DIN 3840 E : 1982

1 Field of application<br>2 General comments relating to the use of the <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;calculation methods<br>3 Units and symbols<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.1 Units<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.2 Symbols<br>4 Calculation data<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.1 Design pressure<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.2 Test pressure<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.3 Elevated test pressure for type testing of <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;series-manufactured cast iron valves<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.4 Temperature used for calculation<br>5 Wall thickness allowances<br>6 Permissible stress<br>7 Calculation of the valve bodies for mainly static <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;internal pressure stressing<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.1 Required wall thickness<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.2 Calculation of the valve bodies outside the <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;zones of cutaways or branches<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.3 Valve bodies with branch<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.4 Delimitation between the calculation in respect<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;of mainly static internal pressure stressing <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;and the calculation in respect of pulsating <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;stressing<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.5 Additional stresses<br>8 Calculation of the body closures for mainly static <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;internal pressure stressing<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;8.1 Flanges<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;8.2 Dished heads<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;8.3 Plate ends<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;8.4 Flat circular plates and annular plates<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;8.5 Self-sealing closures<br>Standards referred to and other documents<br>Explanatory notes