ASTM D5807-08
(Practice)Standard Practice for Evaluating the Overpressurization Characteristics of Inflatable Restraint Cushions
Standard Practice for Evaluating the Overpressurization Characteristics of Inflatable Restraint Cushions
SIGNIFICANCE AND USE
This practice is intended to be a general guideline for repetitive testing, safe conduct of tests, and accurate data collection for inflatable restraints. Cushion overpressurization testing may be used for design and production validation, for manufacturing process control, for lot acceptance, or for a combination thereof.
This practice constitutes the conditions, apparatus, and procedures by which inflatable restraints are commonly tested for cushion overpressurization. It is intended to be used as a guideline in establishing a cushion specification or equivalent document. The practices in the specification may deviate from the practices described herein when (based on experience) considerations of equipment, cushion design, or other factors dictate otherwise.
There exists a large variety in cushion configurations and equipment designs, obviating a standard test method for cushion overpressurization. Therefore, a cushion specification should incorporate the practices stated herein when describing a test method for testing a specific cushion geometry and apparatus design. To ensure accuracy and repeatability, the specification should also address precision and bias in a manner consistent with ASTM prescribed procedures and consistent with the particular cushion geometry, equipment in use, and test procedures.
Sources of variation in cushion overpressurization testing procedures include orifice size, attachment fixture, sensor location, method of attachment, presence or absence of internal bladder, accumulator size and pressure, transducer type and location, the presence or absence of tethers, presence or absence of vent plugs, and the accuracy of timing devices and pressure sensors. All sources of equipment and procedural variation should be addressed in the applicable specification.
In accordance with the applicable specification, cushions may be pressurized without bursting to determine their resistance to a fixed level of high internal pressure, or they m...
SCOPE
1.1 This practice covers the procedures and conditions used to evaluate the physical performance of inflatable restraint cushions during and after overpressurization testing at elevated pressures capable of causing cushion bursting using air pressurization equipment.
1.2 The physical performance characteristics that may be obtained in conjunction with this practice are internal cushion pressures determined by instrumentation and material integrity, determined by visual inspection.
1.3 This practice is applicable to all inflatable restraint cushions.
1.4 Procedures and apparatus other than those stated in this practice may be used by agreement between purchaser and supplier with the specific deviations from this practice acknowledged in the report.
1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other.
1.6 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 Section 8 for specific hazard information.
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Designation:D5807 −08
StandardPractice for
Evaluating the Overpressurization Characteristics of
1
Inflatable Restraint Cushions
This standard is issued under the fixed designation D5807; 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 3. Terminology
1.1 This practice covers the procedures and conditions used 3.1 Definitions:
to evaluate the physical performance of inflatable restraint
3.2 For all terminology relating to D13.20, Inflatable
cushions during and after overpressurization testing at elevated
Restraints, refer to Terminology D6799.
pressures capable of causing cushion bursting using air pres-
3.2.1 The following terms are relevant to this standard:
surization equipment.
cushion, cushion overpressurization, deployment, inflatable
restraint, module, standard atmosphere for testing textiles.
1.2 The physical performance characteristics that may be
obtained in conjunction with this practice are internal cushion
3.3 For all other terms related to textiles, see Terminology
pressures determined by instrumentation and material integrity,
D123.
determined by visual inspection.
4. Summary of Practice
1.3 This practice is applicable to all inflatable restraint
cushions.
4.1 Inflatable restraint cushions are tested under laboratory
conditions to evaluate cushion integrity when exposed to
1.4 Procedures and apparatus other than those stated in this
internal cushion pressures greater than deployment pressures.
practice may be used by agreement between purchaser and
If cushion rupture occurs, the rupture pressure, time to rupture,
supplier with the specific deviations from this practice ac-
and mode of rupture are recorded.
knowledged in the report.
4.2 Inflatable restraint cushions are mounted into a test
1.5 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in stand that allows for inflations under conditions that exceed
deployment pressures. Instrumentation within the test stand
each system are not exact equivalents; therefore, each system
charts inflation pressures versus time and may allow for
must be used independently of the other.
photographic review of the overpressurization sequence.
1.6 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4.3 Cushion overpressurization results are reviewed for
responsibility of the user of this standard to establish appro-
pressure and time relationships, and post-inflation material
priate safety and health practices and determine the applica-
analysis.
bility of regulatory limitations prior to use. See Section 8 for
specific hazard information.
5. Significance and Use
5.1 This practice is intended to be a general guideline for
2. Referenced Documents
repetitive testing, safe conduct of tests, and accurate data
2
2.1 ASTM Standards:
collection for inflatable restraints. Cushion overpressurization
D123 Terminology Relating to Textiles
testing may be used for design and production validation, for
D6799 Terminology Relating to Inflatable Restraints
manufacturing process control, for lot acceptance, or for a
combination thereof.
5.2 This practice constitutes the conditions, apparatus, and
1
This practice is under the jurisdiction ofASTM Committee D13 on Textiles and
procedures by which inflatable restraints are commonly tested
is the direct responsibility of Subcommittee D13.20 on Inflatable Restraints.
for cushion overpressurization. It is intended to be used as a
Current edition approved July 1, 2008. Published July 2008. Originally approved
guideline in establishing a cushion specification or equivalent
in 1995. Last previous edition approved in 2007 as D5807 – 02 (2007). DOI:
10.1520/D5807-08.
document. The practices in the specification may deviate from
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
the practices described herein when (based on experience)
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
considerations of equipment, cushion design, or other factors
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. dictate otherwise.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D5807−08
5.3 There exists a large variety in cushion configurations such that minimal effect on accuracy of the data occurs.
and equipment designs, obviating a standard test method for Overall accuracy of the data acquisition system shall be wit
...
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:D5807–02a (Reapproved 2007) Designation: D 5807 – 08
Standard Practice for
Evaluating the Overpressurization Characteristics of
1
Inflatable Restraint Cushions
This standard is issued under the fixed designation D 5807; 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 This practice covers the procedures and conditions used to evaluate the physical performance of inflatable restraint cushions
during and after overpressurization testing at elevated pressures capable of causing cushion bursting using air pressurization
equipment.
1.2 The physical performance characteristics that may be obtained in conjunction with this practice are internal cushion
pressures determined by instrumentation and material integrity, determined by visual inspection.
1.3 This practice is applicable to all inflatable restraint cushions.
1.4 Procedures and apparatus other than those stated in this practice may be used by agreement between purchaser and supplier
with the specific deviations from this practice acknowledged in the report.
1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system are not exact equivalents; therefore, each system must be used independently of the other.
1.6 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 Section 8 for specific hazard information.
2. Referenced Documents
2
2.1 ASTM Standards:
D 123 Terminology Relating to Textiles
D 6799 Terminology Relating to Inflatable Restraints
3. Terminology
3.1 Definitions:
3.2For definitions of other terms used in this standard, refer to Terminology D123 and Terminology D6799. Definitions:
3.2 For all terminology relating to D13.20, Inflatable Restraints, refer to Terminology D 6799.
3.2.1 The following terms are relevant to this standard: cushion, cushion overpressurization, deployment, inflatable restraint,
module, standard atmosphere for testing textiles.
3.3 For all other terms related to textiles, see Terminology D 123.
4. Summary of Practice
4.1 Inflatable restraint cushions are tested under laboratory conditions to evaluate cushion integrity when exposed to internal
cushion pressures greater than deployment pressures. If cushion rupture occurs, the rupture pressure, time to rupture, and mode
of rupture are recorded.
4.2 Inflatable restraint cushions are mounted into a test stand that allows for inflations under conditions that exceed deployment
pressures. Instrumentation within the test stand charts inflation pressures versus time and may allow for photographic review of
the overpressurization sequence.
4.3 Cushion overpressurization results are reviewed for pressure and time relationships, and post-inflation material analysis.
5. Significance and Use
5.1 This practice is intended to be a general guideline for repetitive testing, safe conduct of tests, and accurate data collection
1
This practice is under the jurisdiction of ASTM Committee D13 on Textiles and is the direct responsibility of Subcommittee D13.20 on Inflatable Restraints .
Current edition approved July 1, 2007.2008. PublishedAugust 2007.July 2008. Originally approved in 1995. Last previous edition approved in 20022007 as D 5807 – 02a
(2007).
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D5807–08
for inflatable restraints. Cushion overpressurization testing may be used for design and production validation, for manufacturing
process control, for lot acceptance, or for a combination thereof.
5.2 This practice constitutes the conditions, apparatus, and procedures by which inflatable restraints are commonly tested for
cushion overpressurization. It is intended to be used as a guideline in establishing a cushion specification or equivalent
...
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