This drawing is a legend or symbols chart providing standard drafting symbols used in P&IDs for SA Water projects. It details symbols for lines, valves, actuators, primary flow elements, and various instruments.
Source: TS-112-Process-and-Instrument-Diagrams.pdf · page 16/27 · Drawing: 4003-00001-01 rev 1 · Components: 87 (1 equipment, 19 instrument, 39 valve, 15 line, 13 other)
| Tag | Description | Details | Connects to |
|---|---|---|---|
| pump-variable-speed | PUMP DRIVEN BY A VARIABLE SPEED MOTOR | SIC XXX, M | — |
| Tag | Function (ISA 5.1) | Description | Details | Connects to |
|---|---|---|---|---|
| plot-light | — | PLOT LIGHT | — | — |
| pressure-setting-balloon-right | — | PRESSURE SETTING BALLOON (RIGHT) | — | — |
| pressure-setting-balloon-left | — | PRESSURE SETTING BALLOON (LEFT) | — | — |
| undefined-interlock | — | UNDEFINED INTERLOCK LOGIC | — | — |
| LE-ultrasonic | LE = Level Element | ULTRASONIC LEVEL SENSOR | — | — |
| LE-conductivity | LE = Level Element | CONDUCTIVITY PROBE LEVEL SENSOR | — | — |
| LE-ball-float | LE = Level Element | BALL FLOAT LEVEL SENSOR | — | — |
| flow-element-orifice | — | FLOW ELEMENT, ORIFICE TYPE | — | — |
| flow-element-flume | — | FLUME | — | — |
| FE-code-balloon | FE = Flow Element | FLOW ELEMENT CODE BALLOON | To be associated with Element | — |
| flow-magnetic | — | MAGNETIC FLOWMETER | M | — |
| flow-pitot | — | PITOT TUBE OR ANNUBAR | J | — |
| flow-positive-displacement | — | POSITIVE DISPLACEMENT FLOWMETER | — | — |
| flow-thermal-mass | — | THERMAL MASS FLOWMETER | T | — |
| flow-turbine | — | TURBINE FLOWMETER | X | — |
| flow-ultrasonic | — | ULTRASONIC FLOWMETER | S | — |
| flow-variable-area | — | VARIABLE AREA FLOW INDICATOR | — | — |
| flow-vortex | — | VORTEX METER | V | — |
| flow-weir | — | WEIR | — | — |
| Tag | Description | Details | Connects to |
|---|---|---|---|
| PSV-globe-prv | GLOBE DIAPHRAGM TYPE PRESSURE SUSTAINING VALVE | — | — |
| PCV-globe-prv | GLOBE DIAPHRAGM TYPE PRESSURE REGULATING VALVE | — | — |
| PRV-globe-relief | GLOBE DIAPHRAGM TYPE PRESSURE RELIEF VALVE | — | — |
| PSV-spring-relief | SPRING ACTUATED PRESSURE RELIEF VALVE | — | — |
| PSV-spring-relief-90 | SPRING ACTUATED 90 DEG PRESSURE RELIEF VALVE | — | — |
| HOCV-valve | HOCV | ...kPa | — |
| HOSV-valve | HOSV | ...kPa, ...kPa | — |
| actuator-diaphragm | DIAPHRAGM ACTUATOR | — | — |
| actuator-diaphragm-pressure-balanced | DIAPHRAGM PRESSURE BALANCED ACTUATOR | — | — |
| actuator-float | FLOAT ACTUATOR | — | — |
| actuator-hand | HAND ACTUATED OR HANDWHEEL | — | — |
| actuator-piston | PISTON ACTUATOR | — | — |
| actuator-piston-positioner | PISTON ACTUATOR WITH POSITIONER OR POSITION SWITCHES | — | — |
| actuator-positioner-on-actuator | POSITIONER SHOWN ON ACTUATOR | — | — |
| actuator-positioner-tag | POSITIONER TAG | — | — |
| actuator-rotary-motor | ROTARY MOTOR ACTUATOR | MAY BE ELECTRIC HYDRAULIC OR PNEUMATIC | — |
| actuator-solenoid | SOLENOID ACTUATOR | — | — |
| actuator-spring | SPRING ACTUATOR FOR PRESSURE RELIEF OR SAFETY VALVE ONLY | — | — |
| actuator-weight | WEIGHT ACTUATOR | — | — |
| valve-angle | ANGLE VALVE | — | — |
| valve-ball | BALL VALVE | — | — |
| valve-butterfly | BUTTERFLY VALVE | — | — |
| valve-diaphragm | DIAPHRAGM VALVE | — | — |
| valve-fire-plug | FIRE PLUG VALVE | — | — |
| valve-gas-release | GAS RELEASE VALVE | — | — |
| valve-gate | GATE VALVE | — | — |
| valve-general | GENERAL VALVE | — | — |
| valve-globe | GLOBE VALVE | — | — |
| hydrant | HYDRANT | H | — |
| valve-knife-gate | KNIFE GATE VALVE | — | — |
| valve-needle | NEEDLE VALVE | — | — |
| valve-non-return | NON RETURN VALVE | — | — |
| valve-backflow-prevention | BACKFLOW PREVENTION DEVICE | — | — |
| penstock | PENSTOCK | — | — |
| valve-pinch | PINCH VALVE | — | — |
| valve-plug | PLUG VALVE | — | — |
| stop-plate | STOP PLATE | — | — |
| stoplog | STOPLOG | — | — |
| valve-3-way | 3 WAY VALVE | — | — |
| Tag | Description | Details | Connects to |
|---|---|---|---|
| main-process-line | MAIN PROCESS LINES | — | — |
| secondary-process-line | SECONDARY PROCESS LINE | — | — |
| covered-channel | COVERED CHANNEL | — | — |
| open-channel | OPEN CHANNEL | — | — |
| instrument-supply | INSTRUMENT SUPPLY OR CONNECTION TO PROCESS | — | — |
| undefined-signal | UNDEFINED SIGNAL | — | — |
| pneumatic-signal | PNEUMATIC SIGNAL | — | — |
| electrical-signal | ELECTRICAL SIGNAL | — | — |
| electrical-signal-digital | ELECTRICAL SIGNAL (DIGITAL) | — | — |
| software-link | SOFTWARE LINK | — | — |
| termination-point | TERMINATION POINT | EXISTING / NEW | — |
| in-left-out-right | IN LEFT/OUT RIGHT | — | — |
| out-left-in-right | OUT LEFT/IN RIGHT | — | — |
| liquid-flow-arrow | LIQUID FLOW ARROW | — | — |
| connection-of-lines | CONNECTION (OF LINES) | — | — |
| Tag | Description | Details | Connects to |
|---|---|---|---|
| fitting-cap | CAP | — | — |
| fitting-blind-flange | BLIND FLANGE | — | — |
| fitting-flange-joint | FLANGE JOINT | — | — |
| fitting-flexible-coupling | FLEXIBLE COUPLING | — | — |
| fitting-flexible-hose | FLEXIBLE HOSE | — | — |
| fitting-hose-coupling | HOSE COUPLING | — | — |
| fitting-nozzle | NOZZLE | — | — |
| fitting-reducer-concentric | REDUCER CONCENTRIC | — | — |
| fitting-reducer-flat-bottom | REDUCER FLAT BOTTOM | — | — |
| fitting-reducer-flat-top | REDUCER FLAT TOP | — | — |
| haz-average | HAZ LEVEL B (AVERAGE) | eg. CHLORINE, CAUSTIC | — |
| haz-low | HAZ LEVEL C (LOW) | eg. POLYMER, HIGH PRESSURE | — |
| haz-negligible | HAZ LEVEL E (NEGLIGIBLE) | eg. WATER | — |