1、- STD-ITU-T RECMN L.33-ENGL 199 I 48b259L 0655955 ?YT I INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOM MUN ICATION STANDARDIZATION SECTOR OF ITU L.33 (1 0/98) SERIES L: CONSTRUCTION, INSTALLATION AND PROTECTION OF CABLES AND OTHER ELEMENTS OF OUTSIDE PLANT Periodic control of fire extinction de
2、vices in telecommunication buildings ITU-T Recommendation L.33 (Previously CCIT Recommendation) ITU-T L-SERIES RECOMMENDATIONS CONSTRUCTION, INSTALLATION AND PROTECTION OF CABLES AND OTHER ELEMENTS OF OUTSIDE PLANT For further details, please refer to IW-T List of Recommendations. ITU-T RECOMMENDATI
3、ON L.33 PERIODIC CONTROL OF FIRE EXTINCTION DEVICES IN TELECOMMUNICATION BUILDINGS Summary This Recommendation considers the maintenance and control of fixed installations and portable extinguishers. It describes the procedures for inspection, maintenance and discharge testing of fixed water, CO, an
4、d Halon 1301 installations, and portable extinguishers. Source ITU-T Recommendation L.33 was prepared by ITU-T Study Group 6 (1997-2000) and was approved under the WTSC Resolution No. 1 procedure on the 9“ of October 1998. Recommendation L.33 (10/98) 1 STD-ITU-T RECMN L.33-ENGL 1978 48b2593 Ob55958
5、Y59 FOREWORD IT (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the ITU. The ITU-T is responsible for studying technical, operating and tariff questio
6、ns and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, establishes the topics for study by the ITU-T Study Groups which, in their turn, produce Recommend
7、ations on these topics. The approval of Recommendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC
8、. NOTE In this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS The ITU draws attention to the possibility that the practice or implementation of this Recommenda
9、tion may iiivolve the use of a claimed Intellectual Propery Right. The ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of appr
10、oval of this Recommendation, the ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the
11、TSB patent database. O ITU 1999 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. 11 Recommendation L.33 (10/98) 1 2 2.1 2.2 2.3 CONTE
12、NTS Page Introduction It is recommended Portable extinguishers 2.1.1 Inspection 2,1.2 Maintenance 2.1.3 Discharge tests . Fixed installations 2.2.1 Fixed water installations 2.2.2 CO, installations Maintenance periods . 2.2.3 Fixed Halon 1301 installations Recommendation L.33 (10/98) 1 1 1 1 2 2 4 .
13、 111 Recommendation L.33 PERIODIC CONTROL OF FIRE EXTINCTION DEVICES IN TELECOMMUNICATION BUILDINGS (Geneva, 1998) 1 Introduction Once a fire extinction system has been designed and adopted, it becomes the responsibility of the telecommunication enterprise to ensure that it is properly controlled an
14、d maintained. Telecommunication buildings are equipped with two types of fire extinction systems: - portable extinguishers; - fixed installations. One of the key factors in effective fire control, when a fire breaks out, is the proper upkeep and optimal performance of these systems. Good care and ma
15、intenance of fire extinction systems are vital to ensure that they operate properly in an emergency. Without adequate planning and implementation of maintenance programmes, even the best designed systems may fail at the critical moment. Also to be taken into account is the role played by insurance c
16、ompanies, which carry out periodic inspections of fire extinction systems and whose reports influence the cost of insurance premiums. 2 It is recommended Methods for the inspection and maintenance of every component of fire extinction systems should be introduced, with a view to guaranteeing their e
17、ffectiveness in the event of a fire. Inspection of fire extinction installations should be carried out in compliance with internal policies adopted in that respect by the telecommunication enterprise. According to inspection schedules and standards, inspections may be carried out: 4 b) by the enterp
18、rises own specially trained personnel; by specialized companies, which must comply with the requirements laid down by the competent authorities in each country. 2.1 Portable extinguishers Fire extinguishers should be subjected to inspection, maintenance and refilling procedures designed to ensure th
19、eir optimal operation in the event of the outbreak of fire. The aim is to ensure that extinguishers are loaded and will operate effectively upon use. 2.1.1 Inspection A general inspection should be made of the state of fire extinguishers, as well as their accessibility and markings. This inspection
20、will veri that: - - they are clearly visible; fire extinguishers are located as indicated in the corresponding plan; Recommendation L.33 (10/98) 1 access to them is not obstructed; they have not been activated? nor are partially or completely empty; they have not been handled improperly; their conta
21、iners have not suffered obvious damage; service pressures are as required (pressure gauge readings); maintenance cycles are observed. Maintenance The maintenance procedure should consist in an exhaustive inspection of the three main parts of the fue extinguisher: - the mechanical part; - the extingu
22、ishing agent; - the propellant part. Fire extinguisher maintenance - particularly where hydrostatic testing and reloading is concerned - is a specialized task which must be carried out by trained personnel. Given the importance of this task and the need for reliability in an emergency? we recommend
23、that Administrations contract companies which have proven experience in this activity, have adequate facilities and comply with the regulations in force in each country. All fire extinguishers should have an attached card showing the expiry dates of the hydrostatic test and extinguishing agent. In a
24、ddition to the card, a permanent record, showing the following information, should be kept on file for each fire extinguisher: a) b) cl The need to reload fire extinguishers may arise in the course of maintenance. Reloading consists in topping up or replacing the extinguishing agent and, if necessar
25、y, the propellant gas. For this operation, the directions given on the fire extinguisher specification plate must be followed, and only the agents indicated there may be used. After reloading, pressurized or auto-propelled fire extinguishers must be submitted to a test to check tightness and losses;
26、 this test must be accurate enough to ensure at least one year of extinguisher operability. Seals and instruction labels must then be replaced, as must the security pin which prevents accidental actuation of the extinguisher. 2.1.3 Discharge tests Owing to possible deterioration, the extinguishing a
27、gent needs to be renewed. This procedure consists in discharging the extinguisher, carrying out hydrostatic testing of the container and checking the operation of each of the components. The frequency of inspections, maintenance and discharge tests should be set by each Administration according to l
28、ocally prevailing conditions. date of maintenance and name of the person responsible; date of last reloading and name of the person responsible; permanent deformation following hydrostatic testing. 2 Recommendation L.33 (10/98) STDmITU-T RECMN L-33-ENGL 1998 = 48b2591 0b559bZ 98“ 2.2 Fixed installat
29、ions An inspection and maintenance programme should be established for all devices and equipment forming part of fixed fire extinction installations. 2.2.1 Fixed water installations 2.2.1.1 Installed fire hydrants Checks should be carried out to ensure that: - - - - - - water supply sources are in g
30、ood repair; inlet valves and fixed spigots remain open and secured; piping joins present no leaks; hoses and valve levers and taps are properly accessible; hose cabinets are in good repair; hoses are in perfect condition, by unrolling them to check for cuts, bad joins and loose connections; all hose
31、s withstand pressures in accordance with national standards, without presenting leaks. - 2.2.1.2 Hydrants The operational condition of all piping, and correct positioning valves, hose nozzles and ancillary items should be checked. 2.2.1.3 Dry rising mains The nozzles of dry rising mains and their su
32、pply intakes should be checked, ensuring that external caps and coupling stopcocks are shut, that connection caps are in good condition and that section stopcocks are open. 2.2.1.4 Sprinklers Sprinkler systems should be inspected by the supplier company or other specialized company acknowledged by a
33、 recognized authority. It should be checked that sprinkler heads are unobstructed. The testing valve for each sector of the installation areas should be activated, and in each case the correct operation of the other components should be checked. Periodic testing programmes and reports should be sche
34、duled according to the type and critical level of each component of the system. 2.2.2 CO, installations 2.2.2.1 Inspection - The state of the CO, in low and high pressure systems should be checked regularly, as well as immediately after the activation of such systems. The whole system should be insp
35、ected and all devices checked, with partial discharge if necessary. Inspectors should verify whether the risk level or condition of premises have changed. . Cylinder weights should be checked and cylinders replaced or reloaded if losses are greater than 10%. - - - Recommendation L.33 (10/98) 3 STD-I
36、TU-T RECMN L-33-ENGL 1998 W 48b259L Ob55963 83rb 8111 2.2.2.2 Tests and maintenance - Operating tests should be carried out on all system components. 2.2.3 Fixed Halon 1301 installations In view of the negative impact of Halon 1301 on the environment, it is strongly recommended that Halon 1301 or ot
37、her CFC components be eliminated from all fire extinction devices. 2.3 Maintenance periods Maintenance periods for several national standards are given in Appendices I to IV of Recommendation L.23. 4 Recommendation L.33 (10/98) STD-ITU-T RECMN L-33-ENGL 1998 = 4862591 0655964 752 . . . . STD-ITU-T R
38、ECMN L.33-ENGL 1998 W 48b2591 Ob55765 b97 E ,cries A leries B leries C ieries D ieries E ;cries F Series G leries H Series I Series J Series K Series L Series M Series N Series O Series P Series Q Series R Series S Series T Series U Series V Series X Series Y Series Z ITU-T RECOMMENDATIONS SERIES Or
39、ganization of the work of the ITU-T Means of expression: definitions, symbols, classification General telecommunication statistics General tariff principles Overall network operation, telephone service, service operation and human factors Non-telephone telecommunication services Transmission systems
40、 and media, digital systems and networks Audiovisual and multimedia systems Integrated services digital network Transmission of television, sound programme and other multimedia signals Protection against interference Construction, installation and protection of cables and other elements of outsidt p
41、lant TMN and network maintenance: international transmission systems, telephone circuits telegraphy, facsimile and leased circuits Maintenance: international sound programme and television transmission circuits Specifications of measuring equipment Telephone transmission quality, telephone installat
42、ions, local line networks Switching and signalling Telegraph transmission Telegraph services terminal equipment Terminals for telematic services Telegraph switching Data communication over the telephone network Data networks and open system communications Global information infrastructure Programming languages Printed in Switzerland Geneva, 1999
