Monthly Archives: November 2011

Busy again

I’ve been quiet here lately – passing through another workload crisis, no time to post anything new or respond to comments for the last couple of weeks (apologies to those who have posted comments). ┬áIt’s unlikely to improve until Christmas … Continue reading

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Valve actuation

A criticism of PG&E following the San Bruno failure was their inability to promptly close mainline valves to isolate the gas flow feeding the fire. One of the factors contributing to the delay was the fact that the valves were … Continue reading

Posted in Pipeline design, Risk assessment | 4 Comments