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ANSI B16.5 forged weld neck flanges product specifications 1.Size:1/2 inch—24 inch,(DN15-600)forged Welding Neck Flange 2.Standard:ANSI B16.5,ASME B16.45,JIS,B2220,DIN2633,ASME,ASTM,JIS,DIN,EN 3...