EN 14656:2006

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Safety of machinery - Safety requirements for extrusion presses for steel and non-ferrous metalsVarnost strojev - Varnostne zahteve za stiskalnice za iztiskanje jekla in nekovinskih materialovSécurité des machines - Exigences de sécurité pour presses a filer l'acier et les métaux non ferreuxSicherheit von Maschinen - Sicherheitsanforderungen an Strangpressen für Stahl und NE-MetalleTa slovenski standard je istoveten z:EN 14656:2006SIST EN 14656:2007en25.120.10Kovaški stroji. Stiskalnice. ŠkarjeForging equipment. Presses. Shears13.110Varnost strojevSafety of machineryICS:SLOVENSKI
STANDARDSIST EN 14656:200701-januar-2007

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14656October 2006ICS 25.120.10 English VersionSafety of machinery - Safety requirements for extrusion pressesfor steel and non-ferrous metalsSécurité des machines - Exigences de sécurité pourpresses à filer l'acier et les métaux non ferreuxSicherheit von Maschinen - Sicherheitsanforderungen anStrangpressen für Stahl und NE-MetalleThis European Standard was approved by CEN on 4 September 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14656:2006: E

Safety requirements for hydraulic, pressure water and lubrication systems.28 Annex B (normative)
Safety requirements and/or measures for electrical equipment for extrusion presses.34 Annex C (normative)
Noise test code.37 Annex D (informative)
De-commissioning.42 Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC.43 Bibliography.44
Figures Figure A.1 — Detail of the hydraulic diagram for limitation of set-up speed.30 Figure C.1 — Example of measuring points for noise measurement (location of workstations).40
Tables Table B.1 — Emergency functions for extrusion presses.36 Table C.1 — Example of declared dual-number noise values.40

1 Scope This European Standard applies to:  extrusion presses from the exit side of the heater through associated handling, cooling and quenching equipment including, e.g. the puller, the hot saw, the run-out table, the stretcher, the cold saw, cold saw table and/or coiler when incorporated into the equipment, to a point where the extruded product is passed to associated finishing equipment. It specifies the health and safety requirements at all stages in the life of the equipment, its design, ordering, construction, use and disposal. This European Standard specifies requirements to be met by the manufacturer to ensure the health and safety of persons during construction, transport, commissioning, operation, maintenance and de-commissioning, as well as in the event of foreseeable faults as malfunctions which may occur in the equipment. This European Standard deals with all significant hazards, hazardous situations and events relevant to extrusion presses when they are used as intended and under conditions which are reasonably foreseeable by the manufacturer (see Clause 4). This European Standard is not applicable to extrusion presses which are manufactured before the date of its publication as EN. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 294, Safety of machinery — Safety distances to prevent danger zones being reached by the upper limbs EN 349, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body EN 418:1992, Safety of machinery — Emergency stop equipment, functional aspects — Principles for design EN 5631), Safety of machinery — Temperatures of touchable surfaces — Ergonomics data to establish temperature limit values for hot surfaces EN 614-1, Safety of machinery — Ergonomic design principles — Part 1: Terminology and general principles EN 626-1, Safety of machinery — Reduction of risks to health from hazardous substances emitted by machinery — Part 1: Principles and specifications for machinery manufacturers EN 811, Safety of machinery — Safety distances to prevent danger zones being reached by the lower limbs EN 842, Safety of machinery — Visual danger signals — General requirements, design and testing EN 894-1, Safety of machinery — Ergonomics requirements for the design of displays and control actuators — Part 1: General principles for human interactions with displays and control actuators
1) Will be superseded by prEN ISO 14732-2.

2) Will be superseded by prEN ISO 13849-1.

EN ISO 14122-4; c) surfaces for walking or standing shall be so designed, that risks of slipping caused by scale, oil and/or lubricant are minimised; d) the relevant category for controls for access to equipment during operation or maintenance shall be selected from B.2 and consider the requirements of EN 1037; e) areas of the equipment which are entered regularly due to maintenance reasons shall be easily accessible and considering a). 5.1.11 Electrical equipment Electrical equipment shall meet the requirements of EN 60204-1. In particular the manufacturer shall construct and install all electrical equipment so that it is capable of withstanding all hazards, including those from heat, vibration, wet conditions, identified in the risk assessment required at the design stage and taking into account the requirement set out in Annex B. 5.1.12 Safety control system Each safety control shall be selected in accordance with the severity of the risk as described in EN 954-1. The function of each safety control shall be considered in combination with other elements of the safety control system and shall be selected so as it does not reduce the safety level of any other component of the control system. For the hazards listed in Table 1 where an electrical control system is involved a risk assessment shall be carried out according to EN 954-1. 5.1.13 Guards Guards shall be provided to prevent access to a danger zone. They shall be selected as appropriate for the degree and frequency of access to be permitted, e.g. an enclosing guard or distance guard, fixed or movable with interlock. This selection shall be made according to EN 953. Interlock systems shall meet the requirements of EN 1088. The requirements of the guards shall conform to Clause 5 of EN 953:1997 and to EN 294, EN 349, EN 811. 5.1.14 Surface temperatures Surfaces, which are intended to be touched with bare hands, shall have temperatures not exceeding the burn threshold for the contact time and material as specified in EN 563. 5.1.15 Operators' visibility A good operators' visibility to the operating process shall be provided. Where it is not possible to prevent access to hazardous areas which are not naturally visible from the operator’s position, e.g. the die during break-through of the profile, devices shall be provided

V: Visual inspection verifies the required features of the components.

1 800 mm high which enclose the danger zone.  See 5.1.13 D, V
1.2 Fixed distance guards may include interlocked movable guards which, when opened, stop the movement of components before access is possible. The interlocked movable guards shall also stop the movement of components in other sections of the machine, e.g. those in the press and die handling areas, if access is possible to them from the billet handling area.  See 5.1.13  EN 1088
 See 5.1.12 D, V, M
1.3 Where ducts through guards are necessary they shall be so designed that any possible access shall be prevented.  See 5.1.13 V

2 Unexpected move-ment or start-up of components during non-production cycles, e.g. during maintenance, inspection, repair and setting. 2.2 Where interlocked movable guards are provided, the valves and isolators shall be activated by the guard interlocking devices. Valves and isolators shall remain de-activated even when guards are closed, and shall only be re-activated from safe positions outside the protected hazardous area with a clear adequate view of the danger zone.  See 5.1.12  See 5.1.13 D, V, M Impact 1 Struck by falling materials or tools falling from overhead. 1.1 Provide toeboards at open edges of permanent working platforms and walkways.  See 5.1.10  EN ISO 14122-2 D, V
2 Ejected parts of equipment. 2.1 Select components to withstand design forces.  See 5.1.13  EN 1088 D
3 Falling machine components during their removal or replacement. 3.1 Mechanical protection against unexpected movement of component(s) during removal or replacement, e.g. temporary securing bolts, latches, supports.  See 5.3.4 V, D
3.2 Operating/maintenance instruction: include advice on means to support components.  See 7.6 V 4.1 Fixed distance guards at least
1 800 mm high which enclose the danger zone.  See 5.1.13 D, V
4 Trapping between stationary and rolling billets on transfer ramp between furnace and billet transfer arms, and on billet reject conveyor. 4.2 Fixed distance guards may include interlocked movable guards which, when opened, stop the movement of components before access is possible. The interlocked movable guards shall also stop the movement of dangerous components in other sections of the equipment, e.g. those in the press and die handling area, if access to them is possible from the billet handling area.  See 5.1.12  See 5.1.13  EN 999  EN 1088  EN 60204-1 D, V, M 5.2.1.2 Thermal hazards for all metals Burns 1 Contact with hot surfaces, e.g. billet and billet transfer devices. 1.1 The guards provided to prevent impact injuries shall be designed to prevent accidental contact with hot billets and billet transfer devices during production cycles.  See 5.1.13 D, V
1.2 Appropriate signs giving warning of hot surfaces affixed to the guards.  See 5.1.9  EN 61310-1 D, V

1.3 Operating/maintenance instruction: include advice on appropriate personal protective equipment, e.g. fire resistant gloves and overalls for maintenance and similar activities.  See 5.1.8  See 7.6 V
2 Contact with billets on transfer ramp between heater and billet transfer arms, on the billet reject conveyor and on the hot billet storage rack. 2.1 The guards provided to prevent impact injuries shall be designed to prevent contact with hot billets.  See 5.1.13 D, V Fire 1 Bursting of, or leaks from hydraulic hoses, pipes and fittings 1.1 Protect hoses, pipes and fittings with metal shields or covers.  See Annex A V
2 Ignition of oil on billet transfer conveyor or ramp. 2.1 Operating/maintenance instruction: include advice on regular cleaning.  See 7.5.5 V 5.2.1.3 Additional requirements for aluminium presses Scalds 1 Contact with hot billet quenching water. 1.1 Provide local shielding to contain spraying hot water.  See 5.1.13 D, V 5.2.2 Press, die and disc handling equipment 5.2.2.1 Mechanical hazards for all metals 1.1 Fixed guards at all possible access points to prevent access to the dangerous moving components by any part of a person’s body.  See 5.1.10  See 5.1.13 D, V 1.2 If the above is not possible, provide fixed distance guards at least 1 800 mm high which enclose the danger zone.  See 5.1.13 D, V 1.3 Fixed distance guards may include interlocked movable guards which, when opened, stop the movement of components before access is possible. The interlocked movable guards shall also stop the movement of dangerous components in other sections of the equipment, e.g. those in the billet handling and transfer area, if access is possible to them from the press and die handling area.  See 5.1.12  See 5.1.13  EN 1088 D, V, M Crushing, shearing, severing, entangle-ment 1 Access into danger zone when internal components are in motion, e.g.  press ram,  movable crosshead,  container holder,  side rams,  transmission machinery,  die carrier,  butt shear or saw or other cutting devices,  butt-end discard pusher and  discard conveyer. 1.4 Where ducts through guards are necessary they shall be so designed that any possible access shall be prevented.  See 5.1.13 D, V, M
2 Unexpected movement or start-up of components during non-production cycles, e.g. during maintenance, inspection, repair and 2.1 Provide means to stop supply of energy and where appropriate release of unnecessary residual energy to the components, e.g. by hydraulic dump valves, pneumatic exhaust valves and electrical isolators.  See 5.1.16  EN 982  EN 983  EN 60204-1 D, V, M

3 Access into danger zone when the dummy block loading device and the dummy block and butt end catcher are in operation. 3.1 The components shall be enclosed by the guards required to prevent this hazard under 5.2.1.1 “Mechanical hazards for all metals” above.  See 5.1.13 D, V Impact 1 Ejection of parts of the die. 1.1 Operating/maintenance instruction: include advice on the maintenance of the die carrier to ensure it is correctly aligned before extrusion commences.  See 7.6 V 2.1 Provide shielding to contain ejected particles within the press area.  See 5.1.13 D; V
2 Ejection of scale and flush from die/container sealing area. 2.2 Appropriate signs giving warning of ejected particles.  See 5.1.9  EN 61310-1 D, V
2.3 Operating/maintenance instruction: include advice on the use of appropriate PPE, e.g. eye protection.  See 5.1.8  See 7.5.5 V 3.1 Provide remote means of inspection to establish quality of break through at the die, e.g. closed circuit television or mirrors and  See 5.1.15 D, V, M 3.2 a light beam in the area of the break through of the die. If interrupted, it shall stop the extrusion process and  EN 954-1  EN 61496-1 D, V, M
3 Ejection of fragments of mandrels, broken dies or extruded metal during break through. 3.3 a solid fence at the end of the run-out table which is of sufficient strength to withstand the impact of an ejected mandrel and die fragment.  See 5.1.13 V, D, M
4 Struck by falling materials or tools falling from overhead. 4.1 Provide toeboards at open edges of permanent working platforms and walkways  See 5.1.6  EN ISO 14122-2 D, V
5 Falling machine components during their removal or replacement. 5.1 Mechanical protection against unexpected movement of component during removal or replacement, e. g. temporary securing bolts, latches, supports.  See 5.3.4 D, V
5.2 Operating/maintenance instruction: include advice on means to support components.  See 7.6 V

6 Slip, trip, falls. 6.1 Ladders, walkways, floors and stairs shall be designed and constructed without any tripping hazards, be easy to maintain and keep clean, treated with slip resistant material and positioned to not be contaminated with oils and greases.  See 5.1.10 V, D
6.2 Provide adequate lighting on the equipment if appropriate.  EN 1837 D 7.1 Design to obtain access to various parts of machine and eliminate potential risks by guard rails around open edges of platforms, walkways and stairs.  See 5.1.10 D
7 Falls from heights. 7.2 Locate calibration and regular lubrication points at places which are easily accessible for maintenance.  See 5.1.10  See 5.1.16 D 5.2.2.1.1 Additional requirements for copper and brass presses 1.1 Provide a fixed guards or a combi-nation of fixed guards to prevent access to the moving components and  See 5.1.13 V 1.2 interlocked movable guards, or  See 5.1.13  EN 1088 V Crushing, shearing, severing, entangle-ment 1 Access between the moving die and the clamping devices at die changing area. 1.3 light beams which will stop the movement of the components before access is possible.  EN 954-1  EN 999  EN 61496-1 V, M 5.2.2.2 Thermal hazards for all metals Burns 1 Contact with hot surfaces, e.g., during die changing and entry for maintenance. 1.1 Appropriate signs giving warning of hot surfaces affixed to the guards provided to prevent crushing and/or shearing and/or severing and/or entanglement.  See 5.1.9  See 5.1.10  EN 61310-1 D, V
1.2 Operating/maintenance instruction: include advice on the use of appropriate PPE, e.g. fire resistant gloves and overalls.  See 5.1.8  See 7.5.5 V Fire 1 Bursting of, or leaks from, hydraulic hoses, pipes and fittings. 1.1 Protect hoses, pipes and fittings with means of metal shields or covers.  See Annex A D, V
2.1 Provide scale collecting devices.  See 5.1.7 D, V, M 2.2 Provide gratings to cover oil sump.  See 5.1.7 D, V, M
2 Ignition of oil and other combustible materials by hot material, e.g., billet, butt-ends and scale falling into oil sump. 2.3 Operating/maintenance instruction: include advice on regular cleaning of oil sump. The scale collecting area shall be designed to allow safe access for regular cleaning and shall be free of obstacles.  See 5.1.7  See 5.1.10  See 7.5.5 D, V

1.2 Operating/maintenance instruction: include advice on the use of appropriate PPE, e.g. fire resistant gloves and overalls.  See 5.1.8  See 7.5.5 V 5.2.2.2.2 Additional requirements for steel presses Burns 1 Contact with flying hot cuttings. 1.1 Provide shielding.  See 5.1.13 D, V 5.2.2.2.3 Additional requirements for copper and brass presses Burns 1 Contact with hot butt-ends on butt-end reject conveyor.
1.1 Provide fixed screens to prevent contact with butt ends.  See 5.1.13 D, V 5.2.3 Run-out, cooling and finishing equipment 5.2.3.1 Mechanical hazards for all metals Crushing, shearing, severing, entangle-ment 1 Access to trans-mission machinery, e.g. chains and sprockets, belts and pulleys and rotating drive shafts. 1.1 Totally enclose in the machine frame or provide local fixed guards which prevent access to the injury-causing components, e. g. shafts and in-running nips of rotating/moving driven elements.  See 5.1.10  See 5.1.12  See 5.3.2 D, V, M 5.2.3.1.1 Additional requirements for aluminium presses 1.1 Provide fixed guards at least
1 800 mm high at rear of the run-out table, which extend for the full length of the run-out table.  See 5.1.13 D, V Crushing, shearing, severing, entangle-ment 1 Access to moving components, e.g., puller jaws, hot saw or other extrusion cutting device. 1.2 The hot saw blade shall be retained in a covered enclosure when not cutting extrusions.  See 5.1.13 D, V
1.3 Provide a light beam across the open area between the die to the cooling table which, if interrupted, will stop the operation of the puller jaws and will either a) return the hot saw blade to its enclosure or b) stop the movement of any other ancillary devices of this area.  See 5.1.5  EN 954-1  EN 61496-1 D, V, M
2 Access between closing stretcher jaws. 2.1 Provide light guards or other devices which shall, if interrupted, return the jaws to their open position.  See 5.1.13  EN 954-1  EN 61496-1 D, V, M

1 800 mm high at the rear of the run-out table, which extend for the full length of the run-out table.  See 5.1.13 V
1.2 The fixed guards may include interlocked movable guards which, when opened, stop the movement of the puller before access is possible.  See 5.1.13  EN 1088 V, M
1.3 Provide light beams or proximity detectors, etc. extending the complete length of the run-out table and positioned between the run-out table and cooling beds which, if interrupted, shall arrest any movement of the puller, or provide other safety arrangemen
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