In urban water supply and drainage projects, steel pipes are exposed to different water, soil, and operating conditions. Choosing the right anti corrosion steel pipe is essential for extending pipeline service life, reducing maintenance costs, and ensuring reliable operation.

Cold rolled seamless steel pipe is a precision steel tube produced by further processing hot rolled seamless pipe at room temperature. The cold rolling process gradually reduces the pipe's outside diameter and wall thickness, providing better dimensional accuracy, smoother surface finish, and consistent mechanical properties.

ASTM A53 Grade B Sch 40 ERW pipe is a general-purpose carbon steel welded pipe manufactured using electric resistance welding (ERW) technology and produced according to ASTM A53/A53M requirements. It combines ASTM A53 Grade B material with a Schedule 40 wall thickness designation, making it suitable for a wide range of low-pressure fluid transportation and general structural applications.