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ASTM F310-07(2012)

(Practice)

Standard Practice for Sampling Cryogenic Aerospace Fluids

Standard Practice for Sampling Cryogenic Aerospace Fluids

ABSTRACT
This practice establishes the apparatuses and materials needed, possible hazards, and two standard procedures for taking samples of cryogenic aerospace fluids for analysis. For the Dewar flask procedure, a clean Dewar flask is used to collect a sample of cryogenic aerospace fluid either from a sampling valve, or poured from a Dewar flask used for storage. Whereas, for the cryogenic sampler procedure, the sampler is used to withdraw a small amount of liquefied gas from a large supply, and is then allowed to cool until a steady stream of cryogenic liquid exists in the sampler. Once the sampling valves are closed, the trapped liquid will convert to gas and pressurize the sampling vessel.
SCOPE
1.1 This practice describes procedures for taking a sample of cryogenic aerospace fluid for analysis.  
1.2 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 requirements prior to use. For hazard statement, see Section 5.

General Information

Status
Historical
Publication Date
31-Oct-2012
ICS
49.080 - Aerospace fluid systems and components
Technical Committee
E21 - Space Simulation and Applications of Space Technology
Drafting Committee
E21.05 - Contamination
Current Stage
Ref Project

Relations

Replaces
ASTM F310-07 - Standard Practice for Sampling Cryogenic Aerospace Fluids
Effective Date
01-Nov-2012
Replaced By
ASTM F310-07(2020) - Standard Practice for Sampling Cryogenic Aerospace Fluids
Effective Date
01-Apr-2020
Referred By
ASTM F307-13(2020) - Standard Practice for Sampling Pressurized Gas for Gas Analysis
Effective Date
01-Nov-2012

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ASTM F310-07(2012) - Standard Practice for Sampling Cryogenic Aerospace FluidsASTM F310-07(2012) - Standard Practice for Sampling Cryogenic Aerospace Fluids
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ASTM F310-07(2012) - Standard Practice for Sampling Cryogenic Aerospace Fluids
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: F310 − 07 (Reapproved 2012)
Standard Practice for
Sampling Cryogenic Aerospace Fluids
ThisstandardisissuedunderthefixeddesignationF310;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 4. Apparatus and Materials
1.1 This practice describes procedures for taking a sample
4.1 Apparatus and Materials Common to Both Procedures:
of cryogenic aerospace fluid for analysis.
4.1.1 Protective Clothing, such as an apron, face-shield, and
thermal gloves. Coveralls meeting safety requirements for
1.2 This standard does not purport to address all of the
static dissipation, and flammability may be required depending
safety concerns, if any, associated with its use. It is the
on local safety regulations or operating procedures. White
responsibility of the user of this standard to establish appro-
coveralls are recommended while working with cryogenic
priate safety and health practices and determine the applica-
oxygen as they will show dirt or oil which may react violently
bility of regulatory requirements prior to use. For hazard
with cryogenic oxygen.
statement, see Section 5.
4.1.2 Wash Bottle, 1–L made of a material compatible with
2. Referenced Documents the solvent selected for the cleaning procedure, Teflon FEP is
2 generally acceptable with the solvents and fluids used.
2.1 ASTM Standards:
4.1.3 Solvents—must be selected to meet the performance,
F311 Practice for Processing Aerospace Liquid Samples for
safety, cleanliness, and environmental requirements based on
Particulate Contamination Analysis Using Membrane Fil-
standardized procedures, local and international environmental
ters
regulations, and local procedures.
G93 Practice for Cleaning Methods and Cleanliness Levels
4.1.3.1 Cleaning Solvents for Cryogenic Oxygen Sampling
for Material and Equipment Used in Oxygen-Enriched
Equipment—Solvents for use on oxygen sampling equipment
Environments
should be selected in accordance with 5.6. Examples of
G127 Guide for the Selection of Cleaning Agents for Oxy-
solvents currently used for this purpose include, but are not
gen Systems
limited to:
Hydrofluorochlorocarbons, such as Asahiklin AK 225,
3. Summary of Practice
Hydrofluorocarbons, such as DuPont Vertrel XF or Vertrel
3.1 Dewar Flask Procedure—A clean Dewar Flask is used
MCA,
to collect a sample of cryogenic aerospace fluid either from a
Hydrofluoroethers, such as 3M HFE 7100 or HFE 71DE,
sampling valve, or poured from a larger Dewar flask used for
Water-based solvents, such as non-ionic detergents.
storage.
4.1.3.2 Cleaning Solvent for Sampling Equipment Used with
3.2 Cryogenic Sampler Procedure—The sampler is used to
other Cryogenic Fluids:
withdraw a small amount of liquefied gas from a large supply.
Ethylacetateshallhavenomorethan1µg/mLresidueafter
The sampler is allowed to cool until a steady stream of
evaporation,
cryogenic liquid exists in the sampler. Once the sampling
Cyclohexaneshallhavenomorethan1µg/mLresidueafter
valves are closed the trapped liquid will convert to a gas and
evaporation,
pressurize the sampling vessel.
The cleaning solvent will be an azeotrope mixture of ethyl
acetate and cyclohexane, filtered in accordance with Practice
F311. The mole fraction axeotropic mixture is 0.5286 ethyl
This practice is under the jurisdiction of ASTM Committee E21 on Space
acetate and 0.4714 cyclohexane. This is prepared by mixing
Simulation andApplications of Space Technology and is the direct responsibility of
Subcommittee E21.05 on Contamination. 503 mL of ethyl acetate with 497 mL of cyclohexane to
Current edition approved Nov. 1, 2012. Published November 2012. Originally
produce 1 L of cleaning solvent. A fluorocarbon wash bottle
approved in 1970. Last previous edition approved in 2007 as F310 – 07. DOI:
should be used with this cleaning solvent.
10.1520/F0310-07R12.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.2 Dewar Flask Procedure:
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
4.2.1 Dewar Flask, 1-L capacity.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 4.2.2 Dewar Cover, with provisions for venting.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F310 − 07 (2012)
4.2.3 Stainless Steel Catch Bucket—(hydrocarbon clean if 6.3 Open the sampling valve and allow the chill-down to
used for liquid oxygen sampling). occur until liquid is flowing into the catch bucket.
4.2.4 Tongs, stainless steel (Type 300).
6.4 Remove the cover from the Dewar flask.
4.2.5 Carrying Case for flask.
6.5 Hold the flask in a stream of liquid and fill to approxi-
4.2.6 Polychlorotrifluoroethylene Bag.
mately one-half full. Dump the liquid in the catch bucket.
4.3 Cryogenic Sampler Procedure:
6.6 Repeat the procedure described in 6.4 until the flask has
4.3.1 Liquid Cryogenic Samplers
been sufficiently chilled down.
4.3.2 Miscellaneous Fittings, for adapting to the sample
point.
6.7 Fill the Dewar flask approximately three-fourths full.
4.3.3 Flexible Hose, pressure-rated at 3500 kPa (500 psig)
6.8 Close the sampling valve.
gage suitable for the minimum temperature to be encountered
6.9 Replace the cover on top of the Dewar flask
andmadeofmaterialscompatiblewiththefluidbeingsampled.
(Warning—The cover must be vented to avoid excessive
4.3.4 Handtools, needed to make the appropriate connec-
pressure.)
tions.
6.10 Place a poly
...

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7.1 Although a cleaning action is imparted to the test component, it is not the intent of this practice to serve as a cleaning procedure. Components are normally cleaner after each consecutive test; thus repeated tests may be used to establish process limits for a given component (Fig. 4). A specific set of test parameters must be supplied by the agency specifying cleanliness limits. Fig. 1, Fig. 2, and Fig. 3 may be used as a guide to establish the desired parameters of test fluid, vibration, extraction, and analysis.
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7.2 The curve in Fig. 4 shows the typical behavior of a component when tested for cleanliness several consecutive times. Stabilization generally occurs before the fifth successive run. The stabilized region starts where a horizontal line through the maximum stabilized value intersects the curve.  
7.3 The allowable cleanliness limit of a test component should be based on the cleanliness requirements of the system in which it will be used, and the assigned value should be greater than the maximum stabilized value. When defining the allowable cleanliness limits, an important consideration is that the accuracy of the results decreases as the allowable limit value approaches the stabilized value.
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