UL-33-BULLETINS-2005.pdf

Subject 33 July 1, 2005 SUMMARY OF TOPICS The following changes in requirements are being proposed: Minimum Operating Time for Standard Response Links For your convenience in review, proposed additions to existing requirements are shown underlined and proposed deletions are shown +med-e&. Minimum Operating Time for Standard Response Links RATIONALE Submitted by: Kerry Bell, Underwriters Laboratories Inc. The recently adopted requirements for standard response links include a minimum and maximum operating time for the sensitivity test. While these requirements are similar to those applied to sprinklers, links are generally used in applications that are quite different than sprinklers including the operation of doors, dampers, vents, and the like. For typical link end use applications, the minimum operating time criteria is not considered necessary or appropriate to achieve the desired level of performance during field use. Currently, some links have response characteristics that fall within the range between the maximum time specified for the QR type and the minimum operating time criteria for the standard response type. These links have been used for decades in the field with successful performance. Based upon these considerations, it is proposed that the minimum operating criteria for links, as specified in paragraph 10.1 and Table 10.1, be eliminated. Additionally, a definition of Heat Responsive Link is being proposed for the glossary to clarify the features to be included as part of a heat responsive element. PROPOSAL (NEW DEFINITION) 5.4.1 HEAT RESPONSIVE LINK - A device that includes a heat remonsive element and other features that allow for the amlication of external installation loads. (Revised Paragraph) 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: Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 01/22/2007 19:13:54 MSTNo reproduction or networking permitted without license from IHS -,-,- SUBJECT 33 -2- JULY 1,2005 a) For a QR link, each samde shall have a maximum operating time as specified in Table 10.1 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 marked temperature rating of the link. kn I CI c. If the link temperature rating is not shown in Table 10.1, the b) For a A standard response link, each samde shall have a maximum oDeratina time as &s+I specified in Table 10.1 pd i : : the - 1 n 9 I u III ,C.5. If the link W E & temperature rating is not shown in Table 1 0 . 1 4-W, the fmwmw& maximum operating time mge for each sample is to be determined by using the formula specified in 10.5, based on a RTI value of % + = F I + * 350 (m.s)1/2 630 (ft.)l/ #eHbe . . and the marked temperature rating of the link. +*Y K i vattee# c) The mean operating time 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, IO-Day Corrosion Test, and Section 14, 30-Day Corrosion Test. (Revised Table) Table 10.1 Operating time for links in sensitivity-oven heat test Temperature rating “F 135 140 155 160 165 175 200 21 2 220 250 286 300 360 400 450 500 (“Cl (57.2) (60.0) (68.3) (71 .I) (73.9) (79.4) (93.3) (100.0) (121.1) (1 04.4) (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 ype, seconds Max. 11.2 12.3 12.3 17.4 18.8 12.1 16.1 18.2 19.6 14.3 18.1 19.8 16.7 20.0 24.6 30.0 Standard response type, seconds Max. 78.0 86.1 86.1 121.3 131.1 84.8 112.4 127.1 137.3 99.3 126.8 138.5 117.0 139.9 172.3 210.3 Coated standard response type, secondsa 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 coating 2oated quick response links shall comply with lO.la). Copyright O 2005 Underwriters Laboratories Inc. Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 01/22/2007 19:13:54 MSTNo reproduction or networking permitted without license from IHS -,-,- Subject 33 SUMMARY OF TOPICS The following item is for discussion: Minimum Operating Time for Standard Response Links This is a preliminary review of the proposed revisions. Therefore, there is no balloting at this time. All comments received will be provided to the proposal author with a request that the comments be taken into consideration. The proposal author will then be asked to inform UL Standards whether they wish to amend their proposal or the accompanying rationale before the proposal is advanced to ballot. UL will not require the proposal author to respond to comments received during this preliminary review. Neither is UL required to provide a written response to those comments. Should this proposal (or a modified version of this proposal) advance to ballot, any comments received in response to the balloted proposal will be responded to in accordance with ULs STP procedures. For your convenience in review, proposed additions to existing requirements are shown ynderlined and proposed deletions are shown tmd-e&. 1. Minimum Operating Time for Standard Response Links RATIONALE Submitted by: Kerry Bell, Underwriters Laboratories Inc. The recently adopted requirements for standard response links include a minimum and maximum operating time for the sensitivity test. While these requirements are similar to those applied to sprinklers, links are generally used in applications that are quite different than sprinklers including the operation of doors, dampers, vents, and the like. For typical link end use applications, the minimum operating time criteria is not considered necessary or appropriate to achieve the desired level of performance during field use. Currently, some links have response characteristics that fall within the range between the maximum time specified for the QR type and the minimum operating time criteria for the standard response type. These links have been used for decades in the field with successful performance. Based upon these considerations, it is proposed that the minimum operating criteria for links, as specified in paragraph 10.1 and Table 10.1, be eliminated. PROPOSAL (Revised Paragraph) 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: Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 01/22/2007 19:13:54 MSTNo reproduction or networking permitted without license from IHS -,-,- SUBJECT 33 -2- a) For a QR link, each samde shall have a maximum operating time as specified in Table 10.1 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 marked temperature rating of the link. kn I CI c. If the link temperature rating is not shown in Table 10.1, the b) For a A standard response link, each samde shall have a maximum oDeratina time as &s+I specified in Table 10.1 pd i : : the - 1 n 9 I u III ,C.5. If the link W E & temperature rating is not shown in Table 1 0 . 1 4-W, the fmwmw& maximum operating time mge for each sample is to be determined by using the formula specified in 10.5, based on a RTI value of % + = F I + * 350 (m.s)1/2 630 (ft.)l/ #eHbe . . and the marked temperature rating of the link. +*Y K i vattee# c) The mean operating time 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, IO-Day Corrosion Test, and Section 14, 30-Day Corrosion Test. (Revised Table) Table 10.1 Operating time for links in sensitivity-oven heat test Temperature rating “F 135 140 155 160 165 175 200 21 2 220 250 286 300 360 400 450 500 (“Cl (57.2) (60.0) (68.3) (71.1) (73.9) (79.4) (93.3) (100.0) (121.1) (104.4) (141.1) (1 48.9) (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 16.1 18.2 19.6 14.3 18.1 19.8 16.7 20.0 24.6 30.0 Standard response type, seconds 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 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). Copyright O 2005 Underwriters Laboratories Inc. Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 01/22/2007 19:13:54 MSTNo reproduction or networking permitted without license from IHS -,-,-