... PPR(Yanshan Petrochimical, Korea Hyosung)2. Pressure Grade: 1.6MPa.3. Design standard: GB/T8464-20084. Pipe thread standard: ISO2285. ... Corrosion resistant, not scaling, no rust, anti-bacterial.3. Light weight, high strength and high impact strength.4. Convenient installation, reliable, recycled, ... equipment.7. Piping system for other industries and agriculture. High quality double-head PPR ball valve