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Title: Relief Valves
Author: Gary B. Emerson
Source: 1978 International School of Hydrocarbon Measurement
Year Published: 1978
Abstract: There are four types of relief valve upsets which have the same cause. This paper will discuss each, their effect on the operator, and their correction. 1. In 1964 one of oui big 6 by dual 8 valves set at 900 psig rollavod In a romolo pasture near Wilburton, Oklahoma. The farmer called the pipeline and told them he could stand the noise but that it had driven all his cattle up on his front porch and could we please stop the noise so they would go back to the pasture. Noise can be a problem with customers and nowadays can eaily become a legal problem. 2. The relief valve at a gate station destroyed its internals by opening and closing at a rapid rate, tearing up the seats and galling the guiding surfaces. The upset condition probably also tore the guts out of the pressure reducing valve upstream of the relief valve. The operator probably had to go on manual bypass and may have lost the downstream load if the relief valve stuck open.

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