... )Connection:Butt Weld & Socket Weld & Thread 3)Standard:ASME,ANSI,BS,DIN,JIS,etc. 4)ISO 9001:2008 SO(Slip On) flange ... -Groove (T&G),Male-and-Female (M&F)StandardASME,ANSI,BS,DIN,JIS,etc.Surface Treatment Transparent oil, rust-proof black oil ... ,if you need any of these products,welcome to contact us.Factory AddressYanShan WuLiYao Industry Zone,CangZhou City,Hebei Province,China ...