Japanese Flange Application Standard (JIS)
Nominal diameter: DN10~DN1000mm Pressure level: 8 levels of IOK, 16K, 20K, 30K, 40K, 63K Flange sealing surface: 5 types: smooth surface, large convex surface, small convex surface, concave and convex surface, tongue and groove surface Flange type: flat welding (SO), socket welding (SW), butt welding (WN), threaded connection (TH), loose sleeve and flange cover (BL), etc. Example 1: JIS 21/2 10K f...