Manufacturing Process
Raw Materials: Flat plates made of materials such as low-carbon steel and alloy steel are typically used as the starting material.
Forming Process: After being uncoiled and flattened, the steel plate is fed into a forming machine where it is gradually bent into a spiral cylindrical shape.
Welding Process: Simultaneously with the forming, continuous welding is performed along the spiral edge to create a strong seam. In modern technology, high-frequency resistance welding or submerged arc welding is often employed to ensure high-quality welds.
Subsequent Treatment: After welding, the pipeline may undergo further processing steps such as cutting, expanding, and flaw detection to meet specific application requirements.
Structural Characteristics
Large Diameter and Long Length: Due to its unique manufacturing method, spiral steel pipe can be produced with larger diameters and longer lengths than straight-seam steel pipe.
Uniform Wall Thickness: By precisely controlling the forming and welding parameters, a relatively uniform wall thickness distribution can be achieved.
High Strength and Toughness: Proper material selection and rigorous production processes ensure good mechanical properties.
Performance Advantages
Cost-Effective: Compared to seamless steel pipe, spiral steel pipe has lower costs while maintaining sufficient strength and durability.
Versatile: Suitable for use in various harsh environments, such as marine engineering and oil and gas transportation.
Easy Transportation and Installation: Compared to other types of steel pipe of the same specifications, spiral steel pipe is lighter in weight, facilitating handling and on-site installation.
Application Fields
Oil and Gas Transportation: Used in pipeline construction between onshore and offshore oil and gas fields.
Water Conservancy Projects: For water transmission pipelines in large-scale water conservancy facilities such as diversion canals and irrigation systems.
Municipal Engineering: Main pipeline laying for urban water supply and drainage systems.
Industrial Use: Fluid transmission pipelines in industrial settings such as chemical plants and power plants.