Pipe flange

The Welding neck flanges is normally referred to as the high hub flange. It is designed to transfer stresses to the pipe, thereby reducing high stress concentrations at the base of the flange. The welding neck flange is the best designed butt-welded flange of those currently available becuase of its inherent structural value. It is expensive because of the design. Standards, Dimensions & Weight ASME/ANSI B16.5 Class 150 WN ASME/ANSI B16.5 Class 300 WN ASME/ANSI B16.5 Class 600 WN ASME/ANSI B16.5 Class 900 WN ASME/ANSI B16.5 Class 1500 WN ASME/ANSI B16.5 Class 2500 WN ASME B16.47 Series A/MSS SP-44 Class 150 WN ASME B16.47 Series A/MSS SP-44 Class 300 WN ASME B16.47 Series A/MSS SP-44 Class 600 WN ASME B16.47 Series A/MSS SP-44 Class 900 WN ASME B16.47 Series B/API 605 Class 75 WN ASME B16.47 Series B/API 605 Class 150 WN ASME B16.47 Series B/API 605 Class 300 WN ASME B16.47 Series B/API 605 Class 600 WN ASME B16.47 Series B/API 605 Class 900 WN BS 3293 Clas