SAE J2238-2012 PDF
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St SAE J2238-2012
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Ст SAE J2238-2012
Original standard SAE J2238-2012 in PDF full version. Additional info + preview on request
Full title and description
SAE J2238: Airbag Inflator Ballistic Tank Test Procedure — Gas Generating Devices Used in Inflatable Restraint Systems. This SAE Recommended Practice defines a ballistic tank test method for measuring inflator pressure output versus time and provides uniform test, data-recording and safety guidance for repetitive inflator testing and comparative evaluation.
Abstract
SAE J2238 establishes a repeatable ballistic tank test procedure to characterize the pressure‑time output of airbag inflator assemblies. The procedure prescribes test apparatus, instrument calibration, specimen conditioning and data recording to enable consistent laboratory evaluation. The document notes limitations when comparing different inflator technologies because gas temperature, composition and mass‑flow interactions can affect airbag performance beyond the tank measurement.
General information
- Status: Revised (current revision published November 2012).
- Publication date: November 1, 2012 (J2238_201211).
- Publisher: SAE International (Society of Automotive Engineers).
- ICS / categories: Road vehicle systems; bodies and body components — ICS code listed as 43.040.60.
- Edition / version: Revised edition J2238_201211 (November 2012). Original issue dates trace to 1994 with earlier revisions (2001, 2012).
- Number of pages: 28 pages.
Scope
Defines a ballistic tank test method for evaluating inflator assemblies used in inflatable restraint systems. The scope covers test setup, ballistic tank characteristics, instrumentation and data capture required to produce repeatable pressure-versus-time traces for an inflator configuration. It is intended as a general recommended practice for laboratory-level, repetitive testing and data correlation rather than a full system-level performance specification. The practice warns about limitations when using tank results to predict occupant protection because of gas temperature, composition and mass‑flow effects on actual airbag performance.
Key topics and requirements
- Ballistic tank design and minimum volume/porting guidance for inflator tests.
- Instrumentation and transducer calibration to record pressure vs. time traces.
- Specimen conditioning and environmental/test temperature control for repeatability.
- Data acquisition, sampling rates and data formats for correlation and archiving.
- Safety and procedural guidance for conducting high‑pressure inflator tests.
- Limitations and cautions about interpreting tank data for system‑level occupant protection.
Typical use and users
Used by automotive OEMs, airbag and inflator manufacturers, independent test laboratories and supplier quality teams to qualify inflator output characteristics, support design validation, production testing and failure investigation. Also referenced by engineers performing component-level inflator development, inflator acceptance testing and comparative technology assessments.
Related standards
Commonly used alongside other occupant‑protection and inflator requirements and validation documents such as FMVSS 208 / NHTSA occupant protection testing guidance (system‑level regulatory context) and industry inflator validation specifications (for example USCAR inflator technical requirements). SAE information reports and standards on airbag system interactions and vocabulary (e.g., SAE J2189, SAE J1538) are often consulted in parallel.
Keywords
SAE J2238, airbag inflator, ballistic tank test, pressure vs time, inflator test procedure, inflatable restraint system, test apparatus, data acquisition, inflator validation.
FAQ
Q: What is this standard?
A: SAE J2238 is an SAE Recommended Practice that defines a ballistic tank test procedure for measuring the pressure‑time output of airbag inflator assemblies used in inflatable restraint systems.
Q: What does it cover?
A: It covers ballistic tank design considerations, specimen conditioning, instrumentation and calibration, data acquisition and recording requirements, and procedural safety guidance to produce repeatable pressure versus time traces for inflator assemblies. The document also explains limits of using tank data to predict full‑system performance.
Q: Who typically uses it?
A: Automotive OEM engineers, airbag/inflator suppliers, independent test laboratories, supplier quality and validation teams use the practice for component characterization, design validation, production test setup and troubleshooting.
Q: Is it current or superseded?
A: The standard is listed as Revised with the latest revision published November 1, 2012 (product code J2238_201211). There are earlier historical revisions (1994, 2001) and no newer J2238 revision identified in the SAE bibliographic listing to the date of the referenced record.
Q: Is it part of a series?
A: It is produced by SAE's Inflatable Restraints Committee and is typically used in conjunction with other SAE standards and information reports related to airbag systems, inflator validation and occupant protection (for example, SAE J2189 and other SAE J‑series documents).
Q: What are the key keywords?
A: Airbag inflator; ballistic tank; pressure vs time; inflator test; inflatable restraint; SAE J2238; data acquisition; inflator validation.