ASTM G86-98a(2011)
(Test Method)Standard Test Method for Determining Ignition Sensitivity of Materials to Mechanical Impact in Ambient Liquid Oxygen and Pressurized Liquid and Gaseous Oxygen Environments
Standard Test Method for Determining Ignition Sensitivity of Materials to Mechanical Impact in Ambient Liquid Oxygen and Pressurized Liquid and Gaseous Oxygen Environments
SIGNIFICANCE AND USE
This test method evaluates the relative sensitivity of materials to mechanical impact in ambient pressure liquid oxygen, pressurized liquid oxygen, and pressurized gaseous oxygen.
Any change or variation in test sample configuration, thickness, preparation, or cleanliness may cause a significant change in impact sensitivity/reaction threshold.
Suggested criteria for discontinuing the tests are: (1) occurrence of two reactions in a maximum of 60 samples or less tested at the maximum energy level of 98 J (72 ft•lbf) or one reaction in a maximum of 20 samples tested at any other energy level for a material that fails; (2) no reactions for 20 samples tested at the 98-J (72-ft•lbf) energy level; or (3) a maximum of one reaction in 60 samples tested at the maximum energy level.
SCOPE
1.1 This test method describes test equipment and techniques to determine the impact sensitivity of materials in oxygen under two different conditions: (1) in ambient pressure liquid oxygen (LOX) or (2) under pressure-controlled conditions in LOX or gaseous oxygen (GOX). It is applicable to materials for use in LOX or GOX systems at pressures from ambient to 68.9 MPa (0 to 10 000 psig). The test method described herein addresses testing with pure oxygen environments; however, other oxygen-enriched fluids may be substituted throughout this document.
1.2 This test method provides a means for ranking nonmetallic materials as defined in Guide G63 for use in liquid and gaseous oxygen systems and may not be directly applicable to the determination of the sensitivity of the materials in an end-use configuration. This test method may be used to provide batch-to batch acceptance data. This test method may provide a means for evaluating metallic materials in oxygen-enriched atmospheres also; however, Guide G94 should be consulted for preferred testing methods.
1.3 Values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 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. See also Section 9.
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Standards Content (Sample)
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Designation: G86 − 98a (Reapproved 2011)
Standard Test Method for
Determining Ignition Sensitivity of Materials to Mechanical
Impact in Ambient Liquid Oxygen and Pressurized Liquid
1
and Gaseous Oxygen Environments
ThisstandardisissuedunderthefixeddesignationG86;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.
1. Scope 2. Referenced Documents
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2
2.1 ASTM Standards:
1.1 This test method describes test equipment and tech-
D1193 Specification for Reagent Water
niques to determine the impact sensitivity of materials in
D4080 Specification for Trichloroethylene, Technical and
oxygen under two different conditions: (1) in ambient pressure
Vapor-Degreasing Grade
liquid oxygen (LOX) or (2) under pressure-controlled condi-
G63 Guide for Evaluating Nonmetallic Materials for Oxy-
tions in LOX or gaseous oxygen (GOX). It is applicable to
gen Service
materials for use in LOX or GOX systems at pressures from
G88 Guide for Designing Systems for Oxygen Service
ambient to 68.9 MPa (0 to 10 000 psig). The test method
G93 Practice for Cleaning Methods and Cleanliness Levels
described herein addresses testing with pure oxygen environ-
for Material and Equipment Used in Oxygen-Enriched
ments; however, other oxygen-enriched fluids may be substi-
Environments
tuted throughout this document.
G94 Guide for Evaluating Metals for Oxygen Service
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1.2 This test method provides a means for ranking nonme-
2.2 Military Document:
tallic materials as defined in Guide G63 for use in liquid and
MIL-D-16791 Detergent, General Purpose (Liquid, Non-
gaseous oxygen systems and may not be directly applicable to
ionic), Type One
the determination of the sensitivity of the materials in an 5
2.3 American Chemical Society:
end-useconfiguration.Thistestmethodmaybeusedtoprovide
Trichloroethylene, Reagent Grade
batch-to batch acceptance data. This test method may provide 6
2.4 Compressed Gas Association:
a means for evaluating metallic materials in oxygen-enriched
G-4 Oxygen
atmospheresalso;however,GuideG94shouldbeconsultedfor
G-4.1 Cleaning Equipment for Oxygen Service
preferred testing methods.
G-4.3 Oxygen, Gaseous, Type I B
G-4.3 Oxygen, Liquid, Type II B
1.3 Values stated in SI units are to be regarded as the
G-10.1 Nitrogen, Gaseous, Type I B
standard. The values given in parentheses are for information
G-10.1 Nitrogen, Liquid, Type II B
only.
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2.5 NASA Standard:
1.4 This standard does not purport to address all of the
NSS 1740.15 Safety Standard for Oxygen and Oxygen
safety concerns, if any, associated with its use. It is the
Systems
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
bility of regulatory limitations prior to use. See also Section 9.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
1
This test method is under the jurisdiction of ASTM Committee G04 on Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
Compatibility and Sensitivity of Materials in Oxygen EnrichedAtmospheres and is dodssp.daps.dla.mil.
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the direct responsibility of G04.01 on Test Methods. Available fromAmerican Chemical Society (ACS), 1155 Sixteenth Street, NW
Current edition approved April 1, 2011. Published April 2011. Originally Washington, DC 20036, http://www.acs.org.
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approvedin1984.Lastpreviouseditionapprovedin2005asG86 - 98a(2005).DOI: Available from Compressed Gas Association (CGA), 4221 Walney Rd., 5th
10.1520/G0086-98AR11. Floor, Chantilly, VA 20151-2923, http://www.cganet.com.
2 7
NASA Handbook 8060.1B, Pressurized Liquid and Gaseous Oxygen Mechani- AvailablefromNationalAeronauticsandSpaceAdminstration(NASA),NASA
cal Impact Test, Sept. 1981, pp. 4-72. Headquarters, Suite 1M32, Washington, DC 20546.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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G86 − 98a (2011)
2.6 ASTM Adjuncts:
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ABMA-Type Impact Tester and Anvil
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 GOX, n—gaseous oxygen.
3.1.2 LOX, n—liquid oxygen.
3.1.3 mechanical impact, n—ablowdeliveredbyaplummet
that has been dropped from a preestablished height onto a
striker pin in contact with a sample.
3.1.4 reaction, n—a chemical change or transformation in
the sample initiated by a mechanical impact.
3.1
...
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