ASTM E2042 / E2042M - 09

    Standard Practice for Cleaning and Maintaining Controlled Areas and Clean Rooms

    Active Standard ASTM E2042 / E2042M | Developed by Subcommittee: E21.05

    Book of Standards Volume: 15.03


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    Significance and Use

    This practice identifies methods for cleaning and maintaining controlled areas and clean rooms as defined by ISO 14644-1 and ISO 14644-2. Cleaning procedures are described, and cleaning frequency for different classes of facility are given. Compliance with this practice will make it easier and more likely that the required level of facility cleanliness will be maintained. A cleaner facility also will help to protect flight hardware from contamination and should reduce the frequency for cleaning flight hardware. This practice does not discuss operation and operational procedures for cleanrooms and controlled areas. Other documents such as IEST-RP-CC026 and Practice E 2352 provide recommended practices for operating cleanrooms and controlled areas.

    1. Scope

    1.1 This practice covers the procedures to be followed for the initial cleaning and normal maintenance of cleanrooms and controlled areas. This practice is applicable to aerospace clean areas where both particles and molecular films (NVR) must be controlled.

    1.2 UnitsThe values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the 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 and health practices and determine the applicability of regulatory limitations prior to use.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D1193 Specification for Reagent Water

    E1234 Practice for Handling, Transporting, and Installing Nonvolatile Residue (NVR) Sample Plates Used in Environmentally Controlled Areas for Spacecraft

    E1235 Test Method for Gravimetric Determination of Nonvolatile Residue (NVR) in Environmentally Controlled Areas for Spacecraft

    E1549 Specification for ESD Controlled Garments Required in Cleanrooms and Controlled Environments for Spacecraft for Non-Hazardous and Hazardous Operations

    E1560 Test Method for Gravimetric Determination of Nonvolatile Residue From Cleanroom Wipers

    E2352 Practice for Aerospace Cleanrooms and Associated Controlled Environments--Cleanroom Operations

    F24 Test Method for Measuring and Counting Particulate Contamination on Surfaces

    F25 Test Method for Sizing and Counting Airborne Particulate Contamination in Cleanrooms and Other Dust-Controlled Areas

    F50 Practice for Continuous Sizing and Counting of Airborne Particles in Dust-Controlled Areas and Clean Rooms Using Instruments Capable of Detecting Single Sub-Micrometre and Larger Particles

    IEST Standards

    IEST-STD-CC1246D Product Cleanliness Levels and Contamination Control Program IEST-STD-CC1246D replaced MIL-STD-1246.

    US Federal Standards

    O-A-51 Acetone

    US Department of Defense Standards

    MIL-D-16791 Detergents, General Purpose (Liquid, Non-Ionic)

    International Standards

    ISO14644-2 Cleanrooms and Associated Controlled EnvironmentsPart 2: Specifications for Testing and Monitoring to Prove Continued Compliance with ISO 14644-1


    ICS Code

    ICS Number Code 13.040.35 (Cleanrooms and associated controlled environments)

    UNSPSC Code

    UNSPSC Code


    Referencing This Standard

    DOI: 10.1520/E2042_E2042M-09

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM E2042 / E2042M-09, Standard Practice for Cleaning and Maintaining Controlled Areas and Clean Rooms, ASTM International, West Conshohocken, PA, 2009, www.astm.org

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