1.1 本规程涵盖了在高压下进行过压试验期间和之后，使用空气加压设备评估安全气囊垫物理性能的程序和条件，该试验能够导致气囊垫爆裂。 1.2 结合本规程可获得的物理性能特征是由仪器确定的内部缓冲压力和由目视检查确定的材料完整性。 1.3 本规程适用于所有安全气囊垫。 1.4 买方和供应商可通过协议使用本实施规程中规定以外的程序和仪器，并在报告中确认与本实施规程的具体偏差。 1.5 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中规定的值不是精确的等价物；因此，每个系统必须相互独立使用。 1.6 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.7 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 本规程旨在作为安全气囊重复测试、安全测试和准确数据收集的一般指南。缓冲过压测试可用于设计和生产验证、制造过程控制、批次验收或其组合。 5.2 本规程规定了对安全气囊进行气囊过压测试的条件、装置和程序。其旨在作为制定缓冲规范或同等文件的指南。 当（基于经验）考虑设备、缓冲设计或其他因素另有规定时，本规范中的实践可能会偏离本文所述的实践。 5.3 垫层配置和设备设计有多种多样性，从而避免了垫层超压的标准试验方法。因此，当描述用于测试特定座垫几何形状和装置设计的测试方法时，座垫规范应包含本文所述的实践。为确保准确性和可重复性，本规范还应以符合ASTM规定程序的方式，并符合特定缓冲几何形状、使用的设备和测试程序的方式，解决精度和偏差问题。 5.3.1 缓冲过压测试程序的变化来源包括孔口尺寸、连接夹具、传感器位置、连接方法、是否存在内部气囊、蓄能器尺寸和压力、传感器类型和位置、是否存在系带、是否存在排气塞以及计时装置和压力传感器的准确性。适用规范中应说明所有设备来源和程序变化。 5.4 根据适用规范，缓冲垫可以在不破裂的情况下加压，以确定其对固定水平的高内压的阻力，或者可以承受越来越大的压力，以确定其极限破裂强度。

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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== 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 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 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. 5.3 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. 5.3.1 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. 5.4 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 may be subjected to increasing pressures to determine their ultimate bursting strength.