... with black paint Material: Carbon steel/stainless steel standard:EN UNI carbon steel welding flange:Surface coated with black paint.Size ... : 1/2''-72''Material: Carbon steel/stainless steelStandard: DIN,ANSI,UNI,JISProcess: Forged/castStructure type:Slip on flange,Welding neck flange ... :transparent oil,unti rust oil,hot galvanizing. carbon steel A105 UNI welding neck flange