... to your requirements Material:carbon steel Standard:ANSI,DIN,JIS,GB,etc. Pressure Vessel FlangeFeatures: 1) Materials: carbon and stainless steel 2) ... Standards: ASTM, ASME, AISI, API, UNI, DIN, SIS and EURONORM 3) Seamless ... rolled heat-treated and machined conditions 7) Special design available pressure vessel flange