This topic covers the design of piping and valves, and their role within a process safety management program. Discussions to do with equipment are provided at this topic page.
The following is a list of the typical piping and valves that are covered by an asset integrity program.
Articles, safety moments and other publications to do with piping and valves are shown below.
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The fluids flowing through many pipelines are two phase, i.e., a mixture of liquid and gas. Ideally the two phases separate out with the liquid at the bottom section of the pipe. The two phases flow together to a processing facility that separates the two phases. In practice, however, the two phases often travel at different rates which means that they can form slugs whereby the composition of the stream at different sections is almost all liquid or almost all vapor.
The material in this safety moment is taken from the book Plant Design and Operations and from the ebook Siting and Layout.
The material provided here is extracted from the ebook 52 Process Safety Moments. .
Safety Moments are short stories or anecdotes that illustrate some aspect of personal or process safety. Generally they feature a near miss or foolish event that had the potential to be much worse than it was. They can be used to start a meeting or a task assignment.
Lockout / tagout systems are routinely used to protect workers when they are working with or close to hazardous systems. They are typically used in conjunction with the other isolation methods. Once a switch or valve is in the correct position it is locked so that it cannot be moved, and a 'Do Not Operate' tag is attached to it. (Valves are often chained in place, with the lock being used to secure the chain such that the valve handle cannot be moved.)
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