C950 PLANNING & INSTALLATION MANUAL
13
TP0029 Rev.5
Ó
2000 Ingersoll-Rand Company
Date of Revision: 15 August, 2000
Figure 5
Model Bypass Pipe
Discharge piping from the silencer should be sized so that the maximum backpressure on
the silencer is 5 psi or 35 kPa (a). Standard silencers are equipped with ANSI 150# standard
flanges. Bypass piping to the silencer should be of the same diameter or larger than the
bypass valve. Piping from the bypass silencer should be of the same size or larger than the
silencer discharge. Refer to the certified drawing for complete details of silencer.
The bypass piping should be suitably flanged so that a minimum amount of pipe needs to be
removed during major maintenance. This will reduce maintenance time.
The end of the pipe should be turned down or have a short horizontal run of pipe to prevent
rain and snow from entering the bypass piping. Expanded metal should be installed on the
end of the pipe to prevent large objects and animals from entering the pipe when the
compressor is stopped. To remove condensation from the piping, install a drain in the lowest
part.
Expansion Joints
With proper piping layout and installation, expansion joints may not be required on all
compressors. However, expansion joints are required on:
·
All hot air discharge compressors (no internal aftercooler)
·
All steam turbine drivers – on the inlet and discharge.
Expansion joint installers must consult the manufacturer’s instructions to ensure correct
installation.
Discharge deflector
Roof line
Drain
Alt. side wall discharge
Silencer
Hanger (typ)
Bypass valve
Long radius elbow
Minimum
8 pipe
diameters
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90.10_Pre-Installation and Operation Manual
