【2026 Typical Equipment】Examples of P&ID drawing for typical pumps
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1. The equipment markings must be drawn on the piping and instrumentation diagram; where necessary, reducers or expansion joints should be used to match the suction side and discharge side of the pump (a top-aligned eccentric reducer should be used at the suction connection).
2. Install permanent filters to prevent damage to the pump
3. Draw the basic process control system for the pump, used for pump flow regulation FC: Flow control. FT: Flow transmitter. FV: Flow control valve. FE: Flow detection element. FO: Fault on.
4 Add pump drive unit control M: Motor. PM: Power monitoring. MCC: Motor Control Center. HS: Manual switch. H/O/A: Manual/Local/Automatic. S/S: Start/stop. S/S command: Start/stop command. Run status: Operating status. Common trouble alarm: General fault alarm. L/R status stop: Local/remote shutdown status. Shutdown command: Command to shut down the system.
5. Install check valves to prevent backflow of the medium
6 A minimum return line should be installed on the discharge pipeline equipped with a control valve, to prevent the flow rate inside the pump from falling below the minimum continuous flow rate, thereby protecting the pump.
7 Displays the pump’s safety instrumented system or alarm system, which is used to protect the pump equipment under abnormal operating conditions (such as a mechanical seal leakage monitoring system).
8 Install a pressure gauge on the discharge side or suction side
9 Install shut-off valves, such as gate valves, on the suction and discharge pipelines to isolate the pump body during maintenance.
10. Consider the exhaust valves and drain valves on the suction side and discharge side casings of the pump body
11. Other details or notes to consider: Ensure that the suction pressure (and temperature) meet the requirements of the operating conditions, which reflects the sensitivity of centrifugal pumps to the net positive suction head. This parameter must be calculated, and its effect can be reflected at the appropriate pipeline number corresponding to the equipment upstream of the pump. Consider installing pipe splices for equipment assembly or disassembly tasks. The insulation layer of the pump body is intended only for personnel protection ； The operating temperature is 40 degrees Celsius, so no additional protective insulation for personnel is required. Define the pump backup configuration: Based on reliability, availability, and maintainability analyses, an additional backup pump with exactly the same specifications will be added to the existing drawings (2 pumps, each handling 100% of the load).