flange: 1.Standards:ANSI , JIS, DIN, GB, BS, AS.2.Production size(NPS):1/2 inch---98 inch3.type: Silp On flange, Welding Neck flange, Blind flange, Plate flangePressure Rating: Class 150,300,600,900,1500 and 2500Pressure Rating:PN6,PN10,PN16,PN25,PN40 and PN64Pressure rating : JIS 5K,10K,16K and 20KMaterials: Carbon steel, Stainless steel and Alloy steel etc.4.Material: 316L, 316Ti, 304L, 321, 321H, Rst37.2, C22.8 , A105