... resistance,anti-deposition and long service life,PP-R pipe also enjoy some other advantages,like hygienicness,heatresistance ... environment-friendly construction material.Compared with aluminum multiunit pipe ,PP-R pipe can be made into tubular products with ... 160mms in caliber.Mingda PP-R pipes and pipe fittings are widely used in such areas as ... ,planting in gardens, parks and ranches,etc. PPR pipe