... to corrosion. 2.Acid and alkali resistant 3.High temperature resistant ansi b16.5 welding neck flange 600 Welding Neck Flanges, Slip ... 20k5.Standard :JIS,EN,DIN,ANSI,ASME ANSI : ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI ... reasonable calculation, smooth surface, acid and alkali-resistant to high temperature, the price reasonable calculation, beautiful appearance, texture performance is ...