1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 668 Hose Valves for Fire-Protection Service STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERI
2、AL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Hose Valves for Fire-Protection Service, UL 668 Tenth Edition, Dated April 28, 2004 Summary of Topics This revision to ANSI/UL 668 was issued to incorporate the following changes: To allo
3、w for grooved inlets and alternative thread types where the valve is used in areas specifying different threading The revised requirements are substantially in accordance with Proposal(s) on this subject dated May 27, 2016. Text that has been changed in any manner or impacted by ULs electronic publi
4、shing system is marked with a vertical line in the margin. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provid
5、es this Standard as is without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, including loss of
6、 prots, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for th
7、is Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or
8、deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. JULY 12, 2016 UL 668 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 12, 2016 UL 668 tr2 No Text on This PageUL COPYRIGHTED MAT
9、ERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APRIL 28, 2004 (Title Page Reprinted: July 12, 2016) 1 UL 668 Standard for Hose Valves for Fire-Protection Service First Edition 1921 Second Edition 1937 Third Edition June, 1958 Fourth Edition April, 1967 Fifth
10、 Edition June, 1970 Sixth Edition January, 1978 Seventh Edition July, 1980 Eighth Edition August, 1989 Ninth Edition December, 1995 Tenth Edition April 28, 2004 This ANSI/UL Standard for Safety consists of the Tenth edition including revisions through July 12, 2016. The most recent designation of AN
11、SI/UL 668 as an American National Standard (ANSI) occurred on July 12, 2016. ANSI approval for a standard does not include the Cover Page, Transmittal Pages and Title Page. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitt
12、ed via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights rega
13、rding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2016 UNDERWRITERS LABORATORIES INC. ANSI/UL 668-2016UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 12, 2016 HOSE VALVES FOR FIRE-PROTECTION SERVICE - U
14、L 668 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 Components 5 3 Units of Measurement .5 4 Undated References 6 CONSTRUCTION 5 Sizes 6 6 Working Pressure .7 7 Materials .7 8 Castin
15、gs .7 9 Direction to Open .7 10 Metallic Seat Rings 7 11 Inlets and Attachment Means 7 12 Outlet Nipples and Threads .8 13 Hose Outlet Caps 8 14 Valve Stems .8A 15 Stuffing Boxes and Seals .9 16 Handwheels .9 17 Angle Pattern Valves 10 18 Straightway Pattern Valves 13 PERFORMANCE 19 General 14 20 10
16、-Day Moist Ammonia Air Stress Cracking Test .14 21 Elastomeric Parts Test 15 22 Hydraulic Operation Test 15 23 Leakage Tests .16 23.1 General .16 23.2 Seat leakage 16 23.3 Body leakage 16 23.4 Repacking test .17 23.5 Body and stem leakage .17 24 Strength of Body Test .17 25 Mechanical Strength Test
17、17 25.1 Internal and external valve parts .17 MANUFACTURING AND PRODUCTION TESTS 26 General 18 MARKING 27 General 19 JULY 12, 2016 HOSE VALVES FOR FIRE-PROTECTION SERVICE - UL 668 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APPENDIX A S
18、tandards for ComponentsA1 APRIL 28, 2004 HOSE VALVES FOR FIRE-PROTECTION SERVICE - UL 668 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover angle-pattern and straightway-pattern hose valves in
19、tended for use on standpipes, re pumps, and hydrants supplying water for re protection service. 1.2 Requirements for the installation of hose valves include the Standards of the National Fire Protection Association for the Installation of Sprinkler Systems, NFPA 13; for Standpipe, Private Hydrants,
20、and Hose Systems, NFPA 14; for Installation of Stationary Fire Pumps for Fire Protection, NFPA 20; and for Installation of Private Fire Service Mains and Their Appurtenances, NFPA 24. 2 Components 2.1 Except as indicated in 2.2, a component of a product covered by this standard shall comply with the
21、 requirements for that component. See Appendix A for a list of standards covering components generally used in the products covered by this standard. 2.2 A component is not required to comply with a specic requirement that: a) Involves a feature or characteristic not required in the application of t
22、he component in the product covered by this standard, or b) Is superseded by a requirement in this standard. 2.3 A component shall be used in accordance with its rating established for the intended conditions of use. 2.4 Specic components are incomplete in construction features or restricted in perf
23、ormance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specied limits, and shall be used only under those specic conditions. 3 Units of Measurement 3.1 Values stated without parentheses are the requirement. Values in paren
24、theses are explanatory or approximate information. APRIL 28, 2004 HOSE VALVES FOR FIRE-PROTECTION SERVICE - UL 668 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4 Undated References 4.1 Any undated reference to a code or standard appearin
25、g in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. CONSTRUCTION 5 Sizes 5.1 Hose valves covered by these requirements include the following patterns and opening sizes as designated in nominal inches (see Table 5.1): a) Angle (90-D
26、egree) Pattern For use on standpipes having inlet and outlet openings of the same size or with the inlet larger than the outlet. Openings are to be of the 1, 1-1/2, 2-1/2, or 3 inch nominal size; b) Angle (90- and 120-Degree) Pattern For use on wet-pipe sprinkler equipment having 1 inch nominal inle
27、ts and 1-1/2 inch nominal outlets; c) Straightway Pattern For use on re pumps and hydrants having inlet and outlet openings of the same nominal 2-1/2 inch size; and d) Straightway Pattern For use on standpipes having inlet and outlet openings of the same size or with the inlet larger than the outlet
28、. Openings are to be of the 1, 1-1/2, 2-1/2, or 3 inch nominal size. Table 5.1 Nominal pipe size dimensions Nominal size Outside diameter Inches Inches (mm) 1 1.315 (33.40) 1-1/2 1.900 (48.26) 2-1/2 2.875 (73.03) 3 3.500 (88.90) APRIL 28, 2004 HOSE VALVES FOR FIRE-PROTECTION SERVICE - UL 668 6UL COP
29、YRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6 Working Pressure 6.1 A hose valve shall be constructed for a minimum working pressure of 175 psi (1.21 MPa). 7 Materials 7.1 A hose valve intended for use on standpipes and re pumps shall be made e
30、ntirely of brass or bronze, or other material having equivalent corrosion resistant properties, except for the handwheel (see 7.3) and for the valve seal (see 17.6) of an angle pattern valve. 7.2 A straightway pattern hose valve intended for use on hydrants, and for assembly thereto by bolting the v
31、alve to the outside of the hydrant barrel at the hose outlets, shall be permitted to have a cast iron body and a bonnet intended to be bolted together. The remaining valve parts shall be made of brass, bronze, or other material having equivalent corrosion resistant properties, except for the handwhe
32、el. 7.3 A handwheel shall be made of material equivalent in strength to malleable iron. 8 Castings 8.1 A casting shall be smooth, free from scale, lumps, cracks, blisters, sand holes, and defects that impairs its intended use. A casting shall not be plugged or lled; however, impregnation to remove p
33、orosity is permissible. 9 Direction to Open 9.1 A hose valve shall open by turning the handwheel to the left (counterclockwise) as viewed from the top, except when specically ordered otherwise to t existing equipment. 10 Metallic Seat Rings 10.1 The seat ring shall be made of brass, bronze, or other
34、 equivalent corrosion resistant material. 11 Inlets and Attachment Means 11.1 A hose valve intended for use on a re pump and a standpipe shall be tted at the inlet end with one of the following: a) Female pipe threads complying with ANSI/ASME B1.20.1, Pipe Threads, General Purpose (Inch); b) Grooved
35、 ends complying with the ANSI/AWWA C606, Standard for Grooved and Shouldered Joints; c) Female pipe threads complying with a national standard that applies where the valve is intended to be installed; d) Female screw threads complying with the Standard for Fire Hose Connections, NFPA 1963; or e) Fem
36、ale screw threads to t existing equipment complying with the specication where the valve is intended to be installed. JULY 12, 2016 HOSE VALVES FOR FIRE-PROTECTION SERVICE - UL 668 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 11.1.1 When
37、 the inlet end is tted with female screw threads, the threads are permitted to be integral with the valve body or located within a coupling that is able to swivel with respect to the body. 11.2 A hydrant hose valve shall be constructed to attach to hydrant barrels by use of two 3/4 inch (19.1 mm) ta
38、p bolts, spaced horizontally 5-5/8 inches (143 mm) on centers or by use of a ange complying with a national standard that applies where the valve is to be installed. 12 Outlet Nipples and Threads 12.1 A hose valve outlet shall be threaded in accordance with Standard for Fire Hose Connections, NFPA 1
39、963, unless otherwise specically ordered to t existing equipment or to comply with a specication where the valve is intended to be installed. The outlet end shall be provided with at least four full threads. 12.2 The outer end of external (male) and internal (female) threads other than taper pipe th
40、reads ANSI/ASME B1.20.1, Pipe Threads, General Purpose (Inch) shall be terminated by the Higbee Cut to facilitate coupling and to avoid crossing and mutilation of thread. 12.3 A hose nipple shall be made of brass, bronze, or other equivalent corrosion resistant material. 13 Hose Outlet Caps 13.1 A h
41、ose outlet cap shall be provided for a straightway pattern hose valve intended for use on hydrants. 13.2 A hose outlet cap shall be made of cast iron or equivalent corrosion resistant material. 13.3 A cap gasket complying with the dimensional specications in the Standard for Fire Hose Connections, N
42、FPA 1963, shall be provided with each hose outlet cap. 13.4 The cap nut on a hydrant hose valve shall have dimensions corresponding to those of the operating nuts on hydrants on which the hose valve is to be installed. 13.5 A gasket recess complying with the dimensional specications in the Standard
43、for Fire Hose Connections, NFPA 1963, shall be provided in the cap at the inner end of the threads. 13.6 A hose outlet cap shall be constructed to accommodate a swivel attachment for the chain used to secure the cap to a hydrant or hose valve on which it is used. JULY 12, 2016 HOSE VALVES FOR FIRE-P
44、ROTECTION SERVICE - UL 668 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 14 Valve Stems 14.1 Stem threads shall be Acme, modied Acme, half V, or square type. 14.2 The assembly of the stem and its attached parts shall be such that the part
45、s cannot separate in use. See Hydraulic Operation Test, Section 22, and Mechanical Strength Test, Section 25. JULY 12, 2016 HOSE VALVES FOR FIRE-PROTECTION SERVICE - UL 668 8AUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 12, 2016 HOSE
46、 VALVES FOR FIRE-PROTECTION SERVICE - UL 668 8B No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 15 Stuffing Boxes and Seals 15.1 A valve shall include a stuffing box, or other means for sealing, so that there shall be no
47、leakage at the valve stem. The bearing surface provided in a stuffing box gland or seal retainer for the stem shall be made of material having corrosion resistance equivalent to brass or bronze. 15.2 A stuffing box shall include a gland or follower with a packing nut. There shall be no threads withi
48、n the stuffing box. 15.3 The stuffing box shall be of a width to contain packing so that there is no leakage around the stem and shall have the space required for entrance of packing removal tools. 15.4 The stuffing box bottom and the end of the gland shall be beveled. 15.5 A valve shall be construc
49、ted to permit repacking of the stuffing box or replacement of at least one seal ring when the valve is fully open and under rated working pressure. A stem seal using formed rubber rings shall include at least two rings and stem seals using O rings shall include at least one ring. 15.6 In a cast iron valve, the entire stuffing box shall be made of brass or bronze, and the stem opening through the bonnet shall be brass or bronze bushed. 16 Handwheels 16.1 The outside diameter of a
