NSF 50-2016 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 - 2016Equipment 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 pro-vider of public h

2、ealth 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,

3、Joint 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 2016 i NSF International Standard/ Ameri

4、can 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 Febru

5、ary 19, 2016 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

6、Revised 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

7、Revised July 2015 Revised August 2016 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 2016.” Copyright 2012 NSF International Previous editions

8、 2015, 2014, 2013, 2011, 2010, 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

9、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 discharge any responsibility of the manufacturer or any other party. The opinions and findings of NSF repre

10、sent 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, arising out of or in connection with the use, interpretation of, or reliance u

11、pon this Standard. NSF Standards 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 St

12、andards. 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 un

13、derstanding 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 constr

14、uction. Unless otherwise referenced, 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.1 The information contained in this Disclaimer is not part of this American Natio

15、nal 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 Standard

16、. This page is intentionally 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

17、13 3.1 Swimming pool water contact materials . 13 3.2 Swimming pool treatment chemicals . 14 3.3 Corrosion resistance 15 3.4 Dissimilar metals 15 3.5 Insulating fittings 15 3.6 Piping materials 15 4 Design and construction . 16 4.1 Installation of piping, valves, and fittings 16 4.2 Assembly 16 4.3

18、Closing and sealing devices 16 4.4 Suction fittings 16 4.5 PVC Hose 16 4.6 Safety Vacuum Release Systems (SVRS) 16 4.7 Pool and Spa Covers . 16 4.8 Pool Alarms 16 4.9 Barriers and fencing . 17 4.10 Vacuum port fitting cover . 17 5 Filters . 17 5.1 General. 17 5.2 Pre-coat media-type filters . 18 5.3

19、 Sand-type filters . 21 5.4 Cartridge-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

20、6.8 Self-priming pumps 26 6.9 Data plate . 27 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 p

21、late . 29 8 Valves . 29 8.1 General. 29 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 30 8.10 Identification. 31 9 Recessed automatic s

22、urface skimmers 31 9.1 Housing 31 9.2 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 . 33 9.8 Operation and installation instructions . 34 9.9 Data plate . 34 10 Mechanical chemical feeding equipment . 34 1

23、0.1 General 34 10.2 Erosion resistance . 35 10.3 Chemical resistance 35 10.4 Output rate . 35 10.5 Hydrostatic pressure 35 10.6 Life test 35 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 plat

24、e 37 11 Flow-through chemical feeding equipment . 37 11.1 General 37 11.2 Chemical resistance 37 11.3 Hydrostatic pressure 37 11.4 Motors 37 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

25、39 12 Filtration media . 39 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. 41 13.6 Valve and component identification

26、 . 41 13.7 Cleanability 42 13.8 Ozone resistant materials 42 13.9 Compatible materials for operation . 42 13.10 Design pressure (pressure vessels) 43 13.11 Head loss . 43 13.12 Water flow meter . 43 13.13 Oxidation-reduction potential (ORP) monitoring 43 13.14 Warning devices 43 13.15 Operational pr

27、otection . 43 13.16 Ozone destruct 44 13.17 Ozone output . 44 13.18 Life test 44 13.19 Disinfection efficacy . 44 13.20 Cryptosporidium reduction . 44 13.21 Operation and installation instructions 45 13.22 Information on ozone off-gassing and removal devices 45 13.23 Data plate 45 14 Ultraviolet (UV

28、) light process equipment 46 14.1 General 46 14.2 Cleanability 46 14.3 Design pressure (pressure vessels) 46 14.4 Flow meter . 46 14.5 Performance indication 46 14.6 Operation and installation instructions 47 14.7 Data plate 47 14.8 Disinfection efficacy . 48 14.9 Valve and component identification

29、. 48 14.10 Operating temperatures . 48 14.11 Operational protection . 48 14.12 Life Test . 48 14.13 Cleaning . 49 14.14 Ultraviolet (UV) lamps 49 14.15 Chemical resistant materials . 49 14.16 Head loss . 49 14.17 Hydrostatic Pressure Requirements 49 14.18 UV Cryptosporidium Inactivation and dose det

30、ermination 49 15 In-line electrolytic chlorinator or brominator process equipment 50 15.1 General 50 15.2 Cleanability 50 15.3 Design pressure (pressure vessels) 50 15.4 Flow metering device . 50 15.5 Performance indication 51 15.6 Operation and installation instructions 51 15.7 Data plate 51 15.8 V

31、alve and component identification . 51 15.9 Operating temperatures and pressures . 52 15.10 Operational protection . 52 15.12 Chemical-resistant materials . 52 15.13 Output rate . 52 viii 15.14 Pressure requirements 52 15.15 Life test 52 15.16 Salt level 52 15.17 Head loss . 52 16 Brine (batch) type

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

33、 54 16.9 Operating conditions 54 16.10 Injection methods 54 16.11 Operational protection . 54 16.12 Chemical-resistant materials . 54 16.13 Output rate . 54 16.14 Life test 55 17 Copper/silver and copper ion generators . 55 17.1 General 55 17.2 Cleanability 55 17.3 Design pressure (pressure vessels)

34、 55 17.4 Flow metering device . 56 17.5 Performance indication 56 17.6 Operation and installation instructions 56 17.7 Data plate 57 17.8 Disinfection efficacy . 57 17.9 Valve and component identification . 57 17.10 Operating temperatures and pressures . 57 17.11 Warning devices 57 17.12 Chemical-re

35、sistant materials . 58 17.13 Output rate . 58 17.14 Life test 58 17.15 Uniformity of output . 58 17.16 Head Loss 58 18 Automated Controllers 58 18.1 Scope . 58 18.2 Chemical resistant materials . 58 18.3 Monitor display. 58 18.4 Life test 59 18.5 Performance 59 18.6 Failure sensing and signaling dev

36、ices . 60 18.7 Operational protection . 60 18.8 Operation and installation instructions 60 18.9 Data plate 60 19 Water Quality Testing Devices (WQTD) . 61 19.1 General 61 19.2 Testing . 61 19.3 Operation and use instructions 62 19.4 WQTD Marking/Identification . 62 ix 20 Spas and hot tubs . 63 20.1

37、General 63 20.2 Materials 63 20.3 Electrical components . 63 20.4 Design and construction 63 20.5 Circulation system . 66 20.6 Air blower and air induction systems . 69 20.7 Temperature control systems, heaters, and controls 70 20.8 Sanitation and treatment systems . 70 20.9 Data plate 72 20.10 Owne

38、rs manual . 72 21 Fittings for water-park, spray-pad, pool, or spa 74 21.1 Water inlet or water return fittings . 74 21.2 Surface or deck drain fittings . 75 21.3 Overflow fittings and perimeter grating 76 21.4 Fittings for water circulation and treatment . 77 22 Heat exchangers, heaters, coolers, a

39、nd solar water heating systems . 78 22.1 General 78 22.2 Performance 79 22.3 Operation and installation instructions 79 22.4 Marking and product identification . 80 23 Flow metering device 80 23.1 Scope . 80 23.2 Performance testing 80 23.3 Evaluation and testing criteria . 80 23.4 Design, construct

40、ion and performance requirements . 81 23.5 Fastener evaluation . 81 23.6 Working pressure and pressure testing . 81 23.7 Head loss . 82 23.8 Flow rate measurement accuracy . 82 23.9 Flow metering device testing and accuracy levels 82 23.10 Display flow rate scale range . 83 23.11 Display resolution

41、83 23.12 Life testing . 83 23.13 Product marking or data plate . 83 23.14 Installation and operation manual 84 Annex A . A1 Annex B . B1 Annex C .C1 Annex D .D1 Annex E . E1 Annex F . F1 Annex G G1 Annex H .H1 x Annex I I1 Annex J . J2 Annex K . K1 Annex L . L1 Annex M M1 Annex N .N1 Annex O O1 Anne

42、x P . P1 Annex Q Q1 Annex R .R1 Annex S . S1 Annex T . T1 Interpretation Annex . 1 xi Foreword2 The 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 rec

43、reational water 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 editorial revisions and the following issues were incorporated: Iss

44、ue 89 UV Systems and Alerting to incorporate updated language and requirements into section 14.5. Issue 92 Disinfection Efficacy to incorporate updated language and requirements for section 14.8 and Annex H. Issue 99 Flow metering device to add language for testing, performance, labeling, and materi

45、als for flow meters to NSF/ANSI 50. Issue 102 Ozone definitions to add definitions to support the ozone requirements in the Standard. Issue 112 Ozone Annex H to update Annex H in regards to ozone production testing requirements, by removing the requirement of recording dew point and O2 concentration

46、 of output of the air prep equipment. Issue 113 Annex F to update F.4.5 Acceptance criteria. Issue 114 Section 14 error to replace output with operational protection as a required post-life test as protection was included in previous version of the standard. Suggestions for improvement of this Stand

47、ard 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 Recreational Water Facilities at standardsnsf.org. or c/o NSF International, Standards Department, PO Box 130140, Ann Arbo

48、r, MI 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 review or a consen

49、sus process. In addition, it does not contain requirements necessary for conformance to the Standard. This page is intentionally left blank.1 2016 NSF NSF/ANSI 50 2016 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 1 General 1.1 Scope This Standard covers materials, components, products, equipment and systems, related to public and res-idential recreational water facilit