DISTANCE ESTIMATION BETWEEN PIPE SUPPORTS NEAR ROTARY MACHINE BY USING DYNAMIC LOAD FACTOR (DLF)

Abstract

In this study a distance between pipe supports has been determined near a rotary machine (e.g. compressors) depending on the maximum dynamic load factor (????????????????????????.), where it is advisable to keep this value less than (1.5) as a practice. A useful tool that may be used to indicate the effect of dynamic response is the natural frequency of the piping system that excited by a rotary machine. The natural frequencies estimated for piping diameters (3'', 6'', &10'') and specifically STD and XS thickness, taking into account the excitation effects that considered from a rotary machine with fixed – fixed case, so the value of lowest natural frequency (????????) has been utilized with rotary machine run speed (Ω= (3000 RPM) = (50 Hz) = (314.159 rad/sec)) to be substituted in the equation of the dynamic load factor for undamped forced vibration which presented in mathematical model. Furthermore, an effect of ( Ω ???????? ) ratio has been estimated, exhibited and recommended with respect to the (????????????????????????.). A little consideration will show that the given data for the system have been considered to be compliant with pipe specifications and well-known companies practice, so some points have been concluded accordingly.