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BS EN 1804-3:2020:2021 Edition

BS EN 1804-3:2020:2021 Edition

$189.07

Machines for underground mines. Safety requirements for hydraulic powered roof supports – Hydraulic and electro hydraulic control systems

Published By Publication Date Number of Pages
BSI 2021 46
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This document specifies the safety requirements for hydraulic and electro hydraulic control devices, including hydraulic valves and their control elements, valve combinations, control systems, pipes and hose assemblies, measuring devices, built-in pressure limiting and check valves in legs and rams and, as well emergency stop, start warning, blocking- and control unit when used as specified by the manufacturer or his authorized representative. Excluded are pressure generators, and internal valves of legs and rams (e.g. leg bottom valves, see EN 1804?2:2020).

NOTE

Some components are dealt with in other parts of this standard.

This document applies to hydraulic and electro hydraulic control devices at ambient temperatures from –10 °C to 60 °C.

This document identifies and takes into account:

  1. possible hazards which can be caused by the operation of hydraulic and electro hydraulic control devices;

  2. areas and operating conditions which can create such hazards;

  3. hazardous situations which can cause injury or can be damaging to health;

  4. hazards which can be caused by firedamp and/or combustible dusts.

This document describes methods for the reduction of these hazards.

A list of significant hazards covered appears in Clause 4.

This document does not specify any additional requirements for:

  1. use in particularly corrosive environments;

  2. hazards occurring during construction, transportation, decommissioning;

  3. earthquakes.

A complete hydraulic powered roof support consists of the support units ( EN 1804-1:2020), legs and support rams ( EN 1804-2:2020) and the hydraulic and electro hydraulic controls ( EN 1804?3:2020). Each part of this multipart document addresses the safety requirements of the components mentioned in the scopes of the respective parts of this multipart series.

This document is not applicable to hydraulic and electro hydraulic control systems manufactured before the date of its publication.

PDF Catalog

PDF Pages PDF Title
2 undefined
9 1 Scope
2 Normative references
11 3 Terms and definitions
17 4 Safety requirements
4.1 General requirements
4.1.1 General
4.1.2 Hazard areas
4.1.3 Arrangement of the control devices
4.1.4 Hold-to-run control
4.1.5 Shut-off devices
4.1.6 Pressure indicator
4.1.7 Arrangement of in-shield and inter-shield hose routing
18 4.1.8 Pipe and hose assemblies
4.1.9 Hydraulic fluids
19 4.1.10 Lifting points
4.2 Design requirements
4.2.1 Protection against ejected fluids
4.2.2 Roof contact advance
4.2.3 Pressure limiting
4.2.4 Interruption of the operating pressure
4.2.5 Travel speed
4.2.6 Actuating forces
4.2.7 Resistance to back pressure
4.2.8 Adjustable valves
20 4.3 Requirements of type A valves
4.3.1 General
4.3.2 Leaktightness
4.3.3 Yield pressure
4.3.4 Working pressure
4.3.5 Closing pressure
4.3.6 Pressure pulses
4.3.7 Impact resistance
4.3.8 Pressure flow behaviour
4.3.9 Operating reliability
4.3.10 Temperature effects
4.3.11 Resistance to back pressure
21 4.4 Requirements for type B and C valves
4.4.1 General
4.4.2 Leaktightness
4.4.3 Resistance to pressure
4.4.4 Switching behaviour
4.4.5 Operating reliability
4.4.6 Resistance to back pressure
4.5 Requirements for type D valves
4.6 Materials
4.6.1 Metallic materials
4.6.2 Light metal
4.6.3 Other materials
22 4.6.4 Seals
4.7 General electro hydraulic
4.7.1 General requirements
4.7.2 Arrangement of in-shield and inter-shield cable routing
4.7.3 Electro hydraulic valves
4.7.4 Stroke measurement devices
4.7.5 Pressure indicator
4.7.6 Pressure transducer
4.7.7 Electro hydraulic control unit
4.7.7.1 Safety devices
24 4.7.7.2 Keyboard
4.7.7.3 Adjacent control
4.7.7.4 Unit sequence control
4.7.7.5 Batch sequence control
4.7.7.6 Automatic positive set
25 4.7.7.7 Automated steering of canopy/ balance/ stabilizing cylinder
4.7.7.8 Latching function at spring or gravity loaded cylinder
4.7.7.9 Automatic control of conveyor pull back
5 Verification of the safety requirements
5.1 Type testing
5.2 Additional tests
27 6 User Information
6.1 General requirements
28 6.2 Technical and application data
6.2.1 Introduction
6.2.2 General description
6.2.3 Performance data
6.2.4 Hydraulic data
6.2.5 List of additional drawings and documents
6.3 Handling, transport and storage
6.3.1 Introduction
6.3.2 Handling and transport
29 6.3.3 Storage
6.4 Installation and commissioning
6.4.1 Installation
6.4.2 Commissioning
6.5 Operation
6.6 Maintenance
6.6.1 Introduction
6.6.2 Technical description
6.6.3 Maintenance instructions
30 6.6.4 Fault diagnosis and correction
6.6.5 Preventive maintenance schedules
6.7 Spare parts identification lists
6.8 Marking
6.9 Residual risks
31 Annex A (normative)Test for verification of the safety requirements
A.1 Load tests
A.1.1 General
A.1.2 Lifting points
A.1.3 Testing of type A valves
A.1.3.1 General
A.1.3.2 Leaktightness test
32 A.1.3.3 Testing of the cracking, working and closing pressure at ambient temperature
33 A.1.3.4 Testing of cracking, working and closing pressure of valves with a pressurized volume of gas
A.1.3.5 Hydraulic pulse pressure test
34 A.1.3.6 Impact test
35 A.1.3.7 Testing of the flow-related pressure behaviour
A.1.3.8 Endurance test
A.1.3.9 Resistance to back pressure
A.1.4 Testing of type B valves
A.1.4.1 General
36 A.1.4.2 Leaktightness test
37 A.1.4.3 Pressure test
38 A.1.4.4 Back pressure test
A.1.4.5 Switching test
A.1.4.6 Endurance test
A.1.5 Testing of type C valves
A.1.5.1 General
A.1.5.2 Leaktightness test
A.1.5.3 Pressure test
39 A.1.5.4 Endurance test
A.1.5.5 Back pressure test
A.1.5.6 Switching test
A.1.6 Testing of type D valves
40 Annex B (informative)List of significant hazards
43 Annex ZA (informative)Relationship between this European Standard and the essential requirements of Directive 2006/42/EC aimed to be covered

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$189.07