Find us on X on LinkedIn via Email Twitter Linked In Email a link to a colleague Screwed Carbon Steel Flanges are stocked or available in the following range of materials and sizes. ANSI B16.5 FORGED CLASS150, 300, 600, 900, 1500, 2500lb - Material Grades: ASTM A105N, ASTM A350 LF2 ASTM A694 - Sizes: ½” to 4” offered in RF, FF and RTJ finish. BS EN1092 (BS4504) FORGED PN6, 10, 16, 25, 40 - Material Grades: BS.EN 10025 S235JR & ASTM A105N - Sizes: 15mm to 100mm (1/2” to 4”)BS10 2010ed. - Material Grades: ASTM A105N, ASTM A350 LF2 ASTM A694 - Sizes: 15mm to 100mm (½” to 4”) Duplex & Super Duplex Stainless Steel Flanges are also available ANSI B16.11 - Material Grades: ASTM A182 F51 –F55 - Sizes: 15mm to 100mm (1/2” to 4”) offered in RF and RTJ finish.