1、Designation: D 4285 83 (Reapproved 2006)Standard Test Method forIndicating Oil or Water in Compressed Air1This standard is issued under the fixed designation D 4285; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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, airb
3、last cleaning, and coating application operations.1.2 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of r
4、egulatory limitations prior to use. For specific hazardstatements, see Section 4.2. Significance and Use2.1 Clean compressed air is required to prevent contamina-tion of coating materials and surfaces being prepared forcoating. This test method is a visual examination technique fordetermining oil or
5、 water in compressed air. Other types ofcontamination may require additional analytical techniques fordetection.3. Apparatus and Materials3.1 Absorbent Collector, such as white absorbent paper orcloth and rigid backing for mounting absorbent collector, or3.2 Nonabsorbent Collector, such as rigid tra
6、nsparent plas-tic, approximately14 in. thick.4. Cautions4.1 To avoid false indications prior to testing:4.1.1 Allow compressed air system to reach operatingconditions, and4.1.2 Allow air to discharge at operating conditions toremove accumulated condensation in the system.4.2 Fasten the collector mat
7、erial to the rigid backing.Precaution: Avoid personal contact with the air stream.5. Sampling5.1 Conduct the test on discharging air as 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
8、collector within 24 in. of the air-dischargepoint, centered in the air stream.6.3 Adjust air discharge so that the collector remains intactduring 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, o
9、r both.7. Interpretation of Results7.1 Any indication of oil discoloration on the collector shallbe cause for rejection of the compressed air for use in abrasiveblast cleaning, air blast cleaning, and coating applicationoperations.7.2 Any indications of water contamination on the collectorshall be c
10、ause for rejection of the compressed air for use inthose applications where water is detrimental, such as abrasiveblast cleaning, air blast cleaning, and coating applicationoperations.8. Precision and Bias8.1 No precision or bias statement has been established forthis test method.9. Keywords9.1 comp
11、ressed air; oil and water in compressed air1This test method is under the jurisdiction of ASTM Committee D33 onProtective Coating and Lining Work for Power Generation Facilities and is the directresponsibility of Subcommittee D33.05 on Application and Surface Preparation.Current edition approved Dec
12、. 1, 2006. Published December 2006. Originallyapproved in 1983. Last previous edition approved in 1999 as D 4285 - 83 (1999).1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.ASTM International takes no position respecting the validity
13、 of any patent rights asserted in connection with any item mentionedin this standard. Users of this 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
14、to revision at any time by the responsible technical committee and must be reviewed every five years 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
15、. Your comments will receive careful consideration at a meeting of theresponsible technical committee, 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
16、 copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,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).D 4285 83 (2006)2
