China ANSI B 16.5 JIS B2220 DIN Jpi 7s-15 En1092-1 BS 3293 Slip on Neck Flange Plate Type Flat Welding Flange, Find details about China Slip on Neck Flange, DIN Plate Flange from ANSI B 16.5 JIS B2220 DIN Jpi 7s-15 En1092-1 BS 3293 Slip on Neck Flange Plate Type Flat Welding Flange