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This length is called "equivalent length". This page is giving the equivalent length of some common fittings and valves, it can be especially useful for shortcut calculation during preliminary studies or troubleshooting.
By definition, the equivalent length of a fitting is the length of a similarly-sized straight pipe that would yield the same pressure drop at the same flow rate. In doing piping calculations, the equivalent lengths of all components are added to the total pipe length before using the Hazen-Williams Equation or the Darcy-Weisbach Formula to ...
The equivalent length method (L/D ratio) allows the user to describe the pressure drop through a fitting as a length of pipe. In theory the pressure drop through the fitting is equivalent to the pressure lost through a certain length of piping at that corresponding flow rate.
4 lis 2012 · An efficient and simple way to calculate the pressure loss in a piping system is the "Equivalent Pipe Length Method". 1. Make a Diagram of the Piping System. Make a diagram where the system is structured with nodes as shown below.
The Equivalent Length of a pipe fitting is defined as the length of pipe with the same size as the fitting that would create the same pressure drop as the fitting. Research has shown that the Equivalent Length (L e) is greater for larger fittings of the same type (e.g., long radius elbow).
The pressure loss in fittings is determined using the concept of “equivalent length”. The pressure drop in a fitting is given in terms of the length of straight pipe.
The definition of the Equivalent Length of a pipe fitting is the length of pipe of the same size as the fitting that would give rise to the same pressure drop as the fitting. It has been found experimentally that for a given type of fitting (e.g. a long radius elbow) the Equivalent Length (L e) is larger for larger fittings.
