ASTM D4285-83(2018)

Standard Test Method for Indicating Oil or Water in Compressed Air

SIGNIFICANCE AND USE
2.1 Clean compressed air is required to prevent contamination 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.
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 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 4.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Jul-2018
• ICS: 23.140 - Compressors and pneumatic machines
• Technical Committee: D33 - Protective Coating and Lining Work for Power Generation Facilities
• Drafting Committee: D33.05 - Application and Surface Preparation

Overview

ASTM D4285-83(2018) - Standard Test Method for Indicating Oil or Water in Compressed Air provides a visual evaluation process to detect oil or water contamination in compressed air systems. Developed by ASTM International, this standard is essential in industries where clean and contaminant-free compressed air is vital, such as abrasive blast cleaning, air blast cleaning, and coating application operations. The method focuses on preventing contamination that can compromise the quality of coatings or damage prepared surfaces.

Key Topics

• Visual Examination Method: Provides a straightforward procedure for visually detecting the presence of oil or water in compressed air using absorbent or nonabsorbent collectors.
• Equipment Requirements: Utilizes basic apparatus such as white absorbent paper or cloth, rigid backing, or nonabsorbent transparent plastic as collectors.
• Testing Process:
  • Conducts the test as close as possible to the use point, after any inline oil or water separators.
  • Positions the collector in the airstream near the discharge for a set period (minimum 1 minute), then visually inspects for any oil discoloration or water presence.
• Interpretation of Results: Any visual indication of oil or water on the collector is cause for rejection of the compressed air for operations where cleanliness is critical.
• Safety and Practice Considerations: Users are responsible for implementing appropriate safety, health, and environmental protocols and considering regulatory restrictions relevant to their operations.

Applications

ASTM D4285-83(2018) is widely applied in industries where compressed air quality is crucial for the integrity of surface preparation and coatings, including:

• Abrasive Blast Cleaning: Ensures that the air used does not introduce oil or water that could affect the adhesion or curing of protective coatings.
• Air Blast Cleaning: Prevents residue deposition on surfaces, maintaining optimal conditions during cleaning.
• Coating Applications: Safeguards paint and coating systems against defects and contamination by verifying that the compressed air is free from oil and water.
• Maintenance and Quality Assurance: Supports routine monitoring and maintenance of compressed air systems to meet industry standards and quality benchmarks.

Using this method helps organizations maintain compliance with recognized best practices, minimize rework or defects in coated products, and extend the service life of coated surfaces.

Related Standards

For comprehensive compressed air quality management and surface preparation, the following related standards may be relevant:

• ISO 8573 Series: Addresses compressed air quality specifications and contamination measurement methods.
• ASTM D2013: Preparation of coal samples for analysis, often used in conjunction with clean air requirements.
• ASTM D7396: Standard Practice for Testing and Evaluation of Coating Systems on Metal Substrates.
• SSPC-SP Standards: Surface preparation standards for various substrate cleaning methods.

Compliance with ASTM D4285-83(2018) and related compressed air quality standards helps ensure reliable performance in industrial processes, supports regulatory conformity, and upholds safety and quality in surface treatment and coating operations.

Keywords: ASTM D4285, compressed air quality, oil in compressed air, water in compressed air, visual examination, abrasive blast cleaning, coating application, air contamination detection.

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D4285 − 83 (Reapproved 2018)
Standard Test Method for
Indicating Oil or Water in Compressed Air
This standard is issued under the fixed designation D4285; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Cautions
1.1 This test method is used to determine the presence of oil 4.1 To avoid false indications prior to testing:
or water in compressed air used for abrasive blast cleaning, air 4.1.1 Allow compressed air system to reach operating
blast cleaning, and coating application operations. conditions, and
4.1.2 Allow air to discharge at operating conditions to
1.2 The values stated in inch-pound units are to be regarded
remove accumulated condensation in the system.
as standard. No other units of measurement are included in this
standard. 4.2 Fasten the collector material to the rigid backing.
Precaution: Avoid personal contact with the air stream.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Sampling
responsibility of the user of this standard to establish appro-
5.1 Conduct the test on discharging air as close to the use
priate safety, health, and environmental practices and deter-
point as possible and after the inline oil and water separators.
mine the applicability of regulatory limitations prior to use.
For specific hazard statements, see Section 4.
6. Procedure
1.4 This international standard was developed in accor-
6.1 Use either the absorbent or nonabsorbent collector.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the 6.2 Position the collector within 24 in. of the air-discharge
point, centered in the air stream.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
6.3 Adjust air discharge so that the collector remains intact
Barriers to Trade (TBT) Committee.
during the test. Allow air to discharge onto the collector for a
minimum of 1 min.
2. Significance and Use
6.4 Visually examine the collector for the presence or
2.1 Clean compressed air is required to prevent contamina-
absence of oil or water, or both.
tion of coating materials and surfaces being prepared for
coating. This test method is a visual examination technique for 7. Interpretation of Results
determining oil or water in compressed air. Other types of
7.1 Any indication of oil discoloration on the collector
...