The core of the wound pipe machine originated in the 18th century when Joseph Bramah's manual piston press for the manufacture of seamless lead pipes in 1795 is considered to be the world's first extruder. From then on, and for the first 50 years of the 19th century, the wound pipe machine was only

The Krah Pipe is formed by thermal winding high density polyethylene (HDPE) winding structure wall tube. The wall pipe is made of high density polyethylene resin as the main raw material, adopts the hot winding poplar process, and adopts the polypropylene (PP) single wall corrugated pipe as the supporting structure to produce the special structure wall pipe with high resistance to external pressure.

Krah pipe (HDPE winding pipe) is a flexible pipe. The Krah pipe has the advantages of good connection tightness, strong anti-settlement ability and long comprehensive service life, and has been rated as the key promotion of green environmental protection pipe products by the ministry of municipal construction of China.

Krah Pipe product is an environmental protection and safe type of pipeline product, because of its high quality characteristics are widely used in all kinds of pipeline engineering projects, so, the demand for Krah Pipe is also increasing day by day, which makes the quality of the Krah Pipe on the market at random, is irregular.