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 areasThis British Standard,
3、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 28980 X BS EN 12066 : 1998 Amendments issued since publication Amd. No. Date Text affected National forewor
4、d 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 LNG, which has the responsibility to: aid enquirers to understand the text; present to the responsible Europ
5、ean 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 UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cr
6、oss-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 International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic
7、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 title page, pages 2 to 8, an inside back cover and a back cover.CEN European Committee for Standardization Co
8、mite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: 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 STANDARD EN 12066 NORME EUROPE
9、 ENNE EUROPA ISCHE NORM September 1997 ICS 75.200 Descriptors: Gas installation, liquefied natural gas, vats, protective coatings, insulation, evaporation, water bath evaporation, operating requirements, tests, test equipment, measurements, coefficients, computation English version Installations and
10、 equipment for liquefied natural gas Testing of insulating linings for liquefied natural gas impounding 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 ssigerdga
11、s Pru fung von Wa rmedammbeschichtungen fu r Flu ssigerdgas-Auffanbecken This European Standard 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 s
12、tandard without any alteration. Up-to-date lists and bibliographical references concerning such 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 othe
13、r language made by translation under the responsibility of a CEN member into its own language and 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, Gr
14、eece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.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 secretariat of whic
15、h 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/CENELEC Inte
16、rnal 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, Switzerland
17、 and the United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Definitions 3 4 Description of the means of and the equipment required for testing 3 4.1 Characteristics of test pieces 3 4.2 Equipment used to measure the evaporation coefficient of LNG in contact with the insula
18、ting lining 3 4.3 Equipment used to measure the water absorption ratio of an insulating lining 3 5 Test method 3 5.1 Measurement of the evaporation coefficient of LNG in contact with the insulating lining 3 5.2 Measurement of the water absorption ratio of the insulating lining 4 6 Testing 4 7 Test r
19、eport 4 Annexes A (normative) Specification of the test rig 5 B (normative) Measuring equipment used to determine the evaporation coefficient of LNG in contact with the insulating lining 6 C (normative) Method of calculation of the evaporation coefficient of LNG in contact with the insulating lining
20、 6 D (normative) Method of calculation of the water absorption ratio of insulating lining 7Page 3 EN 12066 : 1997 BSI 1998 1 Scope This European Standard specifies the tests to be carried out in order to assess the suitability of insulating linings used in LNG impounding areas. 2 Normative reference
21、s 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 hereafter. For dated references, subsequent amendments to or revisions of any of these p
22、ublications 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 1160 Installations and equipment for liquefied natural gas General characteristics of liquefied natural gas prEN 123
23、79 Testing 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 Material or layers of materials designed to minimize evaporation of an LNG pool. 3.3
24、 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 testing 4.1 Characteristics of test pieces The dimensions of the test pieces shall be defi
25、ned 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 installation technology of the test piece shall be the same as that of the impounding area insu
26、lating 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 with prEN 12379. 4.2 Equipment used to measure the evaporation coefficient of LNG in c
27、ontact 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 having a thermal conductivity less than 0,050 W/(mK). The quantity of LNG necessary fo
28、r 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 LNG discharge, the initial height of LNG over the test piece shall be about 2,5 cm.
29、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 equipment The evaporation coefficient of LNG in contact with the insulating lining shall
30、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 recorder. Annex B specifies the characteristics of the measuring equipment. 4.3 Equipmen
31、t 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 contact with water during immersion. 4.3.2 Measuring equipment The water absorption ratio o
32、f 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 Measurement of the evaporation coefficient of LNG in contact with the insulating lining 5.1.1
33、 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 (20 5) C and at atmospheric pressure in accordance with the following procedure: a) install the test piece at the base of the t
34、ank; b) install the tank on the scale; c) install the LNG discharge system above the tank;Page 4 EN 12066 : 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 m
35、in; g) visually inspect the test rig to verify its tightness. 5.1.2 The parameter derived from the measurements The evaporation coefficient of LNG, K r , in contact with the insulating lining shall be calculated in accordance with annex C, by quantifying the rate of evaporation of LNG in contact wit
36、h the insulating lining under test. 5.2 Measurement of the water absorption ratio of the insulating lining 5.2.1 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
37、) weigh a test piece before testing; b) immerse in water for 1 h; c) weigh after draining for 1 h; d) immerse 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 Paramete
38、rs derived from the measurements The water absorption ratio of the insulating lining shall be quantified by calculating 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 spe
39、cifies the method of calculation of the above parameters. 6 Testing The tests shall be carried out on the three 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 t
40、he manufacturer; b) the insulating lining is saturated with water following immersion for 15 days; c) due to the 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 e
41、vaporation coefficient of LNG after having subjected the insulating lining to an ageing procedure. In this case, 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 sh
42、all be recorded in a report containing the following information: a) the history of the test pieces before testing, 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
43、contact with the insulating lining in the dry condition (see clause 6a); c) the maximum value of the water absorption 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 cla
44、use 6b); e) the evaporation coefficient of LNG in contact with the insulating lining following the accelerated ageing procedure, if requested (see clause 6c).Page 5 EN 12066 : 1997 BSI 1998 1 Test piece 4 Quick tip-over system 2 Rigid insulation material 5 Cover 3 Tightening device 6 Hopper Figure A
45、.1 Example 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
46、with the requirements 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 orde
47、r to avoid 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 t
48、o 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 rig.Page 6 EN 12066 : 1997 BSI 1998 Annex B (normative) Measuring
49、 equipment used to determine the evaporation coefficient of LNG in contact with the insulating lining B.1 Specification of the scale The scale used to determine the evaporation coefficient of LNG in contact with the insulating lining shall have the following specification: a) sensitivity: 53 10 23 kg; b) indicator precision: 53 10 23 kg; c) frequency of measurement: at least 20 Hz. B.2 Specification of related recorder The recorder connected to the scale may be of the magnetic or digital tape reco
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