AMERICAN SOCIETY FOR TESTING AND …

1 Designation: D 4285 83 (Reapproved 1999)Standard Test Method forIndicating Oil or Water in Compressed Air1 This 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 revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or This test method is used to determine the presence of oilor water in compressed air used for abrasive blast cleaning, airblast cleaning, and coating application 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 regulatory limitations prior to specific hazardstatements, see Section Significance and Clean compressed air is required to prevent contamina-tion of coating materials and surfaces being prepared forcoating.

2 This test method is a visual examination technique fordetermining oil or water in compressed air. Other types ofcontamination may require additional analytical techniques Apparatus and Collector, such as white absorbent paper orcloth and rigid backing for mounting absorbent collector, Collector, such as rigid transparent plas-tic, approximately1 4in. To avoid false indications prior to Allow compressed air system to reach operatingconditions, Allow air to discharge at operating conditions toremove accumulated condensation in the Fasten the collector material to the rigid :Avoid personal contact with the air Conduct the test on discharging air as close to the usepoint as possible and after the inline oil and water Use either the absorbent or nonabsorbent Position the collector within 24 in. of the air-dischargepoint, centered in the air Adjust air discharge so that the collector remains intactduring the test.

3 Allow air to discharge onto the collector for aminimum of 1 Visually examine the collector for the presence orabsence of oil or water, or Interpretation of 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 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 blast cleaning, and coating Precision and No precision or bias statement has been established forthis test compressed air; oil and water in compressed airThe AMERICAN SOCIETY for TESTING and Materials takes no position respecting the validity of any patent rights asserted in connectionwith any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any suchpatent rights, and the risk of infringement of such rights, are entirely their own standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn.

4 Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM Headquarters. Your comments will receive careful consideration at a meeting of the responsibletechnical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make yourviews known to the ASTM Committee on Standards, 100 Barr Harbor Drive, West Conshohocken, PA test method is under the jurisdiction of ASTM Committee D-33 onProtective Coating and Lining Work for Power Generating Facilities and is the directresponsibility of Subcommittee on Surface edition approved Sept. 30, 1983. Published December SOCIETY FOR TESTING AND MATERIALS100 Barr Harbor Dr., West Conshohocken, PA 19428 Reprinted from the Annual Book of ASTM Standards. Copyright ASTM