... resistance, outer pressure resistance, erosion resistance(such as acid, alkali and salt etc. ), long life of approximate 50 years, no pollution ... city, it will replace the cement pipe, cast iron pipe and other pipes. Its low cost of assembling, easy operation, easy ... -Ø 2200SJ-900.5-565038028× 19× 5QSCRG-3000Ø 1600-Ø 3000SJ-900.3-380039048× 26× 6 3000mm HDPE Large Diameter Spiral Hose Extrusion Line