EN 377-1993 en Lubricants for Applications in Appliances and Associated Controls Using Combustible Gases Except Those Designed for Use in Industrial Processes (Incorporates Amendme.pdf

1、STDmBSI BS EN 377-ENGL 1793 1b24bbS 05733bb OLi3 = BRITISH STANDARD Lubricants for applications in appliances and associated controls using combustible gases except those designed for use in industrial processes * * rn The European Standard EN 377 : 1993, with the incorporation of its amendment Al :

2、 1996. has the status of a British Standard BS EN 377 : 1993 Incolpora,ting Amendment No. 1 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITED BY COPYRIGHT LAW STD.BS1 BS EN 377-ENGL 1773 1b2Libb7 05733b TAT Amd. No. Date BS EN 377 : 1993 Issue 2, December 1996 Rxt affected Cooperating organizatio

3、ns The European Committee for Standardization (CEN), under whose supervision this European Standard was prepamd, cumprices the national standards organizations of the following countries: Austria Belgium Denmark Finland France Germany Greece Iceland Ireland Italy Luxembourg Netherlands Norway Portug

4、al Spain Sweden Switzerland United Kingdom Oesterreichisches Normungsinstitut Institut belge de normalisation Dansk Standardiseringsraad Suomen Standardisoimisliito, r. y. Association franaise de normalisation Deutsches Institut fr Normung e.V. Hellenic Organization for Standardization Ethnological

5、Institute of Iceland National Standards Authority of Ireland Ente Nazionale Italiano di Unificazione Inspection du Travail et des Mines Nederlands Normalisatie-instituut Norges Standardiseringsforbund Instituto Portugus da Qualidade Asociacin Espaola de Normalizacin y Certificacin Standardiseringsko

6、mmissionen i Sverige Association suisse de normalisation British Standards Institution This British Standard, having been prepared under the direction of the Gas Standards Policy Committee. was published under the authority of the Standards Buad and cornes into effect on 1.5 August 1W3 E BI lW3 9328

7、 Indicated by a sideline in the margin I The following 1987 Lubricam, industricd oils and ClassifiCath -Part 9 : Family X (Greases) related products (clzSs L) - 3 Classification of the lubricants The manufacturer shall declare the temperature class of the lubricant as given in table 1. 4 Requirement

8、s 4.1 Behaviour at low temperature The flow pressure of the lubricant, determined according to 5.1 , shall not exceed 1500 mbar. 4.2 Behadour at high temperature The loss in mass of the lubricant, tested according to 6.2, shall not exceed 8 % of the initiai Value. 5.1.2Apparatus (figure 1) The appar

9、atus 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 tube section complete with holder. One of the lateral tube sections is connected to an a

10、ir supply under pressure, the other to a pressure gauge. These different components are described below. - NOZZ The nozzle (figure 3) is a steel cylinder having a collar and with an orifice in the form of a truncated cone. It is mounted in a nozzle holder (figure 4) which, in turn, screws onto a bra

11、ss casing (figure 2) retained with a suitable glue. -ThermOmem The thermometer measures the test temperature with an accuracy of I 1 C. It is inserted into the vertical section of the test apparatus where it is heid in position by a rubber stopper through which it passes and which fits into the enla

12、rged section of the tube thus locating the thermometer in the centre of the triangular orifce at the entry to the nozzle in conjunction with the casing. Q BSI 1996 STD.BS1 BS EN 377-ENGL 1773 m LbZLibb7 0573375 283 Page 4 EN 377 : 1993 I O vi U O aD n it CD I- 1 $10 I J 60 Suitable glue t- 5 6 7 8 P

13、arts Ilst: 1. Thermometer 2. Holder 3. Stopper 4. Glass or metal tube 5. Casing fxed with glue 7. Nozzle holding unit 8. Nozzle 6. O-ring Dimensions in mm Figure 1. Overall view of the assembly STD-ES1 BS EN 377-ENGL 1993 m Lb24bb9 057337b LIT m Page 5 EN 377 : 1993 Milled Slightly round triangle po

14、ints Dimensions in mm Figure 2. Casing 81620 1 Hot crimped steel ring Dimensions in mm Figure 3. Nozzle - Control gauge This accessory (figure 5) is used to position the lower part of the thermometer in the casing. - Pressure gauge up to 1500 mbar - having readability 5 mbar. Milled Dimensions in mm

15、 Figure 4. Nozzle holder -i 92 1IL i I =i= Dimensions in mm Figure 5. Control gauge - Test tube with a diameter of around 25 mm and a height of 130 mm to accept the lower part of the equipment with the nozzle. It is closed by a perforated and split rubber stopper. -Liquid bath with cover, containing

16、 a liquid, the temperature of which can be controlled to- (O f 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 least 65 nun. - Chromter, tolerance

17、 f 1 s. - Cotton lint or absorbent paper - Glass plate - Source of compressed air STD-BSI BS EN 377-ENGL 1773 m LbZLibb7 0573377 05b class A B C D E Page 6 EN 377 : 1993 Temperature (OC) 90 * 1 120 f 2 150 f 2 170 f 2 190 I2 5.1.3 Method of operation Clean the base of the apparatus and the nozzle ca

18、refully with cotton lint or absorbent paper without using solvents. The thermometer is mounted as shown in figure 1 and adjusted by means of the control gauge which is inserted into the apparatus through the nozzle for a length of 21 mm. The lower step of the gauge is positioned level with the exit

19、of the nozzle. The lower end of the thermometer shall touch the upper end of the gauge. Remove the nozzle. Fii the nozzle by spreading lubricant on 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

20、 glass plate. The nozzle should then be separated from the glass plate by lateral movement and the operation repeated until lubricant is emitted from the smalier opening. Excess lubricant is removed with a spatula. Assemble the apparatus with the nozzle arranged as in figure 1 and insert the lower p

21、art 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 (O f 1)“C for (2,5 f 0,5) h in the liquid bath. Raise the pressure by stages of 25 mbar every 30 s. The flow pressure is defined as being the hi

22、ghest level of pressure reached, corresponding to the complete expulsion of the lubricant from the nozzle. 5.2 Behaviour at high temperatures Three weighing devices consisting of two ground glass discs of 60 mm diameter (figure 6) are cleaned with acetone and weighed. (1 f 0,05) g of the lubricant i

23、s equally distributed on both parts of the devices by circling movements. Then both discs are separated by lateral movement to give a smooth lubrication fiim. The lubricant samples are weighed to 1 mg and placed for (24 $,J h in a normal oven at temperatures as shown in table 2. The change in mass w

24、ith reference to the initial mass of the samples is determined after the devices have cooled down to ambient temperature in a desiccator containing calcium chloride. Use the arithmetic mean value of the three results obtained. The change of the viscosity is determined on lubricant samples which were

25、 stored in the same manner at temperatures shown in table 3. The test method is that of cone and plate described in IS0 3219 with the following parameters: - Temperature (23 f 0,2) OC; - Shear rate 250 s-l. The values are read off after a rotation period of 30 s and compared with the initiai value.

26、Use the arithmetic mean value of the three results obtained. class A B C D E ni 1 Temperature (OC) 60 k 1 90 f 1 120 f 2 140 f 2 160 f. 2 L UJ 60t1 Dimensions in mm Figure 6. Weighing glass STDeBSI BS EN 377-ENGL 1773 = Lb24bb7 0573378 T72 Page 7 EN 377 : 1993 5.3 Resistance to gas The mass increase

27、 of the lubricant in gaseous butane (2 99,5 96 n-butane by mass) is determined in a U-tube with ground stopcocks, see figure 7. Each side of the U-tube contains an alMum strip 1 10 m X 10 mm X 0,5 mm. The stopcocks are greased with the lubricant to be tested in such a way that no lubricant comes out

28、 from the ground glass. The stopcocks should be protected against over pressure inside the U-tube by means of a guard or a steel spring (e.g. figure 8). The mass (mi) of the U-tube prepared in this way is determined to 1 mg. Afterwards the U-tube is flushed free of air in a thermostatically controll

29、ed water bath at (20 k 1) “C for 10 minwith butane (about 150 dmin). Thereafter the outlet stopcock is closed and the pressure is adjusted to the absolute test pressure of (1065 f 5) mbar. After temperature equalization (about 2 min) the inlet stopcock is closed and the mass (mz) of the carefully dr

30、ied U-tube is determined. The U-tube is opened and flushed with air. A total mass of (2,O f O, 1) g of lubricant is equaily spread on both sides of the aluminium strips leaving 10 mm at the end free of lubricant for handling by forceps. The exact amount of lubricant is the difference between the mas

31、s of the U-tube with the coated aluminium strips (m3) and the mass mi. After flushing the U-tube free of air in the prescribed manner let butane under an absolute pressure of (1065 f 5) mbar at (20 f 1) “C act on the lubricant sample for 1 h and determine thereafter the mass of the U-tube (m4) under

32、 test pressure analogous to m2. Such 1 h loading tests with subsequent weighing are repeated until the mass (m4) differs by not more than 2 mg from the previous measured value. Note that care should be taken that the gas lies are frst flushed free of air and adjusted to the prescribed test pressure,

33、 before opening the inlet stopcock of the U-tube again. Dimensions in mm Figure 7. U shape tubes with ground stopcocks - STD-BSI BS EN 377-ENGL 1773 Lb2LIbb7 0573377 72: Page 8 EN 377 : 1993 ,Strip steel Dimensions in mm Figure 8. Fixing of spring steel guard The absorption (B) by the lubricant of b

34、utane is calculated as mass % from the mcurimum value of mass m4 according to the following equation: (m4 - m,) - (m3 - m,) (m3 - m,) B= 5.4 Compatibility with copper The test is carried out in accordance with IS0 2 160 using the method described for lubricants (8.1.6) with the special condition, sh

35、own in table 4. The test period is (24 1978 Detemination of the viscosity of polymrs in the liquid, emulsified or dispersed state using a rotational viscometer working at a 1987 Detemirmtion of the effect of liquids STDaBSI- BS EN 377-ENGL 1773 Lb2qbb7 0573383 35T BS EN 377 : 1993 BSI 2 Park Street

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45、r, Publications at Milton Keynes. ISBN O 580 21261 3 GSE/22 STD-BSI BS EN 377-ENGL 1773 Lb24bb7 O573384 27b W AMD 9328 Amendment No. 1 published and effective from 15 December 1996 to BS EN 377 : 1993 Lubricants for applications in appliances and associated controls using combustible gases except th

46、ose designed for use in industrial processes Instructions for replacement of pages Where only one of the two pages on each sheet has been updated, the other page has been reprinted. Front cover and inside front cover Replace the pages aandb Insert the pages immediately after the inside front cover i

47、andii Replace the pages EN cover page and page 2 Replace the pages 3and4 Replace the pages You may wish to retain the superseded pages, e.g. for reference purposes, if so please mark them Superseded by issue X, where X is the appropriate issue number. If you do not wish to retain the superseded page

48、s, please destroy them. STD-BSI BS EN 377-ENGL 1793 m lb2LIbb9 0573385 122 m BRITISH STANDARD Lubricants for applications in appliances and associated controls using combustible gases except those designed for use in industrial processes The European Standard EN 377 : 1993, with the incorporation of

49、 its amendment Al : 1996, has the status of a British Standard BS EN 377 : 1993 roomtiw Arnenmt No. 1 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW STD-BSI BS EN 377-ENGL 1773 m 1b2ibbS 057338b Ob7 m Date December BSEN377: 1993 Issue 2, December 1996 - Rxt affected Indicatexi by a sideline in the margin 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: