What are the options for disposing discharge fluid of a thermal relief valve in a piping system between production units and and storage tank farm? Ideally the TRV discharge piping should be connected to the other side of the block valve where it is free from blockage. But in case it requires a relative long piping to find such a spot for discharge connection, is it better to connect to a nearby closed drain? Is it permissible to have an open discharge if it is a non-toxic hydrocarbon fluid?
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