... AWWA LONGWNAirtight surface type StandardANSI,DIN,EN1092-1,NFE,AS,JIS and customers' drawings for special useTechnologyforged,casting certificateISO9001 ... East Asia,Korea,etc Material316L, 316, 304L, 304,Class150#,300#,400#,600#,900#Production processraw material--cutting--heating--forging--heat ... -45 DaysRemarksAs customers' request DIN 150# S/ 40 300 600 316L Welding Neck WN RF Forged din wnrf Flange ...