1、NSF International Standard / American National StandardNSF/ANSI 359 - 2011Valves for Crosslinked Polyethylene (PEX) Water Distribution Tubing SystemsNSF International, an independent, not-for-profit, non-governmental organization, is dedicated to being the leading global provider of public health an
2、d 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 interpretations, or propose revisions by contacting: Chair, Joint Com
3、mittee on Plastics c/o NSF International 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 i NSF International Standard/ American National Standard for Plastics Valve
4、s for crosslinked polyethylene (PEX) water distribution tubing systems Standard Developer NSF International NSF International Designated as an ANSI Standard June 24, 2011 American National Standards Institute ii Prepared by The NSF Joint Committee on Plastics Recommended for adoption by The NSF Coun
5、cil of Public Health Consultants Adopted by NSF International June 2011 Published by NSF International PO 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 359 2011.” Copyright 2011 NSF
6、 International 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 International. Printed in the United States of America. iii Disclai
7、mers1NSF, 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 judgment. NSF shall not be responsible to anyone for the use of or
8、 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 upon this Standard. NSF Standards provide basic criteria to promote sanitation and protec
9、tion of the public health. Provisions for mechanical and electrical safety have not been included in this Standard because governmental agencies or other national standards-setting organizations provide safety requirements. Participation in NSF Standards development activities by regulatory agency r
10、epresentatives (federal, local, state) shall not constitute their agencys endorsement of NSF or any of its 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
11、 of design, materials, or construction criteria. The illustrations, if provided, are intended to assist in 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 s
12、uch arrangements. Such partial drawings shall not be used to justify improper or incomplete design and construction. 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, u
13、ser, or certifying organization. 1The information contained in this Disclaimer is not part of this American 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 revie
14、w or a consensus process. In addition, it does not contain requirements necessary for conformance to the Standard. iv This page is intentionally left blank. v Contents 1 General . 1 1.1 Purpose 1 1.2 Scope . 1 2 Normative references . 1 3 Definitions . 3 4 Material requirements . 3 5 Requirements .
15、4 5.1 Pressure rating . 4 5.2 Dimensional requirements of connections . 4 5.3 End connections (valves intended for joining PEX piping systems to systems other than PEX) 4 5.4 Performance requirements of valves . 5 6 Toxicity . 5 7 Marking requirements . 6 7.1 Quality of marking 6 7.2 Valve marking 6
16、 vi This page is intentionally left blank. vii Foreword2The purpose of this Standard is to establish minimum physical and performance requirements for valves for crosslinked polyethylene (PEX) water distribution tubing systems. These criteria were established for the protection of public health and
17、the environment. The physical and performance requirements in this standard apply to in line-valves for use in radiant heating system and hot and cold water cross linked polyethylene (PEX) distribution systems which are compliant with the requirements identified in ASTM F877 for PEX tubing systems.
18、Valves meeting these requirements are rated for a minimum 100 psi at 180 F. This standard is supplemental to ASTM F877 and is intended to identify additional requirements specific for valves. The components covered by this standard are intended for use in residential and commercial, hot and cold, po
19、table water distribution systems as well as sealed central heating, including under-floor heating systems. This Standard was developed by the task group within the NSF Joint Committee on Plastics using the consensus process described in NSF Standards Development Policies and accredited by ANSI. Sugg
20、estions for improvement of this Standard are welcome. Comments should be sent to Chair, Joint Committee on Plastics, c/o NSF International, Standards Department, PO Box 130140, Ann Arbor, Michigan 48113-0140, USA. 2The information contained in this Foreword is not part of this American National Stan
21、dard (ANS) and has not been processed in accordance with ANSIs requirements for an ANS. As such, 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 Standard. This page
22、is intentionally left blank. 1 NSF/ANSI 359 2011 2011 NSF NSF/ANSI Standard for Plastics Valves for crosslinked polyethylene (PEX) water distribution tubing systems 1 General 1.1 Purpose This Standard establishes the minimum physical and performance requirements for in-line valves used with cross-li
23、nked polyethylene (PEX) systems. Establishment of these criteria provide for the protection of public health and the environment. 1.2 Scope This Standard applies to in line-valves for use in radiant heating systems, and hot and cold water cross linked polyethylene (PEX) distribution systems which ar
24、e compliant with the requirements identified in ASTM F877 for PEX tubing systems. Valves meeting these requirements are rated for a minimum 100 psi (0.69 MPa) at 180 F (82 C). This Standard is supplemental to ASTM F877 and identifies additional requirements specific for valves. This Standard covers
25、components intended for use in residential and commercial, hot and cold, potable water distribution systems; and sealed central heating, including under-floor heating systems. This Standard excludes supply stops and fixture fittings (faucets). 2 Normative references The following documents contain p
26、rovisions that, through reference, constitute requirements of this NSF Standard. All documents are subject to revision, and parties are encouraged to investigate the possibility of applying the recent editions of the documents indicated below. ANSI/ISA-75.01.01 Flow Equations for Sizing Control Valv
27、es3ASME A112.14.4 Manually Operated, Quarter-Turn Shutoff Valves for Use in Plumbing Systems4 ASME B1.20.1 Pipe Threads, General Purpose, Inch4ASME B16.22 Wrought Copper and Copper Alloy Solder Joint Pressure Fittings4 3 The International Society of Automation (ISA), 67 Alexander Drive, P.O. Box 122
28、77, Research Triangle Park, NC 7709 . 4 American Society of Mechanical Engineers (ASME), Three Park Avenue, New York, NY 10016-5990 . 2011 NSF NSF/ANSI 359 2011 2 ASTM B858 Standard Test Method for Ammonia Vapor Test for Determining Susceptibility to Stress Corrosion Cracking in Copper Alloys5ASTM D
29、2846 Standard Specification for Chlorinated Poly(Vinyl Chloride) (CPVC) Plastic Hot and Cold Water Distribution Systems5ASTM D6394 Standard Specification for Sulfone Plastics (SP)5ASTM F877 Standard Specification for Crosslinked Polyethylene (PEX) Plastic Hot and Cold Water Distribution5ASTM F1498 S
30、tandard Specification for Taper Pipe Threads 60 for Thermoplastic Pipe and Fittings5ASTM F1807 Standard Specification for Metal Insert Fittings Utilizing a Copper Crimp Ring for SDR9 Cross-linked Polyethylene (PEX) Tubing5ASTM F1865 Standard Specification for Mechanical Cold Expansion Insert Fitting
31、 With Compression Sleeve for Cross-linked Polyethylene (PEX) Tubing5ASTM F1960 Standard Specification for Cold Expansion Fitting with PEX Reinforcing Rings for Use with Cross-linked Polyethylene (PEX) Tubing5ASTM F1961 Standard Specification for Metal Mechanical Cold Flare Compression Fittings with
32、Disc Spring for Cross-linked Polyethylene (PEX) Tubing5ASTM F2080 Standard Specification for Cold-Expansion Fittings With Metal Compression-Sleeves for Cross-Linked Polyethylene (PEX) Pipe5ASTM F2159 Standard Specification for Plastic Insert Fittings Utilizing a Copper Crimp Ring for SDR9 Cross-link
33、ed Polyethylene (PEX) Tubing5ASTM F2434 Standard Specification for Metal Insert Fittings Utilizing a Copper Crimp Ring for SDR 9 cross-linked Polyethylene (PEX) Tubing and SDR9 Cross-linked Polyethylene/Aluminum/Cross-linked Polyethylene (PEX-AL-PEX) Tubing5 ASTM F2735 Standard Specification for Pla
34、stic Insert Fittings for SDR9 Cross-linked Polyethylene (PEX) and Polyethylene of Raised Temperature (PE-RT) Tubing5ASSE 1061 Performance Requirements for Removable and Non-Removable Push-Fittings6NSF/ANSI 14 Plastic Piping System Components and Related Materials NSF/ANSI 61 Drinking Water Systems C
35、omponents Health Effects 5 American Society for Testing Materials (ASTM) 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 . 6 American Society of Sanitary Engineering (ASSE) for Plumbing and Sanitary Research, 901 Canterbury Road, Suite A, Westlake, OH 44145-7201 . 2011 NSF NSF/ANSI 359 2011
36、3 3 Definitions Terms used in this Standard that have a specific technical meaning are defined here. 3.1 critical dimensions: Dimensions of a product (e.g., pipes and fittings) that directly affect the fit and function, or the capacity of making a sound joint, or both. 3.2 CV: Flow Coefficient The m
37、easurement of the flow of a valve in imperial units The volume flow in US gallons per minute of water at 60 F (15.5 C) with a pressure drop across the valve of 1 psi (0.007 MPa). 3.3 fitting: A piping component used to join, terminate, or provide changes of direction in a piping system. 3.4 plastic:
38、 A material that contains as an essential ingredient one or more organic polymeric substances of large molecular weight, is solid in its finished state, and, at some stage in its manufacture or processing into finished articles, can be shaped by flow. 3.5 potable water: Water that is acceptable for
39、drinking, culinary, and domestic purposes and meets the requirements of the health authority having jurisdiction. 3.6 valve: A device used to regulate the flow of liquids or gasses. 3.7 virgin material: A material in the form of pellets, granules, powder, floc, or liquid that has not been subjected
40、to use or processing other than that required for its initial manufacture. 4 Material requirements 4.1 Materials identified below and that meet the minimum requirements are acceptable for use in producing valves which comply with the minimum requirements of this standard. 4.2 Materials used to manuf
41、acture valves shall meet the requirements of ASTM F877. 4.3 Valves bodies made from copper alloys containing more than 15% zinc by weight and intended for use in potable water systems shall meet the Dezincification and Stress Corrosion Cracking Resistance requirements of NSF/ANSI 14. 4.4 Plastic (no
42、n-metal) materials for valves Materials for the valve body shall be produced from virgin plastics or clean rework materials. The use of clean, rework material of the same formulation and physical properties from the same manufacturer is acceptable provided the finished products meet the requirements
43、 of this standard. Materials in the production of valves shall be manufactured in such a way as to prevent contamination. 2011 NSF NSF/ANSI 359 2011 4 5 Requirements 5.1 Pressure rating Valves shall have a hydrostatic pressure rating of 100 psi (0.69 MPa) at 180F (82 C). 5.2 Dimensional requirements
44、 of connections Connections shall comply with at least one of the following standards: ASTM D2846 Standard Specification for Chlorinated Poly(Vinyl Chloride) (CPVC) Plastic Hot and Cold Water Distribution Systems5ASTM F877 Standard Specification for Crosslinked Polyethylene (PEX) Plastic Hot and Col
45、d Water Distribution5ASTM F1807 Standard Specification for Metal Insert Fittings Utilizing a Copper Crimp Ring for SDR9 Cross-linked Polyethylene (PEX) Tubing5ASTM F1865 Standard Specification for Mechanical Cold Expansion Insert Fitting with Compression Sleeve for Cross-linked Polyethylene (PEX) Tu
46、bing5ASTM F1960 Standard Specification for Cold Expansion Fitting with PEX Reinforcing Rings for Use with Cross-linked Polyethylene (PEX) Tubing5ASTM F1961 Standard Specification for Metal Mechanical Cold Flare Compression Fittings with Disc Spring for Cross-linked Polyethylene (PEX) Tubing5ASTM F20
47、80 Standard Specification for Cold-Expansion Fittings with Metal Compression-Sleeves for Cross-Linked Polyethylene (PEX) Pipe5ASTM F2159 Standard Specification for Plastic Insert Fittings Utilizing a Copper Crimp Ring for SDR9 Cross-linked Polyethylene (PEX) Tubing5 ASTM F2434 Standard Specification
48、 for Metal Insert Fittings Utilizing a Copper Crimp Ring for SDR 9 cross-linked Polyethylene (PEX) Tubing and SDR9 Cross-linked Polyethylene/Aluminum/Cross-linked Polyethylene (PEX-AL-PEX) Tubing5ASTM F2735 Standard Specification for Plastic Insert Fittings for SDR9 Cross-linked Polyethylene (PEX) a
49、nd Polyethylene of Raised Temperature (PE-RT) Tubing5ASSE 1061 Performance Requirements for Removable and Non-Removable Push-Fittings65.3 End connections (valves intended for joining PEX piping systems to systems other than PEX) 5.3.1 Threads Tapered metal threads shall meet the requirements of ASME B1.20.14. Tapered plastic threads shall meet the requirements of ASTM F14985. Non-tapered threads shall meet the requirements of ASME A112.18.14. 2011 NSF NSF/ANSI 359 2011 5 5.3.2 Sweat ends Sweat ends shall meet t
