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ASTM F310-04

(Practice)

Standard Practice for Sampling Cryogenic Aerospace Fluids

Standard Practice for Sampling Cryogenic Aerospace Fluids

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 limitations prior to use. For hazard statement, see Section 5.

General Information

Status
Historical
Publication Date
31-Aug-2004
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 F310-70(2000) - Standard Practice for Sampling Cryogenic Aerospace Fluids
Effective Date
01-Sep-2004
Replaced By
ASTM F310-07 - Standard Practice for Sampling Cryogenic Aerospace Fluids
Effective Date
01-Apr-2007
Referred By
ASTM F307-13(2020) - Standard Practice for Sampling Pressurized Gas for Gas Analysis
Effective Date
01-Sep-2004

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ASTM F310-04 - Standard Practice for Sampling Cryogenic Aerospace FluidsASTM F310-04 - Standard Practice for Sampling Cryogenic Aerospace Fluids
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ASTM F310-04 - 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:F310–04
Standard Practice for
1
Sampling Cryogenic Aerospace Fluids
This standard is issued under the fixed designation F 310; 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.
This standard has been approved for use by agencies of the Department of Defense.
3
1. Scope 4.5 Liquid Cryogenic Sampler , as described in MIL-S-
27626 and MIL-PRF-25508.
1.1 This practice describes procedures for taking a sample
4.6 Miscellaneous Fittings,foradaptingtothesamplepoint.
of cryogenic aerospace fluid for analysis.
4.7 Fluorocarbon Wash Bottle, 1-L capacity, filled with an
1.2 This standard does not purport to address all of the
azeotropic mixture of ethyl acetate and cyclohexane, filtered in
safety concerns, if any, associated with its use. It is the
the manner described in Practice F 311.
responsibility of the user of this standard to establish appro-
4.8 Solvents:
priate safety and health practices and determine the applica-
4.8.1 Ethyl acetate shall have no more than 1 µg/mLresidue
bility of regulatory requirements prior to use. For hazard
after evaporation.
statement, see Section 5.
4.8.2 Cyclohexane shall have no more than 1 µg/mLresidue
2. Referenced Documents
after evaporation.
2
4.8.3 The mole fraction azeotropic mixture is 0.5286 ethyl
2.1 ASTM Standards:
acetate and 0.4714 cyclohexane.
F 311 PracticeforProcessingAerospaceLiquidSamplesfor
4.9 Flexible Hose, pressure-rated at 3500 kPa (500 psig)
Particulate Contamination Analysis Using Membrane Fil-
gage suitable for the minimum temperature to be encountered
ters
andmadeofmaterialscompatiblewiththefluidbeingsampled.
2.2 Military Standards:
4.10 Polychlorotrifluoroethylene Bag.
MIL-PRF-25508 Performance Specification, Oxygen
MIL-S-27626 Sampler, Cryogenic Liquid
5. Hazards
3. Summary of Practice
5.1 When sampling cryogenic fluids, care should always be
exercised to avoid contact with fluid or cold gas to prevent
3.1 A clean container is used to collect a sample of
painfulfrostbite.Duringthechill-downprocess,cautionshould
cryogenic aerospace fluid either from a sampling valve, or
also be exercised as gas exiting from the sampling point is
poured from a larger Dewar flask used for storage. The
under high pressure.
sampling container is chilled down by the exiting cold gas and
liquid until it will contain only liquid to be used for analysis.
6. Dewar Flask Procedure
4. Apparatus and Materials 6.1 Clean all equipment to meet oxygen system cleanliness
standards.
4.1 Dewar Flask, 1-L capacity.
6.2 Clean the outlet of the sampling port with fluid from the
4.2 Dewar Cover, with provisions for venting.
wash bottle in 4.7.
4.3 Protective Clothing, such as an apron, face shield, and
6.3 Open the sampling valve and allow the chill-down to
gloves.
occur until liquid is flowing into the catch bucket.
4.4 Stainless Steel Catch Bucket (hydrocarbon clean if used
6.4 Remove the cover from the Dewar flask.
for liquid oxygen sampling).
6.5 Hold the flask in a stream of liquid and fill to approxi-
mately one-half full. Dump the liquid in the catch bucket.
1
This practice is under the jurisdiction of ASTM Committee E21 on Space
Simulation andApplications of Space Technology and is the direct responsibility of
3
Subcommittee E21.05 on Contamination.
The sole sources of supply of the cryogenic samplers known to the committee
Current edition approved Sept. 1, 2004. Published September 2004. Originally
at this time areTypeTTU-131/E from Cosmodyne, LLC, 3010 Old Ranch Parkway,
approved in 1970. Last previous edition approved in 2000 as F 310 – 70 (2000).
Ste. 300, Seal Beach, CA 90740 and Model FCS 2001 from Cv International, Inc.,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
2730 Monterey St., #108, Torrance, CA 90503. If you are aware of alternative
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
suppliers, please provide this information to ASTM International Headquarters.
Standards volume information, refer to the standard’s Document Summary page on
Your comments will receive careful consideration at a meeting of the responsible
3
the ASTM website.
technical committee, which you may attend.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
F310–04
6.6 Repeat the procedure described in 6.4 until the flask has 7.5 Allowchill-downtooccuruntilasteadystreamofliquid
been sufficiently chilled down. is exiting from the outlet of the samples.
6.7 FilltheDewarflaskapproximatelythree-fourthsfulland 7.6 Open the cha
...

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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.
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SIGNIFICANCE AND USE
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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1.1 These practices cover sampling procedures for use in determining the particle cleanliness of liquids and liquid samples from components. Three practices, A, B, and C, have been developed on the basis of component geometry in order to encompass the wide variety of configurations. These practices establish guidelines to be used in preparing detailed procedures for sampling specific components.  
Note 1: The term cleanliness used in these practices refers to solid particles in the liquid. It does not generally cover other foreign matter such as gases, liquids, and products of chemical degradation. Cleanliness with respect to particulate contamination does not necessarily give any indication of the other types of contamination.  
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