1)Name: socket weld flange for oil 2)150-2500lb 3)Size:3/8-160" ... WN,SW,PL.BL,TH socket weld flange for oil Size1/2"-160"TypeWeld Neck flange(WN),Slip-On ... and alloy steel with yellow print, black print, oil or zinc.Flange Facing TypesRF(raised face);FF(flat ... groove face);MFM(male and female face)Facing Methodrust preventing oil, spray paint (black, yellow), hot galvanization, cold galvanization or ...