BS EN 1009-3 pdf free download
BS EN 1009-3-2020 pdf free download.Machines for mechanical processing of minerals and similar solid materials – Safety Part 3: Specific requirements for crushing and milling machinery.
4.1.2 Maintenance
A safe means of access (e.g. permanent or temporary working platform) around the crusher is required to handle and remove the wear parts.
This access platform shall meet requirements of 4.1.3 to be used for process monitoring.
The minimum operating loads of temporary working platform shall be 1,5 kN/m2 under distributed load for the structure.
In case of adjustable temporary working platform fitted with a locking mechanism, it shall hold twice the minimum operating loads of temporary working platform.
If there is a risk of falling during maintenance operation, anchorage points shall be provided in accordance with tests of EN 795:2012.
For maintenance work in the crushing chamber, isolation and energy dissipation shall be provided for the crusher as well as for upstream and downstream sub-assemblies. See EN 1009-1:2020.4.10.1.
4.1.3 Process monitoring
When a clear view to crusher feeding area is required according to the instruction handbook of the manufacturer to ensure effective process, the following safety aspects need to be considered:
— if a permanent access platform is fitted, the inspection area shall comply with EN ISO 14122-2:20 16 and be guarded to protect the operator from ejection of rocks and contact with the feeding area of the machine as well as falling hazards;
The permanent access platform may be same as the maintenance platform.
— remote monitoring such as CCTV system or an automatic material control system (e.g. level sensing and control) shall be provided when the feeding area is out of vision of the operator.
Means shall be provided to control the material feeding in order to stop the upstream material flow in case of a blockage (e.g. current control, speed control, level control). Purpose of this is to reduce overlilling and falling objects occurrences and to identify blockages in order to reduce necessity for interventions for clearing out machines. Appropriate instructions shall be included in the instruction handbook, see 6.3.
NOTE The control of the material feeding function is a process function. nota safety function.
4.1.4 Wear parts handling
Mounting and dismounting of new and/or used wear parts shall be in accordance with EN 1009-1:2020,4.17.
NOTE The specific lifting accessories can be designed-in and/or implemented to the machine as a separate element (e.g. eyelet, specific tool or any device to facilitate handling).
4.2 Jaw crusher
4.2.1 Coil spring tensioned tension rods of jaw crushers shall be guarded according to EN 1009-1:2020,
4.11, in such a way that the parts of the rods are retained in the event of break up.
4.2.2 When the crusher is in operation, means shall be provided for hands and feet to be prevented from touching the tension springs.
4.2.3 The design of the machine shall take in account the need for safe exchange of the toggle plate(s). jaw dies and cheek plates according to EN 1009-1:2020, 4.17.5 and appropriate instructions shall be included in the instruction handbook
4.2.4 Where it is intended that the operator enter inside the crushing chamber, a means shall be designed or provided in order to:
— allow access in comfortable conditions with access openings complying with EN 1009-1:2020, 4.2.2;
— prevent operator from falling; and
— ensure that jaw crusher liners cannot accidentally fall during maintenance work
Where special equipment or accessories are required (e.g. additional temporary working platform), they shall be provided by the manufacturer.
If part of the machinery can be used as a safe working platform, there is no need for providing special equipment or accessories.
If a temporary working platform is provided, it shall be designed to:
— take into account presumable crushing chamber geometry changes (e.g. available liner options, crusher setting adjustment and the amount of wear);
— in case of adjustable platform, ensure that the locking mechanism will hold required forces of 4.1.2;
— enable safe use of ladders (when required);
NOTE If jaw liners are constructed from two pieces it can be necessary to provide two separate platforms.
lithe crushing chamber and the feed hopper by design protect the worker from falling, then guardrails are not required.
The manufacturer of the platform shall provide operating instructions. See 6.3. Special attention shall be given to:
— residual risks;
— inspection and repair instructions;
— limitations related to crusher types (e.g. crusher models or sizes).
4.2.5 The feed opening of the crusher shall be provided with a guard to minimize hazards caused by ejected material.
When raised for maintenance, the guard shall be provided with means to prevent it falling down from its position when opened.
4.2.6 Means shall be foreseen to solve blockages (e.g. hydraulic rock breaker, reverse rotating) and instructions shall be provided, see 6.3.
4.2.7 If means of access is permanently installed adjacent to crusher inlet and if manufacturer permits access during operation, then platform shall comply with whole body vibration standard according to ISO 263 1-1:1997. In all other cases, restricted areas shall be defined in the instruction handbook
NOTE Clearing of blockages is not normal operation. In case of using the means of access only during clearing blockages while the crusher is running this vibration standard is not applicable. For using the means of access for maintenance work while the crusher Is not running, this vibration standard Is also not applicable.BS EN 1009-3 pdf download.
