how to change the pressure in a junciton water cad

In case of network of pipes having many loops, the system must be divided into two or more loops, such that each pipe in the network is included in the circuit of one loop. The minor losses are usually neglected, although they can be calculated by substituting an equivalent length of pipe.

The value of x is taken 1.85 (as per Hazen Williams formula) in this method known as Hardy Cross Method. As a common practice + ve sign is given to the head losses in clockwise direction and – ve signs to those in the anti-clockwise direction. In this equation the numerator is obtained by the algebraic sum of the head losses in the various pipes of the closed loop. If the head loss in the pipe under reference is H t, it can be determined by the formula Now if Q a be the assumed flow in a pipe and Q be the actual flow in that pipe, then correction will be given by the relation The successive corrections are made in the flows in each pipe until the heads are balanced and the principle of continuity is satisfied at each junction. The head loss in each pipe is determined by pipe flow formula. In this method, the corrections are applied to the assumed flow in each successive trial. The original part will be renamed using the next name and number combination that is available.The following points highlight the top two methods used for the analysis of flow in a pipe network. Rename Existing Parts: When this option is selected, if a name and number combination is already being used by a pipe network part in the drawing, then that part will be renamed so that the selected part can use that desired name instead.Skip Number: When this option is selected, if a name and number combination is already being used by a pipe network part in the drawing, then the number is incremented until that name umber combination is available as a name for the selected part.These determine how to handle any conflicts with the naming or numbering, if there are any conflicts. Select one of the following Name Conflict Options.You can enter a new starting number or leave this field blank.

You can choose to rename just the selected structures from the sequence of consecutive parts selected, just the pipes, or both. On the Rename Pipe Network Parts dialog box, you may enter or choose a new name (or name template) for the selected pipe network parts.Select the last part in the same pipe network that you want to rename.Note: If you select a pipe or structure that is not connected to another pipe or structure, you can only rename that single part.

How to change the pressure in a junciton water cad