... ,AS2129,EN1092,GB,HG,SH,SHJ,SGJ international standard.ANSI standard :ANSI b16.5,16.36,16.47,16.48, ... MSS SP44DIN standard: DIN2527,2566,2573,2641,2642,2638,2655 etc ... .JIS B22220 standardBS 4504 standardUNI standard: UNI 2276,2277,6083,2280,2283 and so ... onGB standard : GB,HG,SH,SHJ,SGJMaterial: carbon steel ... NECK,SLIP ON,BLIND Rf and So flange