ANSI NSF 3-A SSI 14159-3-2014 Hygiene requirements for the design of mechanical belt conveyors used in meat and poultry processing.pdf
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1、 *0!.*0%+*(0* . %)!.%*0%+*(0* . %! 0* . NSF/ANSI $2 SSI “%“ materials classified as hazardous substances (such as carcinogens, mutagens, and teratogens); asbestos and asbestos containing materials; wood; enamelware; porcelain; leather; uncoated aluminum and aluminum alloys; uncoated anodized aluminu
2、m and aluminum alloys; or glass.4.1.2 PaintPaint shall not be used on product contact surfaces. Parts removable for cleaning having both product contact and non-product contact surfaces shall not be painted.4.2 Product contact surfacesIn addition to the general requirements (see 4.1), materials used
3、 for product contact surfaces shall: be corrosion resistant to both product and cleaning/sanitization materials; be non-toxic; not contaminate or otherwise have any adverse effect on the product; be non-absorbent (except where technically or functionally unavoidable); or be temperature resistant to
4、processing and heat treatments where necessary (e.g., freezing, heat-sterilization).4.2.1 Metals4.2.1.1 Product contact surfaces shall be: AISI 300 series stainless steel; or 2015 NSF NSF/ANSI/3-A SSI 14159-3 20145 when necessary, stainless steel that has been hardened by heat treatment or precipita
5、tion hardening, including Martensitic stainless steel; or other alloys which can be shown to be as corrosion resistant as austenitic stainless steel; or other metals and metal alloys (including solder) suitable for the conditions of intended use (see annex B).4.2.1.2 Copper and copper alloys, bronze
6、, brass, and zinc galvanizing shall not be used for product contact surfaces. These materials may be used in supply air and supply water lines or for gears and bushings used in non-product surfaces. 4.2.1.3 Surface coatings and platings may be used if the base material is non-toxic. Non-metallic coa
7、tings shall meet the requirements of 4.2.2.4.2.2 Non-metalsProduct contact surfaces shall be manufactured from or composed of substances that: may not reasonably be expected to result, directly or indirectly, in their becoming a component of food, or otherwise affecting the characteristics of food,
8、including the imparting of a color, taste, or odor to food; or are generally recognized as safe or have received prior sanction for their intended use; or are regulated as indirect food additives under the provisions of 21 CFR, parts 174-189; or are exempt from regulation as food additives under the
9、 provisions of the 21 CFR, part 170.39; or can be demonstrated to be safe for the intended use, subject to the Food, Drug, and Cosmetic Act, Section 409(h)(1) 21 U.S.C. 348(h)(1), Premarket Notification.4.2.2.1 Elastomers and polymers having product contact surfaces shall be of such composition as t
10、o retain their surface and conformational characteristics when exposed to the conditions encountered in the environment of intended use and in cleaning and sanitization or sterilization.4.2.2.2 Adhesives and the bonds created by their use shall be compatible with the surfaces, products, and cleaning
11、/sanitizing materials in which they are in contact. All bonds shall be continuous and mechanically sound so that the adhesives do not separate from the base materials to which they are bonded.4.2.2.3 Where materials having certain inherent functional purposes are required for specific application, p
12、roduct contact surfaces may be made of these materials (e.g., carbon, sapphire, quartz, fluorspar, spinel, ceramic materials).4.2.2.4 Gaskets, O-rings, etc., shall be non-toxic, non-porous, non-absorbent, and unaffected by food products.4.3 Non-product contact surfacesIn addition to the general requ
13、irements (see 4.1), materials used for non-product contact surfaces, (including splash areas) under the conditions of intended use, shall: be of corrosion resistant material or material that is treated (e.g., coating, painting) so as to be corrosion resistant to both product and cleaning/sanitizing
14、materials. When coated, the coating shall adhere; be non-absorbent; and 2015 NSF NSF/ANSI/3-A SSI 14159-3 20146 not contaminate or otherwise have any adverse effect on the product.Parts removable for cleaning having both product contact and non-product contact surfaces shall be designed to ensure th
15、at hygiene risks are eliminated in accordance with the requirements for product contact surfaces.5 Design and construction5.1 Product contact surfacesThe following criteria apply to all product contact surfaces.5.1.1 Surface textureSurfaces shall be free of imperfections such as pits, folds, cracks,
16、 and crevices. Surface textures shall have a maximum Raof 32 in (0.81 m). When necessary, due to functional needs, the following may be used: glass-beaded or shot-peened surfaces with a maximum Raof 125 in (3.2 m); coatings with a maximum Raof 200 in (5.0 m); or machined plastics with a maximum Raof
17、 125 in (3.2 m).NOTE The 2B mill finish on stainless steel sheet is also considered as smooth or smoother than a No. 4 finish. No further finishing is required if the finish is free of defects, such as pits, scratches, chips, or flakes in the final fabricated form. Belts are exempt from surface text
18、ure requirements. Belts (flat, modular, link, or wire) shall meet the requirements of 5.1.2.5.1.2 Cleaning and inspectionSurfaces shall be cleanable. For mechanical belt conveyors intended to be disassembled, the design shall ensure that product contact surfaces are easily accessible for cleaning an
19、d inspection, and the demountable parts shall be easily removable. Alternatively, mechanical belt conveyors designed to be cleaned in place shall be designed so that product contact surfaces and all non-removed appurtenances thereto can be mechanically cleaned and are easily accessible and easily re
20、movable for inspection.5.1.3 Disinfection and sanitizationWhere appropriate, mechanical belt conveyors shall be designed such that surfaces can attain the required disinfection or sanitization conditions.5.1.4 Microbial ingressWhere appropriate (e.g., aseptic process), mechanical belt conveyors shal
21、l be designed to prevent microorganisms migrating from the external environment onto product contact surfaces, either directly or via soils.5.1.5 DrainingSurfaces of mechanical belt conveyors shall be self draining or drainable. Equipment that uses a single pass water flush shall have a drain that d
22、irects water to a non-product contact area. 2015 NSF NSF/ANSI/3-A SSI 14159-3 201475.1.6 Dead spacesThere shall be no dead spaces.5.1.7 Joints5.1.7.1 Permanent metal-to-metal joints shall be continuously welded. Jointed surfaces shall be flush.5.1.7.2 Dismountable/removable joints shall be flush and
23、 sealed at the product contact surface.5.1.7.3 Only in cases where welding or bonding is impractical, silver soldering, press-fitting, or shrink-fittings, may be employed where necessary for essential functional reasons.5.1.7.4 Welding, press-fitting, shrink-fitting, or soldering shall produce produ
24、ct contact surfaces with a smooth finish free of imperfections such as pits, fold, inclusions, cracks, and crevices.5.1.7.5 Belts (flat, modular, link, or wire) are exempt from the requirements of 5.1.7.1 through 5.1.7.4. Belts shall meet the requirements of 6.5.1.8 CoatingsCoatings shall be free fr
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