FORGED FLANGES 150# : 1/2″ to 48″ as per ANSI B 16.5 300# : 1/2″ to 42″ 600# : 1/2″ to 42″ 900# : 1/2″ to 36″ 1500# : 1/2″ to 24″ 2500# :1/2″ to 12″ Dimension PN6, PN10, PN16, PN25, PN40 etc. BS STANDARDS BS 4504, BS10 T – D / E / F / H etc.