Pipeline labeling issue
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For PL-9001-65-F9LI-50R1, what does F9LI-50R1 mean in this pipe designation? Also, what standard is used for such pipe designations, as it differs from HG20519?
In fact, many companies or design firms have their own rules regarding pipeline labeling; the regulations may vary from one design firm or company to another. So it’s best to ask the personnel responsible for creating P&IDs or pipeline diagrams for more information.
You can tell just by looking at the homepage image; each design firm has its own set of rules to follow.
Indeed, the notation styles of each design institute are quite different!