KS flange flange ,ASTM ,JIS,DIN,UIN,etc. flange,GAL flange,competitive price flange,ISO,KS ... :ASME B16.5,ASME B 16.47,DIN EN 1092-1,DIN 1759-1,MSS SP-44,API605, GB/T 9112 GB/T13402 HG ... ,10#,20#,16Mn,45#,Q345B,304,304L316,316L3.sizes:OD:1/2''--48''4.presure class:CL: Class 150, 300, 600 ...