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At the time of writing, it looks as though BP’s efforts to stop the oil spill in the Gulf of Mexico have succeeded. This is the first really good news since the crisis began on 20 April 2010, when the
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Paul Shillito discusses the benefits of cartridge-style double block and bleed valves in refinery applications. His article also explains how these valves can help to prevent accidents.
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In 1995/6 a BP group-wide work group met to consider various aspects of safety relief valve management and performance. One subject considered was the setting of these valves and, in particular, the u
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Superimposed or built-up back pressure strongly affects the operational characteristics and flow capacity of safety valves.
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In this article, Richard Harvey (Rotork Fluid Systems) explains the increasing scope for critical duty valve testing provided by innovative partial stroke technologies.
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Double-Block and Bleed functionality has been available in ball valves essentially since the development of the trunnionmounted ball valve commonly used today. The phrase “double-block and bleed” has
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