1. Production equipment for reinforced concrete drainage pipes: mixing systems, pipe molds (plain, socket, spigot, double spigot, steel socket), forming machines (centrifugal machines, suspended roller machines, vertical axial extrusion forming machines, vertical radial extrusion forming machines, core mold vibration hydraulic forming machines, vertical radial extrusion forming machines, core mold vibration hydraulic forming machines, vibration forming devices), feeding machines, steel disc frame roll welding machines, hydraulic presses, external pressure machines, etc.

2. Drain pipe specifications include inner diameter DO (100mm - 3000mm), length LO (30mm - 200mm), pressure index, and grades: I, II, III. The mouth types are: flat mouth, socket mouth, spigot mouth, double socket mouth, and steel socket mouth.

The drainage pipe is a new type of permeable plastic pipe material with a corrugated shape, formed by adding other additives to high-density polyethylene (HDPE). The permeable corrugated pipe is made by punching holes in the grooves and wrapping the outer circumference with a needle-punched geotextile. It can be categorized into single-wall permeable corrugated pipe and double-wall permeable corrugated pipe based on the type of corrugated pipe.