Yunik Chandna's Articles http://www.financealley.com en-us editorial@financealley.com Manufacture Polypropylene Pipes and PVC pipes Manufacturing of Polypropylene Pipes:- Polypropylene Pipes (PP) pipes and PPR pipes are manufactured by extrusion in the same way as PE pipes. Particularly in the case of PP pipes there are several different molecular structures available on the m... http://www.financealley.com/article_497988_15.html 27th March 2008