ASTM E1235-01

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

SIGNIFICANCE AND USE
The NVR determined by this test method is that amount that can reasonably be expected to exist on hardware exposed in environmentally controlled areas.
The evaporation of the solvent at or near room temperature is to quantify the NVR that exists at room temperature.
Numerous other methods are being used to determine NVR. This test method is not intended to replace methods used for other applications.
SCOPE
1.1 This test method covers the determination of nonvolatile residue (NVR) fallout in environmentally controlled areas used for the assembly, testing, and processing of spacecraft.
1.2 The NVR of interest is that which is deposited on sampling plate surfaces at room temperature: it is left to the user to infer the relationship between the NVR found on the sampling plate surface and that found on any other surfaces.
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.
1.4 The values stated in SI units are to be regarded as the standard.

General Information

• Status: Historical
• Publication Date: 09-Oct-2001
• ICS: 49.025.01 - Materials for aerospace construction in general
• ICS: 49.140 - Space systems and operations
• Technical Committee: E21 - Space Simulation and Applications of Space Technology
• Drafting Committee: E21.05 - Contamination

Relations

• Replaces: ASTM E1235-95e1 - Standard Test Method for Gravimetric Determination of Nonvolatile Residue (NVR) in Environmentally Controlled Areas for Spacecraft
• Effective Date: 10-Oct-2001
• Replaced By: ASTM E1235-08 - Standard Test Method for Gravimetric Determination of Nonvolatile Residue (NVR) in Environmentally Controlled Areas for Spacecraft
• Effective Date: 01-May-2008
• Referred By: ASTM E2900-19 - Standard Practice for Spacecraft Hardware Thermal Vacuum Bakeout
• Effective Date: 10-Oct-2001
• Referred By: ASTM E2352-19 - Standard Practice for Aerospace Cleanrooms and Associated Controlled Environments—Cleanroom Operations
• Effective Date: 10-Oct-2001
• Referred By: ASTM G120-15(2023) - Standard Practice for Determination of Soluble Residual Contamination by Soxhlet Extraction
• Effective Date: 10-Oct-2001
• Referred By: ASTM E2042/E2042M-09(2021) - Standard Practice for Cleaning and Maintaining Controlled Areas and Clean Rooms
• Effective Date: 10-Oct-2001
• Referred By: ASTM E2312-11(2019) - Standard Practice for Tests of Cleanroom Materials
• Effective Date: 10-Oct-2001
• Referred By: ASTM G121-18 - Standard Practice for Preparation of Contaminated Test Coupons for the Evaluation of Cleaning Agents
• Effective Date: 10-Oct-2001
• Referred By: ASTM G136-03(2023)e1 - Standard Practice for Determination of Soluble Residual Contaminants in Materials by Ultrasonic Extraction
• Effective Date: 10-Oct-2001
• Referred By: ASTM E2217-12(2019) - Standard Practice for Design and Construction of Aerospace Cleanrooms and Contamination Controlled Areas
• Effective Date: 10-Oct-2001
• Referred By: ASTM E1548-09(2022) - Standard Practice for Preparation of Aerospace Contamination Control Plans
• Effective Date: 10-Oct-2001
• Referred By: ASTM E1234-12(2020) - Standard Practice for Handling, Transporting, and Installing Nonvolatile Residue (NVR) Sample Plates Used in Environmentally Controlled Areas for Spacecraft
• Effective Date: 10-Oct-2001
• Referred By: ASTM G131-96(2023)e1 - Standard Practice for Cleaning of Materials and Components by Ultrasonic Techniques
• Effective Date: 10-Oct-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E 1235 – 01
Standard Test Method for
Gravimetric Determination of Nonvolatile Residue (NVR) in
1
Environmentally Controlled Areas for Spacecraft
This standard is issued under the fixed designation E 1235; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 14951-3 SpaceSystems—FluidCharacteristics—Part3:Ni-
4
trogen
1.1 Thistestmethodcoversthedeterminationofnonvolatile
2.3 U.S. Federal Standard:
residue(NVR)falloutinenvironmentallycontrolledareasused
FED-STD-209E AirborneParticulateCleanlinessClassesin
for the assembly, testing, and processing of spacecraft.
5
Cleanrooms and Clean Zones
1.2 The NVR of interest is that which is deposited on
2.4 Institute of Environmental Sciences and Technology:
sampling plate surfaces at room temperature: it is left to the
6
IEST-RP-CC001.3 HEPA and ULPA Filters
user to infer the relationship between the NVR found on the
6
IEST-RP-CC007.1 Testing ULPA Filters
sampling plate surface and that found on any other surfaces.
6
IEST-RP-CC034.1 HEPA and ULPA Filter Leak Tests
1.3 This standard does not purport to address all of the
IEST-STD-CC1246 Product Cleanliness Levels and Con-
safety concerns, if any, associated with its use. It is the
6
tamination Control Program
responsibility of the user of this standard to establish appro-
2.5 American National Standards Institute:
priate safety and health practices and determine the applica-
ANSI/ASME B46.1-1985 Surface Texture (Surface Rough-
bility of regulatory limitations prior to use.
4
ness, Waviness, and Lay)
1.4 The values stated in SI units are to be regarded as the
2.6 Other:
standard.
Industrial Ventilation, A Manual of Recommended Practice,
7
2. Referenced Documents
Latest Edition
SMC-TR-95-28, Nonvolatile Residue Solvent Replacement,
2.1 ASTM Standards:
2
U.S. Air Force Space and Missile Systems Center, 1
D 1193 Specification for Reagent Water
5
March 1995
E 1234 Practice for Handling, Transporting, and Installing
Nonvolatile Residue (NVR) Sample Plates Used in Envi-
3. Terminology
3
ronmentally Controlled Areas for Spacecraft
3.1 Definitions:
F 50 Practice for Continuous Sizing and Counting of Air-
3.1.1 ISO Class N (airborne particulate cleanliness class),
borne Particles in Dust-ControlledAreas and Clean Rooms
n—level of airborne particulate concentrations as defined in
Using Instruments Capable of Detecting Single Sub-
N
3 ISO 14644-1 and 14644-2, where 10 is the maximum
Micrometre and Larger Particles
3
allowable concentration (particles/m ).
2.2 ISO Standards:
3.1.1.1 Discussion—The considered particle sizes (lower
14644-1 Cleanrooms and Associated Controlled
4
threshold values) applicable for classification with ISO
Environments—Part 1: Classification of Air Cleanliness
14644-1 are limited to the range from 0.1 through 5 µm.
14644-2 Cleanrooms and Associated Controlled
Particleslargerthan5µm(macroparticles)maybeexpressedin
Environments—Part 2: Specifications for Testing and
accordance with Annex E of ISO 14644-1.
Monitoring to Prove Continued Compliance with ISO
4
3.1.2 FS209 class, n—the level of cleanliness specified by
14644-1
3
the maximum allowable number of particles/ft of air as
defined in FED-STD-209E.
1
This test method is under the jurisdiction of ASTM Committee E21 on Space
Simulation and Applications of Space Technology and is the responsibility of
Subcommittee E21.05 on Contamination.
5
Current edition approved Oct. 10, 2001. Published January 2002. Originally Available from Standardization Documents Order Desk, Bldg. 4, Section D,
e1
published as E 1235 – 88. Last previous edition E 1235 – 95 . 700 Robbins Ave., Philadelphia, PA, 19111-5094, Attn.: NPODS.
2 6
Annual Book of ASTM Standards, Vol 11.01. Available from Institute of Environmental Sciences, 940 E. Northwest High-
3
Annual Book of ASTM Standards, Vol 15.03. way, Mount Prospect, IL 60056.
4 7
Available from the American National Standards Institute, 25 W. 43rd St., 4th Available from Committee on Industrial Ventilation, PO Box 16153, Lansing,
Floor, New York NY 10036. MI 48901.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E1235–01
3.1.2.1 Discussion—This is provided for information and to 3.1.13.1 Discussion—Themolecularcontaminantmaybein
facilitate the transition to the use of the ISO classification a gaseous, liquid, or solid state. It may be uniformly or
standard (ISO 14644-1). nonuniformly distributed or be in the form of droplets. Mo-
lecular contaminants account for most of the NVR.
3.1.3 bum
...