... 3) Facing: RF / FF / RTJ 4)Material: carbon steel forged Blind flange, carbon steel flange.1)Sizes: DN15 to DN600, 1/2 inch ... On, Weld Neck, Blind, Threaded, special mode.4)Material: Carbon steel: ST37.2, RST37.2, S235JR, C22.8, P250GH, A105 5 ... you to visit our factory and establish long term cooperation. forged casting flange slip blind