JIS B 2220-2012 “Steel Pipe Flanges” JIS 巳 2239-2004 “Cast Iron Pipe Flanges11 JIS B JIS B 22402006 “Copper Alloy Pipe Flanges” JIS B 2241-2006 “Aluminium alloy pipe flanges” JAS Standard Gasket Size FF Nominal diameter I.D. of Di For full-face seat, large flat seat, and small flat seat flanges Gasket […]