Piping stenciling with P&ID numbers
Piping stenciling with P&ID numbers
(OP)
From a process safety perspective, how important it is to have the piping tag number stencilled on the piping external surface in a process plant?
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Piping stenciling with P&ID numbers
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RE: Piping stenciling with P&ID numbers
Do you really mean the Line Number?
If you do mean the Line Number then you would need to justify the cost of putting the Line Number on each line.
The cost would require; a serious study of where to put the number; how many times the number would be required on each line; the method of application; the validation of the correctness of each number-to-line; and the long term maintenance of the numbers.
Sometimes its possible to do all the right things and still get bad results
RE: Piping stenciling with P&ID numbers
RE: Piping stenciling with P&ID numbers
As some cost of adding the line ID on the pipes, it can be useful for the safety O&M activities and any future engineering work, especially for a complicate unit with multiple process piping. Many safety incidents occurred as the wrong pipes were marked for the maintenance work.
You can order the pipe ID labels and wrap or stick it on the pipes.
RE: Piping stenciling with P&ID numbers
In any case, lines should be walked down from source to destination to confirm that real world matches the documentation prior to any work being started.
Yes, it can be a pain/difficult to do this but failure to do this can cause large problems down the road.
RE: Piping stenciling with P&ID numbers
RE: Piping stenciling with P&ID numbers
Can't say I've even seen this in practice and dubious about it's benefit, if any, on process safety.
Making sure each valve and instrument is correctly tagged is an ongoing issue in many plants - Tags get lost, damaged, valves and instruments replaced or moved, but never re-tagged. This is far more important than the line number.
Why do you ask?
what's your view?
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Piping stenciling with P&ID numbers
Here is how it looks like in real life:
RE: Piping stenciling with P&ID numbers
I see no use for it. As mentioned above, ANSI A13.1 is the way to go.
I design aqueducts in a parallel universe.
RE: Piping stenciling with P&ID numbers
P&ID Diagram Basics
Thank you!
RE: Piping stenciling with P&ID numbers
ASME A13.1 was updated in 2007 and reaffirmed in 2013. It uses a color code chart with six standard color combinations and four user-defined combinations as shown below. The colors are based on the contents of the pipe and in general, the most hazardous feature of the contents is used to determine the colors used.
Have never seen process plants with labeling consisting of P&ID numbers.
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