Application： Applicable to various pipes of Class150～600,working temperature of -29～425°C（carbon steel）、-40～500°C（stainless steel）to prevent opposite flowing of fluids. Different materials of valves can endure many fluids like water, vapour, oil, nitric acid, acetic acid, intense oxidation fluid and urea, etc. Standards: Manufacture Face to face/end to end dimensions Pipe flange Testing & inspection API594API 6DBS,JIS API594 API 6D GB/T15188.2DIN3202 ANSI B16.5 GB9112～9131JB/T74～90SH3006 HG20615～20635 API598 ZBJ16006 Body material:WCB、CF8、CF3、CF8M、CF3M、ZG1Cr18Ni9Ti、 ZG1Cr18Ni12Mo2Ti Type of connection：Wafer Nominal pressure or pressure rating Nominal diameter DN/NPS（mm/in） 50 65 80 100 125 150 200 250 300 350 400 450 500 600 700 750 900 2 2.5 3 4 5 6 8 10 12 14 16 18 20 24 28 30 36 Class 150 √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ Class 300 √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ Class 600 √ √ √ √ √ √ √ √ √ √ √ √ √ √ √ Class 900 √ √ √ √ √ √ √ √ √ √ √ √ √ √ Class 1500 √ √ √ √ √ √ √ √ √ √ √ √ Class 2500 √ √ √ √ √ √ √ √ √ √ √