1、NSF International Standard / American National StandardNSF/ANSI 21 - 2015Thermoplastic refuse containersNSF International, an independent, not-for-profit, non-governmental organization, is dedicated to being the leading global provider of public health and safety-based risk management solutions whil
2、e serving the interests of all stakeholders. This Standard is subject to revision. Contact NSF to confirm this revision is current. Users of this Standard may request clarifications and interpretations, or propose revisions by contacting: Chair, Joint Committee on Food Equipment c/o NSF Internationa
3、l 789 North Dixboro Road, P.O. Box 130140 Ann Arbor, Michigan 48113-0140 USA Phone: (734) 769-8010 Telex: 753215 NSF INTL FAX: (734) 769-0109 E-mail: infonsf.org Web: http:/www.nsf.org NSF/ANSI 21 2015 i NSF International Standard/ American National Standard for Food Equipment Thermoplastic refuse c
4、ontainers Standard Developer NSF International NSF International Designated as an ANSI Standard March 4, 2015 American National Standards Institute ii Prepared by The NSF Joint Committee on Food Equipment Recommended for Adoption by The NSF Council of Public Health Consultants Adopted by The NSF Boa
5、rd of Directors May 1967 Revised November 1975 Revised May 1985 Revised September 1996 Revised March 2003 Revised April 2007 Revised April 2009 Revised August 2012 Revised September 2015 Published by NSF International P. O. Box 130140, Ann Arbor, Michigan 48113-0140, USA For ordering copies or for m
6、aking inquiries with regard to this Standard, please reference the designation “NSF/ANSI 21-2015.” Copyright 2012 NSF International Previous editions 2012, 2009, 2007, 2003, 1996, 1985, 1975, 1967 Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by
7、 any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from NSF International. Printed in the United States of America. iii Disclaimers1NSF, in performing its functions in accordance with its objectives, does not assume or undertake to discharge any
8、 responsibility of the manufacturer or any other party. The opinions and findings of NSF represent its professional judgment. NSF shall not be responsible to anyone for the use of or reliance upon this Standard by anyone. NSF shall not incur any obligation or liability for damages, including consequ
9、ential damages, arising out of or in connection with the use, interpretation of, or reliance upon this Standard. NSF Standards provide basic criteria to promote sanitation and protection of the public health. Provisions for mechanical and electrical safety have not been included in this Standard bec
10、ause governmental agencies or other national standards-setting organizations provide safety requirements. Participation in NSF Standards development activities by regulatory agency representatives (federal, local, state) shall not constitute their agencys endorsement of NSF or any of its Standards.
11、Preference is given to the use of performance criteria measurable by examination or testing in NSF Standards development when such performance criteria may reasonably be used in lieu of design, materials, or construction criteria. The illustrations, if provided, are intended to assist in understandi
12、ng their adjacent standard requirements. However, the illustrations may not include all requirements for a specific product or unit, nor do they show the only method of fabricating such arrangements. Such partial drawings shall not be used to justify improper or incomplete design and construction. U
13、nless otherwise referenced, the appendices are not considered an integral part of NSF Standards. The appendices are provided as general guidelines to the manufacturer, regulatory agency, user, or certifying organization. 1The information contained in this Disclaimer is not part of this American Nati
14、onal Standard (ANS) and has not been processed in accordance with ANSIs requirements for an ANS. Therefore, this Disclaimer may contain material that has not been subjected to public review or a consensus process. In addition, it does not contain requirements necessary for conformance to the Standar
15、d. iv This page is intentionally left blank. v Contents 1 General 1 1.1 Purpose . 1 1.2 Scope 1 1.3 Alternate materials, design, and construction . 1 1.4 Measurement 1 2 Normative references 1 3 Definitions 2 4 Materials 2 4.1 General materials requirements 2 5 Design and construction 2 5.1 General
16、design and construction requirements 2 5.2 Watertight container requirements 3 5.3 Non-watertight container requirements . 3 5.4 Cover requirements 3 5.5 Requirements for handles/lifting devices. 3 6 Performance 3 6.1 Cleaning and sanitization resistance . 3 6.2 Impact resistance . 4 6.3 Stress crac
17、king resistance . 4 6.4 Abrasion resistance 4 vi This page is intentionally left blank.vii Foreword2The purpose of this Standard is to establish minimum sanitation requirements for the materials, design and construction of thermoplastic refuse containers. This edition of the Standard (NSF/ANSI 21-20
18、15) includes the following revisions: Issue 6: This revision affirms new language regarding watertight and non-watertight container requirements in section 5. This Standard was developed by the NSF Joint Committee on Food Equipment using the consensus process described by the American National Stand
19、ards Institute (ANSI). Suggestions for improvement of this Standard are welcome. This Standard is maintained on a Continous Maintenance schedule and can be opened for comment at any time. Comments should be sent to Chair, Joint Committee on Food Equipment at standardsnsf.org, or c/o NSF Internationa
20、l, Standards Department, P.O. Box 130140, Ann Arbor, Michigan 48113-0140, USA. 2The information contained in this Foreword is not part of this American National Standard (ANS) and has not been processed in accordance with ANSIs requirements for an ANS. Therefore, this Foreword may contain material t
21、hat has not been subjected to public review or a consensus process. In addition, it does not contain requirements necessary for conformance to the Standard. This page is intentionally left blank. 1 2015 NSF NSF/ANSI 21 2015 NSF/ANSI Standard for Food Equipment Thermoplastic refuse containers 1 Gener
22、al 1.1 Purpose The purpose of this Standard is to establish minimum sanitation requirements for the materials, design, and construction of thermoplastic refuse containers. 1.2 Scope This Standard contains sanitation requirements for new thermoplastic refuse containers intended for the indoor and out
23、door storage of refuse. Thermoplastic refuse container materials and components covered under other NSF or NSF/ANSI Standards or Criteria shall also comply with the requirements therein. This Standard is not intended to restrict new unit design, provided that such design meets the minimum specificat
24、ions described herein. 1.3 Alternate materials, design, and construction While specific materials, design, and construction may be stipulated in this Standard, thermoplastic refuse containers that incorporate alternate materials, design, or construction may be acceptable when such containers meet th
25、e intent of the applicable requirements contained herein. 1.4 Measurement Decimal and SI conversions provided parenthetically shall be considered equivalent. Metric conversions and significant figure rounding have been made according to IEEE/ASTM SI 10. 2 Normative references The following documents
26、 contain provisions that, through reference in this text, constitute provisions of this NSF Standard. At the time this Standard was balloted, the editions indicated below were valid. All documents are subject to revision, and parties are encouraged to investigate the possibility of applying the rece
27、nt editions of the documents indicated below. The most recent published edition of the document shall be used for undated references. ASTM D570-98(2010)e1 Standard Test Method for Water Absorption of Plastics3IEEE/ASTM SI 10 2010. American National Standard for Metric Practice3 NSF/ANSI 170. Glossar
28、y of food equipment terminology3ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 . 2015NSF NSF/ANSI 21 2015 2 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 a
29、re 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, mat
30、erials 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 following thermoplastic materials have acceptable chemical resistance: high-density polyet
31、hylene (HDPE), linear low-density polyethylene (LLDPE), chlorinated poly(vinyl chloride) (CPVC), poly(vinylidene chloride) (PVDC), polysulfone (PSU), poly(vinylidene fluoride) (PVDF), polypropylene (PP), poly(phenylene sulfide) (PPS), polyarylsulfone (PASU), polychlorotrifluoroethylene (PCTFE), and
32、polytrifluoroethylene (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 o
33、r 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
34、). 4.1.6 Materials shall be resistant to stress cracking (see 6.3). 4.1.7 Materials shall be abrasion resistant (see 6.4). 5 Design and construction This section contains design and construction requirements for equipment covered within the scope of this Standard. 5.1 General design and construction
35、 requirements 5.1.1 Thermoplastic refuse containers and their components shall be sealed and easily cleanable. 5.1.2 Internal angles or corners of 135 or less shall be smooth and have minimum continuous radii of 1/8 in (0.13 in, 3.2 mm). 5.1.3 Exposed external corners and angles shall be sealed and
36、smooth. They shall be formed with sufficient radii to facilitate drainage. 5.1.4 Refuse contact surfaces shall be readily accessible and easily cleanable. 2015NSF NSF/ANSI 21 2015 3 5.1.5 The container shall minimize exterior gnawing edges. This requirement shall not apply to raised reinforcing memb
37、ers, 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-
38、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
39、.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 in
40、doors 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 lifting devices that do not have a common wall
41、 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 b
42、e opened with one hand. 5.5 Requirements for handles/lifting devices Handles or lifting devices shall be provided to permit lifting, carrying, and emptying. Handles / lifting devices and attachments shall be readily accessible and easily cleanable. 6 Performance 6.1 Cleaning and sanitization resista
43、nce 6.1.1 Test method 212 5 F (100 3 C) water shall be mixed with chlorine sanitizer until a 200-ppm (mg/L) chlorine concentration is achieved in the bottom of the container. Using a long-handled brush, both the container and the cover shall be thoroughly cleaned with the chlorine mixture. The conta
44、iner shall be emptied and dried, and both the container and the cover shall be examined for evidence of damage. 6.1.2 Acceptance criteria The container and cover shall show no evidence of damage following the cleaning and sanitization procedure. 2015NSF NSF/ANSI 21 2015 4 6.2 Impact resistance 6.2.1
45、 Test method 6.2.1.1 Container Containers shall be loaded with loosely bagged sand (or similar material) at the rate of 4 lb/ft3(64 kg/m3) for non-wheeled containers and 15 lb/ft3(240 kg/m3) for wheeled containers. Containers and covers shall be conditioned at -20 1 F (-29 0.5 C) for a minimum of 24
46、 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 free-falling 2 0.1 in (50 3 mm) diameter metal ball weighing 1.37 0.01 lb (620 4 g) shall be dropped
47、 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 fill
48、ing the container with water. The container shall not leak. 6.3 Stress cracking resistance 6.3.1 Test method 6.3.1.1 Container A 1.0 x 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 s
49、o that it is bent into a 180 “U” shape, with a radius of bend to thickness ratio of 2.5 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. 6.3.1.2 Cover A 0.50 x 2.50 in (13 x 64 mm) specimen shall be cut from a cover with a weld line, if any, in the center of the 2.50 in (64 mm) dimension. The specimen shall be clamped so that it is bent into a 180 “U” shape, with a radius of bend to thicknes
