LSAW, standing for Longitudinally Submerged Arc Welding, steel pipe refers to a type of steel tubing that is produced using a single sheet of medium-to-heavy plate steel. The following provides a detailed introduction to LSAW steel pipes:
I. Definition and Manufacturing Process
LSAW steel pipe is made by pressing (rolling) the steel plate into a tube blank in a mold or forming machine, and then welding it using the double-sided submerged arc welding method, followed by expansion. This manufacturing process results in LSAW steel pipes with good weld toughness, plasticity, uniformity, and compactness.
II. Forming Methods
LSAW steel pipes can be classified into several types based on their forming methods, mainly including:
- UOE Welded Pipe: A single steel plate is pre-bent at the edges and then subjected to U-shaping, O-shaping, inner welding, outer welding, mechanical cold expansion, and other processes to produce the pipe.
- JCOE Welded Pipe: Pre-welding, forming, welding, and then cold expansion processes are carried out in the sequence of “J-C-O-E”. This is the mainstream forming process for LSAW steel pipes, featuring strong process adaptability and low operating costs.
- HME Welded Pipe: Formed by the mandrel roll method in the sequence of “C-C-O”, welding, and then cold expansion processes.
III. Performance Characteristics
LSAW steel pipes exhibit a series of superior performance characteristics, including:
- Strong Pressure Bearing Capacity: Due to their high-quality manufacturing process and weld quality, LSAW steel pipes can withstand high pressures.
- High Weld Quality: The double-sided submerged arc welding method ensures the uniformity and compactness of the weld, improving its quality.
- Wide Range of Specifications: LSAW steel pipes come in a wide range of finished specifications, meeting the needs of different fields and occasions.
- Resistance to High Pressure, Low Temperature, and Corrosion: These properties allow LSAW steel pipes to maintain stable performance in harsh environments.
IV. Application Fields
LSAW steel pipes have a wide range of applications in multiple fields, including but not limited to:
- Machining: Used in manufacturing mechanical structures and piping.
- Construction Engineering: Used in manufacturing natural gas pipelines, scaffolding, etc.
- Automobile Manufacturing: Used in manufacturing automobile chassis and exhaust pipes.
- Petrochemical Industry: Used for transporting fluid media in the petroleum, natural gas, and other industries.
In summary, LSAW steel pipe is an industrial tubing with superior performance and a wide range of applications. Its simple manufacturing process, high weld quality, and strong pressure-bearing capacity make it widely used in multiple fields.
