Welding Neck Flanges

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 Class 150 WN BS 3293 Class 300 WN BS 3293 Class 600 WN DIN 2631 PN 6 DIN 2632 PN 10 DIN 2633 PN 16 DIN 2634 PN 25 DIN 2635 PN40 Usage: Flanges are integral parts of many engineering and plumbing projects. In many applications, engineers need to find a way to close off a chamber or cylinder in a very secure fashion, usually because the substance inside must differ from the substance outside in composition or pressure.

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