---
title: "PROCESS AND INSTRUMENTATION DIAGRAMS STANDARD DRAFTING SYMBOLS CHART SA WATER STANDARDS — asset register"
doc_type: pid-asset-register
drawing_number: "4003-00001-01"
revision: "1"
source: "TS-112-Process-and-Instrument-Diagrams.pdf (page 16 of 27)"
tags: [main-process-line, secondary-process-line, covered-channel, open-channel, instrument-supply, undefined-signal, pneumatic-signal, electrical-signal, electrical-signal-digital, software-link, termination-point, in-left-out-right, out-left-in-right, liquid-flow-arrow, connection-of-lines, cap, blind-flange, flange-joint, flexible-coupling, flexible-hose]
summary: "This document is a standard drafting symbols chart for SA Water Process and Instrumentation Diagrams. It provides a legend for line types, symbols, self-actuated regulating valves, actuators, piping valves, fittings, general instrument functions, primary element flow rates, level sensors, and piping hazardous classification levels."
---

# PROCESS AND INSTRUMENTATION DIAGRAMS STANDARD DRAFTING SYMBOLS CHART SA WATER STANDARDS

This document is a standard drafting symbols chart for SA Water Process and Instrumentation Diagrams. It provides a legend for line types, symbols, self-actuated regulating valves, actuators, piping valves, fittings, general instrument functions, primary element flow rates, level sensors, and piping hazardous classification levels.

**Source:** TS-112-Process-and-Instrument-Diagrams.pdf · page 16/27 · **Drawing:** 4003-00001-01 rev 1 · **Components:** 87 (11 equipment, 18 instrument, 39 valve, 10 line, 9 other)

## Equipment (11)

| Tag | Description | Details | Connects to |
|---|---|---|---|
| cap | CAP | — | — |
| blind-flange | BLIND FLANGE | — | — |
| flange-joint | FLANGE JOINT | — | — |
| flexible-coupling | FLEXIBLE COUPLING | — | — |
| flexible-hose | FLEXIBLE HOSE | — | — |
| hose-coupling | HOSE COUPLING | — | — |
| nozzle | NOZZLE | — | — |
| reducer-concentric | REDUCER _ CONCENTRIC | — | — |
| reducer-flat-bottom | REDUCER _ FLAT BOTTOM | — | — |
| reducer-flat-top | REDUCER _ FLAT TOP | — | — |
| pump-driven-by-a-variable-speed-motor | PUMP DRIVEN BY A VARIABLE SPEED MOTOR | M / SIC XXX | — |

## Instruments (18)

| Tag | Function (ISA 5.1) | Description | Details | Connects to |
|---|---|---|---|---|
| pilot-light | — | PILOT LIGHT | — | — |
| pressure-setting-balloon-right | — | PRESSURE SETTING BALLOON (RIGHT) | XXX | — |
| pressure-setting-balloon-left | — | PRESSURE SETTING BALLOON (LEFT) | XXX | — |
| utrasonic | LE XXXX | UTRASONIC | LE XXXX | — |
| conductivity-probe | LE XXXX | CONDUCTIVITY PROBE | LE XXXX | — |
| ball-float | LE XXXX | BALL FLOAT | LE XXXX | — |
| flow-element-orifice-type | — | FLOW ELEMENT, ORIFICE TYPE | — | — |
| flume | — | FLUME | — | — |
| flow-element-code-balloon | FE XXXX | FLOW ELEMENT CODE BALLOON (To be associated with Element) | FE XXXX | — |
| magnetic-flowmeter | — | MAGNETIC FLOWMETER | M | — |
| pitot-tube-or-annubar | — | PITOT TUBE or ANNUBAR | J | — |
| positive-displacement-flowmeter | — | POSITIVE DISPLACEMENT FLOWMETER | — | — |
| thermal-mass-flowmeter | — | THERMAL MASS FLOWMETER | T | — |
| turbine-flowmeter | — | TURBINE FLOWMETER | — | — |
| ultrasonic-flowmeter | — | ULTRASONIC FLOWMETER | — | — |
| variable-area-flow-indicator | — | VARIABLE AREA FLOW INDICATOR | — | — |
| vortex-meter | — | VORTEX METER | — | — |
| weir | — | WEIR | — | — |

## Valves (39)

| Tag | Description | Details | Connects to |
|---|---|---|---|
| globe-diaphragm-type-pressure-sustaining-valve | GLOBE DIAPHRAGM TYPE PRESSURE SUSTAINING VALVE | — | — |
| globe-diaphragm-type-pressure-regulating-valve | GLOBE DIAPHRAGM TYPE PRESSURE REGULATING VALVE | — | — |
| globe-diaphragm-type-pressure-relief-valve | GLOBE, DIAPHRAGM TYPE PRESSURE RELIEF VALVE | — | — |
| spring-actuated-pressure-relief-valve | SPRING ACTUATEDPRESSURE RELIEF VALVE | — | — |
| spring-actuated-90-pressure-relief-valve | SPRING ACTUATED 90° PRESSURE RELIEF VALVE | — | — |
| hocv | HOCV | ...kPa / ...kPa | — |
| hosv | HOSV | ...kPa / ...kPa | — |
| diaphragm | DIAPHRAGM | — | — |
| diaphragm-pressure-balanced | DIAPHRAGM PRESSURE BALANCED | — | — |
| float | FLOAT | — | — |
| hand-actuated-or-handwheel | HAND ACTUATED OR HANDWHEEL | — | — |
| piston | PISTON | — | — |
| piston-actuator-with-positioner-or-position-switches | PISTON ACTUATOR WITH POSITIONER OR POSITION SWITCHES | — | — |
| positioner-shown-on-actuator | POSITIONER SHOWN ON ACTUATOR. | — | — |
| positioner-tag | POSITIONER TAG | — | — |
| rotary-motor | ROTARY MOTOR (MAY BE ELECTRIC HYDRAULIC or PNEUMATIC) | — | — |
| solenoid | SOLENOID | — | — |
| spring-for-pressure-relief-or-safety-valve-only | SPRING - FOR PRESSURE RELIEF OR SAFETY VALVE ONLY | — | — |
| weight | WEIGHT | — | — |
| valve-angle | VALVE, ANGLE | — | — |
| valve-ball | VALVE, BALL | — | — |
| valve-butterfly | VALVE, BUTTERFLY | — | — |
| valve-diaphragm | VALVE, DIAPHRAGM | — | — |
| valve-fire-plug | VALVE, FIRE PLUG | — | — |
| valve-gas-release | VALVE, GAS RELEASE | — | — |
| valve-gate | VALVE, GATE | — | — |
| valve-general | VALVE, GENERAL | — | — |
| valve-globe | VALVE, GLOBE | — | — |
| hydrant | HYDRANT | H | — |
| valve-knife-gate | VALVE, KNIFE GATE | — | — |
| valve-needle | VALVE, NEEDLE | — | — |
| valve-non-return | VALVE, NON RETURN | — | — |
| valve-backflow-prevention-device | VALVE, BACKFLOW PREVENTION DEVICE | — | — |
| penstock | PENSTOCK | — | — |
| valve-pinch | VALVE, PINCH | — | — |
| valve-plug | VALVE, PLUG | — | — |
| stop-plate | STOP PLATE | — | — |
| stoplog | STOPLOG | — | — |
| valve-3-way | VALVE, 3 WAY | — | — |

## Lines (10)

| 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 | — | — |

## Other (9)

| Tag | Description | Details | Connects to |
|---|---|---|---|
| termination-point | TERMINATION POINT | EXISTING / NEW | — |
| in-left-out-right | IN LEFT/OUT RIGHT | XXXX | — |
| out-left-in-right | OUT LEFT/IN RIGHT | XXXX | — |
| liquid-flow-arrow | LIQUID FLOW ARROW | — | — |
| connection-of-lines | CONNECTION (OF LINES) | — | — |
| undefined-interlock-logic | UNDEFINED INTERLOCK LOGIC | I | — |
| haz-level-a | HAZ LEVEL | (AVERAGE) / eg. CHLORINE, CAUSTIC | — |
| haz-level-b | HAZ LEVEL | (LOW) / eg. POLYMER, HIGH PRESSURE | — |
| haz-level-c | HAZ LEVEL | (NEGLIGIBLE) / eg. WATER | — |

## Notes on drawing

- NOTE: THIS DRAWING SHOWS THE STANDARD SYMBOLS TO BE USED WHEN PRODUCING P & ID's FOR SA WATER AND ON ALL SA WATER PROJECTS. REFER TO TS112
- PIPING HAZARDOUS CLASSIFICATION LEVELS TO AS4343