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1、Subject 33 (2167) (in reply, refer to Subject 33) 12 Laboratory Drive Research Triangle Park, NC 27709 November 20, 2003 TO: SUBJECT: Standards Technical Panel (STP) for Sprinkler Equipment for Fire Protection (STP Subscribers to ULs Standards Services for: 199); Heat Responsive Links for Fire Prote
2、ction Services, UL 33; Water Mist Extinguishing Systems Units, UL 2167; Other Interested Parties Request for Comments on Revisions to the Seventh Edition of the Standard for Heat Responsive Links for Fire Protection Service, UL 33, and the First Edition of the Standard for Water Mist Extinguishing S
3、ystems Units, UL 2167. PROPOSED EFFECTIVE DATES INSTRUCTIONS STP Members: If you are a voting member of the STP, complete the attached ballots with your vote on the proposals. Please note that all negative ballots must be accompanied by supporting written reasons and, where possible, proposals for a
4、 solution to the problem raised. Impact statements and effective dates information are not subject to letter ballot. Therefore, comments regarding impact statements and effective dates may be made and should be sent to the STP Secretary separate from the letter ballot. Subscribers and other interest
5、ed parties: If you are a subscriber or other interested party, you are requested to send comments on the proposed requirements, impact statements, and proposed effective dates to the STP Secretary. The STP member ballot should not be used to submit your comments. Comments should be made in writing a
6、nd may be sent by fax to (919) 316-5614 or by mail to the attention of Amy Stone at ULs Research Triangle Park office. Comments may also be sent via E-mail to Amy.S. Please reference all correspondence to Subject 33. Note all comments received are public and may be circulated to others. If you respo
7、nd by fax or E-mail, please include your full name and company name and address to ensure a reply. Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=Army Northwestern Div./7838506130, User=abc, abcdd Not for Resale, 09/09/2006 23:40:46 MDTNo reproduction or netwo
8、rking permitted without license from IHS -,-,- SUBJECT 33 -2- NOVEMBER 20,2003 SUMMARY OF TOPICS The following changes in requirements are being proposed: 1. Revision of the Sensitivity - Oven Heat Test (UL 33) 2. Addition of Glass Bulb Integrity Requirements (UL 2167) 3. Revision to Clarify Open Ar
9、ea Fire Test Methods and Requirements (UL 2167) STP BALLOTS AND ALL COMMENTS DUE: December 19,2003 Attached, as Appendix A are the proposed revisions for UL 33. Attached, as Appendix B are the proposed revisions for UL 2167. Attached as Appendix C for your review and comment are the impact statement
10、s and proposed effective dates. Attached as Appendices D, E, and F are the STP membership roster and the STP ballots. Questions regarding interpretation of requirements should be directed to the responsible UL Staff. Please see Appendix G of this bulletin regarding designated responsibility for the
11、subject product categories. Please note that proposed requirements are of a tentative and early nature and are for review and comment only. Current requirements are to be used to judge a product until these requirements are published in final form. PRODUCTSANDINDUSTRIESAFFECTED BYTHE PROPOSAL UL req
12、uests your assistance in identifying other products or industries that might be affected by the requirements contained in this bulletin. UL suggests that all suppliers or customers for these products and industries be made aware of these requirements prior to their proposed effective date. Also, ple
13、ase forward your suggestions to UL so that these products and industries may be identified in future bu I let ins. Unless specifically requested to do so, UL will not acknowledge comments indicating concurrence with these proposals. UNDERWRITERS LABORATORIES INC. REVIEWED BY: AMY STONE DAN RYAN Secr
14、etary for STP 199 Chair for STP 199 Standards Specialist Global Standards Standards Department RESEARCH TRIANGLE PARK DIVISION RESEARCH TRIANGLE PARK DIVISION Phone: (91 9) 549-1 658 Phone: (919) 549-0948 Em a i I : Dan i el. P. Rya nus . u I .com Fax: (919) 316-5614 E-mail: Amy.S http:/ Copyright O
15、 2003 Underwriters Laboratories Inc. Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=Army Northwestern Div./7838506130, User=abc, abcdd Not for Resale, 09/09/2006 23:40:46 MDTNo reproduction or networking permitted without license from IHS -,-,- SUBJECT 33 SR:
16、JAH bul-33.7-20031015 -3- NOVEMBER 20,2003 Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=Army Northwestern Div./7838506130, User=abc, abcdd Not for Resale, 09/09/2006 23:40:46 MDTNo reproduction or networking permitted without license from IHS -,-,- SUBJECT 3
17、3 -Al- NOVEMBER 20,2003 APPENDIX A RATIONALE STATEMENTS AND DESCRIPTION OF PROPOSED REVISIONS For your convenience in review, proposed additions to existing requirements are shown underlined and proposed deletions are shown tmd-e THERUOCOVPLE I I HEATING PLENUU I ffu8(2oJIzohni) SOUARE DUCT *IR MLOC
18、ITY OAUPER 54“ I (1.37m) NOVEMBER 20,2003 8x8(10320Smm) MUARE DUCT (PROPOSED SECTION) 10 Sensitivity - Oven Heat Test 10.1 A link shall have the following operating time characteristics when tested in the sensitivity test oven as specified in 10.2 - 10.5: a) For a QR link, a maximum operating time a
19、s specified in Table 10.1 is to be used for each sample. If the link temperature rating is not shown in Table 10.1, the maximum operating time for each sample is to be determined by using the formula specified in 10.5 based on a Response Time Index (RTI) value of 50 (m.s)1/2 90 (ft.)l/, and the mark
20、ed temperature rating of the link. b) A standard response link shall operate within the time range specified in Table 10.1 for each sample link when tested in the oven heat test as specified in 10.2 - 10.5. If the nozzle temperature rating is not shown in Table 10.2, the minimum and maximum operatin
21、g time range for each sample is to be determined by using the formula specified in 10.5, based on a RTI value of 80 (m.s)II2 I45 (ft.)l/ for the minimum value and on a RTI value of 350 (m.s)II2 630 (ft.)l/ for the maximum value, and the marked temperature rating of the link. c) The mean operating ti
22、me shall be equal to or less than a 1.30 multiple of the mean operating time of the link tested in accordance with (a) and (b) after being subjected to the exposure tests specified in Section 13, 10-Day Corrosion Test, and Section 14, 30-Day Corrosion Test. Copyright Underwriters Laboratories Inc. P
23、rovided by IHS under license with ULLicensee=Army Northwestern Div./7838506130, User=abc, abcdd Not for Resale, 09/09/2006 23:40:46 MDTNo reproduction or networking permitted without license from IHS -,-,- SUBJECT 33 Temperature rating “F (“Cl 135-1 70 (57-77) 175-225 (79-107) 250-300 (1 21 -1 49) 3
24、25-375 (163-191) 400-475 (204-246) 500-575 (260-302) -A4- Oven temperature O F f2F (“c Iloc) 275 (135) 386 (197) 555 (290) 765 (407) 765 (407) 765 (407) NOVEMBER 20,2003 Table 10.1 Operating time for links in sensitivity-oven heat test Temperature rating “F 135 140 155 160 165 175 200 21 2 220 250 2
25、86 300 360 400 450 500 (“Cl (57.2) (60.0) (68.3) (71.1) (73.9) (79.4) (93.3) (100.0) (121.1) (104.4) (141.1) (148.9) (182.2) (204.4) (232.2) (260.0) Oven temperature “F 275 275 275 275 275 386 386 386 386 555 555 555 765 765 765 765 Quick response type, seconds Max. 11.2 12.3 12.3 17.4 18.8 12.1 16.
26、1 18.2 19.6 14.3 18.1 19.8 16.7 20.0 24.6 30.0 Standard response type, seconds Min. 17.8 19.7 19.7 27.7 30.0 19.4 25.7 29.0 31.8 22.7 29.0 31.7 26.8 32.0 39.4 48.1 Max. 78.0 86.1 86.1 121.3 131.1 84.8 112.4 127.1 137.3 99.3 126.8 138.5 11 7.0 139.9 172.3 210.3 Coated standard response type, secondsa
27、 Max. 180 180 180 180 180 180 180 180 180 180 180 180 180 180 180 210.3 Corrosion resistant links with coated heat responsive elements including wax, lead, Teflon, wax over lead, and polyester zoatina. Coated quick response links shall comply with lO.la). Table 10.2 Sensitivity oven temperatures 10.
28、3 The samples are to be conditioned at 75 I2“F (24 I1“C) for at least 2 hours. The samples are then to be quickly plunged into the sensitivity test oven in the vertical position. Each link is to be observed to determine if operation occurs within the time specified in 10.1. Copyright Underwriters La
29、boratories Inc. Provided by IHS under license with ULLicensee=Army Northwestern Div./7838506130, User=abc, abcdd Not for Resale, 09/09/2006 23:40:46 MDTNo reproduction or networking permitted without license from IHS -,-,- SUBJECT 33 -A5- NOVEMBER 20,2003 10.4 The sensitivity test oven is to consist
30、 of an 8-inch (203-mm) square stainless steel chamber as shown in Figure 10.1. A constant air velocity of 8.33 10.05 feet per second (2.54 IO.01 m/s) and an air temperature as specified in Table 10.2 for each temperature rating are to be established. Air velocity is to be measured using an orifice p
31、late and a manometer or a bidirectional probe and a velometer. The air temperature is to be measured by use of a 30 AWG (0.05 mm2) thermocouple centered upstream from the sample as shown in Figure 10.1. Figure 10.1 Sensitivity test oven 16“(406mm) 14“(356mm) PRESYIRE TAPS I 30 Am: THERMOCOUPLE I - n
32、m) , 12“ , -c I HEATING PLENUU A *IR MLOCITY OAUPER t C31430 ROWER 8x8(203203mrn) W A R E DUCT 54“ (1.37m) 1 10.5 The required link operating time values specified in 10.1 shall be calculated by using the following equation : Copyright Underwriters Laboratories Inc. Provided by IHS under license wit
33、h ULLicensee=Army Northwestern Div./7838506130, User=abc, abcdd Not for Resale, 09/09/2006 23:40:46 MDTNo reproduction or networking permitted without license from IHS -,-,- SUBJECT 33 -A6- NOVEMBER 20,2003 (Tm-Tu) Tg -Tu -RTI * In 1 - I fi to = s4739 Where: RTI is Response Time Index (m.s)1/2; ( f
34、t ) / to is Operating time of the link s u is Nominal gas velocity in the test section of the wind tunnel t2.54 m/s; 8.33 ft/s T, is Marked temperature rating of the link rC; O F T, is Nominal gas temperature in test section in Table 19.2 rC; O F Tu is Nominal ambient air temperature 24“C; 75“F Copy
35、right Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=Army Northwestern Div./7838506130, User=abc, abcdd Not for Resale, 09/09/2006 23:40:46 MDTNo reproduction or networking permitted without license from IHS -,-,- SUBJECT 33 -BI- NOVEMBER 20,2003 APPENDIX B RATIONALE ST
36、ATEMENTS AND PROPOSED REVISIONS FOR UL 2167, WATER MIST EXTINGUISHING SYSTEMS UN ITS 2. ADDITION OF GLASS BULB INTEGRITY REQUIREMENTS RATIONALE Based upon information received from several field locations where glass bulb sprinklers have been installed, damage to these products may be contributing t
37、o premature operation and fracturing or other degraded performance of the glass bulb. To address the potential for glass bulbs to be damaged before or during assembly, UL is proposing production tests at the nozzle manufacturing facility for all automatic nozzles utilizing a glass bulb heat responsi
38、ve element. Therefore, UL proposes to add Section 48A, Glass Bulb Integrity Test, of UL 2167. To address concerns regarding damage to nozzles due to handling and installation onto the spray nozzle system, UL is proposing the use of protective covers that are to be removed after the nozzle is install
39、ed in the system. Therefore, UL proposes to add Section 6A, Protective Covers, Section 27A, Impact Test for Protective Covers, and paragraph 50.6. These revisions have already been adopted into ULs sprinkler standards. PROPOSALS (NEW SECTION) 6A Protective Covers 6A.1 Nozzles with glass bulb type he
40、at responsive elements shall be equipped with protective covers that are designed to remain in place during installation and be removed before the spray nozzle system is placed in service. Exception: Certain automatic nozzle designs that are constructed to provide protection for the glass bulb durin
41、g handling, such as nozzles with guards, may not be required to have protective covers. 6A.2 Automatic nozzles required to be equipped with protective covers shall comply with Section 27A, Impact Test for Protective Covers, and 50.6. (NEW SECTION) 27A Impact Test for Protective Covers 27A.1 A glass
42、bulb type automatic nozzle, with the protective cover installed, shall not be damaged or leak and the cover shall remain in place when tested. See Figure 27A.1. Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=Army Northwestern Div./7838506130, User=abc, abcdd N
43、ot for Resale, 09/09/2006 23:40:46 MDTNo reproduction or networking permitted without license from IHS -,-,- SUBJECT 33 -B2- NOVEMBER 20,2003 Length to be Determined (Function of Required Weight) Detail “A“ Mass 12.70mm Diameter AISI C1018 Cold Finished Steel S2469G l m Figure 27A.1 Impact test appa
44、ratus for protective covers Cold Drawn Seamless Steel Tubing G Inside Diameter 14.10 mm +O -0.13 mm - Adjustable Brackets Mass (see Detail “A) Latching Pin Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=Army Northwestern Div./7838506130, User=abc, abcdd Not fo
45、r Resale, 09/09/2006 23:40:46 MDTNo reproduction or networking permitted without license from IHS -,-,- SUBJECT 33 -B3- NOVEMBER 20,2003 27A.2 Five sample automatic nozzles having glass bulb heat responsive elements with their protective covers are to be mounted in the horizontal position and impact
46、ed with a cylindrical mass equivalent to the mass of the nozzle to the nearest 15-gram increment from a height of one meter onto the geometric center of the glass bulb heat responsive element. Five additional samples are to be tested with the impact applied to the opposite side of the nozzle if the
47、cover is designed to provide unsymmetrical protection. If the glass bulb extends beyond the perimeter of the nozzle deflector, an additional five samples are to be mounted in the vertical position and impacted with the same cylindrical mass from a height of one meter onto the geometric center of the
48、 glass bulb heat responsive element. The mass is to be prevented from impacting more than once upon each sample. Following the impact, each nozzle is to be visually examined and there shall be no evidence of cracks, breaks, or any other damage to the glass bulb. Each sample nozzle shall then withstand a hydrostatic pressure of twice the rated working pressure for 1 minute without leakage. In add