... , Ring Joint Flanges, Long Welding Neck Flanges, Figure 8 BlanksPRESSURE GRADE: Class150,Class300,Class600,Class900,Class1500,Class2500SIZE: 1/2" NB TO ... 48" NB 2.DIN FLANGESStandard: DIN2527,DIN2566,DIN2573,DIN2576,DIN2641 ... and alloy steel flanges standard: ANSI, JIS, BS, DIN, EN,GBsize: 15mm to 3000mm pressure:75bls to 2500bls ...