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AS 2671:2021

[Current]

Hydraulic fluid power — General rules and safety requirements for systems and their components (ISO 4413:2010, MOD)

Adopts ISO 4413:2010 with modifications for Australia, which specifies general rules and safety requirements for hydraulic fluid power systems and components used on machinery. It deals with all significant hazards associated with hydraulic fluid power systems and specifies the principles to apply in order to avoid those hazards when the systems are put to their intended use. KEYWORDS: hydraulic fluid power general safety

Published: 29/01/2021

Pages: 46

Table of contents

Cited references

Content history

Table of contents

Header

About this publication

Preface

Foreword

Introduction

1 Scope

2 Normative references

3 Terms and definitions

4 List of significant hazards

5 General rules and safety requirements

5.1 General

5.1.1

5.1.2

5.1.3

5.2 Basic requirements for the design and specification of hydraulic systems

5.2.1 Selection of components and piping

5.2.1.1

5.2.1.2

5.2.1.3

5.2.2 Unintended pressures

5.2.2.1

5.2.2.2

5.2.2.3

5.2.2.4

5.2.2.5

5.2.3 Mechanical movements

5.2.4 Noise

5.2.5 Leakage

5.2.6 Temperature

5.2.6.1 Operating temperature

5.2.6.2 Surface temperature

5.2.7 Operational and functional requirements for hydraulic systems

5.3 Additional requirements

5.3.1 Site conditions and operating environment

5.3.2 Installation, use and maintenance of components, piping and assemblies

5.3.2.1 Replacement

5.3.2.2 Maintenance requirements

5.3.2.3 Lifting provisions

5.3.2.4 Installation

5.3.2.5 Use of standard parts

5.3.2.5.1

5.3.2.5.2

5.3.2.6 Seals and sealing devices

5.3.2.6.1 Materials

5.3.2.6.2 Replacement

5.3.3 Cleaning and painting

5.3.3.1

5.3.3.2

5.3.4 Preparation for transportation

5.3.4.1 Identification of piping

5.3.4.2 Packaging

5.3.4.3 Sealing and protection of openings

5.3.4.4 Handling facilities

5.4 Specific requirements for components and controls

5.4.1 Pumps and motors

5.4.1.1 Mounting

5.4.1.2 Couplings and mountings

5.4.1.2.1

5.4.1.2.2

5.4.1.3 Rotational speed

5.4.1.4 Drains, air bleeds and auxiliary ports

5.4.1.5 Pre-filling of housings

5.4.1.6 Working pressure range

5.4.1.7 Installation

5.4.2 Cylinders

5.4.2.1 Resistance to buckling

5.4.2.2 Dimensioning

5.4.2.3 Mounting ratings

5.4.2.4 Loading by position stop

5.4.2.5 Resistance to shock and vibration

5.4.2.6 Unintended pressure intensifications

5.4.2.7 Mounting and alignment

5.4.2.8 Mounting location

5.4.2.9 Mounting fasteners

5.4.2.10 Cushions and deceleration devices

5.4.2.11 Adjustable stroke end stops

5.4.2.12 Piston stroke

5.4.2.13 Piston rods

5.4.2.13.1 Material, finish and protection

5.4.2.13.2 Assembly

5.4.2.14 Maintenance of sealing devices and wear parts

5.4.2.15 Air bleeding

5.4.2.15.1 Location of air bleeds

5.4.2.15.2 Air vent ports

5.4.3 Gas-loaded accumulators

5.4.3.1 Information

5.4.3.1.1 Information that is permanently marked on accumulators

5.4.3.1.2 Information that is given on, or on a label attached to, accumulators

5.4.3.2 Requirements for hydraulic systems with gas-loaded accumulators

5.4.3.3 Installation

5.4.3.3.1 Mounting position

5.4.3.3.2 Support

5.4.3.3.3 Unauthorized alterations

5.4.3.4 Discharge rate

5.4.4 Valves

5.4.4.1 Selection

5.4.4.2 Mounting

5.4.4.3 Manifolds

5.4.4.3.1 Surface finish and flatness

5.4.4.3.2 Distortion

5.4.4.3.3 Mounting

5.4.4.3.4 Internal passages

5.4.4.3.5 Identification

5.4.4.4 Electrically operated valves

5.4.4.4.1 Electrical connections and solenoids

5.4.4.4.1.1 Electrical connections

5.4.4.4.1.2 Solenoids

5.4.4.4.1.3 Manual or other overrides

5.4.4.5 Adjustments

5.4.5 Fluids and conditioning components

5.4.5.1 Fluids

5.4.5.1.1 Specification

5.4.5.1.1.1

5.4.5.1.1.2

5.4.5.1.1.3

5.4.5.1.2 Compatibility

5.4.5.1.3 Cleanliness level of fluids

5.4.5.2 Reservoirs

5.4.5.2.1 Design

5.4.5.2.2 Construction

5.4.5.2.2.1 Spillage

5.4.5.2.2.2 Vibration and noise

5.4.5.2.2.3 Top

5.4.5.2.2.4 Configuration

5.4.5.2.2.5 Maintenance

5.4.5.2.2.6 Integrity

5.4.5.2.2.7 Corrosion protection

5.4.5.2.2.8 Equipotential bonding

5.4.5.2.3 Accessories

5.4.5.2.3.1 Sight glasses and fluid-level sensors

5.4.5.2.3.2 Filling points

5.4.5.2.3.3 Air intake

5.4.5.2.3.4 Water separators

5.4.5.3 Filtration and fluid conditioning

5.4.5.3.1 Filtration

5.4.5.3.2 Location and sizing of filters

5.4.5.3.2.1 Location

5.4.5.3.2.2 Maintenance

5.4.5.3.2.3 Accessibility

5.4.5.3.2.4 Sizing

5.4.5.3.2.5 Differential pressure

5.4.5.3.3 Suction lines

5.4.5.4 Heat exchangers

5.4.5.4.1 Application

5.4.5.4.2 Liquid-to-liquid heat exchangers

5.4.5.4.2.1 Application

5.4.5.4.2.2 Thermal controls on stationary industrial machinery

5.4.5.4.2.3 Cooling medium

5.4.5.4.2.4 Drain

5.4.5.4.2.5 Temperature measuring points

5.4.5.4.3 Liquid-to-air heat exchangers

5.4.5.4.3.1 Application

5.4.5.4.3.2 Air supply

5.4.5.4.3.3 Air exhaust

5.4.5.5 Heaters

5.4.5.5.1

5.4.5.5.2

5.4.6 Piping

5.4.6.1 General requirements

5.4.6.1.1 Dimensioning

5.4.6.1.2 Use of connections

5.4.6.1.3 Piping layout

5.4.6.1.3.1

5.4.6.1.3.2

5.4.6.1.3.3

5.4.6.1.3.4

5.4.6.1.4 Piping mounting and identification

5.4.6.1.5 Connector sealing

5.4.6.1.6 Pressure rating of connectors

5.4.6.2 Tube requirements

5.4.6.3 Support of tubes

5.4.6.3.1

5.4.6.3.2

5.4.6.3.3

5.4.6.3.4

5.4.6.4 Foreign matter

5.4.6.5 Hose assemblies

5.4.6.5.1 General requirements

5.4.6.5.2 Installation

5.4.6.5.3 Protection against failure

5.4.6.5.3.1

5.4.6.5.3.2

5.4.6.6 Quick-action couplings

5.4.6.6.1

5.4.6.6.2

5.4.7 Control systems

5.4.7.1 Unintended movement

5.4.7.2 System protection

5.4.7.2.1 Unexpected start-up

5.4.7.2.2 Control or energy supply

5.4.7.2.3 Internal fluid drainage

5.4.7.3 Control system components

5.4.7.3.1 Adjustable control mechanisms

5.4.7.3.2 Stability

5.4.7.3.3 Tamper resistance

5.4.7.3.3.1

5.4.7.3.3.2

5.4.7.3.4 Manual control levers

5.4.7.3.5 Manual set-up controls

5.4.7.3.6 Two-hand controls

5.4.7.3.7 Safe position

5.4.7.4 Control systems in open- and closed-loop control circuits

5.4.7.4.1 Override systems

5.4.7.4.2 Additional devices

5.4.7.4.3 Filters

5.4.7.4.4 Flushing of the system

5.4.7.5 Other design considerations

5.4.7.5.1 Monitoring of system parameters

5.4.7.5.2 Test points

5.4.7.5.3 System interactions

5.4.7.5.4 Control of multiple devices

5.4.7.5.5 Control of sequencing by position sensing

5.4.7.6 Location of controls

5.4.7.6.1 Protection

5.4.7.6.2 Accessibility

5.4.7.6.3 Manual controls

5.4.7.7 Emergency stop devices for stationary industrial machinery

5.4.7.7.1 General

5.4.7.7.1.1

5.4.7.7.1.2

5.4.7.7.2 Features of emergency stop devices

5.4.7.7.3 System restart after emergency stop

5.4.8 Diagnostics and monitoring

5.4.8.1 General requirements

5.4.8.2 Pressure measurement and verification

5.4.8.3 Fluid sampling

5.4.8.4 Temperature sensing

5.4.8.5 Contamination control

6 Verification of safety requirements and acceptance testing

7 Information for use

7.1 General requirements

7.2 Final information for systems on stationary industrial machinery

7.3 Maintenance and operating data

7.3.1 General data

7.3.1.1

7.3.1.2

7.3.2 Requirements for systems with gas-loaded accumulators

7.3.2.1 Warning label

7.3.2.1.1

7.3.2.1.2

7.3.2.1.3

7.3.2.2 Maintenance information

7.3.3 Requirements for safety related parts of control systems

7.4 Marking and identification

7.4.1 Components

7.4.1.1

7.4.1.2

7.4.2 Components and hose assemblies within a system

7.4.2.1

7.4.2.2

7.4.3 Ports and conductors

7.4.3.1

7.4.3.2

7.4.4 Valve-control mechanisms

7.4.4.1

7.4.4.2

7.4.5 Internal devices

7.4.6 Function plate

7.4.7 Direction of pump and motor shaft rotation

8 Identification statement (reference to this International Standard)

Annex A

Annex B

B.1 General requirements

B.1.1 Description of equipment

B.1.2 Commissioning

B.1.3 Names and contact information of parties involved

B.1.4 Applicable standards, codes and laws (in addition toISO 4413)

B.1.5 Site or operating environment conditions; see 5.3.1

B.1.6 System requirements; see 5.2.7

B.2 Component requirements

B.2.1 Pumps; see 5.4.1

B.2.2 Motors; see 5.4.1

B.2.3 Cylinders; see 5.4.2

B.2.4 Rotary actuators; see 5.4.2

B.2.5 Accumulators; see 5.4.3

B.2.6 Valve subassemblies or valve manifold assemblies; see 5.4.4

B.2.7 Directional control valves; see 5.4.4

B.2.8 Proportional valves and/or servovalves; see 5.4.4

B.2.9 Flow control valves; see 5.4.4

B.2.10 Pressure control valves; see 5.4.4

B.2.11 Filters and inlet strainers; see 5.4.5

B.2.12 Pressure gauges and pressure switches; see 5.4.8

B.2.13 Heat exchangers and heaters; see 5.4.5

B.2.14 Piping for use at pressures equal to or greater than 7 MPa (70 bar); see 5.4.6

B.2.15 Piping for use at pressures less than 7 MPa (70 bar); see 5.4.6

B.2.16 Reservoirs; see 5.4.5

B.2.17 Accessories

B.2.18 Other components

Bibliography

Appendix ZZ

ZZ.1 Scope

ZZ.2 Variations

Cited references in this standard

Content history

ISO 4413:2010

[Current]

AS 2671-2002

[Superseded]

DR AS 2671:2020

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