UPVC and CPVC valves, fittings, and pipes can effectively resist the erosion of salt and various chemical substances in seawater. UPVC and CPVC materials are non-conductive and not corroded by electrolysis or current. CPVC pipes can withstand high temperatures, with a maximum operating temperature of 110 ℃ and a long-term operating temperature of 95 ℃. They have good rigidity and toughness, excellent mechanical strength and pressure resistance, and are suitable for treating seawater containing complex chemical components