Liquid pipeline codes generally
stipulate placement of block valves along liquid transmission pipelines
such as on each side of major river crossings where environmental hazards could
cause or are foreseen to potentially cause serious consequences. Codes, however,
do not stipulate any requirement for block valve spacing for low vapor
pressure petroleum transportation, nor for remote pipeline
valve operations to reduce spills. A review of pipeline
codes for valve requirement and spill limitation in high consequence areas is
thus presented along with a criteria for an acceptable spill volume that could
be caused by pipeline leak/full rupture.
A technique for
deciding economically and technically effective pipeline
block valve automation for remote operation to reduce oil
spilled and control of hazards is also provided. In this review, industry
practice is highlighted and application of the criteria for maximum permissible
oil spill and the technique for deciding valve
automation thus developed

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