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ASME B31.3-2016 <br /> Fig. 304.3.4 Extruded Outlet Header Nomenclature <br /> This Figure illustrates the nomenclature of para. 304.3.4. It does not indicate complete details or a preferred <br /> method of construction. <br /> Limits of Center line <br /> reinforcement of branch <br /> zone <br /> Db <br /> rb <br /> c db <br /> i <br /> GENERAL NOTE: <br /> � I 30 deg max. Taper bore inside Extrusion GENERAL NOTE: <br /> � I diameter taper Sketch to show method of <br /> [if required,see establishing Tx when the <br /> L5 hx x I sketch (d)] x taper encroaches on the <br /> to match branch pipe crotch radius. <br /> II__ 1:3 maximum taper. <br /> Header I Th rh ,`Tx dx— — Tx <br /> Header <br /> Corrosion �"— Extruded outlet <br /> allowance,c JJT 4 <br /> Extruded <br /> outlet (b) <br /> Dh dh <br /> Mill tolerance d2 <br /> (a) <br /> Db Branch pipe <br /> Tb c I�db `I or nozzle <br /> Limits of <br /> rh reinforcement <br /> Thickness,measured zone <br /> or minimum per purchase L5 <br /> specification A3 A3 <br /> �— Extruded outlet <br /> h �x A _A4 <br /> x d <br /> x4 <br /> t Required area <br /> Th rh Tx Al =K (rh)(dx) Header <br /> A2 A2 <br /> Dh dh <br /> c d2 d2 <br /> Mill tolerance <br /> GENERAL NOTE: Sketch is drawn for condition where K= 1.00. <br /> (c) <br />