n Risk Management - How to close valves and break flanges : risk trends

Volume 2, Issue 5
  • ISSN : 1817-6585


Extracted from text ... 12 Risk Management JUNE 2006 Valves are vital. We cannot build or run process plants without them. We take them for granted in our hot water systems at home and at work. But valves bring risks. Sometimes they leak, sometimes they stick and do not close, even when we think they are performing as designed. Here is one scenario where I witnessed the aftermath. A tank full of acid with an isolation valve beneath, fed a pump drawing acid. The pump had to be removed for maintenance. The valve had not been closed, as far as anybody could recall, ..

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