What are the main performance characteristics of S235JR material?
S235JR is a low-carbon non-alloy structural steel conforming to EN 10025-2 standard, with a minimum yield strength of 235 MPa. Due to its low carbon content, it possesses excellent weldability and formability; good impact toughness at room temperature; and moderate tensile strength.
What are the differences in the forming methods between S235JR longitudinally welded steel pipe and S235JR spirally welded steel pipe?
The main difference lies in the forming process: S235JR longitudinally welded steel pipe is formed by bending steel strip and welding a straight weld along the length of the pipe, while S235JR spirally welded steel pipe is formed by rolling steel strip at a helical angle and welding along a spiral line. This means the former uses a straight weld, while the latter uses a spiral weld.
What are the commonly used welding methods for S235JR longitudinally welded steel pipes?
Common welding methods for longitudinally welded steel pipes, including S235JR, include resistance welding (ERW) and longitudinal submerged arc welding (LSAW). The arc welding technologies used in pipe welding include manual arc welding (SMAW), gas shielded metal arc welding (GMAW) (including MIG and MAG welding), flux-cored wire arc welding (FCAW), submerged arc welding, and tungsten inert gas welding (TIG).
What quality standards are typically used for S235JR longitudinally welded steel pipes?
S235JR longitudinally welded steel pipes are generally manufactured according to the European standard EN 10219, which covers the technology for cold-formed welded structural hollow profiles. Other relevant standards include EN 10210, the Chinese standard GB/T1591, and the American standard ASTM A53/A106.
What are the main application areas of S235JR longitudinally welded steel pipe?
S235JR longitudinally welded steel pipe is suitable for manufacturing large-diameter, thick-walled longitudinally welded steel pipes. It is commonly used in high-pressure applications such as oil and natural gas pipelines. Due to its high strength and good durability, it is also widely used in the energy sector, such as power plants, machinery manufacturing, and shipbuilding.
