1、BRITISH STANDARD BS EN 377:1993 Incorporating Amendment No.1 Lubricants for applications in appliances and associated controls using combustible gases except those designed for use in industrial processes The European Standard EN377:1993, with the incorporation of its amendment A1:1996, has the stat
2、us of a BritishStandardBSEN377:1993 This BritishStandard, having been prepared under the directionof the Gas StandardsPolicy Committee,waspublished underthe authorityof the Standards Boardand comesintoeffect on 15August1993 BSI12-1999 The following BSI references relate to the work on this standard:
3、 Committee reference GSE/22 Draft for comment90/78081 DC ISBN 0 580 21251 3 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Oest
4、erreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technol
5、ogical Institute of Iceland Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain A
6、sociacin Espaola de Normalizacin y Certificacin Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom BritishStandards Institution Amendments issued since publication Amd. No. Date Comments 9328 December 1996 Indicated by a sideline in the margi
7、nBSEN377:1993 BSI 12-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of EN377 3 National annex NA (informative) Committees responsible Inside back cover National annex NB (informative) Cross-references Inside back coverBSEN377:1993 ii BSI 12-199
8、9 National foreword This BritishStandard has been prepared under the direction of the Gas Standards Policy Committee and is the English language version of EN377:1993 Lubricants for applications in appliances and associated controls using combustible gases except those designed for use in industrial
9、 processes, including amendment1, published by the European Committee for Standardization (CEN). EN377 was produced as a result of international discussions in which the UnitedKingdom took an active part. A British Standard does not purport to include all the necessary provisions of a contract. User
10、s of British Standards are responsible for their correct 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, pagesi andii, theEN title page, pages2 to10, an inside ba
11、ck cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN377 May1993 +A1 March1996 UDC 621.892:641.534:644.62:68
12、3.97:622.95:697.245:620.1 Descriptors: Household appliances, gas appliances, lubricants, classifications, specifications, physicochemical properties, tests English version Lubricants for applications in appliances and associated controls using combustible gases except those designed for use in indus
13、trial processes (includes amendment A1:1006) Lubrifiants destins aux appareils et quipement associs utilisant les combustibles gazeux lexception des appareils spcifiquement destins un usage industriel (inclut lamendement A1:1996) Schmierstoffe fr die Anwendung in Gerten und zugehrigen Stell-Gerten f
14、r Brenngase auer denjenigen die fr die Anwendung in industriellen Prozessen vorgesehen sind (enthlt nderung A1:1996) This European Standard was approved by CEN on1993-04-25. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Europ
15、ean Standard the status of a national standard 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,
16、 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 Central Secretariat has the same status as the official versions. CEN members are the national standard bodies of Austria, Belgium, Denmark, Finlan
17、d, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Bruss
18、els CEN1993 Copyright reserved to CEN members Ref. No. EN377:1993+A1:1996 EEN377:1993 BSI 12-1999 2 Foreword This European Standard has been prepared by Technical Committee CEN/TC108 “Sealing materials and lubricants for gas appliances and gas equipment”. This European Standard has been prepared und
19、er a mandate given to CEN by the Commission of the European Communities and the European Free Trade Association, and supports essential requirements of EC Directive(s). This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorseme
20、nt, at the latest by November1993, and conflicting national standards shall be withdrawn at the latest by November1993. In accordance with the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany,
21、 Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Foreword to Amendment A1 This Amendment EN377:1993/A1:1996 to EN377:1993 has been prepared by Technical Committee CEN/TC108, Sealing materials and lubricants for gas appliances
22、 and gas equipment, the secretariat of which is held by NNI. This Amendment to the European Standard EN377:1993 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January1997, and conflicting national standards shall be wi
23、thdrawn at the latest by January1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this Amendment: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherland
24、s, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Lubricants for applications in appliances and associated controls using combustible gases except those designed for use in industrial processes. Amendment No.1 is issued after evaluation of one year of test experience. Contents
25、Page Foreword 2 Introduction 3 1 Scope 3 2 Normative references 3 3 Classification of the lubricants 3 4 Requirements 3 5 Methods of test 3 Annex A (informative) Production of the standard reference elastomer 9 Figure 1 Overall view of the assembly 5 Figure 2 Casing 6 Figure 3 Nozzle 6 Figure 4 Nozz
26、le holder 6 Figure 5 Control gauge 6 Figure 6 Weighing glass 7 Figure 7 U shape tubes with ground stopcocks 8 Figure 8 Fixing of spring steel guard 8 Table 1 Temperature classes 3 Table 2 7 Table 3 7 Table 4 8 Table A.1 Compositions of SRE-NBR1 (inpartofmass) 9 Table A.2 Instructions for making the
27、mixture 9 Table A.3 Laboratory rolling machine 10 Table A.4 Requirements and testing 10EN377:1993 BSI 12-1999 3 Introduction This standard specifies the essential physical and chemical characteristics of lubricants to be used in gas and associated controls appliances using combustible gases except t
28、hose designed for use in industrial processes. Judgement on the suitability of the use of these lubricants for any given equipment is not the object of the present standard. This has to be verified by functional tests laid down in the appropriate appliance or control standards. Notwithstanding the l
29、imits of operating temperature covered by this standard, it may be necessary to check any specific operating temperature by functional testing and compatibility trials. The lubricants covered by this standard are compatible with copper and copper alloys. Compatibility with other metals e.g.aluminium
30、 and aluminium alloys (which might be corroded by alkaline soaps) has to be confirmed by long term functional tests at the maximum working temperature. This standard contains an informative Annex A on the preparation of a standard reference elastomer used for testing the compatibility with elastomer
31、s. 1 Scope This standard specifies requirements and methods of test for lubricants to be used in gas appliances of all categories including auxiliary equipment mounted or intended to be mounted on such appliances and which may be in contact with combustible gases, except those designed for use in in
32、dustrial processes. 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 hereafter. For dated references, subsequent ame
33、ndments to or revisions of any of these publications apply to this European Standard. For undated references the latest edition of the publication referred to applies. ISO1817:1985, Rubber, vulcanized Determination of the effect of liquids. ISO2160:1985, Petroleum products Corrosiveness to copper Co
34、pper strip test. ISO3219:1977, Plastics Polymers in the liquid, emulsified or dispersed state Determination of viscosity with a rotational viscometer working at defined shear rate. ISO6743-9:1987, Lubricants, industrial oils and related products (class L) Classification Part9: Family X (Greases). 3
35、Classification of the lubricants The manufacturer shall declare the temperature class of the lubricant as given in Table 1. 4 Requirements 4.1 Behaviour at low temperature The flow pressure of the lubricant, determined according to5.1, shall not exceed1500mbar. 4.2 Behaviour at high temperature The
36、loss in mass of the lubricant, tested according to5.2, shall not exceed8% of the initial value. Table 1 Temperature classes In addition, the apparent dynamic viscosity of the lubricant shall not be increased by more than100% or decreased by more than50% compared with the initial value. 4.3 Resistanc
37、e to gas The increase in mass of the lubricant in gaseous butane, tested according to5.3, shall not exceed10% of the initial value. 4.4 Compatibility with copper The appearance of copper test strips tested in accordance with5.4 shall give a classification2 or less for all classes in accordance with
38、clause5 of ISO2160:1985 when compared with the reference strips. 4.5 Compatibility with elastomers The increase in volume of the standard reference nitrile elastomer, tested in lubricant according to5.5, shall not exceed10% of the initial value. The maximum change in hardness is10IRHD. 5 Methods of
39、test 5.1 Behaviour at low temperature 5.1.1 Principle The method consists of determining the relative flow pressure of the lubricant at0 C, that is to say, the pressure required for complete expulsion of the lubricant contained in a nozzle. Range of operating temperature ( C) From to 0 60 0 90 0 120
40、 0 140 0 160 Class A B C D EEN377:1993 4 BSI 12-1999 5.1.2 Apparatus (Figure 1) The apparatus comprises a tube in the shape of a cross made from glass or metal, with a nozzle and its holder at the end of the lower tube section and a stopper with a hole for the thermometer at the top end of the upper
41、 tube section complete with holder. One of the lateral tube sections is connected to an air supply under pressure, the other to a pressure gauge. These different components are described below. Nozzle The nozzle (Figure 3) is a steel cylinder having a collar and with an orifice in the form of a trun
42、cated cone. It is mounted in a nozzle holder (Figure 4) which, in turn, screws onto a brass casing (Figure 2) retained with a suitable glue. Thermometer The thermometer measures the test temperature with an accuracy of 1 C. It is inserted into the vertical section of the test apparatus where it is h
43、eld in position by a rubber stopper through which it passes and which fits into the enlarged section of the tube thus locating the thermometer in the centre of the triangular orifice at the entry to the nozzle in conjunction with the casing. Control gauge This accessory (Figure 5) is used to positio
44、n the lower part of the thermometer in the casing. Pressure gauge up to1500mbar having readabilityu5mbar. Test tube with a diameter of around25mm and a height of130mm to accept the lower part of the equipment with the nozzle. It is closed by a perforated and split rubber stopper. Liquid bath with co
45、ver, containing a liquid, the temperature of which can be controlled to(0 1) C. The bath cover shall have an opening through which the lower part of the test apparatus (N.B. Inserted into the test tube) can be immersed into the temperature controlled liquid to a depth of at least65mm. Chronometer, t
46、olerance1s. Cotton lint or absorbent paper Glass plate Source of compressed air 5.1.3 Method of operation Clean the base of the apparatus and the nozzle carefully with cotton lint or absorbent paper without using solvents. The thermometer is mounted as shown in Figure 1 and adjusted by means of the
47、control gauge which is inserted into the apparatus through the nozzle for a length of21mm. The lower step of the gauge is positioned level with the exit of the nozzle. The lower end of the thermometer shall touch the upper end of the gauge. Remove the nozzle. Fill the nozzle by spreading lubricant o
48、n the glass plate as a bubble free layer and placing the nozzle on this bed of lubricant with the large opening underneath, pressing until it contacts the glass plate.The nozzle should then be separated from the glass plate by lateral movement and the operation repeated until lubricant is emitted fr
49、om the smaller opening. Excess lubricant is removed with a spatula. Assemble the apparatus with the nozzle arranged as in Figure 1 and insert the lower part into the test tube. Connect one of the laterals to the pressure source and the other to the pressure gauge. Condition the apparatus at a temperature of(0 1) C for(2,5 0,5)h in the liquid bath. Raise the pressure by stages of25mbar every30s. The flow pressure is defined as being the highest level of pressure reached,
