... Forged,Casting6. Standard: ASTM,ASME,GB,DIN,EN,JIS, etc7. Grade: 304,304L,316,316L,317, 317l ,321,309S,310S8. Application ... range: it is used in petroleum/ chemical industry/power/ship building/paper making/metallurgy/ construction ... If you are interested in any of our products, please feel free to contact us for more information.Contact: 310 stainless steel flange