ASTM D4285 – 83 R99

Designation: D 4285 – 83 (Reapproved 1999) Standard Test Method for Indicating 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 of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. 1. Scope 1.1 This test method is used to determine the presence of oil or water in compressed air used for abrasive blast cleaning, air blast cleaning, and coating application operations. 1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety and health practices and determine the applica- bility of regulatory limitations prior to use. For specific hazard statements, see Section 4. 2. Significance and Use 2.1 Clean compressed air is required to prevent contamina- tion of coating materials and surfaces being prepared for coating. This test method is a visual examination technique for determining oil or water in compressed air. Other types of contamination may require additional analytical techniques for detection. 3. Apparatus and Materials 3.1 Absorbent Collector, such as white absorbent paper or cloth and rigid backing for mounting absorbent collector, or 3.2 Nonabsorbent Collector, such as rigid transparent plas- tic, approximately 1⁄4 in. thick. 4. Cautions 4.1 To avoid false indications prior to testing: 4.1.1 Allow compressed air system to reach operating conditions, and 4.1.2 Allow air to discharge at operating conditions to remove accumulated condensation in the system. 4.2 Fasten the collector material to the rigid backing. Precaution: Avoid personal contact with the air stream. 5. Sampling 5.1 Conduct the test on discharging air as close to the use point as possible and after the inline oil and water separators. 6. Procedure 6.1 Use either the absorbent or nonabsorbent collector. 6.2 Position the collector within 24 in. of the air-discharge point, centered in the air stream. 6.3 Adjust air discharge so that the collector remains intact during the test. Allow air to discharge onto the collector for a minimum of 1 min. 6.4 Visually examine the collector for the presence or absence of oil or water, or both. 7. Interpretation of Results 7.1 Any indication of oil discoloration on the collector shall be cause for rejection of the compressed air for use in abrasive blast cleaning, air blast cleaning, and coating application operations. 7.2 Any indications of water contamination on the collector shall be cause for rejection of the compressed air for use in those applications where water is detrimental, such as abrasive blast cleaning, air blast cleaning, and coating application operations. 8. Precision and Bias 8.1 No precision or bias statement has been established for this test method. 9. Keywords 9.1 compressed air; oil and water in compressed air The American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of 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 years and if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, 100 Barr Harbor Drive, West Conshohocken, PA 19428. 1 This test method is under the jurisdiction of ASTM Committee D-33 on Protective Coating and LiningWork for Power Generating Facilities and is the direct responsibility of Subcommittee D33.05 on Surface Preparation. Current edition approved Sept. 30, 1983. Published December 1983. 1 AMERICAN SOCIETY FOR TESTING AND MATERIALS 100 Barr Harbor Dr., West Conshohocken, PA 19428 Reprinted from the Annual Book of ASTM Standards. Copyright ASTM 主营业务范围：ASTMASTMASTMASTM、NASNASNASNAS、NASMNASMNASMNASM、MILMILMILMIL、ISOISOISOISO、ENENENEN、 DINDINDINDIN、JISJISJISJIS等技术翻译；技术资料翻译；NADCAPNADCAPNADCAPNADCAP认证 标准资料翻译；国外技术标准中文版优惠低价代购等。 业务 QQQQQQQQ：2298175560229817556022981755602298175560 专业 专注于技术翻译 诚信 实惠 物超所值的服务可靠的质量保证