... ,timely delivery 3.Had been approved by ASTM 1. Name:304 stainless steel flange2. Type: PL,SO,WN,SW3.Wall Thickness ... ,Casting6. Standard: ASTM,ASME,GB,DIN,EN,JIS, etc7. Grade: 304,304L,316,316L,317, 317l ,321,309S,310S8. Application range ... products, please feel free to contact us for more information. 304 stainless steel flange