1、BRITISH STANDARD BS5540-3: 1978 Specification for Evaluating particulate contamination of hydraulic fluids Part 3: Methods of bottling fluid samples UDC 665.767:621.22.011:620.168.2BS5540-3:1978 This British Standard, havingbeen prepared under thedirection of the Mechanical Engineering Standards Com
2、mittee, was published underthe authority of the Executive Board on 28February1978 BSI 07-1999 The following BSI references relate to the work on this standard: Committee reference MEE/186 Draft for comment 77/72500 DC ISBN 0 580 10116 9 Cooperating organizations The Mechanical Engineering Standards
3、Committee, under whose direction this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: Associated Offices Technical Committee Department of Transport Association of Consulting Engineers Electricity Suppl
4、y Industry in England and Association of Hydraulic Equipment Wales* Manufacturers* Engineering Equipment Users Association* Association of Mining, Electrical and Federation of Manufacturers of Construction Mechanical Engineers Equipment and Cranes* British Compressed Air Society* Health and Safety E
5、xecutive* British Electrical and Allied Manufacturers Institution of Gas Engineers Association (BEAMA) Institution of Mechanical Engineers* British Gas Corporation Institution of Plant Engineers British Gear Manufacturers Association Institution of Production Engineers British Internal Combustion En
6、gine London Transport Executive Manufacturers Association Machine Tool Trades Association* British Pump Manufacturers Association Ministry of Defence* British Steel Corporation National Coal Board* Chartered Institution of Building Services Process Plant Association Crown Agents for Oversea Governme
7、nts and Railway Industry Association of Great Administrations Britain Department of Industry (Mechanical Society of Motor Manufacturers and Traders Engineering) Limited* Department of Industry (National Telecommunication Engineering Part 2:1978 ISO4402:1977: Method of calibrating liquid automatic pa
8、rticle-count instruments (using AC Fine Test Dust contaminant). Additional Parts implementing further international standards will be published in due course. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for the
9、ir 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, pages1 and 2, an inside back cover and a back cover. This standard has been updated (see
10、copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS5540-3:1978 BSI 07-1999 1 1 Scope Procedures are described for obtaining bottle samples of hydraulic fluid from fluid power systems and containers for subsequent proces
11、sing and evaluation by any approved method. Two preferred methods are described as follows. a) Bottle sampling from operating systems via sampling valves (dynamic source). b) Bottle sampling from static sources, i.e.containers which can be agitated. A further, non-preferred, method is described for
12、bottle sampling from reservoirs in functional systems which have no sampling valve. 2 Reference The title of the publication referred to in this standard is given on inside back cover. 3 Bottle sampling from operating systems 3.1 Introduction. This method involves the taking of bottle samples of hyd
13、raulic fluid from operating fluid power systems via sampling valves provided for that purpose. As it is important that the fluid samples should represent a functioning condition of the hydraulic power system, they should, for comparison purposes, be taken at the same location of each type of system.
14、 To satisfy this requirement the designer should specify strategic sampling points, which should preferably be at a point of turbulence. It is desirable that the sampling point should be a valve which is permanently installed. Care should be exercised, when laying down the sampling procedure, to ens
15、ure that the sample is not affected by filters or external pumping systems connected to the system for maintenance purposes. It is important that significant operational demands be made on the system during the period that the sample is being taken. 3.2 Equipment. The following equipment shall be pr
16、ovided. a) A sampling valve which is so designed that it does not retain or generate particulate matter, either by mechanical means or by erosion of parts subjected to high velocity flow conditions. The valve or any tubing shall be suitably capped or protected to prevent the ingress of particulate m
17、atter when not in use. b) A sampling bottle, which should be of round clear glass having approximately250 ml capacity, wide mouthed and fitted with a polypropylene threaded cap. A closure provided with a suitable internal liquid resistant seal (e.g.clean plastics film or premoulded insert) are suita
18、ble alternatives. c) Distilled or demineralized water. d) A liquid detergent, which is water soluble. e) Propan-2-ol isopropyl alcohol (IPA) reagent grade, 0.45 4m membrane filtered. f) Petroleum ether, boiling range100 C to120 C, or a suitable non-flammable solvent,0.454m membrane filtered. 3.3 Pre
19、paration and cleaning of equipment. The sampling valve shall be kept protected by a protection cap at all times when it is not in use. Prior to extracting the sample, the sample bottle and closure shall be cleaned by employing the following procedure. a) Wash with warm tap water containing detergent
20、. b) Rinse with warm tap water. c) Rinse with distilled or demineralized water. d) Rinse thoroughly with filtered propan-2-ol. e) Rinse thoroughly with filtered solvent as defined in3.2 f). f) Allow to drain for a few seconds, then fit the cap under clean conditions; alternatively, allow the bottle
21、to dry before fitting cap. It is recommended that bottles be cleaned to achieve a blank count of less than500 particles above5m per bottle by the counting method which will ultimately be used to count the hydraulic fluid sampled. A standard procedure for qualifying and controlling cleaning methods f
22、or hydraulic fluid sample containers is described in BS5540-1. 3.4 Method of sampling 3.4.1 Take a sample of hydraulic fluid under the conditions prescribed by the system designer (see3.1). Prior to taking the sample, the exterior of the sampling valve and the adjacent parts shall be thoroughly clea
23、ned. 3.4.2 Take a clean, sealed sample bottle. Inspect to ensure that no loose matter lies in the region of the closure. Loosen the closure, but do not remove, and place the bottle in a convenient position. 3.4.3 Remove the protection cover from the sampling valve or tubing, open and bleed off at le
24、ast twice the volume of the sampling line, but not less than100ml, of fluid into a waste container in order to flush the sampling system.BS5540-3:1978 2 BSI 07-1999 3.4.4 Remove the closure from the bottle and, without interrupting the flow from the valve, substitute the bottle for the waste contain
25、er. Collect a sufficient volume of sample (at least150 ml) relevant to the subsequent processing method and then remove the sample bottle (and replace the waste container). 3.4.5 Reinstall the bottle closure and seal. 3.4.6 Close the sampling valve and replace protection. 3.5 Data record. Label the
26、bottle sample with the following information. a) Sample reference number. b) Location of sample source. c) Sampling method. d) Date and time of sampling. e) Fluid type. f) Processing method to be used. g) Comment/notes, if any. 4 Bottle sampling from containers 4.1 Introduction. This method involves
27、 the taking of bottle samples of hydraulic fluid from containers which can be agitated. 4.2 Equipment. The following equipment shall be provided: a) as listed in3.2 b) to f) inclusive; b) lint free wipers; c) precleaned plastics film. 4.3 Preparation and cleaning of equipment. Prior to extracting th
28、e sample, the sample bottle and container shall be cleaned by employing the following procedure. a) Clean and check the sample bottle as specified in3.3. b) Wipe clean and wash down with filter solvent see3.2 f) the external surfaces of the container adjacent to the filler cap, paying particular att
29、ention to the area from which the sample will be taken. 4.4 Method of sampling a) Ensure that the sample is representative by vigorously agitating the fluid within the container. b) Directly the container is ready, remove the sealing cap and sample by pipette (see5.4) or pour at least100 ml to waste
30、 and then, without interrupting the flow, substitute the sample bottle for the waste container. c) Collect a sufficient volume of sample (at least150 ml) relevant to the subsequent processing method and then remove the sample bottle. d) Reinstall the bottle closure and seal. e) Cover or reseal the t
31、op of the container with precleaned plastics film in the event of further samples being required. 4.5 Data record. Label the bottle sample in accordance with3.5. 5 Bottle sampling from reservoirs 5.1 Introduction. This method involves the taking of samples from reservoirs in systems which do not hav
32、e sampling valves. It is non-preferred and should be carried out only if no other means are available. When adopting this method, it is preferable that it be carried out whilst the system is functioning. If this is not feasible, sampling should be carried out immediately on shut down. Samples shall
33、not be taken from any drain points. 5.2 Equipment. The following equipment shall be provided: a) as listed in3.2 b) to f) inclusive; b) a glass pipette of suitable length to reach below the surface of the fluid. 5.3 Preparation and cleaning of equipment. Prepare and clean the sampling bottle and pip
34、ette as specified in3.3, and additionally prepare and clean the external surface of the reservoir as specified in4.3 b). 5.4 Method of sampling a) Remove the reservoir filler cap and strainer and insert the pipette to reach the approximate mid depth of the fluid. b) Ensure the pipette does not come
35、in contact with the sides of either the filler or the reservoir, or approach the bottom of the reservoir. c) Withdraw the pipette, dispense the contents into the sample bottle, and collect a sufficient volume of sample (at least150ml) relevant to the subsequent processing method. d) Reinstall the bo
36、ttle closure and seal. e) Replace the filler cap and strainer. 5.5 Data record. Label the bottle sample in accordance with3.5.BS5540-3:1978 BSI 07-1999 Publication referred to BS5540, Specification for evaluating particulate contamination of hydraulic fluids. BS5540-1, Qualifying and controlling of
37、cleaning methods for sample containers. BS5540-3: 1978 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the international level. It is incorpo
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