ASME B16.47 Series B / API 605 Class 300 WN

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 because of its inherent structural value. It is expensive because of the design.

Norminal Pipe SizeO.D.of Flange, OMin.Thick-ness of WN Flange, tfLenth Through Hub, YDiam. of Hub, XHub Diam. Top, ARaised Fase Diam., RBore (XS)Diam of Bolt CircleNo.of Bolt HolesDiam.of Bolt HoleMin.Fillet Radius, r1Approxi-mate Weight kgs
2686587.4168702665.2737639.8803.33234.914192.17
2892087.4148756716.0787690.6857.23634.914201.54
3099092.1156813768.4845743.0920.83638.114244.39
321055101.6167864819.2902793.8977.93241.316302.35
341110101.6171918870.0953844.61031.93641.316325.93
361170101.6179965920.81010895.41089.03244.516360.30
381220109.61651016971.61060946.21139.03644.516387.36
401275114.319710671022.41114997.01190.64044.516442.44
421335117.520311181074.711681049.31244.63647.616491.16
441385125.521311731125.512191100.11295.44047.616541.07
461460127.022112291176.312701150.91365.23650.816633.78
481510127.022212781227.113271201.71416.04050.816651.27
501560136.623313301277.913781252.51466.84450.816715.51
521615141.324113831328.714291303.31517.64850.816775.24
541675135.023814351379.514801354.11578.04850.816804.16
561765152.426714941430.315371404.91651.03660.3171071.01
581825152.427315481481.115941455.71712.94060.3171137.64
601880149.327015991557.316511531.91763.74060.3171071.78

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Pipe fitting

Pipe fitting
Pipe fitting is work that involves the installation or repair of pipes or tubes. Pipes and tubes are necessary for a wide range of reasons.

Flanges General

Flanges General
A flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system.