Brazing means a group of welding processes wherein coalescence is produced by heating to a suitable temperature above 800 °F and by using a nonferrous filler metal, having a melting point below that to the base metals. The filler metal is distributed between the closely fitted surfaces of the joint by capillary attraction.
Burst pressure means the highest internal pressure reached in a CNG fuel container during a burst test at a temperature of 21 °C (70 °F).
CNG fuel container means a container designed to store CNG as motor fuel on-board a motor vehicle.
Fill pressure means the internal pressure of a CNG fuel container attained at the time of filling. Fill pressure varies according to the gas temperature in the container which is dependent on the charging parameters and the ambient conditions.
Full wrapped means applying the reinforcement of a filament or resin system over the entire liner, including the domes.
Hoop wrapped means winding of filament in a substantially circumferential pattern over the cylindrical portion of the liner so that the filament does not transmit any significant stresses in a direction parallel to the cylinder longitudinal axis.
Hydrostatic pressure means the internal pressure to which a CNG fuel container is taken during testing set forth in S5.4.1.
Liner means the inner gas tight container or gas cylinder to which the overwrap is applied.
Service pressure means the internal settled pressure of a CNG fuel container at a uniform gas temperature of 21 °C (70 °F) and full gas content. It is the pressure for which the container has been constructed under normal conditions.
If the pressure relief device releases before the end of the fifth minute after ignition, then the minimum temperature requirement does not apply.
49 C.F.R. §571.304