NSF ANSI 21-2015 pdf free download

NSF ANSI 21-2015 pdf free download. Food Equipment一 Thermoplastic refuse containers.
3 Definitions Terms used in this Standard that have special technical meaning are defined in NSF/ANSI 170. 4 Materials The requirements contained in this section are intended to ensure that the materials used in the manufacture of thermoplastic refuse containers are unaffected by exposure to refuse and other substances that may contact the materials in the intended use environment. 4.1 General materials requirements 4.1.1 When evaluated against ASTM D570, materials shall not increase in weight by more than 0.5%. 4.1.2 Materials shall be resistant to household chemicals including, but not limited to, detergents, disinfectants, deodorants, and insecticides. NOTE – The fllowing thermoplastic materials have acceptable chemical resistance: high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), chlorinated poly(vinyl chloride) (CPVC), poly(vinyidene chloride) (PVDC), polysulfone (PSU), poly(vinylidene fluoride) (PVDF), polypropylene (PP), poly(phenylene sulfide) (PPS), polyarylsulfone (PASU)， polychlorotrifluoroethylene (PCTFE)， and polyrifluoroethylene (PTFE). Additional thermoplastic materials may be acceptable provided that manufacturers supply documentation of material chemical resistance. 4.1.3 Thermoplastic refuse containers intended primarily for the outdoor storage of refuse shall contain a minimum of 2% carbon black or equivalent ultraviolet protection. If a UV protectant other than 2% carbon black is employed, the manufacturer shall provide data showing its equivalency. 4.1.4 Materials shall not sustain damage during routine cleaning and sanitization (see 6.1). . 4.1 .5 Materials shall be impact resistant (see 6.2).
5.1.5 The container shall minimize exterior gnawing edges. This requirement shall not apply to raised reinforcing members, decorative features, or lifting devices that do not have a common wall with the container. 5.2 Watertight container requirements 5.2.1 The container shall be watertight. 5.2.2 The container shall be designed and manufactured so that refuse empties easily when the container is inverted. 5.3 Non-watertight container requirements 5.3.1 The container shall be used with a leak proof liner and shall be permanently marked with “This container requires the use of a leak proof”, or equivalent. 5.3.2 Non-watertight containers are exempt from the sealing requirements in 5.1. 5.4 Cover requirements 5.4.1 When in place, the cover shall overlap and continuously contact the container opening. 5.4.2 Thermoplastic refuse containers used primarily outdoors shall have a cover that, when in place, prevents water from entering the container opening. NOTE – Thermoplastic refuse containers used primarily indoors are exempt from this requirement. Covers with swinging-closure mechanisms are acceptable for indoor use. 5.4.3 The cover shall minimize exterior gnawing edges. This requirement shall not apply to raised reinforcing members, decorative features, or lfting devices that do not have a common wall with the cover. 5.4.4 The cover shall be designed and manufactured so that it provides for secure attachment to the container. The disengagement of the attachment device (for removable covers) shall permit the removal of the cover with one hand. Hinged covers are acceptable provided that they can be opened with one hand.
6.2 Impact resistance 6.2.1 Test method 6.2.1.1 Container Containers shall be loaded with loosely bagged sand (or similar material) at the rate of 4 lb/tt?t (64 kg/m3) for non-wheeled containers and 15 Ib/ft* (240 kg/m°) for wheeled containers. Containers and covers shall be conditioned at -20士1 °F (-29土0.5 °C) for a minimum of 24 h. Non-wheeled containers shall be dropped on a bottom corner from a height of 4.0 ft (1.2 m). Wheeled containers shall be dropped on a bottom corner from a height of 1.0 ft (0.3 m). 6.2.1.2 Cover A fe-falling 2士0.1 in (50土3 mm) diameter metal ball weighing 1.37土0.01 Ib (620士4 g) shall be dropped from a height of 105 in (2.7 m) and shall impact the cover at any location with 12 foot- pounds (16.3 J). 6.2.2 Acceptance criteria The container and cover shall show no evidence of breakage or permanent deformation. If not discernible by visual or tactile means, breakage shall be determined by fling the container with water. The container shall not leak. 6.3 Stress cracking resistance 6.3.1 Test method 6.3.1.1 Container A1.0x 6.0 in (25 X 150 mm) specimen shall be cut from a container with a weld line, if any, in the center of the 6.0 in (150 mm) dimension. The specimen shall be clamped so that it is bent into a 180°“U” shape, with a radius of bend to thickness ratio of 2.5土0.2. The clamped specimen shall be immersed in a beaker containing a nonionic surfactant, such as nonoxynol or equivalent. The specimen shall remain in the beaker at room temperature for 16 h.