Bsi bs en 12855 2003 + a1 2010

BRITISH STANDARD Food processing machinery — Rotating bowl cutters — Safety and hygiene requirements ICS 67.250 12&23 135° without a radius is permissible The distance between two edges shall than be > 8,0 mm (see figure C.3) 34 BS EN 12855:2003+A1:2010 EN 12855:2003+A1:2010 (E) Figure C.3 — Angles in the food area Should a corner be formed by the intersection of three planes, then the corners formed shall have angles of > 90° and radii of > 6,4 mm, also corners with an angle of > 135° are permitted without a radius (see figure C.4) Key SURFACES A SURFACES B SURFACES C Figure C.4 — Intersecting surfaces in the food area C.3.2.3 Grooves may be used if the inner radius is ≥ 3,2 mm and the depth < 0,7 times the radius C.3.2.4 Joints and seams shall be welded or sealed and as smooth as the connected surfaces (see figure C.1) C.3.2.5 The surface roughness shall be Rz ≤ 25 µm (see ISO 468:1982), in those areas where it is technically possible Rz ≤16 µm should be selected C.3.3 Splash area C.3.3.1 Surfaces shall be smooth (see figure B.1) C.3.3.2 ≥ 3,2 mm Inside corners: The angle formed by the intersection of two surfaces shall be ≥ 80° and have a radius 35 BS EN 12855:2003+A1:2010 EN 12855:2003+A1:2010 (E) If a corner is formed by the intersection of three surfaces, the corner formed by the intersection of two surfaces shall have a radius ≥ 6,4 mm No requirements apply to the radius for the joining points of the third surface Angles ≥ 110° without radii are admissible (see figure C.3) C.3.3.3 Grooves may be used if the inner radius is ≥ 3,2 mm and the depth < 1,0 times the radius C.3.3.4 Openings are permissible if they go right through and have a diameter ≥ 16 mm C.3.3.5 Joints and seams shall be continuously welded or sealed This requirement does not apply if these joints are formed by overlapping sheet metal surfaces from the top to the bottom in a vertical plane such that there are no horizontal corners in which dirt may be trapped The overlap shall be ≥ 12 mm Joints which not overlap shall be easily separated for cleaning purposes Information see !EN 1672-2:2005", annex B C.3.3.6 Fastening methods: screws, bolts and rivets with low profile heads and of the types shown in figure C.5 may be used only when other fastening methods are impracticable and they are easy to clean (see figure C.5) The following types of screws shall not be used:  Cross head recessed screws;  Hexagon socket head cap screws;  Screws with a diameter < mm 36 BS EN 12855:2003+A1:2010 EN 12855:2003+A1:2010 (E) Key ROUND HEAD OVAL HEAD SLOTTED RAISED COUNTERSUNK HEAD SLOTTED COUNTERSUNK HEAD HEXAGON HEAD HEXAGON HEAD WITH FLANCH HEX DOMED HEAD Figure C.5 — Admissible fasteners - head profiles C.3.3.7 The surface roughness shall comply with the requirements of C.3.1.5 C.3.4 Non-food area Surfaces shall be smooth as far as possible Grooves, corners, holes, gaps and joints shall be avoided as far as possible Closed hollow spaces shall be sufficiently wide to allow thorough cleaning and, where required, disinfecting C.3.5 Floor-type machines C.3.5.1 Wheel-mounted machines Castors should be cleanable (see figure C.6) 37 BS EN 12855:2003+A1:2010 EN 12855:2003+A1:2010 (E) Key b < 25 mm a ≥ 3,5 mm b > 25 mm a ≥ mm b is the largest dimension of coverage on the circumference of the castor Figure C.6 — Castors - dimensions examples 38 BS EN 12855:2003+A1:2010 EN 12855:2003+A1:2010 (E) Annex ZA (informative) !Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/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 one means of conforming to Essential Requirements of the New Approach Directive 2006/42/EC on machinery Once this standard is cited in the Official Journal of the European Union 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 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." 39 BS EN 12855:2003+A1:2010 EN 12855:2003+A1:2010 (E) Bibliography !deleted text" [1] EN 349:1993, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body [2] EN 894-1:1997, Safety of machinery — Ergonomic requirements for the design of displays and control actuators — Part 1: General principles for human interactions with displays and control actuators [3] EN 894-2:1997, Safety of machinery — Ergonomic requirements for the design of displays and control actuators — Part 2: Displays [4] EN 894-3:2000, Safety of machinery — Ergonomic requirements for the design of displays and control actuators — Part 3: Control actuators [5] EN 1050:1996, Safety of Machinery — Principles of risk assessment [6] EN 61310-1:1995, Safety of machinery — Indication, marking and actuation — Part 1: Requirements for visual, auditory and tactile signals (IEC 61310-1:1995) [7] EN 61310-2:1995, Safety of machinery — Indication, marking and actuation — Part 2: Requirements for marking (IEC 61310-2:1995) [8] ISO 468:1982, Surface roughness — Parameters, their values and general rules for specifying requirements [9] EN ISO 11202:1995, Acoustics — Noise emitted by machinery and equipment — Measurement of emission sound pressure levels at a work station and at other specified positions — Survey method in situ (ISO 11202:1995) 40 blank BS EN 12855:2003 +A1:2010 BSI - 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