Manufactured from high-quality alloy structural steel with internal wall quenching and carburizing treatment, reaching a hardness of HRC55-62. Featuring patented delayed quenching and press-fit sleeve technology at the ends, the service life is increased by 30%, with a single-layer pipe conveying capacity of up to 40,000 cubic meters. A 3-meter pipe weighs only 46kg, offering a lightweight design that reduces fuel consumption and construction costs.