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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12066 : 1998 The Eu
2、ropean Standard EN 12066 : 1997 has the status of a British Standard ICS 75.200 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Installations and equipment for liquefied natural gas Testing of insulating linings for liquefied natural gas impounding areas Licensed Copy: sheffie
3、ldun sheffieldun, na, Sat Oct 28 16:13:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 February 1998 BSI 1998 ISBN 0 580
4、 28980 X BS EN 12066 : 1998 Amendments issued since publication Amd. No.DateText affected National foreword This British Standard is the English language version of EN 12066 : 1997. The UK participation in its preparation was entrusted to Technical Committee GSE/38, Installation and equipment for LN
5、G, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the
6、 UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled In
7、ternational Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. 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 EN tit
8、le page, pages 2 to 8, an inside back cover and a back cover. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 16:13:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat
9、: rue de Stassart 36, B-1050 Brussels 1997 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12066 : 1997 E EUROPEAN STANDARDEN 12066 NORME EUROPE ENNE EUROPA ISCHE NORM September 1997 ICS 75.200 Descriptors: Gasinstallation,liquefie
10、dnaturalgas,vats,protectivecoatings,insulation,evaporation, water bath evaporation, operating requirements, tests, test equipment, measurements, coefficients, computation English version Installations and equipment for liquefied natural gas Testing of insulating linings for liquefied natural gas imp
11、ounding areas Installations et e quipements relatifs au gaz naturel lique fie Essais de reve tements isolants des cuvettes de re tention de gaz naturel lique fie Anlagen und Ausru stung fu r Flu ssigerdgas Pru fung von Wa rmedammbeschichtungen fu r Flu ssigerdgas-Auffanbecken This European Standard
12、was approved by CEN on 22 August 1997. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such
13、national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language an
14、d notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzer
15、land and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 16:13:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2 EN 12066 : 1997 BSI 1998 Foreword This European Standard has been prepared by Technical Committee CEN/TC 282, Installation and equipment for LNG, the secreta
16、riat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 1998, and conflicting national standards shall be withdrawn at the latest by March 1998. According to the CEN/
17、CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden,
18、 Switzerland and the United Kingdom. Contents Page Foreword2 1Scope3 2Normative references3 3Definitions3 4Description of the means of and the equipment required for testing3 4.1Characteristics of test pieces3 4.2Equipment used to measure the evaporation coefficient of LNG in contact with the insula
19、ting lining3 4.3Equipment used to measure the water absorption ratio of an insulating lining3 5Test method3 5.1Measurement of the evaporation coefficient of LNG in contact with the insulating lining3 5.2Measurement of the water absorption ratio of the insulating lining4 6Testing4 7Test report4 Annex
20、es A(normative) Specification of the test rig5 B(normative) Measuring equipment used to determine the evaporation coefficient of LNG in contact with the insulating lining6 C(normative) Method of calculation of the evaporation coefficient of LNG in contact with the insulating lining6 D(normative) Met
21、hod of calculation of the water absorption ratio of insulating lining7 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 16:13:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN 12066 : 1997 BSI 1998 1 Scope This European Standard specifies the tests to be carried out in order to assess th
22、e suitability of insulating linings used in LNG impounding areas. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed h
23、ereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 1160Installations and equipme
24、nt for liquefied natural gas General characteristics of liquefied natural gas prEN 12379Testing concrete Making and curing specimens for strength tests 3 Definitions For the purposes of this standard, the following definitions apply: 3.1 liquefied natural gas (LNG) See EN 1160. 3.2 insulating lining
25、 Material or layers of materials designed to minimize evaporation of an LNG pool. 3.3 water absorption ratio Ratio between the volume of water absorbed and the calculated volume of the insulating lining specimen subjected to testing. 4 Description of the means of and the equipment required for testi
26、ng 4.1 Characteristics of test pieces The dimensions of the test pieces shall be defined in accordance with the dimensions of the test rig defined in 4.2.1. The thickness of the test piece shall be the same as that of the insulating lining of the LNG impounding area. The manufacturing and installati
27、on technology of the test piece shall be the same as that of the impounding area insulating lining. The test piece shall be stored in accordance with the manufacturers recommendations. Specifically, if the material applied is concrete, the test pieces shall be built, cured and stored in compliance w
28、ith prEN 12379. 4.2 Equipment used to measure the evaporation coefficient of LNG in contact with the insulating lining 4.2.1 Test rig A test piece shall be hermetically sealed onto the base of a right-angled parallelepiped shaped tank whose sides and bottom are built of a rigid insulating material h
29、aving a thermal conductivity less than 0,050 W/(mK). The quantity of LNG necessary for the test shall be discharged over the test piece in less than 0,5 s. The discharged volume is equal to the product of the test piece surface and the desired height of LNG within a limit deviation of 5 %. After the
30、 LNG discharge, the initial height of LNG over the test piece shall be about 2,5 cm. Annex A specifies the characteristics of the test rig. NOTE. Given the different thermal behaviour of other cryogenic lquids, none of them can replace LNG to measure the evaporation coefficient. 4.2.2 Measuring equi
31、pment The evaporation coefficient of LNG in contact with the insulating lining shall be determined on the basis of continuous weighings of the tank placed on a scale, following LNG discharge over the test piece. For that purpose, an electronic scale shall be used in combination with a high-speed rec
32、order. Annex B specifies the characteristics of the measuring equipment. 4.3 Equipment used to measure the water absorption ratio of an insulating lining 4.3.1 Water tank The water tank shall be designed in such a way that the test piece is fully immersed and its six faces remain in permanent contac
33、t with water during immersion. 4.3.2 Measuring equipment The water absorption ratio of the test pieces shall be measured after successive weighings of test pieces on previously calibrated scales. The weighing scale shall be able to measure with an accuracy better than 1 %. 5 Test method 5.1 Measurem
34、ent of the evaporation coefficient of LNG in contact with the insulating lining 5.1.1 Procedure The test for the measurement of the evaporation coefficient of LNG in contact with the insulating lining shall be performed at an initial test rig temperature of (205) C and at atmospheric pressure in acc
35、ordance with the following procedure: a) install the test piece at the base of the tank; b) install the tank on the scale; c) install the LNG discharge system above the tank; Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 16:13:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 12066 :
36、1997 BSI 1998 d) fill the tip-over system; e) discharge the LNG over the test piece within a period of less than 0,5 s; f) record the tank weight at high frequency for a period of at least 2 min; g) visually inspect the test rig to verify its tightness. 5.1.2 The parameter derived from the measureme
37、nts The evaporation coefficient of LNG, Kr, in contact with the insulating lining shall be calculated in accordance with annex C, by quantifying the rate of evaporation of LNG in contact with the insulating lining under test. 5.2 Measurement of the water absorption ratio of the insulating lining 5.2
38、.1 Procedure The test for the measurement of the water absorption ratio of the insulating lining shall be performed at a temperature of (20 5) C in accordance with the following procedure: a) weigh a test piece before testing; b) immerse in water for 1 h; c) weigh after draining for 1 h; d) immerse
39、in water for one day; e) weigh after draining for 1 h; f) immerse in water for two days; g) weigh after draining for 1 h; h) repeat the last two sequences (f and g) six times. 5.2.2 Parameters derived from the measurements The water absorption ratio of the insulating lining shall be quantified by ca
40、lculating the following parameters: a) the water absorption ratio of each test piece after each weighing; b) the maximum value of water absorption ratio of the insulating lining. Annex D specifies the method of calculation of the above parameters. 6 Testing The tests shall be carried out on the thre
41、e test pieces in order to determine the evaporation coefficient of LNG in contact with the insulating lining under the following conditions: a) the insulating lining is dry as delivered by the manufacturer; b) the insulating lining is saturated with water following immersion for 15 days; c) due to t
42、he fact that the insulating material can change its characteristics under the influence of atmospheric agents such as rain, frost, ultra-violet rays etc, it is recommended to determine the evaporation coefficient of LNG after having subjected the insulating lining to an ageing procedure. In this cas
43、e, the ageing procedure shall be defined by the user and agreed by the insulating manufacturer. The simulated lifetime shall be defined by the user. 7 Test report The results of the tests shall be recorded in a report containing the following information: a) the history of the test pieces before tes
44、ting, such as storage and transportation conditions (temperature, humidity, etc), time between manufacturing and testing and conditions of sampling; b) the evaporation coefficient of LNG in contact with the insulating lining in the dry condition (see clause 6a); c) the maximum value of the water abs
45、orption ratio of the insulating lining (see 5.2.2b); d) the evaporation coefficient of LNG in contact with the insulating lining saturated with water following immersion for 15 days (see clause 6b); e) the evaporation coefficient of LNG in contact with the insulating lining following the accelerated
46、 ageing procedure, if requested (see clause 6c). Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 16:13:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 5 EN 12066 : 1997 BSI 1998 1Test piece4Quick tip-over system 2Rigid insulation material5Cover 3Tightening device6Hopper Figure A.1 Example
47、of test rig Annex A (normative) Specification of the test rig A.1 Description of the test rig The test rig shall consist of the following (see figure A.1): a tank containing the test piece; a system of LNG discharge. The materials which are likely to come in contact with LNG shall comply with the re
48、quirements of EN 1160. A.2 Specification of the tank The tank shall be designed so that its base is a square whose side is between 400 mm and 600 mm. It shall consist of plates of a rigid insulating material forming the sides and base. The test piece shall be sealed onto the base. In order to avoid
49、LNG penetration along the edges of the test piece and under the test piece, special care shall be taken when making the joints between the different tank components. A.3 Specification of the LNG discharge system The LNG discharge system shall consist of: a quick tip-over system; a cover to prevent any LNG splashing; a hopper to guide the LNG discharge into the tank. A.4 Regulations Attention is drawn to existing European Standards in the field of safety, for example prEN 50145, for the design and operation of the test