LSAW (longitudinal submerged arc welded) steel pipe is a steel pipe manufactured through the submerged arc welding process and has a series of production factors and characteristics. The following are the production elements and characteristics of LSAW steel pipes.
Production Elements of LSAW Steel Pipe:
- Steel plate material: The main raw material required to produce longitudinal submerged arc welded steel pipes is steel plate or steel coil. These steel materials are usually hot-rolled or cold-rolled carbon steel or alloy steel.
- Pipe Design: Determining pipe specifications, dimensions and quality standards to meet specific application needs.
- Pipe Cutting: Cutting steel plates or steel coils into appropriate lengths and widths to prepare the starting material for pipes.
- Edge treatment: Preparing the edges of steel plates or steel coils for welding by chamfering or chamfering.
- Pipe forming: rolling steel plates or steel coils into tube shapes to form a round or square steel pipe.
- Submerged arc welding: Using the submerged arc welding process, the long side seams of the pipe are welded together through arc and welding wire. Submerged arc welding provides high-quality welds and is suitable for high-pressure and high-temperature environments.
- Cold roll forming: Through the cold roll forming process, the diameter and wall thickness of the steel pipe are adjusted to ensure that it meets the specifications.
- Non-destructive testing: Perform various non-destructive testing such as ultrasonic, X-ray or magnetic particle testing to check the quality of welds and pipes.
-Trimming and Cutting: Trim the ends of the pipe to make sure they are flat and plumb. Then, cut the steel pipe to the desired length.
- Pipe heat treatment: annealing or normalizing heat treatment is performed to improve the mechanical properties and metallurgical structure of the pipe.
- Surface treatment: Surface treatment by pickling, phosphating or spray painting to prevent corrosion.
- Inspection and Quality Control: Conduct terminal inspections to ensure pipes meet specifications and quality standards.
Characteristics of LSAW Steel Pipe:
- High-Quality Welds: The submerged arc welding process provides high-quality, uniform welds for applications requiring high strength and pressure resistance.
- Suitable for large-diameter pipes: Longitudinal submerged arc welding can manufacture large-diameter steel pipes, such as oil pipelines or pipelines.
- Suitable for high pressure and high temperature: Due to the high quality of the weld, longitudinal submerged arc welded steel pipe is suitable for high pressure and high temperature environments, such as oil and natural gas transmission pipelines.
- High production efficiency: This process is suitable for mass production because it can be operated continuously and improves production efficiency.
- Widely used: Longitudinal submerged arc welded steel pipes are widely used in petroleum, natural gas, water conservancy projects, construction, chemical industry and other fields.
In general, longitudinal submerged arc welded steel pipe is a high-quality, high-strength, pressure-resistant pipe material suitable for a variety of important application fields. Its production process requires strict control and quality testing to ensure that qualified products are manufactured.
United Steel Industry As the most important steel pipe manufacturer and exporter in China, in the past 20 years, we have completed more than 100 projects, with partners in more than 100 countries, and established relationships with oil and gas and EPC companies in many countries business relationship.
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