Polypropylene (PP) is a semi-rigid, translucent polymer with good toughness and weather resistance properties. PP has a density of 0.90 to 0.91 g/cm3 which is amongst the lowest densities for all plastics. PP is characterized by its outstanding chemical resistance and good fatigue strength. Due to its excellent thermal stability, PP can be used successfully even at 100 0 C. It is generally available in three forms for use in pipelines PP- Homopolymer (PP-H), PP-copolymer (PP-C) and PP Random Copolymer (PP-R). Other options in PP include fire retardant grades & electro-conductive grades. PP can also be UV stabilized by use of a stabilizer and can be produced in black color.