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The piping circuits on the upstream side of, and including, the control valve and any of its isolation block valves shall be designed for pressures resulting from minimum flow conditions (control valve closed or throttled)
The pipeline circulation upstream of the control valve and its isolation valve (including the valves themselves) should be designed for the pressure under minimum flow conditions (with the valve closed or throttled).
Piping circuits (on the upstream side of and including the control valve and any of its isolation block valves) shall be designed for pressures (resulting from minimum flow conditions (closed or throttled control valve)). The blue sentence is the main clause, with the rest serving as modifying elements. The original poster, try again.