... -on flange,welding neck flange,socket welding flange,threaded flanged,lap joint flange,blind flange,ring joint flange,long welding neck ... EuropeReportsMaterial test (as per EN10204 3.1)1 Chemical composition (C,Mn,P,S,Si,Cu,Ni,Cr,Mo,V,CE ... to your enquiry! ANSI NACE MR 0175standard & non-standard F51 lap joint flange