Jiangsu PPH Cap Wholesale Price Quote [Jiangsu Jiayuan Pipe Valve Fitting Co., Ltd.] PPH Cap, also known as Polypropylene Homopolymer (PPH) Cap, is a component used in pipeline systems for sealing pipeline ends or connecting points. Material: PPH Caps are made of Polypropylene Homopolymer (PPH) material. PPH is a high-density, high-crystallinity thermoplastic material with excellent chemical resistance, heat resistance, mechanical properties, and processing performance. Features: Corrosion Resistance: PPH material has excellent corrosion resistance to a variety of chemicals, suitable for pipeline systems in various corrosive media.