... # 4)Size:DN15-DN1000 Forged Process,all kind of flanges.Size 1/2"-48",DN15-DN1000.Pressure :150LBS-3000LBS ... ,UNI,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 ...