAW pipes manufacturing process
SSAW pipes, also known as HSAW pipe, has a spiral shape. It adopts the same submerged arc welding technology as LSAW pipe. Different SSAW pipes are spirally welded, of which LSAW is longitudinally welded.The manufacturing process is to roll the steel strip, so that the rolling direction and the direction of the pipe center into a certain Angle, forming and welding, so that the weld is spiral.
Size range and performance of SSAW pipes
The diameters range of SSAW pipes from 20 inches to 100 inches, 406 millimeters to 2,540 millimeters.The advantage part is that we can get SSAW pipe of different diameters and steel strip of the same size. The raw material has a wide range of steel strip. The disadvantage is that the physical size is not good, the length of weld is greater than the length of pipeline, and it is easy to cause defects of cracks, pores, coal slag inclusions, local welding, and welding force under tension.
Application of SSAW pipes
For the oil and gas pipeline system, but in the oil design specification, the SSAW pipes/HSAW pipes can only be applied to level 3 and level 4 areas.Construction structure, water transport and sewage treatment, thermal industry, buildings, etc

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LSAW pipes has better performance than SSAW pipes
The SSAW pipes specification, as described above, defines the SSAW pipes to be used in less significant areas.So far, the United States, Japan and Germany have refused to take a stand on the SSAW pipes and have made no recommendations in key pipelines. Canada and Italy use the SSAW pipeline for part of the pipeline. SSAW's few Russian pipelines, plus they set strict enforcement terms. For China, most major pipelines still use SSAW because of historical factors.
Compared to seamless pipes, ERW pipes, SSAW pipe is mainly used for oil and gas transportation. Seamless steel pipes are mainly used for oil and gas drilling and exploration.
SSAW pipes, LSAW pipes are on sell from Beijing Metleader Pipeline Technology Inc.