ansi b16.5 welding neck flange 600 1.Resistance to corrosion. 2.Acid and ... 3.High temperature resistant ansi b16.5 welding neck flange 600 Welding Neck Flanges, Slip on Flanges, Threaded Flanges, ... ,cast iron ,brass , aluminum 3.class 150 300 600 900 1500 25004. pressure grade:PN2.5 PN 6 PN10 ... (15 NB) to 64” (1200NB) in 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS ASA 150, ASA 300, PN 2.5 ,6 ...