December 2016

Environment and Safety

Control design for steam vent noise in refineries

Noise pollution in oil refineries has a direct effect on worker health. Noise is the unwanted or undesirable sound produced by process control equipment, which includes valves.

Noise pollution in oil refineries has a direct effect on worker health. Noise is the unwanted or undesirable sound produced by process control equipment, which includes valves. Sound is produced by fluctuating pressure waves that arise from the flow of fluid through the valve. The specific sources are either mechanical or of fluid structure in nature. These pressure waves are characterized by both amplitude (volume) and frequency. Amplitude is measured in decibels (dB). Industrial noise levels are often expressed in a form that takes into account human sensitivity to frequency. This is known as “A-weighting” and is measured in units called A-weighted decibels (dBA). Many refineries have a s

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