Standard JIS B2220 is Japanese Industrial Standard for Steel Pipe Flanges published by JSA (Japanese Standards Association). Japanese projects have been build all over the world. As a result Slip-on-Plate (SOP) flanges 5K according JIS B2220 are common items in pipeline connections. SOP flanges are mostly used in less demanding connections. JIS 5K plate flanges can be easily welded in place and provide rigid and robust assembly. JIS slip-on-plate (SOP) flanges provide easy access for further mounting in place of valves and JIS standard equipment.
We keep on stock carbon steel plate flange JIS 5K grade SS400 with full face FF (same as flat face FF or face A in European standards).