ANSI B16.5 Class 150 slip-on flange 1.type:WN, SW, SO, BL, RTJ, LJ, THR 2.Material: ... A105, Rst37.2, Stainless steel ANSI B16.5 Class 150 ... slip-on flange ANSI flange1.Pressure: Class 150, 300, 600, 900, 1200, 1500 ... treatment: Rust-preventative oil, Black painted ANSI B16.5 Class 150 slip-on flange