ASTM E2042/E2042M-09(2016)

ASTM E2042/E2042M-09(2016) - 1.10.2016

Significance and Use

4.1 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 E2352 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 Units—The 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

E1549-06	Standard Specification for ESD Controlled Garments Required in Cleanrooms and Controlled Environments for Spacecraft for Non-Hazardous and Hazardous Operations
D1193-06(2018)	Standard Specification for Reagent Water
E1234-12(2020)	Standard Practice for Handling, Transporting, and Installing Nonvolatile Residue (NVR) Sample Plates Used in Environmentally Controlled Areas for Spacecraft
E1235-12(2020)e1	Standard Test Method for Gravimetric Determination of Nonvolatile Residue (NVR) in Environmentally Controlled Areas for Spacecraft (Includes all amendments and changes 6/9/2020).
E1560-18	Standard Test Method for Gravimetric Determination of Nonvolatile Residue From Cleanroom Wipers
E2352-19	Standard Practice for Aerospace Cleanrooms and Associated Controlled Environments´Cleanroom Operations
F24-20	Standard Test Method for Measuring and Counting Particulate Contamination on Surfaces
F25-04	Standard Test Method for Sizing and Counting Airborne Particulate Contamination in Cleanrooms and Other Dust-Controlled Areas
F50-21	Standard 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-RP-CC007	Testing ULPA Filters
IEST-RP-CC016	The Rate of Deposition of Nonvolatile Residue in Cleanrooms
IEST-RP-CC0018	Cleanroom Housekeeping and Monitoring Procedures
	Garment System Considerations for Cleanrooms and Other Controlled Environments
IEST-RP-CC026

FED-STD-209E	Airborne Particulate Cleanliness Classes in Cleanrooms and Clean Zones Cancelled Nov. 29, 2001 and replaced with ISO 14644-1 and 14644-2. FED-STD-209E may be used by mutual agreement between buyer and seller. Available from U.S. Government Printing Office, Superintendent of Documents, 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401. FS209E cleanroom classes are given for reference in parentheses after the ISO classes.
	Isopropyl Alcohol
O-A-51
MIL-D-16791	Detergents, General Purpose (Liquid, Non-Ionic)
	Cleanrooms and Associated Controlled EnvironmentsPart 1: Classification of Air Cleanliness
ISO 14644-2	Cleanrooms and Associated Controlled EnvironmentsPart 2: Specifications for Testing and Monitoring to Prove Continued Compliance with ISO 14644-1