Ia anyone aware of a P&ID symbol for an internal fire safety valve, like the Protectoseal 3000 or Morrison Figure 272? It is a normally-open spring-loaded valve with a fusible link that holds it open. Installed on a nozzle at bottom of flammable material AST. Haven't found anything applicable...
As a consulting engineer, I have P&ID's from a variety of large companies and they all have different formatting preferences. Choose a standard for labeling the instrument bubbles, but after that you're on your own. A lot depends on how much information you choose to "cram" into an individual...
