Unknown BRITISH STANDARD BS EN 12321 2003 Underground mining machinery — Specification for the safety requirements of armoured face conveyors ICS 73 100 30 ����������� � ��� � ������������������� ����[.]
BRITISH STANDARD Underground mining machinery — Specification for the safety requirements of armoured face conveyors ICS 73.100.30 12&23 50 N; b) 25 mm for operating handles that require a force of < 50 N; c) 10 mm between rows of push buttons or switches; d) 15 mm between separate push buttons; Control devices shall be designed such that intentional human action is needed Control devices shall be so designed, arranged or protected that they cannot be operated accidentally, which could lead to a hazardous situation 5.2 Starting 5.2.1 Pre-start warning The armoured face conveyor shall be provided with audible pre-start warning systems conforming to EN 457 The intention is that the warning shall be provided throughout the intended length of the conveyor (see also clause 0, Introduction, on negotiation) The pre-start warning shall last for a minimum of seconds after which time the machine can start The warning shall continue for a period of a minimum of seconds after power is applied to the drive(s) The requirements of this 5.2.1 need not apply to drive motor(s) dedicated to the chain tensioning devices specified in 5.11.1 5.2.2 Local starting The local operating control panel(s) shall be located at or near the conveyor (see clause 0, Introduction, on negotiation) The local starting operation mode shall provide for the starting of a drive, or any combination of drives, of an armoured face conveyor by a manual operation Starting shall be interlocked with the safety related devices provided for the drives The local starting shall override any remote control 5.2.3 Mode selection Where more than one mode of control is available, i.e local, remote and combination of drives, the mode of control shall be selected at the local control panel Selection of a particular mode shall ensure that starting is only available from the selected point The mode selection switch shall be stable in each position 5.3 Stopping 5.3.1 Normal stopping Each control panel shall be equipped with a switch to switch off all drives and groups of drives of an armoured face conveyor controlled from that control panel The local stopping shall override any remote control 5.3.2 Additional stopping Means to stop the conveyor shall be provided at intervals throughout its length (see clause on negotiation) The actuation of this stopping device shall induce a locked out position of the stop control The locked out stop control shall prevent restarting until the control device is reset The local stopping shall override any remote control BS EN 12321:2003+A1:2009 EN 12321:2003+A1:2009 (E) 5.3.3 Maintenance and repair immobilisation During maintenance (including tests) or repair the conveyor shall be capable of being completely isolated at the local control panel by means of a lockable switch 5.3.4 Inadvertent movement Where the armoured face conveyor is intended to be used on a gradient (along the face) such that removal of the energy supply to the drive motor(s) does not cause the conveyor chain assembly to come to a stop, means of retardation shall be provided Where a brake is used it shall be positioned on the sprocket side of any torque limiting coupling The local stopping shall override any remote control 5.4 Thermal hazards For unintentional contact, the temperature of hot surfaces (e.g transmission drives) are based on annex B of EN 13202:2000 for 0,5 seconds contact time For the parts that require handling during maintenance the temperature of the touchable surface shall be in accordance with EN 563 for seconds contact time Where this limit can not be achieved see 7.1.4 Where coal dust can accumulate on the surfaces of drives the surface temperature shall not exceed 150 ºC at a maximum ambient temperature which the manufacturer shall give in the used information (see clause 7) 5.5 Fluid power systems 5.5.1 Hydraulic systems shall be designed and installed to conform to EN 982 5.5.2 Hydraulic systems (hydrostatic and hydrodynamic) shall be designed to enable non-toxic fluids as defined in the 7th SCHMOEI Report (see Bibliography) to be used to minimize risks to health 5.5.3 The hydraulic system shall conform to EN 982 and shall be designed to prevent inadvertent pressure intensification above 1.2 of the maximum working pressure of any component All pressure relief valves shall be designed such that they cannot be adjusted above the safe working pressure of the system The adjustment means shall be designed such that they require intentional action and special tools to be adjusted All hydraulic system components shall be compatible with the hydraulic fluid used With the exception of hoses, each individual component shall be capable of safe operation after being subject to a static pressure 50 % in excess of the maximum working pressure permitted in the hydraulic circuit NOTE National legislation implementing EU Directive 92/104/EEC may require the use of fire resistant fluids in hydraulic systems, see clause on negotiation A pressure relief valve capable of relieving the maximum flow of any hydraulic circuit shall be provided at the input to the armoured face conveyor All pressure controls shall be marked to indicate the maximum pressures to which they can be adjusted Where safety valves are required to vent to atmosphere, they shall be guarded or be discharged to an area where it will not create any hazard e.g scalding, fluid injection, slipping 10 BS EN 12321:2003+A1:2009 EN 12321:2003+A1:2009 (E) 5.6 Hydraulic pipes and hoses 5.6.1 Hydraulic lines shall be shrouded to prevent flammable fluid under pressure being ejected from a leak or a burst onto a hot surface All pipes and hoses shall conform to EN ISO 8030 and ISO 6805 5.6.2 Lubrication and hydraulic fluids The type of lubricant/fluid required shall be clearly indicated in the immediate vicinity of the filling point Fluid level indicators shall be provided and be such that levels can be checked taking into account the limited space available in mines Sample points shall be provided taking into account the limited space available in mines Drain points shall be provided taking into account the limited space available in mines, to enable lubricants, fluids to be drained into a receptacle for safe disposal under all intended operating conditions 5.7 Other dangerous areas At the delivery end of side discharge and similar conveyors a means of re-directing any derailed scraper bars/chain assemblies shall be incorporated 5.8 Warning signs Warning signs shall be provided by the manufacturer to alert the operator to those hazards which arise when inspection doors are opened or guards removed for inspection and maintenance purposes (also see 5.10) These warning signs shall be in accordance with EN 61310-2 Symbols used on these warning signs shall be in accordance with ISO 3864 5.9 Transport, installation, operation and maintenance 5.9.1 Design to facilitate handling Lifting points for mechanical handling shall be provided for components weighing in excess of 25 kg that will require to be handled underground Lifting points shall be clearly marked identifying each as a lifting point stating its rated load Where specific lifting points have not been provided for technical reasons, a safe means of handling shall be stipulated in the information for use document (see clause 7) For loads in excess of 25 kg where facilities for controlled handling are provided, e.g handles or hand holes, the maximum mass shall be limited to 25 kg per person 5.9.2 Maintenance, operation and servicing Components shall in general be designed such that standard tools can be used during installation, maintenance and dismantling Any special tools that are required shall be provided by the manufacturer and instructions for their use contained in the information for use (see clause 7) Torque values for fasteners shall be specified in the information for use (see 7.1.2) 11 BS EN 12321:2003+A1:2009 EN 12321:2003+A1:2009 (E) Manufacturers by design shall reduce the likelihood of incorrect assembly e.g asymmetrically shaped components NOTE The need for excessive manual force during dismantling and re-assembly should be avoided, taking account of the tools used, the working space available and operator position During failure of pan connectors, no parts shall be ejected 5.10 Guarding With the exception of sprockets and accessible parts of chains, the moving parts shall be guarded in accordance with EN 953 Guarding of the chain assembly shall be by means of restricted access e.g by the provision of spill plates on the walkway side (see clause on negotiation) Where fluid couplings are used, guarding of the fluid coupling shall be provided incorporating access covers 5.11 Chain locking devices and tensioning devices 5.11.1 Chain tensioning devices Chain tensioning devices shall be provided for tensioning of the chain assembly and shall be designed to be controlled from outside the restricted access provided, e.g by the spill plates In the case of a power failure, the holding force of the chain tensioning device shall be maintained by a secondary device, e.g by means of an integrated mechanical lock or brake The secondary device shall be capable of withstanding the maximum torque applied by the tensioning device of the armoured face conveyor The selector arrangement for engaging and disengaging the tensioner drive shall be interlocked with the power supply to the armoured face conveyor drive to prevent simultaneous operation of the chain tensioning device and conveyor drives 5.11.2 Chain locking devices Chain locking devices shall be capable of withstanding the tensioning force and shall remain in position on the chain whilst in operation The locking devices shall withstand the forces induced during chain tensioning and be marked with a relative proof load and have a factor of safety of 2:1 The locking device shall not induce permanent deformation in the profile of the pan Verification of safety requirements Verification shall be accomplished by reference to annex A of this standard NOTE 12 Testing requirements are given in ISO and EN standards referred to in this standard, together with annex A BS EN 12321:2003+A1:2009 EN 12321:2003+A1:2009 (E) Information for use 7.1 Instruction handbook 7.1.1 General The manufacturer of the armoured face conveyor shall provide at the time of delivery instruction handbook (s) containing information for the safe operation and maintenance of the armoured face conveyor in the language of the country for which the machine is intended to be used The instruction handbook shall be in accordance with 5.5 of EN 292-2:1991 and shall include information mentioned in 1.7.4 of annex A to EN 292-2:1991 This information shall include the duties and conditions under which the equipment is intended to be used, in particular regard to Its intended use; Any prohibitions on use; An overall description and drawing of the armoured face conveyor together with schematic diagrams of the hydraulic systems and the arrangement of controls 7.1.2 Instructions for installation of the equipment The information shall include the need for the User to carry out a risk assessment concerning the relationship with the environment in which the equipment is installed When the armoured face conveyor is supplied unassembled the manufacturer shall provide with the equipment specifications preferably with drawings showing: Torque values for fasteners; The maximum mass and dimensions and lifting points of the separate components supplied; The methods and means for safe assembly of the components; Hydraulic connections; Any special equipment for assembly and settings Where individual items of equipment are assembled with other items of equipment to form a complete machine, the manufacturers of the individual items shall provide sufficient documentation in a form that complies with this standard 7.1.3 Instructions for the use of the equipment The instruction handbook shall include in addition to 5.2 and 5.3 of EN 292-2:1991 the following requirements: Only competent personnel shall start, operate or interfere with the normal working of the equipment; Instructions on safe/correct operation of the armoured face conveyor; The cleaning requirements in order to avoid dangerous accumulation of material/mineral; Specification for lubricants and hydraulic fluids including Health and Safety Data sheets; Instructions that no modifications shall be carried out on the armoured face conveyor without reference to the manufacturer; Information on the location of monitoring points e.g fluid levels, temperature and pressures; Information relating to safe working parameters as shown on displays and on procedures to be followed in case of warning indications shown on displays; 13 BS EN 12321:2003+A1:2009 EN 12321:2003+A1:2009 (E) Information on the safe isolation of the armoured face conveyor from the power supply; Information on operating restrictions to prevent brake fade occurring (see 5.3.4); Chain assembly management; Instructions for start up and shut down procedure; Information on any limitations on ambient operating temperatures (see 5.4); Information on the need for use of gloves when surface temperatures are high 7.1.4 Instruction for maintenance The instruction handbook shall be in accordance with 5.5.1 of EN 292-2:1991 and shall specify in particular: That all adjustments, whether mechanical or electrical shall only be carried out by persons in accordance with a safe system of work as detailed in the manufacturer’s instructions; The conditions under which maintenance works and rectification of faults can be performed e.g the equipment is isolated, protected against unexpected start up and measures taken against unexpected movements; A list of wearing parts as well as the approximate frequency and criteria for their replacement; A list of periodic checks and adjustments; Safe access by means of doors, covers openings and guards; Lifting and jacking points; Information on wear tolerances; Instruction for maintenance of ancillary equipment e.g chain tensioners; Information on safety precautions for maintenance of sprockets, chains and transmissions; Information on special tools; Disposal advice e.g oil, hoses etc; Information on fluids, pressures and adjustment 7.1.5 Training The handbook shall contain any information necessary to allow the armoured face conveyor to be operated and maintained safely, including: Knowledge of the operation of the armoured face conveyor and safety devices; Chain management techniques; Fluid coupling maintenance; Component change procedure; Awareness and understanding of the contents of the manufacturer’s information handbook 14 BS EN 12321:2003+A1:2009 EN 12321:2003+A1:2009 (E) 7.2 Marking The machine shall be legibly and indelibly marked with the following information: !the business name and full address of the manufacturer and, where applicable, his authorised representative;" type and serial number; !designation of the machinery;" maximum speed and inclinations; reference to the instruction handbook; the year of manufacture The text shall be in the official languages of the country for which the machine is intended to be used 15 BS EN 12321:2003+A1:2009 EN 12321:2003+A1:2009 (E) Annex A (Normative) Verification data for safety requirements Table A.1 — Verification data for safety requirements T = Type verification M = Manufacturing test (on every machine built) Clause Calcula- Design Compli Measure- Visual Dynamic Functional Protection Other suppliers tion check -ance (1) (2) (3) Ment examination Test Test Device test documentation (3b) (3c) (4) (5) (6) (7) T T T+M M M T M 5.2.1 5.2.2 T T M M+T M M T M M M M 5.2.3 T M M M M M 5.1 5.1.2 5.3.1 T M M 5.3.2 T M M 5.3.3 T M M 5.3.4 T M M 5.4 T T T T 5.5.1 5.5.2 5.5.3 T T M T T+M 5.6.1 T T+M 5.6.2 T 5.7 T T T+M M M M M T+M M 5.8 M M 5.9.1 T M 5.9.2 T M 5.10 T T+M 5.11.1 T T+M 5.11.2 T T T M M M M M M M M Type verification: Calculation check, the result of which being that the calculations are correct made according to the standard requirements or not Another possibility of calculation check is to replace, if the results are equivalent, by tests with stress measurement Design check, the result of which being to prove that the design requirements of the standard have been matched “on paper” or not Individual verification of each type covering: — Compliance verification (manufacturing check), the results of which being to prove that the machine is built according to the design and that the materials and their assemblies comply with the design documents and are sound This check may include any means of verification e.g.* 16 BS EN 12321:2003+A1:2009 EN 12321:2003+A1:2009 (E) Table A.1 (continued) — *Measurement, the result of which being that the stated measurable parameters have been met with the tolerances required in the C standard or accepted (e.g given in other general standards such as tolerances on dimensions), — *Visual examination, the result of which only being to establish that something is present (a guard or a marking for example) without any appreciation of the quality and characteristics thereof Dynamic test(s): tests out of the range of functional tests, the results of which being to establish that the dynamic testing requirements are satisfied, that all safety devices and their adjustments are adequate and the result of their actuation is as intended Functional tests: the results of which showing that in its normal cycle or part of cycle, the machine works as intended, including all safety devices Where only parts of machines are in the scope of the standard, these tests show that the adequate signals intended to be forwarded to the main control system of the final machine are available and comply with the requirements and with the technical documentation Test of overloading protection devices: the result of which being to show that these safety devices work The verification of the requirements of clause shall be made on one sample of the instruction handbook and on each locomotive for the required marking The verification of the instruction handbook shall include a check that each instruction listed in clause is present and that these are appropriate for the type of locomotive 17 BS EN 12321:2003+A1:2009 EN 12321:2003+A1:2009 (E) Annex ZA (informative) !Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association to provide a means of conforming to Essential Requirements of the New Approach Directive 98/37/EC, amended by 98/79/EC on machinery Once this standard is cited in the Official Journal of the European Communities under that Directive and has been implemented as a national standard in at least one Member State, compliance with the normative clauses of this standard confers, within the limits of the scope of this standard, a presumption of conformity with the relevant Essential Requirements except ESR 1.5.8 and 1.7.4 f) of that Directive and associated EFTA regulations WARNING — Other requirements and other EU Directives may be applicable to the product(s) falling within the scope of this standard." 18