Jiangsu PPH Flat Flange Price, Manufacturer's Phone, Wholesale [Jiangsu Jiayuan Pipe Valve Fitting Co., Ltd.] The PPH flat flange is a pipeline connection component widely used in chemical, water treatment, food processing, and other fields. Made of polypropylene (PP) material, it boasts excellent corrosion resistance, high-temperature resistance, and pressure resistance, ensuring long-term stable operation under harsh working conditions. The PPH flat flange, also known as polypropylene flat flange, is a flat pipeline connection component made of polypropylene (PP). It is commonly used with pipes, valves, pumps, and other equipment, achieving a sealed connection of the pipeline through bolt connections, etc.