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1、Subjects 1769 (2227) (In reply, refer to Subject 1769) 1655 Scott Blvd. Santa Clara, CA 95050 July 21, 2004 TO:Standards Technical Panel (STP) for Cylinder Valves, STP 1769 Subscribers to ULs Standards Service for Cylinder Valves Overfi lling Prevention Devices Public Review Participants SUBJECT:Rep
2、ort of the Meeting of the Standards Technical Panel of UL for Cylinder Valves; Comments and Substantive Changes Received on the ANSI Ballot of the Third Edition of the Standard for Cylinder Valves, UL 1769 and the First Edition of the Standard for Overfi lling Prevention Devices, UL 2227 Summary of
3、Topics The following topics were discussed at the meeting: 1) STP Process Overview 2) Comment Matrix, UL 1769, (Appendix A) 3) Comment Matrix for UL 2227, (Appendix B) 4) Discussion Topics for UL 1769 and UL 2227, (Appendix D) 5) Internal POL Threads 6) Handwheel Closing Torque for Small Handwheel V
4、alves, UL 1769 7) Liquid Propane Entering Regulator, UL 2227 8) Material Compatibility Test for Hydrogen Service, UL 1769 COMMENTS DUE: AUGUST 18, 2004 A meeting of the Standards Technical Panel of UL for Cylinder Valves was held on May 19 and 20, 2004 at the Northbrook Office of Underwriters Labora
5、tories. The purpose of the meeting was to discuss and resolve comments received in response to the ANSI ballots of BSR/UL 1769 for the Standard for Cylinder Valves, UL 1769; and to the ANSI ballots of BSR/UL 2227 for the Standard for Overfi lling Protection Devices, UL 2227. Meeting policies and pro
6、cedures were also covered. Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 10/20/2006 05:13:41 MDTNo reproduction or networking permitted without license from IHS -,-,- INSTRUCTIONS STP Members: From th
7、e returned August 4, 2003 ballots, UL determined that consensus was not achieved regarding the ANSI approval of UL 1769 and UL 2227. The initial count is 5 Yes, 3 No, and 0 Abstain for UL 1769, and the count is 4 Yes, 4 No, and 0 abstain for UL 2227. In order to address member issues and achieve pan
8、el consensus, actions have been taken toward resolving the comments made during the balloting process. The comments and proposed dispositions/actions are presented in this bulletin. Please refer to Appendix A and B for the comments and the proposed dispositions/actions, and to Appendix C for the pro
9、posed revisions to the requirements, based on the comments received. Attached as Appendix G are the impact statements and proposed effective dates. If you wish to change your vote in light of the dispositions/actions or the proposed changes, please respond to us in writing by August 18, 2004. If we
10、do not hear from you, your original vote will be maintained. If a change of votes for UL 1769 and UL 2227 results in consensus, UL would adopt standards UL 1769 and UL 2227 as ANSI standards. Anyone who has submitted an objection has the right to appeal this action on a procedural basis through ULs
11、Appeals Process. If you wish to appeal, please respond by August 18, 2004. Please note that only appeals based on a procedural issue will be heard, technical issues should be resolved at the consensus body level. Guidelines on how to register an appeal can be obtained on http:/ or by contacting the
12、 STP Project Manager. UL appreciates the time and effort you have put forth to review this standard, and look forward to your continued participation in this UL/ANSI standard activity. Subscribers and other interested parties: If you are a subscriber or other interested party, you are requested to s
13、end comments on the proposed requirements, impact statements, and proposed effective dates to the STP project manager. The STP member ballot should not be used to submit your comments. Comments received in response to the balloting of UL 1769 and UL 2227 appear in Appendices A and B, respectively, a
14、long with the proposed dispositions/actions. Appendix C contains the proposed changes in the requirements, based on the comments received. Comments should be made in writing and may be sent by fax to (408) 556-6045 or by mail to the attention of Gail Yee at ULs Santa Clara office. Comments may also
15、be sent via E-mail to Gail.K.Y. Please reference all correspondence to Subject 1769. Note all comments received are public and may be circulated to others. If you respond by fax or E-mail, please include your full name and company name and address to ensure a reply. Attached as Appendix E is informa
16、tion regarding Working Groups. Attached as Appendix F is a list of those who attended the meeting. Questions regarding interpretation of requirements should be directed to the responsible UL Staff. Please note that proposed requirements are of a tentative and early nature and are for review and comm
17、ent only. Current requirements are to be used to judge a product until these requirements are published in fi nal form. JULY 21, 2004SUBJECT 1769-2- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 10/20
18、/2006 05:13:41 MDTNo reproduction or networking permitted without license from IHS -,-,- * * * * * * The following report is not intended to be a verbatim transcript of the discussion at the meeting, but is intended to record the signifi cant features of those discussions. 1. STP PROCESS OVERVIEW An
19、 overview of the STP process was presented at the meeting and questions were answered. The STP process establishes ULs standards development method as an ANSI accredited consensus method. It is a method of maintaining ANSI approval where each proposed revision goes through the consensus process befo
20、re it is adopted and published, or when necessary, the entire standard may be submitted to the STP for ANSI approval. For UL Standards that are American National Standards, the STP will be balanced and will serve as the consensus body that votes on proposals before they are published. A balanced STP
21、 is one in which the membership of any one group (Producers, Users, and General Interest) does not comprise a majority of the STP. At the end of the balloting process, consensus has been achieved when the STP has returned the majority of the ballots with approval by 2/3 of those voting, minus absten
22、tions and negative votes without comment. UL explained that the STP process has been derived from guidelines developed by the American National Standards Institute (ANSI). The goal of the new STP process was to form a balanced panel consisting of members from groups of producers, users, and general
23、interest areas where one group would not comprise more than 50 percent of the total. The main points of the process were emphasized: a) STP meetings are considered open for discussion and consensus building. b) Panel member attendance at STP meetings is not mandatory. c) STP meetings are not require
24、d to have a quorum. d) Balloting on new proposed requirements to a standard is not conducted at STP meetings. During a meeting however, the STP chair may informally poll members on new and proposed requirements to get a general idea of support for a particular item being discussed. e) Consensus for
25、a proposal is reached when a majority of the STP returns ballots, and 2/3 of the STP members who return a ballot (excluding abstentions, negatives without comment, and negatives based on material not under consideration) vote affirmatively. f) UL only has one vote on the STP. g) Certifi cation issue
26、s are not to be discussed during STP meetings unless they are deemed to have a direct impact on standards development issues. h) STP members should return ballots to UL in a timely manner regardless if they agree or disagree on a proposal. i) The patent policy is based on model ANSI Patent policy gu
27、idelines. Additional patent information can be found on website: http:/ JULY 21, 2004SUBJECT 1769-3- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 10/20/2006 05:13:41 MDTNo reproduction or networking
28、permitted without license from IHS -,-,- UL also noted that meeting attendees will normally receive an electronic copy of the STP meeting report in PDF format approximately 30 days after the meeting. UL added, however that this date could be extended if the report contains proposals for balloting. U
29、L also emphasized that the STP consensus process was a change from the former Industry Advisory Conference (IAC) concept. The STP process for reviewing new and proposed requirements for a UL standard can last for an extended period of time, since additional time may be needed to resolve objections t
30、o proposals and to circulate continuing objections. 2. COMMENT MATRIX, UL 1769 DISCUSSION Comments received in response to the ballot of BSR/UL 1769 (dated August 4, 2003), for the third edition of the Standard for Cylinder Valves, UL 1769, were discussed at the meeting. Please refer to the comment
31、matrix in Appendix A for the disposition of the comments received and to Appendix C for revisions to the proposed text resulting from the comment resolutions. 3. COMMENT MATRIX, UL 2227 DISCUSSION Comments received in response to the ballot of BSR/UL 2227 (dated August 4, 2003), for the fi rst editi
32、on of the Standard for Overfi lling Prevention Devices, UL 2227, were discussed at the meeting. Please refer to the comment matrix in Appendix B for the disposition of the comments received and to Appendix C for revisions to the proposed text resulting from the comment resolutions. 4. DISCUSSION TOP
33、ICS FOR UL 1769 AND UL 2227 DISCUSSION See Appendix D for discussion topics submitted for general discussion during the STP meeting. 5. INTERNAL POL THREADS DISCUSSION The STP discussed several constructional problems concerning internal threads (POL threads) in Type 1 connection devices. Members no
34、ted that some problems include excessive threading of adapters into the connection resulting in damaged check valve modules, overtightened adapters becoming stuck, and occasionally check valve modules locked in the open position. An STP member proposed a possible solution by deleting the POL threads
35、 from Type 1 connection devices. The panel discussed all these issues and also noted that POL threads in Type 1 connection devices are still needed for connection to older model gas grills currently used by consumers. The STP noted that Type 1 connection devices are covered by the Standard for Adapt
36、ers and Cylinder Connection Devices for Portable LP-Gas Cylinder Assemblies, UL 2061, and not by STP 1769, which addresses UL 1769 and UL 2227 requirements. Therefore, any future proposed revisions to Type 1 connections proposed by STP 1769, would need to be submitted for review by the panel coverin
37、g UL 2061. Panel members were encouraged to submit specifi c proposals for revisions to UL 2061. JULY 21, 2004SUBJECT 1769-4- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 10/20/2006 05:13:41 MDTNo re
38、production or networking permitted without license from IHS -,-,- 6. HANDWHEEL CLOSING TORQUE FOR SMALL HANDWHEEL VALVES, UL 1769 DISCUSSION As part of the Endurance Test, a 35 in-lb closing torque is applied to valves with handwheels regardless of the size of the handwheel. Therefore, the torque va
39、lues should be established based upon the size of the handwheel. UL proposed changes to the Standard for Cylinder Valves, UL 1769, which would delete the 35-inch pound closing torque, and replace it with hand-operated valve torque requirements based on the size of the handwheel. This proposal has be
40、en assigned to Working Group 2, which was formed to evaluate and develop proposals for the STP to consider. 7. LIQUID PROPANE ENTERING REGULATOR, UL 2227 DISCUSSION The CPSC has announced the recall of 21,000 UL Recognized Liquid Propane Overfi ll Protective Devices (OPD valves) manufactured by a si
41、ngle company. The recall indicated that when the propane tank is fi lled to capacity and exposed to increased temperatures, liquid propane instead of gas vapor can travel out of the valve and cause the gas regulator to freeze. When the regulator thaws, if the gas valve has not been turned off, gas w
42、ill fl ow to the grill. The resulting build-up of gas in the grill poses a fi re hazard. This manufacturer has redesigned the valve in question and additional tests have shown that the problem has been resolved. Working Group 7 was formed to review various constructional options, and to develop test
43、 requirements if necessary to address this possible fi re hazard. 8. MATERIAL COMPATIBILITY TEST FOR HYDROGEN SERVICE (UL 1769) DISCUSSION The STP discussed the following proposal from UL: RATIONALE The Standard for Cylinder Valves, UL 1769, covers valves for several different fuel gases. Currently,
44、 there is a great deal of activity regarding requirements for hydrogen and hydrogen/fuel gas mixtures with respect to fuel cell development and associated infrastructures. Hydrogen can be produced from natural gas. UL 1769 does not contain hydrogen compatibility tests for elastomeric materials. Some
45、 materials may not be suitable for hydrogen or hydrogen/natural gas service. UL is proposing to add the following tests for elastomeric materials that are used in cylinder valves for hydrogen service: 1) Immersion Tests in IRM 903 oil and n-Hexane Volume Change measurements in IRM 903 oil and n-Hexa
46、ne, Extraction (weight loss) measurements in n-Hexane only. 2) Accelerated Hydrogen-Pressure Aging Test (materials subjected to hydrogen gas at 300 psig, 80C for 14 days followed by visual examination and hand fl exing. The part shall not crack blister, or show visible evidence of deterioration). (T
47、his test method is described in the Standard for Gaskets and Seals, UL 157, Section 17, except that hydrogen gas is substituted for oxygen gas in the test description.) PROPOSALS (NEW SECTION) 19A Accelerated Hydrogen-Pressure Aging Test JULY 21, 2004SUBJECT 1769-5- Copyright Underwriters Laboratori
48、es Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 10/20/2006 05:13:41 MDTNo reproduction or networking permitted without license from IHS -,-,- 19A.1 An elastomeric part is to be subjected to hydrogen gas as described in 19A.2. After conditioning, the part shall not crack, blister, or show visible deterioration. 19A.2 An elastomeric part is to be exposed for 14 days to hydrogen gas at a pressure of 300 15 psig (2068 103 kPa) and at a temperature of 80 1C (168 1.8F) in accordance with the Standard Test Method for Rubber D