ASTM G93/G93M-19
Standard Guide for Cleanliness Levels and Cleaning Methods for Materials and Equipment Used in Oxygen-Enriched Environments

Standard No.

ASTM G93/G93M-19

Release Date

2019

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM G93/G93M-19

Scope

1.1 This guide covers the selection of methods and apparatus for cleaning materials and equipment intended for service in oxygen-enriched environments. Contamination problems encountered in the use of enriched air, mixtures of oxygen with other gases, or any other oxidizing gas may be solved by the same cleaning procedures applicable to most metallic and nonmetallic materials and equipment. Cleaning examples for some specific materials, components, and equipment, and the cleaning methods for particular applications, are given in the appendixes. 1.2 This guide includes levels of cleanliness used for various applications and the methods used to obtain and verify these levels. 1.3 This guide applies to chemical-, solvent-, and aqueousbased processes. 1.4 This guide describes nonmandatory material for choosing the required levels of cleanliness for systems exposed to oxygen or oxygen-enriched atmospheres. 1.5 This guide proposes a practical range of cleanliness levels that will satisfy most system needs, but it does not deal in quantitative detail with the many conditions that might demand greater cleanliness or that might allow greater contamination levels to exist. Furthermore, it does not propose specific ways to measure or monitor these levels from among the available methods. 1.6 Units—The values stated in either SI units or inchpound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.7 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. Federal, state, and local safety and disposal regulations concerning the particular hazardous materials, reagents, operations, and equipment being used should be reviewed by the user. The user is encouraged to obtain the Material Safety Data Sheet (MSDS) from the manufacturer for any material incorporated into a cleaning process. Specific cautions are given in Section 8. 1.8 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.

ASTM G93/G93M-19 Referenced Document

• ASTM D1193 Standard Specification for Reagent Water
• ASTM D2200 Standard Pictorial Surface Preparation Standards for Painting Steel Surfaces
• ASTM E312 Standard Practice for Description and Selection of Conditions for Photographing Specimens
• ASTM F312 Standard Test Methods for Microscopical Sizing and Counting Particles from Aerospace Fluids on Membrane Filters
• ASTM F331 Standard Test Method for Nonvolatile Residue of Solvent Extract from Aerospace Components (Using Flash Evaporator)*， 2020-04-01 Update
• ASTM G122 Standard Test Method for Evaluating the Effectiveness of Cleaning Agents
• ASTM G127 Standard Guide for the Selection of Cleaning Agents for Oxygen Systems
• ASTM G131 Standard Practice for Cleaning of Materials and Components by Ultrasonic Techniques*， 2023-07-13 Update
• ASTM G136 Standard Practice for Determination of Soluble Residual Contaminants in Materials by Ultrasonic Extraction
• ASTM G144 Standard Test Method for Determination of Residual Contamination of Materials and Components by Total Carbon Analysis Using a High-Temperature Combustion Analyzer
• ASTM G63 Standard Guide for Evaluating Nonmetallic Materials for Oxygen Service
• ASTM G88 Standard Guide for Designing Systems for Oxygen Service
• ISO 14644-1 Cleanrooms and associated controlled environments - Part 1: Classification of air cleanliness by particle concentration (includes Redline Version)

ASTM G93/G93M-19 history

• 2019 ASTM G93/G93M-19 Standard Guide for Cleanliness Levels and Cleaning Methods for Materials and Equipment Used in Oxygen-Enriched Environments
• 2003 ASTM G93-03(2011) Standard Practice for Cleaning Methods and Cleanliness Levels for Material and Equipment Used in Oxygen-Enriched Environments
• 2003 ASTM G93-03e1 Standard Practice for Cleaning Methods and Cleanliness Levels for Material and Equipment Used in Oxygen-Enriched Environments
• 2003 ASTM G93-03 Standard Practice for Cleaning Methods and Cleanliness Levels for Material and Equipment Used in Oxygen-Enriched Environments
• 1996 ASTM G93-96 Standard Practice for Cleaning Methods and Cleanliness Levels for Material and Equipment Used in Oxygen-Enriched Environments