... 3. ANSI B16.5 carbon steel forged welding neck flanges, (Material A105, Q235) 150LB, 300LB, 400LB ... , SOHFF, SOHRF, BLFF, BLRF, WNRF, WNFF flanges 5. Italy flanges (MaterialRst37.2, S235JRG2, A105) UNI2276, UNI2277, UNI2278 ... , UNI6084, UNI6089, UNI6090, UNI2544, UNI2282, UNI6090, UNI6091, UNI6092, UNI6093 flanges6. EN1092 flange PN6 ...