1、NSF International Standard / American National StandardNSF/ANSI 359 - 2018Valves 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: i NSF/ANSI 359 - 2018 NSF International Standard/ American National Standard for Plastics Valv
4、es for crosslinked polyethylene (PEX) water distribution tubing systems Standard Developer NSF International Designated as an ANSI Standard January 5, 2018 American National Standards Institute ii Prepared by The NSF Joint Committee Plastics Recommended for adoption by The NSF Council of Public Heal
5、th Consultants Adopted by NSF International June 2011 Revised August 2016 Revised May 2018 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 2018.”
6、 Copyright 2018 NSF International Previous editions 2016, 2011 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. Prin
7、ted in the United States of Americaiii 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 represent its professional judgment. NSF shall
8、 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 upon this Standard. NSF Standards provide
9、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 governmental agencies or other national standards-setting organizations provide safety requirements. Participation in NSF Standard
10、s 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 to the use of performance criteria measurable by examination or testing in NSF Standards development when such perf
11、ormance 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 standard requirements. However, the illustrations may not include all requirements for a specific product or unit, no
12、r 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 referenced, the Annexes are not considered an integral part of NSF Standards. The Annexes are provided as general guide
13、lines to the manufacturer, regulatory agency, user, or certifying organization. 1 The 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 mate
14、rial that has not been subjected to public review or consensus process. In addition, it does not contain requirements necessary for conformance to the Standard. 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 . 2 4
15、Material requirements . 3 5 Requirements . 3 5.1 Pressure rating . 3 5.2 Dimensional requirements of connections . 3 5.3 End connections (valves intended for joining PEX piping systems to systems other than PEX) 4 5.4 Performance requirements of valves . 4 6 Toxicity . 5 7 Marking requirements . 5 7
16、.1 Quality of marking 5 7.2 Valve marking 5 This page is intentionally left blank.vii Foreword2 The 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
17、for the protection of public health and 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 identifi
18、ed in ASTM F877 for PEX tubing systems. 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 resi
19、dential and commercial, hot and cold, potable water distribution systems as well as sealed central heating, including under-floor heating systems. This edition of the Standard contains the following revisions: Issue 3 Language regarding Cv values of valves was revised in 5.4.4. Issue 4 This revision
20、 allows materials not covered in ASTM F877 to be used if they meet the necessary requirements. This Standard was developed by the NSF Joint Committee on Plastics using the consensus process described by the American National Standards Institute. Suggestions for improvement of this Standard are welco
21、me. 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 Plastics at standardsnsf.org, or c/o NSF International, Standards Department, P.O. Box 130140, Ann Arbor, Michigan 48113-0140, USA. 2 T
22、he 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. As such, this Foreword may contain material that has not been subjected to public review or a consensus process. In addition, it
23、 does not contain requirements necessary for conformance to the Standard. This page is intentionally left blank.1 2018 NSF NSF/ANSI 359 2018 NSF/ANSI Standard for Plastics Valves for crosslinked polyethylene (PEX) water distribution tubing systems 1 General 1.1 Purpose This Standard establishes the
24、minimum physical and performance requirements for in-line valves used with cross-linked 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, a
25、nd hot and cold water cross linked polyethylene (PEX) distribution systems which are 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 F87
26、7 and identifies additional requirements specific for valves. This Standard covers 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 f
27、ixture fittings (faucets). 2 Normative references The following documents contain provisions 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
28、documents indicated below. ANSI/ISA-75.01.01 Flow Equations for Sizing Control Valves3ASME 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 Fittings
29、4ASTM B858 Standard Test Method for Ammonia Vapor Test for Determining Susceptibility to Stress Corrosion Cracking in Copper Alloys53 The International Society of Automation (ISA). 67 Alexander Drive, P.O. Box 12277, Research Triangle Park, NC 77091 . 4 American Society of Mechanical Engineers (ASME
30、). Three Park Avenue, New York, NY 10016-5990 . 5American Society for Testing Materials (ASTM). 100 Barr Harbor Drive, West Conshohoken, PA 19428-2959 . 2018 NSF NSF/ANSI 359 2018 2 ASTM D2846. Standard Specification for Chlorinated Poly(Vinyl Chloride) (CPVC) Plastic Hot and Cold Water Distribution
31、 Systems5ASTM D6394. Standard Specification for Sulfone Plastics (SP)5ASTM F877. Standard Specification for Crosslinked Polyethylene (PEX) Plastic Hot and Cold Water Distribution5ASTM F1498. Standard Specification for Taper Pipe Threads 60 for Thermoplastic Pipe and Fittings5ASTM F1807. Standard Spe
32、cification 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) Tubing5ASTM F1960. Standard Specification for
33、 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) Tubing5 ASTM F2080. Standard Specification for Cold-Expa
34、nsion 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 for Metal Insert Fittings Utilizing
35、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 Plastic Insert Fittings for SDR9 Cross-linked Polyethylene (PEX) and Polyethylene of Raised Temperatu
36、re (PE-RT) Tubing5 ASSE 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 Components Health Effects 3 Definitions Terms used in this Standard that have a specific techni
37、cal 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 measurement of the flow of a valve in imperial units The volume flow in
38、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). 6 American Society of Sanitary Engineering (ASSE) for Plumbing and Sanitary Research, 901 Canterbury Road, Suite A, Westlake, OH 44145-7201 . 2018 NSF NSF/ANSI 359 2018 3 3.3 fitting: A piping
39、 component used to join, terminate, or provide changes of direction in a piping system. 3.4 plastic: 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 proces
40、sing into finished articles, can be shaped by flow. 3.5 potable water: Water that is acceptable for 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 materia
41、l: A material in the form of pellets, granules, powder, floc, or liquid that has not been subjected 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 produ
42、cing valves which comply with the minimum requirements of this standard. 4.2 Valves shall be made of materials as specified in their respective applicable nationally recognized standards specification as mentioned in section 2 normative references. 4.3 Valves bodies made from copper alloys containin
43、g 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 (non-metal) materials for valves Materials for the valve body shall be produced from virgin plastics or clean
44、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 of this standard. Materials in the production of valves shall be manufactured in such a way as to prevent
45、contamination. 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 of connections Connections shall comply with at least one of the following standards: ASTM D2846. Standard Specification for Chlorinate
46、d Poly(Vinyl Chloride) (CPVC) Plastic Hot and Cold Water Distribution Systems5 ASTM F877. Standard Specification for Crosslinked Polyethylene (PEX) Plastic Hot and Cold Water Distribution5 ASTM F1807. Standard Specification for Metal Insert Fittings Utilizing a Copper Crimp Ring for SDR9 Cross-linke
47、d Polyethylene (PEX) Tubing5 2018 NSF NSF/ANSI 359 2018 4 ASTM F1865. Standard Specification for Mechanical Cold Expansion Insert Fitting with Compression Sleeve for Cross-linked Polyethylene (PEX) Tubing5 ASTM F1960. Standard Specification for Cold Expansion Fitting with PEX Reinforcing Rings for U
48、se with Cross-linked Polyethylene (PEX) Tubing5 ASTM F1961. Standard Specification for Metal Mechanical Cold Flare Compression Fittings with Disc Spring for Cross-linked Polyethylene (PEX) Tubing5 ASTM F2080. Standard Specification for Cold-Expansion Fittings with Metal Compression-Sleeves for Cross
49、-Linked Polyethylene (PEX) Pipe5 ASTM F2159. Standard Specification for Plastic Insert Fittings Utilizing a Copper Crimp Ring for SDR9 Cross-linked Polyethylene (PEX) Tubing5 ASTM 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 Plastic Insert Fittings for SDR9 Cross-linked Polyethylene (PEX) and Polyethylene of Rais
