ERA Piping Systems, PVC Pipe Fitting ,Pressure Pipes, US4001, Schedule 40 (ASTM D2466) , NSF-pw & UPC System: The specification covers poly(vinyl chloride) (PVC) Schedule 40 pipe fittings. Included are requirements for materials, workmanship, dimensions, and burst pressure.PVC pipe product performance characteristicsn1. Light weight, easy to transport and load and unload: PVC pipes are very light, easy to transport and construct, and can save labor.n2. Excellent chemical resistance: PVC pipe has excellent acid resistance, alkali resistance, and corrosion resistance, and is very suitable for use in the chemical industry.n3. Small fluid resistance: The wall surface of PVC pipe is smooth and has small resistance to fluid. Its roughness coefficient is only 0.009, which is lower than other pipes. Under the same flow rate, the pipe diameter can be reduced.n4. High mechanical strength: PVC pipes have very good water pressure resistance, external pressure resistance, impact resistance, etc., and are suitable for piping projects under various conditions.n5. Good electrical insulation; PVC pipes have excellent electrical insulation and are suitable for wires, cable conduits, and wire piping in buildings.n6. Does not affect water quality: PVC pipes have been proven by dissolution tests to not affect water quality and are currently the best pipe materials for tap water piping.n7. Simple construction; the joint construction of PVC pipes is quick and easy.n