File name: Pn20 flange dimensions pdf
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Flange thicknesses shown are the greater thickness for that rating. They are not identical but are deemed to comply with the dimensions specified in ANSI B and ANSI B as appropriate (see)Callor visit for your nearest Reece showroom. Due to limitations in the printing process the colours in this brochure are a guide only. BS (Metric) are available as forged, bossed or plate flanges as standard ISO PNand ISO PNgrey cast iron and ductile cast iron flanges are designed to be interchangeable with flanges to ANSI B (grey cast iron) and ANSI B (ductile cast iron). The dimensions and standards described in this guide are provided for information purposes only Flanges are commonly used to connect valves into pipework making it easier for removal and maintenance. There are many common flange standards and flanges within the same standard can etiher be flat (commonly cast iron, ductile iron) or raised face (commonly cast steel and stainless steel) Flange Reference Chart xlsxxxxx IS0 PNand IS0 PNgrey cast iron and ductile cast iron flanges are designed to be interchangeable with flanges to ANSI B (grey cast iron) and ANSI B (ductile cast iron) a large range of industrial valves: Normalization ISO PN,,,, Size of flangesCorri-Servais for industries, high pressure, etc PN*MPNMPNM*When made from cast or ductile iron the OD is mmmm (/2) Standard Class Diameter Bolt Circle Diameter Number of Bolts Bolt Size Diameter of Bolt Hole AS PNMPNMPNMFile Size: KB FigDimensionsASME flange B (seal ledge RF) L Diameter of holes (number of holes) d Seal ledge diameter K Diameter of hole circle D Flange diameter b Total flange thickness f Seal ledge height lb/ lbmm (in) or from lbmm (in) Flanges according to DINENASMEJISTechnical dataDimensions The flanges shall be manufactured according to the following standards except for supplement thereofFlanges DN(NPS ½) to DN (NPS) as per ASME/ANSI BFlanges DN (NPS) to DN (NPS) as per MSS-SPOrifice flanges as per ASME/ANSI Cast iron and bronze flanges are not covered Tables for the Heating & Ventilation Industry – BS Bolt lengths are approximate for flange – flange duty assuming one 1/16” gasket & one bolt washer.
