... Carbon steel/stainless steel standard:ANS ANSI Carbon Steel A105 Welding Neck Lange:Specifications:Surface coated with yellow paint.Size ... 10K-40K.Deaign and manufacture std:.Italyflanges(MaterialRst37.2,S235JRG2,A105)UNI2276,UNI2277,UNI2278, UNI6084,UNI6089,UNI6090,UNI2544,UNI2282,UNI6090, ... ,eg.stainless steel flat flange,carbon steel blind flange,ss welding neck flange,and slip on flange,and so ...