Standard Test Method for Determining Pressure Decay of Inflatable Restraint Cushions

Importancia y uso:

5.1 This test method may be used for product development and design, production validation, manufacturing process control, lot acceptance, or for a combination thereof.

5.2 The rate of inflation in this method does not attempt to mimic that of an actual cushion deployment, nor is it intended to subject the cushion to the dynamic loads, stress, and temperatures during such an event. It is also recognized that the compressed air used for this tests may not leak through the cushion at the same rate as the gas or mixture of gasses typically used in cushion inflators. Rather this method is intended to give a relative indication of the pressure holding ability of the cushion.

5.3 The internal volume and internal design of cushions varies greatly. This test method is most useful when comparing data from cushions of the same design and volume. This test method does not provide any data concerning the volume of gas leaking from the bag. At certain higher levels of the initial internal pressure, this test method will irreversibly damage the cushion and change its leakage properties for future testing or for commercial use. The damage to the bag is dependent on the design or shape of a specific bag and the type of coating applied. It is the responsibility of the supplier and/or purchaser to determine if the parameters under which a cushion is tested will be destructive and render the cushion unfit for future use

5.4 Within the limits of variance expressed in Section 12, this test method is useful for design and production validation and may be suitable for incorporation in a cushion specification or for lot acceptance testing of commercial shipments.

Subcomité:

D13.20

Volúmen:

07.02

Número ICS:

43.040.80 (Crash protection systems and restraint systems)

Palabras clave:

airbag; inflatable restraint; pressure decay;