1、NSF International Standard / American National StandardNSF/ANSI 52 - 2017Supplemental FlooringNSF 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 while serving
2、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: Chairperson, Joint Committee on Food Equipment c/o NSF International 78
3、9 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 i NSF International Standard/ American National Standard For Food Equipment Supplemental flooring Standard Developer NS
4、F International NSF International Designated as an ANSI Standard February 19, 2017 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 NSF International November 1978 Reaffi
5、rmed November 1984 Revised November 1992 Revised August 2003 Revised July 2005 Revised April 2007 Editorial revision May 2007 Revised February 2009 Revised August 2012 Revised March 2017 Published by NSF International PO Box 130140, Ann Arbor, Michigan 48113-0140, USA For ordering copies or for maki
6、ng inquiries with regard to this Standard, please reference the designation “NSF/ANSI 52 2017.“ Copyright 2017 NSF International Previous editions 2012, 2009, 2007, 2005, 2003, 1992, 1978 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in an
7、y form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from NSF International. Printed in the United States of America. iii Disclaimers1 NSF, in performing its functions in accordance with its objectives, does not assume or undertake to
8、discharge any 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, incl
9、uding consequential 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
10、 Standard because 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 it
11、s Standards. 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 i
12、n understanding 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 co
13、nstruction. Unless otherwise referenced, the annexes are not considered an integral part of NSF Standards. The annexes are provided as general guidelines to the manufacturer, regulatory agency, user, or certifying organization. 1 The information contained in this Disclaimer is not part of this Ameri
14、can National 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
15、 Standard. This page is intentionally left blank.v Content 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 . 2 4.2 Resistance to microorganisms . 2 4.3 Resistanc
16、e to environment . 2 4.4 Tensile strength 2 4.5 Specific gravity . 2 5 Design and construction . 3 5.1 General . 3 5.2 Cleanability . 3 5.3 Self-draining . 3 5.4 Manufacturers instructions 3 6 Performance . 3 6.1 Resistance to microorganisms . 3 6.2 Absorption / adsorption 4 6.3 Temperature resistan
17、ce . 5 6.4 Tensile testing 6 6.5 Specific gravity . 7 Annex A Food Equipment Joint Committee 9 This page is intentionally left blank.vii Foreword2 NSF/ANSI 52 establishes minimum sanitation and food safety requirements for the materials, design, and manufacture of supplemental flooring intended for
18、use in food preparation, dry storage, and warewashing areas. Issue 7 This revision updated normative references in section 2. This Standard was developed by the NSF Joint Committee on Food Equipment using the consensus process described by the American National Standards Institute. Suggestions for i
19、mprovement of this Standard are welcome. This Standard is maintained on a Continuous 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 International, Standards Department, P.O. Box 13014
20、0, Ann Arbor, Michigan 48113-0140, USA. 2 The 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 that has not been subjected to public r
21、eview or a consensus process. In addition, it does not contain requirements necessary for conformance to the Standard. This page is intentionally left blank. 1 2017 NSF NSF/ANSI 52 2017 NSF/ANSI Standard for Food Equipment Supplemental Flooring 1 General 1.1 Purpose This Standard establishes minimum
22、 public health and sanitation requirements for supplemental flooring. Included are requirements for cleanability and durability, and resistance to the use environment, microbiological growth, and vermin. 1.2 Scope Supplemental flooring covered by this Standard includes, but is not limited to, supple
23、mental flooring for use in food preparation, dry storage, and warewashing areas. Flooring components and materials 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 supplemental flooring design, pr
24、ovided that such design meets the minimum specifications described herein. 1.3 Alternate materials, design, and construction While specific materials, design, and construction may be stipulated in this Standard, flooring that incorporates alternate materials, design, or construction may be acceptabl
25、e when such flooring meets intent of the applicable requirements 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 foll
26、owing documents contain provisions that, through reference, constitute provisions of this NSF/ANSI Standard. At the time this Standard was balloted, the editions listed below were valid. All documents are subject to revision, and parties are encouraged to investigate the possibility of applying the
27、recent editions of the documents indicated below. The most recent published edition of the document shall be used for undated references. ASTM D256 2010. Standard Test Methods for Determining the Izod Pendulum Impact Resistance of Plastics3 ASTM D412-15. Standard Test Methods for Vulcanized Rubber a
28、nd Thermoplastic Elastomers Tension3 ASTM D624-00 (2012). Standard Test Method for Tear Strength of Conventional Vulcanized Rubber and Thermoplastic Elastomers3 3 ASTM International, 100 Barr Harbor Dr., West Conshohocken, PA 19428 . 2017 NSF NSF/ANSI 52 2017 2 ASTM D638-14. Standard Test Method for
29、 Tensile Properties of Plastics3 ASTM D792-13. Standard Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement3 ASTM G21-2015. Standard Practice for Determining Resistance of Synthetic Polymeric Materials to Fungi3 IEEE/ASTM SI 10 2010. American National Standar
30、d for Metric Practice3 NSF/ANSI 2. Food equipment NSF/ANSI 170. Glossary of food equipment terminology 3 Definitions Terms used in this Standard that have special technical meaning are defined in NSF/ANSI 170. 4 Materials 4.1 General Materials shall meet the following requirements and use environmen
31、t conditions. 4.2 Resistance to microorganisms Supplemental flooring materials shall be resistant to microbial action and shall not contribute to or support survival or growth of microorganisms when tested in accordance with 6.1. 4.3 Resistance to environment Materials shall be resistant to deterior
32、ation when tested in accordance with 6.2 and 6.3. 4.3.1 Absorption/adsorption Supplemental flooring shall not absorb or adsorb water or oil when tested in accordance with 6.2. 4.3.2 Temperature resistance Supplemental flooring shall not be detrimentally unstable at use and cleaning temperature range
33、s when tested in accordance with 6.3. 4.4 Tensile strength Supplemental flooring shall meet the appropriate performance test requirements of 6.4 for tensile strength and tear resistance. 4.5 Specific gravity Supplemental flooring shall meet the appropriate performance test requirements of 6.5 for sp
34、ecific gravity. 2017 NSF NSF/ANSI 52 2017 3 5 Design and construction 5.1 General Supplemental flooring shall be designed and manufactured to prevent the harborage of vermin and the accumulation of dust, dirt, splash, or spillage, and to facilitate maintenance, service, and cleaning. Supplemental fl
35、ooring shall be designed and manufactured so as not to buckle, curl, or warp during use or following cleaning performed in accordance with the manufacturers recommendations. 5.2 Cleanability Supplemental flooring shall be easily cleanable in the use position or when removed. Single pieces or interlo
36、cking parts shall be readily removable and shall not exceed 40 lb (18 kg) in weight. Flooring shall not exceed 25 ft2 (2.3 m2) in overall area, unless it can be rolled and easily carried by one person. 5.3 Self-draining Supplemental flooring shall be designed and manufactured to be self-draining thr
37、ough and beneath. The walking surface shall be designed and manufactured to prevent the accumulation of liquids. 5.4 Manufacturers instructions The manufacturer shall provide detailed guidelines for intended end uses and instructions for installation, cleaning, and maintenance with each order and sh
38、ipment. The manufacturers cleaning instructions shall not stipulate the use of spray-type warewashing machines, or warewashing or vegetable preparation sinks, as acceptable cleaning methods. 6 Performance 6.1 Resistance to microorganisms 6.1.1 Performance requirement Supplemental flooring materials
39、shall be resistant to microbial action and shall not contribute to or support survival or growth of microorganisms when tested in accordance with ASTM G213. 6.1.2 Test method ASTM G213 shall be used with the following modifications: Test material samples shall be 1 in (25 mm). Each sample type shall
40、 be tested with each organism. Bacillus subtilis ATCC 273284 and Aspergillus niger ATCC 96424 will be used to detect the possibility of growth. Incubation shall be at 20 to 30 C (82 to 86 F) and 85% humidity for 28 days. 6.1.3 Acceptance criteria There shall be no more than traces of growth (Rating
41、I) when the material is tested in accordance with item 8 of ASTM G213. 4 American Type Culture Collection (ATCC), 12301 Parklawn Drive, Rockville, MD 20852 . 2017 NSF NSF/ANSI 52 2017 4 6.2 Absorption / adsorption 6.2.1 Performance requirement Supplemental flooring shall be resistant to the absorpti
42、on or adsorption of water or oil. 6.2.2 Test method 6.2.2.1 Water resistance 6.2.2.1.1 General purpose flooring Three test samples measuring 2 in x 2 in (50 mm x 50 mm) shall be conditioned at 73 3 F (23 2 C) and 50% 5% relative humidity for a period of at least 24 h. The three samples shall each be
43、 separately weighed to the nearest 0.001 g. Test samples will then be exposed to a solution of tap water and household detergent. The test solution shall have a pH between 8 and 9, a detergent concentration of 0.3% 0.05%, and a temperature maintained at 100 2 F (38 1 C). Exposure shall be for a peri
44、od of 6 h. The solution shall be of sufficient volume to completely submerge all of the samples. Following the exposure, samples shall be pat-dried with a paper towel to remove excess water, and individually reweighed. 6.2.2.1.2 Heavy duty flooring Three test samples measuring 2 in x 2 in (50 mm x 5
45、0 mm) shall be conditioned at 73 3 F (23 2 C) and 50% 5% relative humidity for a period of at least 24 h. The three samples shall each be separately weighed to the nearest 0.001 g. Test samples will then be exposed to a solution of tap water and commercial detergent. The test solution shall have a p
46、H between 11 and 12, a detergent concentration of 0.3% 0.05%, and a temperature maintained at 150 2 F (66 1 C). Exposure shall be for a period of 24 h. The solution shall be of sufficient volume to completely submerge all of the samples. Following the exposure, samples shall be pat-dried with a pape
47、r towel to remove excess water, and individually reweighed. 6.2.2.2 Oil resistance 6.2.2.2.1 General purpose flooring Three test samples measuring 2 in x 2 in (50 mm x 50 mm) shall be conditioned at 73 3 F (23 2 C) and 50% 5% relative humidity for a period of at least 24 h. The three samples shall e
48、ach be separately weighed to the nearest 0.001 g. Test samples will then be exposed to preheated vegetable shortening maintained at 150 3 F (66 2 C). Exposure shall be for a period of 24 h. The vegetable shortening shall be of sufficient volume to completely submerge all of the samples. Following th
49、e exposure, samples shall be pat-dried with a paper towel to remove excess oil, and individually reweighed. 6.2.2.1.2 Heavy duty flooring Three test samples measuring 2 in x 2 in (50 mm x 50 mm) shall be conditioned at 73 3 F (23 2 C) and 50% 5% relative humidity for a period of at least 24 h. The three samples shall each be separately weighed to the nearest 0.001 g. Test samples will then be exposed to preheated vegetable shortening maintained at 150 3 F (66 2 C). Exposure shall be for a perio
