We succeed in researching the large caliber hollow wall twine pipes production lines on the foundation of abundantly absorbing and digesting European technology . The pipes we produced base on high density polythene (PE) as main material. The rectangle pipes are extruded by the first extruder and then enter into the twine form machine , at the same time , the second extruder spray the rubber strips and then squeeze to reunite it , It outside wall is neat and smooth . Specification is Φ400-Φ2500mm. According to different usage term , the hardness degree of ring is divided into four grades and the Max can reach 16KN/m2 . It is suitable for the sour alkali liquid below 10%.
This kind of pipes have many extremely excellent character-istics, such as , corrosion resistant light ,easy to fix , long life time (50years),etc , It can substitute the pipes made of high energy consumption material (cement , cast iron , porcelain and ceramics , etc) .lt is widely used for sewer in superhigh-way, municipal construction , flats , athetic field, square , mine agricltrue , and bridges etc.
Main Technical parameter:

Model	Pipe diameter	Extruder		Total volume (kw)	Max.capacity (kg/h)	Overall dimension (LxWxH)
		Model	Power(kw)
CRG800	200-800	SJ75x33 SJ65x30	110 37	230	400	24x10x3
CRG1200	300-1200	SJ75x33 SJ65x30	110 37	260	550	30x13x5
CRG1600	800-1600	SJ90x33 SJ65x33	160 55	350	650	32x14x6
CRG2200	1200-2200	SJ120x33 SJ75x33	250 90	520	750	36x16x8
CRG3000	2200-3000	SJ120x33 SJ75x33	280 110	620	900	36x16x8