Objectives
- Review Different Types of Drawings
- Identify instrumentation on a P&ID, using the symbols from Chapter 12
- Describe a control loop and its function, based on a P&ID layout
Reading
Process Flow
[image 140-14-02] Process Flow diagram
Piping and Instrumentation
[image 140-14-03] Piping and Instrumentation diagram
Symbology
- Review Table 12-1 for how to interpret tag numbers (separate doc)
- Demonstrate clouding to show modifications
- Red-line/green-line
- Look at Alpha Oil D-00-F1000
- Legend, symbol key for set of PIDs
D-1010 Excerpt
[image 140-14-04]
D-1010 Questions
- As level in Vessel rises, how should flowrate at FIC-122 (setpoint) change?
- Will FV-122 be opening or closing as the signal from the FIC increases?
- Is LIC-125 Reverse- or Direct-Acting?
- Is FIC-122 Reverse- or Direct-Acting?
| Component | Data to Fill In: | 0% Range (low end) | Mid-range (setpoint) | 100% range (high end) |
|---|---|---|---|---|
| V-107 Level | Vessel level - lowest setpoint, highest | Lowest | Setpoint | Highest |
| Controller Input, LT-125 output signal | Signal in mA, generally speaking | 4 mA | 12 mA | 20 mA |
| LIC-125 output signal (setpoint to FIC-122) | Setpoint to FIC-122 -- Lowest, middle, highest | Lowest | Middle | Highest |
| FIC-122 output signal to FV-122 "Lowest to Highest" | Overall signal to FV - 122 -- Low, Middle, High | Low | Middle | High |
| Overall FV-122 Valve position - "% open" | Valve position - Closed, Middle, Open | Closed | Middle | Open |