ASTM E2217-12
(Practice)Standard Practice for Design and Construction of Aerospace Cleanrooms and Contamination Controlled Areas
Standard Practice for Design and Construction of Aerospace Cleanrooms and Contamination Controlled Areas
SIGNIFICANCE AND USE
This practice describes and defines factors to be taken into consideration when designing and fabricating a cleanroom or controlled area that is used for aerospace operations and fabrication. Following the suggestions herein should provide a facility that is more capable of meeting performance requirements and that will offer protection against contamination for objects fabricated and processed in such a facility.
SCOPE
1.1 The purpose of this practice is to provide design and construction guidelines for contamination controlled facilities used in the assembly and integration of aerospace hardware. The guidelines herein are intended to ensure that the facilities, when used properly, will meet the cleanliness requirements of aerospace hardware and processes. The objective is to limit contamination due to the deposition of particulate and molecular contaminants on flight hardware surfaces.
1.2 One cleanliness classification of a facility is the airborne particle concentrations in accordance with ISO 14644-1 and 14644-2. Airborne particle concentrations in accordance with FED-STD-209E are included for reference. This simple classification is inadequate to describe a facility that will support the assembly and integration of spacecraft. The extended duration of hardware exposure during fabrication and testing, the sensitivity of the hardware to hydrocarbons and other molecular contaminants, and the changing requirements during assembly and integration must be considered in addition to the airborne particle concentrations.
1.3 The guidelines specified herein are intended to provide facilities that will effectively restrict contaminants from entering the facility, limit contamination generated by and within the facility, and continuously remove airborne contaminants generated during normal operations. Some items of support hardware, such as lifting equipment, stands, and shoe cleaners, are addressed since these items are often purchased and installed with the facility and may require accommodation in the design of the facility.
1.4 Active filtration of molecular contaminants (such as hydrocarbons, silicones, and other chemicals) is discussed. Such active filtration of molecular contaminants may be required for the processing of highly sensitive optical devices, especially infrared and cryogenic sensors. Control of microbiological contamination is not included although HEPA (High Efficiency Particulate Air) filtration will provide some control of airborne bacteria, spores, and other viable contaminants that are typically carried on particles of sizes 0.3 μm and larger. Control of radioactive contamination and accommodation of very hazardous materials such as propellants, strong acids or caustics, or carcinogens are not addressed.
1.5 No facility will compensate for excessive contamination generated inside the facility. In addition to an effective facility design, the user must also institute a routine maintenance program (see Practice E2042) for the facility, and personnel and operational disciplines that limit the transfer of contaminants through entry doors and contaminant generation inside the facility.
1.6 This practice only addresses guidelines for contamination control in facility design. It must be implemented in compliance with all mandatory government and regulatory building and safety codes. References to related cleanroom standards and U.S. building codes and standards may be found in IEST-RP-CC012.
1.7 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.7.1 The values given in parentheses are provided for information only and are not considered standard.
1.8 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 ...
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Designation: E2217 − 12
Standard Practice for
Design and Construction of Aerospace Cleanrooms and
1
Contamination Controlled Areas
This standard is issued under the fixed designation E2217; 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 Efficiency Particulate Air) filtration will provide some control
of airborne bacteria, spores, and other viable contaminants that
1.1 The purpose of this practice is to provide design and
are typically carried on particles of sizes 0.3 µm and larger.
construction guidelines for contamination controlled facilities
Control of radioactive contamination and accommodation of
used in the assembly and integration of aerospace hardware.
very hazardous materials such as propellants, strong acids or
The guidelines herein are intended to ensure that the facilities,
caustics, or carcinogens are not addressed.
when used properly, will meet the cleanliness requirements of
aerospace hardware and processes. The objective is to limit 1.5 No facility will compensate for excessive contamination
contamination due to the deposition of particulate and molecu- generated inside the facility. In addition to an effective facility
lar contaminants on flight hardware surfaces. design, the user must also institute a routine maintenance
program (see Practice E2042) for the facility, and personnel
1.2 Onecleanlinessclassificationofafacilityistheairborne
and operational disciplines that limit the transfer of contami-
particle concentrations in accordance with ISO 14644-1 and
nants through entry doors and contaminant generation inside
14644-2. Airborne particle concentrations in accordance with
the facility.
FED-STD-209E are included for reference. This simple clas-
sification is inadequate to describe a facility that will support 1.6 This practice only addresses guidelines for contamina-
the assembly and integration of spacecraft. The extended tion control in facility design. It must be implemented in
duration of hardware exposure during fabrication and testing, compliance with all mandatory government and regulatory
the sensitivity of the hardware to hydrocarbons and other building and safety codes. References to related cleanroom
molecular contaminants, and the changing requirements during standards and U.S. building codes and standards may be found
assembly and integration must be considered in addition to the in IEST-RP-CC012.
airborne particle concentrations.
1.7 The values stated in SI units are to be regarded as
1.3 The guidelines specified herein are intended to provide standard. No other units of measurement are included in this
facilities that will effectively restrict contaminants from enter- standard.
ing the facility, limit contamination generated by and within 1.7.1 The values given in parentheses are provided for
the facility, and continuously remove airborne contaminants information only and are not considered standard.
generated during normal operations. Some items of support
1.8 This standard does not purport to address all of the
hardware, such as lifting equipment, stands, and shoe cleaners,
safety concerns, if any, associated with its use. It is the
are addressed since these items are often purchased and
responsibility of the user of this standard to establish appro-
installed with the facility and may require accommodation in
priate safety and health practices and determine the applica-
the design of the facility.
bility of regulatory limitations prior to use.
1.4 Active filtration of molecular contaminants (such as
2. Referenced Documents
hydrocarbons, silicones, and other chemicals) is discussed.
2
2.1 ASTM Standards:
Such active filtration of molecular contaminants may be
E595 Test Method for Total Mass Loss and Collected Vola-
required for the processing of highly sensitive optical devices,
tile Condensable Materials from Outgassing in a Vacuum
especially infrared and cryogenic sensors. Control of micro-
Environment
biological contamination is not included although HEPA(High
E1216 Practice for Sampling for Particulate Contamination
by Tape Lift
1
This practice is under the jurisdiction of ASTM Committee E21 on Space
Simulation andApplications of Space Technology and is the direct responsibility of
2
Subcommittee E21.05 on Contamination. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved April 1, 2012. Published May 2012. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2002. Last previous edition approved in 2007 as E2217 - 02 (2007). Standards volume information, refer to th
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:E2217–02(Reapproved2007) Designation: E2217 – 12
Standard Practice for
Design and Construction of Aerospace Cleanrooms and
1
Contamination Controlled Areas
This standard is issued under the fixed designation E2217; 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
1.1 The purpose of this practice is to provide design and construction guidelines for contamination controlled facilities used in
the assembly and integration of aerospace hardware. The guidelines herein are intended to ensure that the facilities, when used
properly, will meet the cleanliness requirements of aerospace hardware and processes. The objective is to limit contamination due
to the deposition of particulate and molecular contaminants on flight hardware surfaces.
1.2 One cleanliness classification of a facility is the airborne particle concentrations in accordance with ISO 14644-1 and
14644-2.AirborneparticleconcentrationsinaccordancewithFED-STD-209Eareincludedforreference.Thissimpleclassification
is inadequate to describe a facility that will support the assembly and integration of spacecraft. The extended duration of hardware
exposure during fabrication and testing, the sensitivity of the hardware to hydrocarbons and other molecular contaminants, and the
changing requirements during assembly and integration must be considered in addition to the airborne particle concentrations.
1.3 The guidelines specified herein are intended to provide facilities that will effectively restrict contaminants from entering the
facility, limit contamination generated by and within the facility, and continuously remove airborne contaminants generated during
normal operations. Some items of support hardware, such as lifting equipment, stands, and shoe cleaners, are addressed since these
items are often purchased and installed with the facility and may require accommodation in the design of the facility.
1.4 Active filtration of molecular contaminants (such as hydrocarbons, silicones, and other chemicals) is discussed. Such active
filtration of molecular contaminants may be required for the processing of highly sensitive optical devices, especially infrared and
cryogenic sensors. Control of microbiological contamination is not included although HEPA (High Efficiency Particulate Air)
filtrationwillprovidesomecontrolofairbornebacteria,spores,andotherviablecontaminantsthataretypicallycarriedonparticles
of sizes 0.3 µm and larger. Control of radioactive contamination and accommodation of very hazardous materials such as
propellants, strong acids or caustics, or carcinogens are not addressed.
1.5 No facility will compensate for excessive contamination generated inside the facility. In addition to an effective facility
design, the user must also institute a routine maintenance program (see Practice E2042) for the facility, and personnel and
operational disciplines that limit the transfer of contaminants through entry doors and contaminant generation inside the facility.
1.6 This practice only addresses guidelines for contamination control in facility design. It must be implemented in compliance
with all mandatory government and regulatory building and safety codes. References to related cleanroom standards and U.S.
building codes and standards may be found in IEST-RP-CC012.
1.7 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.7.1 The values given in parentheses are provided for information only and are not considered standard.
1.8 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
2
2.1 ASTM Standards:
E595 Test Method for Total Mass Loss and Collected Volatile Condensable Materials from Outgassing in a Vacuum
Environment
E1216 Practice for Sampling for Particulate Contamination by Tape Lift
1
This practice is under the jurisdiction of ASTM Committee E21 on Space Simulation and Applications of Space Technology and is the direct responsibility of
Subcommittee E21.05 on Contamination.
Current edition approved April 1, 2007.2012. Published April 200
...
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