Jiangsu PP Elbow Manufacturer, Wholesale, Price [Jiangsu Jiayuan Pipe Valve Co., Ltd.] PP elbows, also known as polypropylene elbows, are pipe fittings made from polypropylene (PP) material. Polypropylene is a semi-crystalline thermoplastic material with excellent chemical resistance, heat resistance, electrical insulation, and mechanical strength. PP elbows are widely used in pipeline systems in industries such as chemicals, petroleum, power, metallurgy, water treatment, and construction, to change the flow direction of fluids (such as gases, liquids) to meet process requirements or adapt to pipeline layout.