1、NSF International Standard / American National StandardNSF/ANSI 52 - 2012 Supplemental 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 7
3、89 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 N
4、SF International NSF International Designated as an ANSI Standard August 8, 2012 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 Reaffirm
5、ed November 1984 Revised November 1992 Revised August 2003 Revised July 2005 Revised April 2007 Editorial revision May 2007 Revised February 2009 Revised August 2012 Published by NSF International PO Box 130140, Ann Arbor, Michigan 48113-0140, USA For ordering copies or for making inquiries with reg
6、ard to this Standard, please reference the designation “NSF/ANSI 52 2012.“ Copyright 2012 NSF International Previous editions 2009, 2007, 2005, 2003, 1992, 1978 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, ele
7、ctronic 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 responsibility
8、 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 consequential damages,
9、 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 because government
10、al 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. Preference is g
11、iven 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 understanding their adjace
12、nt 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. Unless otherwise
13、 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. 1The information contained in this Disclaimer is not part of this American National Standard (ANS) a
14、nd 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 Standard. iv This page is in
15、tentionally 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 Resistance to environment . 2 4.4 Tensi
16、le strength 2 4.5 Specific gravity . 3 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 resistance . 5 6.4 Tensile testing 6 6.5
17、 Specific gravity . 7 vi This page is intentionally blank. vii Foreword2NSF/ANSI 52 establishes minimum sanitation and food safety requirements for the materials, design, and manufacture of supplemental flooring intended for use in food preparation, dry storage, and warewashing areas. Issue 6 This r
18、evision updated the Normative References and boilerplate language in: 1.4 Measurement. NSF offers a certification program to NSF/ANSI 52. Products certified by NSF carry the NSF Mark, one of the most respected certification marks in the world. The NSF Mark on a product gives consumers and retailers
19、assurance that the product has been tested and meets the requirements of the Standard. For more information on the NSF certification program, please contact NSF International, P.O. Box 130140, Ann Arbor, Michigan 48113-0140 or at 734-769-8010. This Standard was developed by the NSF Joint Committee o
20、n Food Equipment using the NSF consensus process accredited by the American National Standards Institute. Suggestions for improvement of this Standard are welcome. Comments should be sent to the Chairperson, Joint Committee on Food Equipment at standardsnsf.org, or c/o NSF International, Standards D
21、epartment, P.O. Box 130140, Ann Arbor, MI 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 that has not been sub
22、jected to public review or a consensus process. In addition, it does not contain requirements necessary for conformance to the Standard. This page is intentionally blank. 1 2012 NSF NSF/ANSI 52 2012 NSF/ANSI Standard for For Food Equipment Supplemental flooring 1 General 1.1 Purpose This Standard es
23、tablishes minimum 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 l
24、imited to, supplemental 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 fl
25、ooring design, provided 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
26、 may be acceptable 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 re
27、ferences The following 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
28、 of applying the recent editions of the documents indicated below. The most recent published edition of the document shall be used for undated references. 21 C.F.R. Part 131, Milk and Cream (Food and Drug)3ASTM D256 2010. Standard Test Methods for Determining the Izod Pendulum Impact Resistance of P
29、lastics4 3 U. S. Government Printing Office, Washington, DC 20402 . 4ASTM International, 100 Barr Harbor Dr., West Conshohocken, PA 19428 . 2012 NSF NSF/ANSI 52 2012 2 ASTM D412-06ae2. Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers Tension4ASTM D624-00.(2007). Standard Test
30、 Method for Tear Strength of Conventional Vulcanized Rubber and Thermoplastic Elastomers4ASTM D638-10. Standard Test Method for Tensile Properties of Plastics4 ASTM D792-08. Standard Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement4 ASTM G21-2009. Standard
31、 Practice for Determining Resistance of Synthetic Polymeric Materials to Fungi4IEEE/ASTM SI 10 2010. American National Standard for Metric Practice4 NSF/ANSI 2. Food equipment NSF/ANSI 170. Glossary of food equipment terminology 3 Definitions Terms used in this Standard that have special technical m
32、eaning are defined in NSF/ANSI 170. 4 Materials 4.1 General Materials shall meet the following requirements and use environment conditions. 4.2 Resistance to microorganisms Supplemental flooring materials shall be resistant to microbial action and shall not contribute to or support survival or growt
33、h of microorganisms when tested in accordance with 6.1. 4.3 Resistance to environment Materials shall be resistant to deterioration 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
34、. 4.3.2 Temperature resistance Supplemental flooring shall not be detrimentally unstable at use and cleaning temperature ranges 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
35、 resistance. 2012 NSF NSF/ANSI 52 2012 3 4.5 Specific gravity Supplemental flooring shall meet the appropriate performance test requirements of 6.5 for specific gravity. 5 Design and construction 5.1 General Supplemental flooring shall be designed and manufactured to prevent the harborage of vermin
36、and the accumulation of dust, dirt, splash, or spillage, and to facilitate maintenance, service, and cleaning. Supplemental flooring 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.
37、5.2 Cleanability Supplemental flooring shall be easily cleanable in the use position or when removed. Single pieces or interlocking 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 eas
38、ily carried by one person. 5.3 Self-draining Supplemental flooring shall be designed and manufactured to be self-draining through and beneath. The walking surface shall be designed and manufactured to prevent the accumulation of liquids. 5.4 Manufacturers instructions The manufacturer shall provide
39、detailed guidelines for intended end uses and instructions for installation, cleaning, and maintenance with each order and shipment. The manufacturers cleaning instructions shall not stipulate the use of spray-type warewashing machines, or warewashing or vegetable preparation sinks, as acceptable cl
40、eaning methods. 6 Performance 6.1 Resistance to microorganisms 6.1.1 Performance requirement 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 ASTM G214. 6.1.2 Test method
41、ASTM G214shall be used with the following modifications: Test material samples shall be 1 in (25 mm). Each sample type shall be tested with each organism. Bacillus subtilis ATCC273285and Aspergillus niger ATCC 96425will be used to detect the possibility of growth. Incubation shall be at 20 to 30 C (
42、82 to 86 F) and 85% humidity for 28 days. 5 American Type Culture Collection (ATCC), 12301 Parklawn Drive, Rockville, MD 20852 . 2012 NSF NSF/ANSI 52 2012 4 6.1.3 Acceptance criteria There shall be no more than traces of growth (Rating I) when the material is tested in accordance with item 8 of ASTM
43、 G214. 6.2 Absorption/adsorption 6.2.1 Performance requirement Supplemental flooring shall be resistant to the absorption 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 con
44、ditioned 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 household detergent. The test solution shall have a pH between 8 and 9,
45、a detergent concentration of 0.3% 0.05%, and a temperature maintained at 100 2 F (38 1 C). Exposure shall be for a period 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 exce
46、ss water, 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.
47、Test samples will then be exposed to a solution of tap water and commercial detergent. The test solution shall have a pH 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 suff
48、icient 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. 6.2.2.2 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
49、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 period of 24 h. The vegetable shortening 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 oil, and individu
