L245 straight seam steel pipe is a key pipe material widely used in energy transmission, construction, and other fields. Its cutting quality and weld heat treatment process are directly related to the product’s performance and service life.
During the cutting process, advanced cutting technology and equipment are key to ensuring a burr-free cross-section of L245 straight seam steel pipe. Today, fully automatic horizontal pipe cutting machines, with their high-precision servo feeding systems, enable batch cutting of steel pipes, resulting in smooth, burr-free cross-sections. This burr-free cutting not only enhances the pipe’s aesthetics but, more importantly, avoids stress concentration caused by burrs, reducing the risk of defects such as cracks during use, thereby improving the pipe’s overall quality and reliability.
Weld heat treatment is a critical step in the production of L245 straight seam steel pipe. Medium-frequency induction heating normalizing immediately after welding is a common and effective method. The temperature is generally controlled at 900 ± 20°C, and the holding time is determined by the pipe’s wall thickness. This heat treatment process effectively improves the microstructure and properties of the weld and heat-affected zone. Heat treatment reduces weld residual stress, with increasing heat treatment temperature improving the residual stress reduction effect. It also enhances the steel pipe’s resistance to stress corrosion, which is crucial for the long-term, stable operation of L245 straight seam steel pipe in complex environments. For example, in oil and gas pipeline construction, steel pipes must withstand internal water pressure, as well as bending moments caused by their own weight and the water. Proper weld heat treatment ensures stable performance under these complex loads.
Furthermore, after weld heat treatment, a series of quality inspections, such as hydrostatic testing and non-destructive testing, are required to ensure that the steel pipe meets standard requirements. Through precise cutting techniques and scientific weld heat treatment, L245 straight seam steel pipe provides high-quality, high-performance pipes for various projects, significantly promoting the development of related industries.
Post time: Aug-12-2025