1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 977 : 1998 The Euro
2、pean Standard EN 977 : 1997 has the status of a British Standard ICS 23.020.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Underground tanks of glass-reinforced plastics (GRP) Method for one side exposure to fluidsThis British Standard, having been prepared under the direc
3、tion of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 January 1998 BSI 1998 ISBN 0 580 28936 2 BS EN 977 : 1998 Amendments issued since publication Amd. No. Date Text affected National foreword This British Standard
4、 is the English language version of EN 977 : 1997. The UK participation in its preparation was entrusted to Technical Committee PRI/64, GRP tanks for underground petrol storage, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any e
5、nquiries 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. Cross-references The
6、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 Catalogue. Complian
7、ce 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 6, an inside back cover and a back cover.CEN European Committee for Standardization Comite Europe en de N
8、ormalisation 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 977 : 1997 E EUROPEAN STANDARD EN 977 NORME EUROPE ENNE EUROPA ISCHE NORM
9、July 1997 ICS 23.020.10 Descriptors: Petroleum products storage, storage tanks, underground tanks, thermosetting resins, reinforced plastics, glass reinforced plastics, tests, determination, chemical resistance English version Underground tanks of glass-reinforced plastics (GRP) Method for one side
10、exposure to fluids Re servoirs enterre s en plastiques renforce s de verre (PRV) Me thode dexposition unilate rale dune plaque aux fluides Unterirdische Tanks aus textilglasversta rkten Kunststoffen (GFK) Pru fanordnung zur einseitigen Beaufschlagung mit Fluiden This European Standard was approved b
11、y CEN on 1997-06-21. 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 national standards
12、 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 and notified to the
13、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, Switzerland and United Ki
14、ngdom.Page 2 EN 977 : 1997 BSI 1998 Foreword This European Standard has been prepared by Technical Committee CEN/TC 210, GRP tanks and vessels, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text
15、 or by endorsement, at the latest by January 1998, and conflicting national standards shall be withdrawn at the latest by January 1998. This standard is drafted in support of EN 976-1 and EN 976-3, Horizontal cylindrical tanks for the non-pressure storage of liquid petroleum based fuels Part 1: Requ
16、irements and test methods for single wall tanks and Part 3: Requirements and test methods for double wall tanks, in order to assess the chemical resistance of the GRP tank laminate. According to CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bou
17、nd to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Principle 3 3 Apparatus 3 4
18、 Test parameters 3 5 Test specimens 3 6 Procedure 3 7 Test report 5Page 3 EN 977 : 1997 BSI 1998 1 Scope This European Standard specifies a method for the one side exposure to fluids of samples of tanks of glass reinforced thermosetting resins for the underground storage of liquids. 2 Principle The
19、inner surface of test specimens taken from the tank wall is exposed at a specified temperature for a given period of time to the liquid and vapour phase of a test liquid. 3 Apparatus Modifications in the construction of the apparatus as given hereafter are allowed, provided that the essence of the t
20、est is not affected. The apparatus (see figure 1) consists of a glass cylinder with a diameter of 140 mm to 150 mm and a height of 150 mm. The cylinder contains two connections at an angle of 45, one for a backflowcooler (1) and one for the adjustment of a thermometer (2). Further parts are the join
21、t for the backflowcooler and the backflowcooler itself. These parts are not given in figure 1 since they are readily available items. The glass parts of the apparatus shall be made of glass resistant to temperature changes. Two test specimens serve as top and bottom of the glass cylinder. They are s
22、ealed against the polished rims of the cylinder with rings, e.g. PTFE. The sealing is adapted to the shape of the samples. The test specimens are clamped to the glass cylinder between two flanges by means of six threaded rods with butterfly nuts. It is recommended to apply a spacer ring between each
23、 pressure flange and the test specimen. (These spacer rings are not detailed in figure 1). The glass cylinder is heated from the outside with an automatic controlled heating system. The temperature is measured in the test liquid. The heating system shall be capable of keeping the temperature of the
24、test liquid to within 1 K of the specified temperature. 4 Test parameters The test parameters (temperature, exposure time and test liquid composition) are given by the relevant product standard. 5 Test specimens Take three representative hexagonal test specimens from the tank wall. Reserve one of th
25、e test specimens for the determination of the initial value(s) of the characteristic(s) defined by the relevant product standard, the other two for exposure to the liquid and vapour phase of the test liquid. Mark the longitudinal and circumferential direction of the cylindrical part on the outside o
26、f the test specimen. In case of a sandwich construction the test specimens are taken from the inner GRP laminate. NOTE. If a different exposure apparatus is used, different form and dimensions of test specimens may be necessary. 6 Procedure 6.1 Clamp two test specimens in the apparatus with the inne
27、r layer to the inside. When necessary, adapt the rings to the shape of the test specimens. 6.2 Fill half of the glass cylinder with the test liquid (approximately 1200 ml in the case of the figure 1 cylinder). 6.3 Increase gradually the temperature of the liquid to the specified temperature. Maintai
28、n that temperature to within 1 K over the complete exposure period. 6.4 During the test, replace the test liquid as required by the relevant product standard. 6.5 At the end of the exposure time cool the test liquid down to (23 5) C and remove the liquid from the cylinder. 6.6 Take the two test spec
29、imens out of the apparatus and rinse them with distilled water. Remove non-water soluble liquids with a solvent that does not affect the test specimen (e.g. white spirit). NOTE. Mechanical cleaning of the test specimens is not allowed, given the risk of damaging the surface. 6.7 Dry the test specime
30、ns in air at a temperature of (23 5) C. 6.8 Determine on the exposed test specimens the characteristic(s) as required by the relevant product standard within 24 h of removal of the test specimens from the test apparatus.Page 4 EN 977 : 1997 BSI 1998 All dimensions in millimetres 1 Flange 5 Connectio
31、n tube 9 Gasket (e.g. PTFE) 2 Test specimen (gas phase) 6 Glass cylinder 10 Test specimen (liquid phase) 3 Gasket (e.g. PTFE) 7 Liquid level 11 Flange 4 Six threaded studs M63 200 with butterfly nuts 8 Heating element Figure 1. Apparatus for exposure to liquidsPage 5 EN 977 : 1997 BSI 1998 7 Test re
32、port The test report shall at least indicate: a) a reference to this European Standard; b) the full identification of the tank from which the test specimens are taken: name of producer and production place; build up of the material, name and type of the material; tank marking, including production c
33、ode; dimensions of the test sample; c) any deviation from the exposure apparatus as specified in this European Standard; d) the test parameters (test temperature, exposure time, drying time and test liquid composition); e) individual values and mean values of the characteristic(s) determined on expo
34、sed and unexposed test specimens, as well as the change of the mean value in percentage; f) any deviation from the test procedure specified in this standard; g) any details, which have not been provided for by this test procedure, and any accidental circumstances which might have affected the result
35、s; h) the date(s) of testing.BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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