1:Std.: API 600, API 6D, API 603etc 2:Cert: ISO9001, API 6D 3:Materials: C.S, S.S,etc. 4: ... :150LB-2 Production enforce standard Design and manufacture --- Api600,API6DFace to Face --- ANSI B16.10,API6DFlange Dimension --- ANSI 16.5Butt ... ,Enhanced,Graphite ,SFB/260,PTFEWorking Temperature --- ≤200 oC - ≤450 oCSuitable Medium --- Water,Steam,Peroleum Propoducts,Nitric acid,Acetic acid,Urea gate valve