NSF 50-2015 Equipment for Swimming Pools Spas Hot Tubs and Other Recreational Water Facilities.pdf

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1、NSF International Standard / American National StandardNSF/ANSI 50 - 2015Equipment for Swimming Pools, Spas,Hot Tubs and Other Recreational Water FacilitiesNSF International, an independent, not-for-profit, non-governmental organization, is dedicated to being the leading global provider of public he

2、alth and safety-based risk management solutions while 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 inter-pretations, or propose revisions by contacting: Chair, J

3、oint Committee on Recreational Water Facilities c/o NSF International 789 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 50 2015 i NSF International Standard/ Americ

4、an National Standard Equipment for Swimming Pools, Spas, Hot Tubs and other Recreational Water Facilities Evaluation criteria for materials, components, products, equipment and systems for use at recreational water facilities Standard Developer NSF International Designated as an ANSI Standard Januar

5、y 26, 2015 American National Standards Institute ii Recommended for Adoption by The NSF Joint Committee on Recreational Water Facilities The NSF Council of Public Health Consultants Adopted by The NSF International May 1977 Revised May 1979 Revised June 1984 Revised November 1985 Revised May 1992 Re

6、vised July 1996 Revised January 2000 Revised May 2001 Revised March 2004 Revised October 2005 Revised April 2007 Revised October 2007 Revised February 2009Revised May 2009 Revised August 2010 Revised August 2011 Addendum November 2011 Revised September 2012 Revised December 2013 Revised June 2014 Re

7、vised July 2015 Published by NSF International P. O. Box 130140, Ann Arbor, Michigan 48113-0140, USA For ordering copies or for making inquiries with regard to this Standard, please reference the designation “NSF/ANSI 50 2015.” Copyright 2012 NSF International Previous editions 2014, 2013, 2011, 201

8、0, 2009, 2008, 2007, 2005, 2004, 2001, 2000, 1996, 1992, 1985, 1984, 1979 Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from NSF Internat

9、ional. 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 of the manufacturer or any other party. The opinions and findings of NSF represent its professional judgmen

10、t. NSF shall not be responsible to anyone for the use of or reliance up-on this Standard by anyone. NSF shall not incur any obligation or liability for damages, including consequential damages, arising out of or in connection with the use, interpretation of, or reliance upon this Standard. NSF Stand

11、ards provide basic criteria to promote sanitation and protection of the public health. 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 given

12、 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 adjacent s

13、tandard 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 ref

14、erenced, the annexes are not considered an integral part of NSF Standards. The annexes 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) and has no

15、t 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 neces-sary for conformance to the Standard. iv This page is intentiona

16、lly left blank. v Contents 1 General . 1 1.1 Scope . 1 1.2 Variations in design and operation. 1 1.3 Alternate materials 1 1.4 Standard review 1 1.5 Normative references 1 2 Definitions . 4 3 Swimming pool water contact materials and swimming pool treatment chemicals 12 3.1 Swimming pool water conta

17、ct materials . 12 3.2 Swimming pool treatment chemicals . 13 3.3 Corrosion resistance . 14 3.4 Dissimilar metals . 14 3.5 Insulating fittings . 14 3.6 Piping materials 14 4 Design and construction 15 4.1 Installation of piping, valves, and fittings 15 4.2 Assembly 15 4.3 Closing and sealing devices

18、15 4.4 Suction fittings 15 4.5 PVC Hose . 15 4.6 Safety Vacuum Release Systems (SVRS) . 15 4.7 Pool and Spa Covers 15 4.8 Pool Alarms 16 4.9 Barriers and fencing 16 4.10 Vacuum port fitting cover 16 5 Filters . 16 5.1 General . 16 5.2 Pre-coat media-type filters. 18 5.3 Sand-type filters 20 5.4 Cart

19、ridge-type and high-permeability-type filters 23 6 Centrifugal pumps . 25 6.1 General . 25 6.2 Hydrostatic pressure test . 25 6.3 Strainers . 25 6.4 Drain plugs . 26 6.5 Shaft seals 26 6.6 Pump performance curve 26 6.7 Operation and installation instructions . 26 6.8 Self-priming pumps . 26 6.9 Data

20、 plate . 26 6.10 Motors 27 7 Non-integral strainers 28 7.1 Non-integral strainer basket 28 7.2 Non-integral strainer cover 28 7.3 Drain plug . 28 7.4 Head loss 28 7.5 Hydrostatic pressure test . 29 7.6 Operation and installation instructions . 29 vi 7.7 Data plate . 29 8 Valves . 29 8.1 General . 29

21、 8.2 Positive indexing . 29 8.3 Design pressure 30 8.4 Pressure service . 30 8.5 Valve leakage . 30 8.6 Head loss curve 30 8.7 Waste port seal . 30 8.8 Vacuum service 30 8.9 Installation and operating instructions 31 8.10 Identification . 31 9 Recessed automatic surface skimmers 31 9.1 Housing 31 9.

22、2 Weir 31 9.3 Strainer basket 32 9.4 Equalizer line 32 9.5 Cover and mounting ring . 33 9.6 Trimmer valves . 33 9.7 Vacuum cleaner connections 34 9.8 Operation and installation instructions . 34 9.9 Data plate . 34 10 Mechanical chemical feeding equipment 34 10.1 General 35 10.2 Erosion resistance 3

23、5 10.3 Chemical resistance 35 10.4 Output rate . 35 10.5 Hydrostatic pressure . 36 10.6 Life test . 36 10.7 Shielding. 36 10.8 Motors 36 10.9 Suction lift . 36 10.10 Protection against overdosing . 36 10.11 Operation and installation instructions . 36 10.12 Data plate . 37 11 Flow-through chemical f

24、eeding equipment . 37 11.1 General 37 11.2 Chemical resistance 37 11.3 Hydrostatic pressure . 37 11.4 Motors 38 11.5 Output rate . 38 11.6 Protection against overdosing . 38 11.7 Flow-indicating device . 38 11.8 Operation and installation instructions . 38 11.9 Data plate . 39 12 Filtration media 39

25、 12.1 Pre-coat filter media 39 12.2 Sand and alternate sand-type filter media . 40 13 Ozone process equipment . 41 13.1 General 41 vii 13.2 Ozone components . 41 13.3 Ozone generator . 41 13.4 Injection methods 41 13.5 Gas flow meter . 42 13.6 Valve and component identification . 42 13.7 Cleanabilit

26、y . 42 13.8 Ozone resistant materials . 42 13.9 Compatible materials for operation 42 13.10 Design pressure (pressure vessels) 44 13.11 Head loss . 44 13.12 Water flow meter. 44 13.13 Oxidation-reduction potential (ORP) monitoring . 44 13.14 Warning devices . 44 13.15 Operational protection . 44 13.

27、16 Ozone destruct . 44 13.17 Ozone output 44 13.18 Life test . 45 13.19 Disinfection efficacy 45 13.20 Cryptosporidium reduction 45 13.21 Operation and installation instructions . 45 13.22 Information on ozone off-gassing and removal devices . 46 13.23 Data plate . 46 14 Ultraviolet (UV) light proce

28、ss equipment 47 14.1 General 47 14.2 Cleanability . 47 14.3 Design pressure (pressure vessels) 47 14.4 Flow meter 47 14.5 Performance indication . 47 14.6 Operation and installation instructions . 47 14.7 Data plate . 48 14.8 Disinfection efficacy 48 14.9 Valve and component identification . 49 14.1

29、0 Operating temperatures 49 14.11 Operational protection . 49 14.12 Life Test . 49 14.13 Cleaning . 49 14.14 Ultraviolet (UV) lamps . 50 14.15 Chemical resistant materials . 50 14.16 Head loss . 50 14.17 Hydrostatic Pressure Requirements 50 14.18 UV Cryptosporidium Inactivation and dose determinatio

30、n 50 15 In-line electrolytic chlorinator or brominator process equipment . 51 15.1 General 51 15.2 Cleanability . 51 15.3 Design pressure (pressure vessels) 51 15.4 Flow meter 51 15.5 Performance indication . 51 15.6 Operation and installation instructions . 51 15.7 Data plate . 52 15.8 Valve and co

31、mponent identification . 52 15.9 Operating temperatures and pressures . 52 15.10 Operational protection . 52 15.12 Chemical-resistant materials . 53 15.13 Output rate . 53 viii 15.14 Pressure requirements 53 15.15 Life test . 53 15.16 Salt level . 53 15.17 Head loss . 53 16 Brine (batch) type electr

32、olytic chlorine or bromine generators 53 16.1 General 53 16.2 Cleanability . 53 16.3 Design pressure (pressure vessels) 54 16.4 Flow meter 54 16.5 Performance indication . 54 16.6 Operation and installation instructions . 54 16.7 Data plate . 54 16.8 Valve and component identification . 55 16.9 Oper

33、ating conditions . 55 16.10 Injection methods 55 16.11 Operational protection . 55 16.12 Chemical-resistant materials . 55 16.13 Output rate . 55 16.14 Life test . 56 17 Copper/silver and copper ion generators . 56 17.1 General 56 17.2 Cleanability . 56 17.3 Design pressure (pressure vessels) 56 17.

34、4 Flow meter 56 17.5 Performance indication . 56 17.6 Operation and installation instructions . 57 17.7 Data plate . 57 17.8 Disinfection efficacy 58 17.9 Valve and component identification . 58 17.10 Operating temperatures and pressures . 58 17.11 Warning devices . 58 17.12 Chemical-resistant mater

35、ials . 58 17.13 Output rate . 59 17.14 Life test . 59 17.15 Uniformity of output . 59 18 Automated Controllers . 59 18.1 Scope . 59 18.2 Chemical resistant materials . 59 18.3 Monitor display . 59 18.4 Life test . 60 18.5 Performance . 60 18.6 Failure sensing and signaling devices . 61 18.7 Operatio

36、nal protection . 61 18.8 Operation and installation instructions . 61 18.9 Data plate . 61 19 Water Quality Testing Devices (WQTD) . 62 19.1 General 62 19.2 Testing . 62 19.3 Operation and use instructions 63 19.4 WQTD Marking/Identification 64 20 Spas and hot tubs . 64 ix 20.1 General 64 20.2 Mater

37、ials . 64 20.3 Electrical components . 65 20.4 Design and construction 65 20.5 Circulation system 67 20.6 Air blower and air induction systems . 71 20.7 Temperature control systems, heaters, and controls . 71 20.8 Sanitation and treatment systems . 72 20.9 Data plate . 73 21 Fittings for water-park,

38、 spray-pad, pool, or spa 75 21.1 Water inlet or water return fittings 75 21.2 Surface or deck drain fittings . 76 21.3 Overflow fittings and perimeter grating 78 21.4 Fittings for water circulation and treatment 78 22 Heat exchangers, heaters, coolers, and solar water heating systems . 79 22.1 Gener

39、al 79 22.2 Performance . 80 22.3 Operation and installation instructions . 80 22.4 Marking and product identification . 81 Annex A . A1 Annex B . B1 Annex C . C1 Annex D . D1 Annex E . E1 Annex F . F1 Annex G G1 Annex H . H1 Annex I I1 Annex J . J1 Annex K . K1 Annex L . L1 Annex M M1 Annex N . N1 A

40、nnex O O1 Annex P . P1 Annex Q Q1 x Annex R . R1 Interpretation Annex 1 xi Foreword2The purpose of this Standard is to establish minimum materials, design and construction, and performance requirements for components, products, equipment and systems, related to public and residential recreational wa

41、ter facility operation. If a value for measurement is followed by a value in other units in parenthesis, the second value may be only approximate. The first stated value is the requirement. In this edition of NSF/ANSI 50 the following revisions were incorporated: Issue 74 This issue addresses requir

42、ements for heat exchangers, heaters, coolers, and solar water heating systems. Issue 77 This issue addresses pump efficiency and pump performance in pools, spas, hot tubs and other water recreational facilities. Issue 91 This issue updates language in Section 1.5 Normative References, Section 3.2 Ma

43、terials, and Section 4.5 PVC hoses. Issue 100 This issue is a revision of section 3 Materials. Issue 107 This issue is an editorial revision of the entire standard. Suggestions for improvement of this Standard are welcome. This Standard is maintained on a Continuous Maintenance schedule and can be o

44、pened for comment at any time. Comments should be sent to Chair, Joint Committee on Recreational Water Facilities at standardsnsf.org. or c/o NSF International, Standards Department, PO Box 130140, Ann Arbor, MI 48113-0140, USA. 2The information contained in this Foreword is not part of this America

45、n 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 review or a consensus process. In addition, it does not contain requirements necessary for conformance to the Sta

46、ndard. xii This page is intentionally left blank.1 2015 NSF NSF/ANSI 50 2015 NSF/ANSI Standard Equipment for Swimming Pools, Spas, Hot Tubs and other Recreational Water Facilities Evaluation criteria for materials, components, products, equipment and systems for use at recreational water facilities

47、1 General 1.1 Scope This Standard covers materials, components, products, equipment and systems, related to public and residential recreational water facility operation. 1.2 Variations in design and operation A component varying in design and/or operation may qualify under this Standard. Appropriate

48、 tests and investigations shall indicate that the component performs as well as components conforming to this Standard. Such components shall meet the requirements for materials, finishes, and construction in this Standard. 1.3 Alternate materials If specific materials are mentioned, other materials

49、 equally satisfactory from the standpoint of public health may be permitted. 1.4 Standard review A complete review of this Standard shall be conducted at least every five years. These reviews shall be conducted by representatives from the industry, public health, and user groups, or agencies of the NSF Joint Committee on Recreational Water Facilities. 1.5 Normative references The following documents contain provisions that, through reference in this text, constitute provisions of this Standard. At the time of publication, the indicated editions were valid. Al