What is ERW steel pipe?
Resistance welded (ERW) steel pipe is a steel pipe product manufactured longitudinally using resistance welding technology. Resistance welding involves cold-forming hot-rolled steel coils into steel pipes via a series of rollers, and then welding/fusion by applying electric current.
What processing methods are suitable for S235JRH structural ERW steel pipe?
Suitable processing methods for S235JRH structural ERW steel pipe include welding and cold forming. Due to its low carbon content, this steel pipe is ideal for welding using standard welding electrodes without preheating.
What building structures are S235JRH structural ERW steel pipe mainly used in?
S235JRH structural ERW steel pipe is mainly used in the structural frames of buildings, such as beams and columns, bracing systems, and the overall framework of commercial, residential, and industrial buildings.
How is the quality of S235JRH structural ERW steel pipe inspected?
The quality inspection of S235JRH structural ERW steel pipes employs a multi-stage process, including non-destructive testing (NDT), mechanical property and chemical composition testing, and final visual and dimensional inspection. Key testing items include ultrasonic testing of welds, tensile testing, impact testing, and chemical composition analysis.
What is the difference between S235JRH structural ERW steel pipes and spiral welded pipes?
S235JRH structural ERW steel pipes are rolled from flat steel strips into pipes, and then welded longitudinally using a single high-frequency resistance weld to form a smooth and consistent inner surface. In contrast, spiral welded pipes are made by rolling steel strips into a continuous spiral weld at a helical angle before welding.
