23 July 2003
The electrical hull penetrator is part of the primary pressure
boundary. Therefore, pressure test data should be provided to
ensure that its hydraulic life is defined in relation to the
design life of the hull and thermal shock to the connector.
pressure test facility and provided internally through ports,
light pipes, or other suitable means. In this case, infrared
filters or other means may be required to dissipate heat from the
When lights are installed inside an unmanned pressure test
facility chamber or capsule, the housings must be adequately
designed so as not to explode or implode, and the wiring to the
fixture must be sufficiently rugged to withstand inadvertent
impact and mechanical loads without causing a fire or shock
isolated from the unmanned pressure test facility personnel, but
not located in a manner that might subject it to erroneous
readout. Electrical failure of one instrument must not impair
its intended environment and must not create a fire, electrical
or toxic hazard.
ENVIRONMENTAL CONDITIONING COMPONENTS
hull whenever possible. Heated/cooled gas or water may flow
through the pressure hull, or the hull itself may be
heated/cooled. If the hull is to be heated or cooled by an
electrical device, the applicant should provide verification that
no electrical current may pass through the hull.
The applicant should demonstrate the operability and
reliably under worst-case conditions. Mean time between failures
must be longer than the longest mission duration. A
comprehensive operation and maintenance technical manual,
including troubleshooting instructions, should be developed and
submitted for review.
The designer should furnish detailed design information for all
the SCA must clearly discuss the capability of the system to
function in the intended environment (i.e., temperature,