ISO Method of extraction of contaminants by agitation. ISO Method of extraction of contaminants by pressure rinsing. Find the most up-to-date version of ISO at Engineering This British Standard was published by BSI. It is the UK implementation of. ISO The UK participation in its preparation was.
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On reconstruction of a BS EN Cable Method of extraction of contaminants by pressure rinsing ICS A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract.
Users are responsible for its correct application. Compliance with a British Standard cannot 116232-3 immunity from legal obligations.
BS-ISOMethod of extraction of contaminants by pressure rinsing_百度文库
The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. The main task of technical committees is to prepare International Standards.
Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights.
ISO shall not be held responsible for identifying any or all such patent rights. ISO consists of the following parts, ios the general title Road vehicles — Cleanliness of components of fluid circuits: Method of extraction of contaminants by pressure rinsing Part 4: Method jso extraction of contaminants by ultrasonic techniques Part 5: Method of extraction of contaminants on functional test bench Part 6: Particle mass determination by 61232-3 analysis Part 7: Particle sizing and counting by microscopic analysis Part 8: Particle nature determination by microscopic analysis Part 9: 16223-3 sizing and counting by automatic light extinction particle counter Part The presence of particles residual from the manufacturing and assembly processes will cause a substantial increase in the wear rates of the system 16223-3 the initial run-up and early life, and isl even cause catastrophic failures.
In order to achieve reliable performance of components and systems, control over the amount of particles introduced during the build phase is necessary, and measurement of particulate contaminants is the basis of control. The ISO series has been drafted to fulfil the requirements of the automotive industry, since the function and performance of modern automotive fluid components and systems are sensitive to the presence of a single or a few critically sized particles.
Consequently, ISO requires the analysis isso the total volume of extraction liquid and of all contaminants collected using an approved extraction method. These International Standards have been extended, modified and new ones have been developed to produce a comprehensive suite of International Standards to measure and report the cleanliness levels of parts and is fitted to automotive fluid circuits.
This part of ISO defines procedures for the removal and collection of contaminants from components by rinsing with a jet of test liquid so that their cleanliness can be evaluated. The cleanliness level of a component, as determined according to this method, depends to a large extent on the test parameters e. All parameters should be included in the cleanliness specification and in the inspection document and should be rigorously followed by the test staff.
Method of extraction of contaminants by pressure rinsing 1 Scope This part of ISO describes the principles of extraction of contaminants 61232-3 a component by pressure rinsing. It is preferably applied to components 162323- which the surface to be examined is accessible by a ido of test liquid.
This method can be employed on its own or in association with other methods of extraction described in the ISO series. Unless otherwise specified, this part of ISO deals with particulate contamination only.
BS ISO 16232-3:2007
It does not, therefore, cover appearance defects or contamination by liquid or gaseous materials. It covers the amount and the nature of residual particles resulting from manufacturing processes and from the environment.
For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document including any amendments applies. Method of extraction of contaminants by agitation ISORoad vehicles — Cleanliness of components of fluid circuits — Part 4: Method of extraction of contaminants by ultrasonic techniques ISORoad vehicles — Cleanliness of components of fluid circuits — Part 5: Method of extraction of contaminants on functional test bench ISORoad vehicles — Cleanliness of components of fluid circuits — Part 6: Particle mass determination by gravimetric analysis ISORoad vehicles — Cleanliness of components of fluid circuits — Part 7: Particle sizing and counting by microscopic analysis ISORoad vehicles — Cleanliness of components of fluid circuits — Part 8: Particle nature determination by microscopic analysis ISORoad vehicles — Cleanliness of components of fluid circuits — Part 9: Particle sizing and counting by automatic light extinction particle counter ISO It should be filtered to attain the requirements of 6.
This container shall be appropriate to the shape of the component and made of material compatible with the test liquid. Its degree of cleanliness shall comply with the blank requirements specified in 6. The dispenser can also be used to rinse the test equipment and all other items. A conical base is preferred.
The collection equipment shall be cleaned to achieve the requirement of 6. All collection equipment shall be cleaned and covered before use in order to limit contamination from the environment. This requirement may result in the test being carried out in a laboratory or controlled workplace.
The suitability of the environment is validated when performing the blank test. Good laboratory practices shall be observed in the preparation and use of these chemicals.
Follow the precautions for safe handling and usage as described in the MSDS available from the supplier. Appropriate precautions should be taken to avoid inhalation of fumes from these solvents. Always use suitable protective equipment.
In the event of spillage it shall be cleaned-up in the manner detailed in the MSDS. In this case, the initial contamination level may be altered. The extraction conditions should be agreed upon between parties and included in the inspection document. A synopsis of the operations to perform is given in Annex A. The detailed description of operating conditions and equipment used in application of this standard to rinse and empty the component constitutes the extraction procedure.
This procedure shall be established for each component and shall be both agreed between parties and included in the inspection document. Details of the procedure shall be reported on a suitable data sheet for an example of an extraction procedure data sheet see Annex B.
This is performed after cleaning the equipment and the initial blank shall exhibit values stated in 6. NOTE Conditioning and cleaning serves the purpose of obtaining a suitable cleanliness level of the inspection set-up. It is recommended that a basic procedure 1623-3 conditioning the inspection set up be defined.
For example, by performing a cleanliness analysis of a defined volume of liquid after the cleaning procedure of the set-up, it can be determined whether the inspection environment is in suitable conditions and acceptable for carrying out a validation procedure. Iwo initial blank shall exhibit values stated in 6.
The external surface should be cleaned in a physically different place from where extraction is to be carried out. Ensure that no particles are deposited on or removed from controlled surfaces. For example, if the component is of large size like a tankclean only those external surfaces which might contribute to contamination during the extraction process. If the component contains a shipment liquid, empty it out, measure its volume and analyse its contaminants according to Clause 7.
NOTE Dismantling or removal of plugs might generate particles to contribute to the original contamination. When components are heavy or large, they should be manipulated and moved to a suitable position with appropriate supports e.
This position shall enable the extraction liquid to flow easily into a collection equipment or sampling container. For sio which are difficult to empty, such as tanks, it is possible to use a vacuum suction system isi collect the whole extraction liquid. NOTE Any operation of dismantling might generate particles which could be added to or lost from the original amount of particles. Depending on the presumed amount of particles or extraction liquid volume, collect the extraction liquid in either a single or several sampling containers or, if appropriate, by using the vacuum suction system.
Carefully rinse the collection equipment and collect all of the accumulated particles in a clean sampling container.
Identify the sampling container. NOTE 1 As a function of the level of particle observed in the extraction liquid, it may be necessary to divide the 162232-3 volume among several sampling containers to facilitate their subsequent analysis, to avoid either clogging of the membrane filter during filtration, the saturation of an APC or overlapping particles in the case of microscopic analysis. NOTE 2 Instead of collecting in a container, the liquid samples may also be directed through a membrane filter directly connected to the outlet of the collection equipment.
NOTE The extractions should be made directly the one after the other. For the particle count, this is applicable to the total number 162332-3 particles larger than the smallest particle size specified in the inspection document. This particle size shall be chosen to enable counting significant numbers of particles; divide the 61232-3 of the last sample S3 by the sum of all the values obtained in 6.
NOTE 2 This procedure enables the extraction curve to be drawn and the end-point u 0,10 to 166232-3 demonstrated see The cleanliness level of the component is the sum of the extractions.
NOTE 3 In some cases for example: If this is the case, it is ensured that all extraction parameters have been properly investigated.
Then repeat operations 6. Main sources of blank contamination are: The blank value results from the combination and interaction of the above factors being applied for a specified test task. This is validated when performing the blank test. To ensure process consistency, a blank test should be performed at regular intervals using identical test parameters. The blank value shall be determined and shall comply with the requirements for each analysis method specified in the inspection document.
Blank value General The acceptable blank value depends on the component’s presumed or specified cleanliness level and, depending on the analysis method, is as follows. NOTE Using a 4-digit balance under uncontrolled environmental conditions uncontrolled humidity and temperature the minimum measurable blank value is 0,3 mg.
NOTE The sizes specified in the inspection document for the blank should be as close as possible to the maximum particle size acceptable for the component and chosen to allow counting significant numbers of particles.