1、BRITISH STANDARD BS ISO 19921:2005 Ships and marine technology Fire resistance of metallic pipe components with resilient and elastomeric seals Test methods ICS 47.020.30; 47.020.99 BS ISO 19921:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committ
2、ee on 30 January 2006 BSI 30 January 2006 ISBN 0 580 47359 7 National foreword This British Standard reproduces verbatim ISO 19921:2005 and implements it as the UK national standard. The UK participation in its preparation was entrusted by Technical Committee SME/32, Ships and marine technology, to
3、Subcommittee SME/32/3, Piping and machinery, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international
4、and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalo
5、gue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its corr
6、ect application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to v, a blank page, pages 1 to 9 and a back cover. The BSI copyright notice displ
7、ayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Reference number ISO 19921:2005(E)INTERNATIONAL STANDARD ISO 19921 First edition 2005-10-01 Ships and marine technology Fire resistance of metallic pipe components with resil
8、ient and elastomeric seals Test methods Navires et technologie maritime Rsistance au feu des composants de tuyaux mtalliques avec joints lastiques ou lastomres Mthodes dessai BS ISO 19921:2005ii BS ISO 19921:2005 iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 1 3 D
9、esignation . 1 4 Test pieces and preparation 2 5 Number of test pieces 2 6 Test bench . 2 7 Test performance 2 7.1 Installation of test pieces. 2 7.2 Preparation 3 7.3 Measured values and measuring points 3 7.4 Commencement of test 4 7.5 Test temperatures. 4 7.6 Test pressures 4 7.7 Test duration .
10、4 7.8 Heat flux. 4 8 Assessment. 4 9 Test certificate. 5 Annex A (normative) Test certificate 6 Annex B (informative) Evidence of suitability of other pipeline components via representative nominal bores . 7 Annex C (informative) Pipeline components that can be fire-test qualified using this Interna
11、tional Standard 8 Bibliography . 9 BS ISO 19921:2005 iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees
12、. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the Intern
13、ational Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Sta
14、ndards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subj
15、ect of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 19921 was prepared by Technical Committee ISO/TC 8, Ships and marine technology, Subcommittee SC 3, Piping and machinery. v Introduction The purpose of this International Standard is to establi
16、sh whether a metallic valve, fitting, coupling or similar piping component that contains a resilient or elastomeric seal can be exposed to fire without losing its function, i.e. without leaking when exposed to normal operating pressure. Only water is permitted as the test medium. The use of combusti
17、ble test media is prohibited in order to ensure the safety of operators and the test bench. The test method in this International Standard is intended to provide reproducible results when combined with the test bench in accordance with ISO 19922. In case of a request for a flame test under different
18、 test conditions, e.g. flame temperature, working pressure or duration of flame application, the test is carried out in accordance with this International Standard with the test bench in accordance with ISO 19922, but under the specific conditions requested. BS ISO 19921:2005blank1 Ships and marine
19、technology Fire resistance of metallic pipe components with resilient and elastomeric seals Test methods 1 Scope This International Standard specifies test procedures for determining the fire resistance of metallic valves, pipe couplings, and similar pipe components which contain a resilient or elas
20、tomeric seal and which are used in ship engineering systems. The purpose of this International Standard is to determine whether, after the period of fire testing on a test bench which fulfils the requirements of ISO 19922, pipeline components remain tight, and without any failure which could affect
21、their function, even when subjected to proof pressure. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (includ
22、ing any amendments) applies. ISO 19922, Ships and marine technology Fire resistance of metallic pipe components with resilient and elastomeric seals Requirements imposed on the test bench 3 Designation The designation of the test for determining the fire resistance is composed of the elements quoted
23、 in the example below: Test ISO 19921 30 5 24 F In this designation the elements have the following meaning: Test: designation. ISO 19921: number of this International Standard. 30: test duration in minutes. 5: working pressure during flame application, in bar. 24: proof pressure following flame app
24、lication, in bar. F: test piece with fire sleeve. BS ISO 19921:20052 4 Test pieces and preparation The pipeline components to be tested shall be of a size that allows the flames to completely enclose the test pieces, as required in 7.1. It shall be agreed between the client and the operator of the t
25、est bench how the test pieces are to be attached. The test pieces may be tested either with or without fire protection coating, subject to agreement. Identification letter B is used for tests without fire sleeve, identification letter F for tests with fire sleeve. Prior to the test, the test pieces
26、shall be stored at ambient temperature for 24 h. 5 Number of test pieces The number and size of the test pieces shall be agreed between the client and the operator of the test bench. However, the tests shall be carried out on a minimum of three test pieces of different sizes. The minimum and maximum
27、 sizes of the series of components to be qualified shall be tested in all cases. 6 Test bench The tests shall be carried out on a test bench which fulfils the requirements of ISO 19922. 7 Test performance 7.1 Installation of test pieces The test piece shall be installed on the test bench such that t
28、he burner extends beyond the test piece by at least 20 mm on all sides (see Figure 1) and that the test piece is completely enclosed by the flames. Dimensions in millimetres Key 1 test piece 2 burner Figure 1 Installation of test piece BS ISO 19921:20053 7.2 Preparation After installation, the test
29、piece shall be rinsed with the test medium (water) for at least 1 min, in order to evacuate as far as possible the air contained in the test piece. 7.3 Measured values and measuring points The following values shall be measured at the points indicated (see Figure 2): water temperature at measuring p
30、oints a and b; flame temperature at measuring point c; flow rate of water; pressure inside test piece during flame application; gas consumption. All values shall be recorded in intervals of not longer than 2 min. Dimensions in millimetres Key 1 test piece 2 burner aWater temperature at test piece (i
31、nlet). bWater temperature at test piece (outlet). cFlame temperature below centre of test piece. dFlow direction. Figure 2 Temperature measuring points BS ISO 19921:20054 7.4 Commencement of test The test duration starts at the moment the test piece is exposed to the specified test temperatures (fla
32、me temperature and flowing water temperature), which shall be reached at the measuring points. 7.5 Test temperatures The temperatures according to Table 1 shall be adhered to throughout the test. To ensure the water temperatures are maintained as indicated, the velocity of flow shall be controlled a
33、ccordingly. Table 1 Temperatures temperature measuring point a 80 C 2 CTemperature of flowing water at temperature measuring point b max. 85 C Temperature of flame at temperature measuring point c during test 800 C 50 C NOTE Temperature measuring points are shown in Figure 2. 7.6 Test pressures The
34、test piece shall be subjected to a working pressure of at least 500 kPa 20 kPa (5 bar 0,2 bar) for the test. Alternative working pressures shall be agreed upon. At the end of flame application, the test piece shall be subjected to proof pressure at ambient temperature for 5 min. The proof pressure s
35、hall be at least 1,5 times the nominal or working pressure. 7.7 Test duration The duration of the test shall be 30 min. 7.8 Heat flux The heat flux shall correspond to a pre-mix flame of propane with a fuel flow rate of 5 kg/h for a total heat release rate of 65 kW. The gas consumption shall be meas
36、ured with an accuracy of 3 % in order to maintain a constant heat flux. Propane with a minimum purity of 95 % shall be used. For piping greater than 152 mm in diameter, one additional row of burners shall be included for each 51 mm increase in pipe diameter. A constant heat flux averaging 113,6 kW/m
37、 2( 10 %) shall still be maintained at the 12,5 cm 1 cm height above the centreline of the burner array. The fuel flow shall be regulated to maintain the designated heat flux, and the specimen shall be completely engulfed in the flame envelope. 8 Assessment The test piece is considered to have passe
38、d the test when it remains tight during the flame test and when subjected to proof pressure after flame application. In the event of a test piece failing, the test shall be repeated for two test pieces of the nominal diameter having failed. If during the repeat test one test piece fails, the pipelin
39、e component of the design presented for testing is regarded as having failed. If the test pieces pass the test, the pipeline components of the nominal diameters tested, as well as the further sizes in the series according to Table B.1, are approved. See also Clause 5. NOTE For services other than fl
40、ammable fluids, a leakage rate of not more than 0,2 l/min is considered acceptable. BS ISO 19921:20055 9 Test certificate The test results shall be certified in a test certificate as shown in Annex A. BS ISO 19921:20056 Annex A (normative) Test certificate Test Certificate Fire resistance of pipelin
41、e components subject to ISO 19921 No. Details on test piece Component: Type:. According to specification: Nominal diameter: Allowable working pressure: . bar Proof pressure: bar Manufacturer: Name: . Information on installation of test piece on the test bench: Fire sleeve: . Type: . Test conditions
42、Working pressure during the test: bar Static test pressure following flame application: bar Duration of flame application: min Duration of static pressure load following flame application: . min Test results Water temperature: at test piece inlet: C at test piece outlet: . C Flame temperature: below
43、 centre of test pieces: C Actual test duration: min (if different from the duration of flame application as stipulated under test condition) Tight at test pressure after flame application? yes no Measurement records (see Annex) No.: . Description of failure Remarks (e.g. on behaviour in fire) Assess
44、ment: Test passed: yes no The test was carried out at: Name of test facility: Address of test facility: Inspector (Name): Inspector organization Date of testing: BS ISO 19921:20057 Annex B (informative) Evidence of suitability of other pipeline components via representative nominal bores A selection
45、 of representative nominal bores may be tested in order to evaluate the fire resistance of a series or range of pipeline components, if applicable. The nominal bores to be tested should be agreed upon. Depending on the design of the pipeline components, different nominal bores may be necessary in ea
46、ch case. If there is no agreement on nominal bores, the stipulations in Table B.1 are applicable. Table B.1 Evidence of suitability of other pipeline components on the basis of the nominal bore D NNominal bore of the pipeline component tested D NOther nominal bores, the suitability of which is deeme
47、d to have been proven D N8 8, 10, 15 10 10, 15, 20 15 15, 20, 25 20 20, 25, 32, 40 25 25, 32, 40, 50 32 32, 40, 50, 65 40 40, 50, 65, 80 50 50, 65, 80, 100 65 65, 80, 100, 125 80 80, 100, 125, 150 100 100, 125, 150, 200 125 125, 150, 200, 250 150 150, 200, 250, 300 200 200, 250, 300, 350, 400 250 25
48、0, 300, 350, 400, 450, 500 300 300, 350, 400, 450, 500, 600 BS ISO 19921:20058 Annex C (informative) Pipeline components that can be fire-test qualified using this International Standard The following are examples of metallic piping components that can contain elastomeric seals and can be tested acc
49、ording to this International Standard on a test bench fulfilling the requirements of ISO 19922: pipe fittings such as couplings designed to ISO 15837, compression fittings, flanges, gate valves, butterfly valves, cocks, all kinds of filters including spin on filters; metallic expansion joints and other flexible parts, excluding hoses and hose assemblies. BS ISO 19921:2005
copyright@ 2008-2019 麦多课文库（www.mydoc123.com）网站版权所有
备案/许可证编号：苏ICP备17064731号-1