---
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: "01"
source: "TS-112-Process-and-Instrument-Diagrams.pdf (page 16 of 27)"
tags: [PSV-xxx-1, PCV-xxx, PRV-xxx, PSV-xxx-2, LE-xxxx-1, LE-xxxx-2, LE-xxxx-3, SIC-XXX]
summary: "This drawing is a legend/standard drafting symbols chart for SA Water process and instrumentation diagrams. It defines standard line types, self-actuated regulating valves, actuators, piping valves, fittings, general instrument functions, level sensors, and flow rate primary elements."
---

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

This drawing is a legend/standard drafting symbols chart for SA Water process and instrumentation diagrams. It defines standard line types, self-actuated regulating valves, actuators, piping valves, fittings, general instrument functions, level sensors, and flow rate primary elements.

**Source:** TS-112-Process-and-Instrument-Diagrams.pdf · page 16/27 · **Drawing:** 4003-00001-01 rev 01 · **Components:** 8 (1 equipment, 3 instrument, 4 valve)

## Equipment (1)

| Tag | Description | Details | Connects to |
|---|---|---|---|
| SIC-XXX | Pump driven by a variable speed motor | Pump driven by a variable speed motor diagram standard block definition | — |

## Instruments (3)

| Tag | Function (ISA 5.1) | Description | Details | Connects to |
|---|---|---|---|---|
| LE-xxxx-1 | LE = Level Element (Ultrasonic) | Ultrasonic Level Sensor | Ultrasonic level element symbol definition | — |
| LE-xxxx-2 | LE = Level Element (Conductivity Probe) | Conductivity Probe Level Sensor | Conductivity probe level element symbol definition | — |
| LE-xxxx-3 | LE = Level Element (Ball Float) | Ball Float Level Sensor | Ball float level element symbol definition | — |

## Valves (4)

| Tag | Description | Details | Connects to |
|---|---|---|---|
| PSV-xxx-1 | Globe, diaphragm type pressure sustaining valve | Globe, diaphragm type pressure sustaining valve symbol definition | — |
| PCV-xxx | Globe, diaphragm type pressure regulating valve | Globe, diaphragm type pressure regulating valve symbol definition | — |
| PRV-xxx | Globe, diaphragm type pressure relief valve | Globe, diaphragm type pressure relief valve symbol definition | — |
| PSV-xxx-2 | Spring actuated pressure relief valve | Spring actuated pressure relief valve symbol definition | — |

## 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
- DO NOT SCALE PAPER PRINT