Commonly used P&ID (Piping and Instrumentation Diagram)的符号storage tanks and process vessels or drums. Note that they may differ slightly from one project to another.
| Horizontal Vessel / drum | ![]() |
| Vertical vessel / drum | ![]() |
| Horizontal vessel with boot | ![]() ![]() |
| Conical roof tank | ![]() |
| Conical roof tank with boot | ![]() |
| Floating roof tank | ![]() |
| Spherical storage tank | ![]() |
| Man way | ![]() |
| Vortex breaker | ![]() |















