1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 668 Hose Valves for Fire-Protection ServiceUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FO
2、R 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 of ANSI/UL 668 is being issued to reect the reaffirmation of ANSI approval. No changes in r
3、equirements have been made. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. Changes in requirements are marked with a vertical line in the margin and are followed by an effective date note indicating the date of p
4、ublication or the date on which the changed requirement becomes effective. The revisions dated December 18, 2012 include a reprinted title page (page 1) for this standard. The requirements are substantially in accordance with Proposal(s) on this subject dated October 26, 2012. All rights reserved. N
5、o 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 provides this Standard as is without warranty of any kind, either expressed or implied,
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7、f 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 this Standard, regardless of the form of the claim. Users of the electronic version
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9、chasers computer system. The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, gures, and/or other elements of the Standard having future effective dates as indicated in the note following the affected item. The prior text for requirements that have been
10、 revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. DECEMBER 18, 2012 UL 668 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 18, 2012 UL 668 tr2 No
11、Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APRIL 28, 2004 (Title Page Reprinted: December 18, 2012) 1 UL 668 Standard for Hose Valves for Fire-Protection Service First Edition 1921 Second Edition 1937 Third Edition June
12、, 1958 Fourth Edition April, 1967 Fifth 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 December
13、18, 2012. The most recent designation of ANSI/UL 668 as a Reaffirmed American National Standard (ANS) occurred on December 18, 2012. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective date information. Comments or proposals for revisions on any
14、part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. COPYRIGHT 2012 UNDERWRITERS LABORATORIES INC. ANSI/UL 668-2004 (R2012)UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR F
15、URTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APRIL 28, 2004 HOSE VALVES FOR FIRE-PROTECTION SERVICE - UL 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 Component
16、s 5 3 Units of Measurement .5 4 Undated References 6 CONSTRUCTION 5 Sizes 6 6 Working Pressure .7 7 Materials .7 8 Castings .7 9 Direction to Open .7 10 Metallic Seat Rings 7 11 Inlet Threads and Attachment Means .7 12 Outlet Nipples and Threads .8 13 Hose Outlet Caps 8 14 Valve Stems 8 15 Stuffing
17、Boxes and Seals .9 16 Handwheels .9 17 Angle Pattern Valves 10 18 Straightway Pattern Valves 13 PERFORMANCE 19 General 14 20 10-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 B
18、ody 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 25.1 Internal and external valve parts .17 MANUFACTURING AND PRODUCTION TESTS 26 General 18 MARKING 27 General 19 APRIL 28, 2004 HOSE VALVES FOR FIRE-PROTECTION SERVICE -
19、 UL 668 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APPENDIX A Standards for ComponentsA1 APRIL 28, 2004 HOSE VALVES FOR FIRE-PROTECTION SERVICE - UL 668 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION W
20、ITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover angle-pattern and straightway-pattern hose valves intended 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 o
21、f the National Fire Protection Association for the Installation of Sprinkler Systems, NFPA 13; for Standpipe, Private Hydrants, 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 Appurtenance
22、s, 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 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
23、 required to comply with a specic requirement that: a) Involves a feature or characteristic not required in the application of the 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 est
24、ablished for the intended conditions of use. 2.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specied limits, and shall be used only
25、under those specic conditions. 3 Units of Measurement 3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. APRIL 28, 2004 HOSE VALVES FOR FIRE-PROTECTION SERVICE - UL 668 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRO
26、DUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4 Undated References 4.1 Any undated reference to a code or standard appearing 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 the
27、se requirements include the following patterns and opening sizes as designated in nominal inches (see Table 5.1): a) Angle (90-Degree) 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,
28、or 3 inch nominal size; b) Angle (90- and 120-Degree) Pattern For use on wet-pipe sprinkler equipment having 1 inch nominal inlets 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) Stra
29、ightway 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. Table 5.1 Nominal pipe size dimensions Nominal size Outside diameter Inches Inches (mm) 1 1.315 (33.40)
30、 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 COPYRIGHTED 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
31、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 entirely 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 a
32、ngle pattern valve. 7.2 A straightway pattern hose valve intended for use on hydrants, and for assembly thereto by bolting the valve 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
33、parts shall be made of brass, bronze, or other material having equivalent corrosion resistant properties, except for the handwheel. 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,
34、sand holes, and defects that impairs its intended use. A casting shall not be plugged or lled; however, impregnation to remove porosity 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 specical
35、ly ordered otherwise to t existing equipment. 10 Metallic Seat Rings 10.1 The seat ring shall be made of brass, bronze, or other equivalent corrosion resistant material. 11 Inlet Threads and Attachment Means 11.1 A hose valve intended for use on a re pump and a standpipe shall be tted at the inlet e
36、nd with female pipe threads ANSI/ASME B1.20.1, Pipe Threads, General Purpose (Inch). 11.2 A hydrant hose valve shall be constructed to attach to hydrant barrels by use of two 3/4 inch (19.1 mm) tap bolts, spaced horizontally 5-5/8 inches (143 mm) on centers. APRIL 28, 2004 HOSE VALVES FOR FIRE-PROTE
37、CTION SERVICE - UL 668 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 12 Outlet Nipples and Threads 12.1 A hose valve outlet shall be threaded in accordance with the Standard for Fire Hose Connections, NFPA 1963, unless otherwise specicall
38、y ordered to t existing equipment. The outlet end shall be provided with at least four full threads. 12.2 The outer end of external and internal threads other than taper pipe threads ANSI/ASME B1.20.1, Pipe Threads, General Purpose (Inch) shall be terminated by the Higbee Cut to facilitate coupling
39、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 hose outlet cap shall be provided for a straightway pattern hose valve intended for use on hydrants. 13.2 A hose outlet cap
40、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, NFPA 1963, shall be provided with each hose outlet cap. 13.4 The cap nut on a hydrant hose valve shall have dimensions corre
41、sponding 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 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
42、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. 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 th
43、e parts cannot separate in use. See Hydraulic Operation Test, Section 22, and Mechanical Strength Test, Section 25. APRIL 28, 2004 HOSE VALVES FOR FIRE-PROTECTION SERVICE - UL 668 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 15 Stuffing
44、Boxes and Seals 15.1 A valve shall include a stuffing box, or other means for sealing, so that there shall be no 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
45、bronze. 15.2 A stuffing box shall include a gland or follower with a packing nut. There shall be no threads within 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 remo
46、val tools. 15.4 The stuffing box bottom and the end of the gland shall be beveled. 15.5 A valve shall be constructed 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 s
47、hall 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 han
48、dwheel shall be not less than that specied in Table 16.1 for any given valve inlet size and pressure. Table 16.1 Minimum handwheel diameter Nominal pipe size of valve inlet, inches Diameter of handwheel for working pressures 175 psi (1.21 MPa) 300 psi (2.07 MPa) Inches (mm) Inches (mm) 1 2-5/8 (66.8
49、) 3 (76.2) 1-1/4 3 (76.2) 3-1/4 (82.6) 1-1/2 3-1/4 (82.6) 3-1/2 (88.9) 2 3-1/2 (88.9) 4-3/8 (111.1) 2-1/2 4-3/8 (111.1) 5 (127.0) 3 6 (152.4) 7 (177.8) 16.2 A handwheel rim shall have a rounded surface and shall be free from sharp projections. 16.3 The handwheel shall be marked as specied in 27.3. APRIL 28, 2004 HOSE VALVES FOR FIRE-PROTECTION SERVICE - UL 668 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 17 Angle Pa
