1、Designation: D4285 83 (Reapproved 2018)Standard Test Method forIndicating Oil or Water in Compressed Air1This standard is issued under the fixed designation D4285; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last re
2、vision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method is used to determine the presence of oilor water in compressed air used for abrasive blast cleaning, airblas
3、t cleaning, and coating application operations.1.2 The values stated in inch-pound units are to be regardedas standard. No other units of measurement are included in thisstandard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is therespon
4、sibility of the user of this standard to establish appro-priate safety, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.For specific hazard statements, see Section 4.1.4 This international standard was developed in accor-dance with internat
5、ionally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Significance and Use2.1 Clean compressed air is
6、required to prevent contamina-tion of coating materials and surfaces being prepared forcoating. This test method is a visual examination technique fordetermining oil or water in compressed air. Other types ofcontamination may require additional analytical techniques fordetection.3. Apparatus and Mat
7、erials3.1 Absorbent Collector, such as white absorbent paper orcloth and rigid backing for mounting absorbent collector, or3.2 Nonabsorbent Collector, such as rigid transparentplastic, approximately14 in. thick.4. Cautions4.1 To avoid false indications prior to testing:4.1.1 Allow compressed air sys
8、tem to reach operatingconditions, and4.1.2 Allow air to discharge at operating conditions toremove accumulated condensation in the system.4.2 Fasten the collector material to the rigid backing.Precaution: Avoid personal contact with the air stream.5. Sampling5.1 Conduct the test on discharging air a
9、s close to the usepoint as possible and after the inline oil and water separators.6. Procedure6.1 Use either the absorbent or nonabsorbent collector.6.2 Position the collector within 24 in. of the air-dischargepoint, centered in the air stream.6.3 Adjust air discharge so that the collector remains i
10、ntactduring the test. Allow air to discharge onto the collector for aminimum of 1 min.6.4 Visually examine the collector for the presence orabsence of oil or water, or both.7. Interpretation of Results7.1 Any indication of oil discoloration on the collector shallbe cause for rejection of the compres
11、sed air for use in abrasiveblast cleaning, air blast cleaning, and coating applicationoperations.7.2 Any indications of water contamination on the collectorshall be cause for rejection of the compressed air for use inthose applications where water is detrimental, such as abrasiveblast cleaning, air
12、blast cleaning, and coating applicationoperations.8. Precision and Bias8.1 No precision or bias statement has been established forthis test method.9. Keywords9.1 compressed air; oil and water in compressed air1This test method is under the jurisdiction of ASTM Committee D33 onProtective Coating and
13、Lining Work for Power Generation Facilities and is the directresponsibility of Subcommittee D33.05 on Application and Surface Preparation.Current edition approved Aug. 1, 2018. Published August 2018. Originallyapproved in 1983. Last previous edition approved in 2012 as D4285 83 (2012).DOI: 10.1520/D
14、4285-83R18.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopme
15、nt of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of thi
16、s standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five yea
17、rs andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical commit
18、tee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 1942
19、8-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 83 (2018)2
