ASTM E1549

This document specifies special items of clothing (cleanroom garments) designed to protect aerospace products from electrostatic discharge and from contaminants released by personnel and garments. Special clothing includes low linting coveralls, footwear, and head covers. The function of cleanroom garments is to contain the contaminants generated by people and to minimize contaminants from the garments. Two types of fabrics can be selected for the garments. Both types are inherently static-dissipative materials to prevent electrical discharges that can damage sensitive hardware or initiate explosions in the presence of flammable vapors. The material specified for 'hazardous environments' is flame resistant and provides additional protection to the wearer. Selection of garment design and fabric should be based on the user's needs with respect to functional and environmental requirements.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

1. Scope

1.1 This document specifies special items of clothing (cleanroom garments) designed to protect aerospace products from electrostatic discharge and from contaminants released by personnel and garments. Special clothing includes low linting coveralls, footwear, and head covers.

1.2 The function of cleanroom garments is to contain the contaminants generated by people and to minimize contaminants from the garments.

1.3 Two types of fabrics can be selected for the garments. Both types are inherently static-dissipative materials to prevent electrical discharges that can damage sensitive hardware or initiate explosions in the presence of flammable vapors. The material specified for "hazardous environments" is flame resistant and provides additional protection to the wearer. Selection of garment design and fabric should be based on the user's needs with respect to functional and environmental requirements.

1.4 Additional, background information can be found in SD-TR-91-26 and IES-RP-CC003.2.

1.5 This standard is intended to be in compliance with the ASTM policy on Fire Standards Flammability tests specified in this standard should be used to measure and describe the properties of fabrics in response to heat and flame under controlled laboratory conditions and should not be used to describe or appraise the fabrics under actual fire conditions. However, results of the tests may be used as elements of a fire risk assessment which takes into account all of the factors which are pertinent to an assessment of the fire hazard of operations in controlled environment areas.

1.6 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.

1.7 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information purposes only but are hard conversions.

2. Referenced Documents

D123 Terminology Relating to Textiles
D1863 Specification for Mineral Aggregate Used on Built-Up Roofs
D1894 Test Method for Static and Kinetic Coefficients of Friction of Plastic Film and Sheeting
D204 Test Methods for Sewing Threads
E1560 Test Method for Gravimetric Determination of Nonvolatile Residue From Cleanroom Wipers
E176 Terminology of Fire Standards
E535 Practice for Preparation of Fire-Test-Response Standards
E96/E96M Test Methods for Water Vapor Transmission of Materials
F51 Test Method for Sizing and Counting Particulate Contaminant In and On Clean Room Garments
F739 Test Method for Permeation of Liquids and Gases through Protective Clothing Materials under Conditions of Continuous Contact
AGMC/MAQC-335c "Personnel Garments, Electrostatic Discharge (ESD) Requirements for the Protection of ESD Sensitive Items
FED STD A-A 50195 Thread Aramid
FED-SPEC-191 Textile Test Method
FED-STD-209E Airborne Particulate Cleanliness Classes in Cleanrooms and Clean Zones
FED-STD-751a Stitches, Seams, and Stitchings
GP-1098 STS Safety, Reliability, and Quality Assurance Ground Safety Plan, Launch Complex 39, KSC Industrial Area
IES-RP-CC-003.2 Garments Required In Cleanrooms And Controlled Environment Areas
ISO 14644-1 Cleanrooms and Associated Controlled Environments, Classification of Air Cleanliness
ISO 14644-2 Cleanrooms and Associated Controlled Environments, Cleanliness Levels
MIL-C-43122E Cloth, Sateen, Cotton, Flame Retardant Treated
MIL-C-43339D Coveralls, Industrial: Lint-Free, 7 Nov. 1988
MIL-W-43685B Webbing and Tape, Textile, Aramid Fiber, 20 Sept. 1989
MMA-1985-79, Revision 2, Standard Test Method for Evaluating Triboelectric Charge Generation and Decay
NFPA #702-1980 Standard for Classification of the Flammability of Wearing Apparel
NHB 8060.1 C, NASA Handbook, Flammability, Odor, Offgassing, and Compatibility Requirements and Test Procedures for Materials in Environments that Support Combustion, April 2, 1991, Upward Flame Propagation Test (Test 1)
SD-TR-89-63 Standard Methods for Measurement of Nonvolatile Residue on Surfaces, E. N. Borson, E. J. Watts, G. A. To; U.S. Air Force, Space Systems Division, 10 Aug. 1989
SD-TR-91-26 Garment Selection for Cleanrooms and Controlled Environments for Spacecraft, E. J. Watts, U.S. Air Force, Space Systems Division, 1 April 1991

Index Terms

cleanroom; contamination control; garments; spacecraft; ICS Number Code 61.020

Citing ASTM Standards

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