The basic requirements for a pressure test lab are shown above. Although the simplified schematics are self explanatory, some features warrant special attention. The process of pressurizing, heating, measuring, and recording must be very precise because the operational collapse margins of the housings are small. Any substantial error in the process could constitute the difference between a non-destructive test and an erroneously destructive one, invalidating the purpose of the test, which is the destruction of only the faulty housings. In order to limit the possibility of human error and/or equipment flaws, our process is under the joint control of several computers and a skilled technician. Each monitors and controls a specific aspect of the process, such as the pumping, bleeding, heating, circulating, etc. All the computers are interlocked by way of alarm levels and redundancy. The process is complex as a result of the massive -as well as diverse- thermal load requirement for each unique test condition. Each pressure/temperature cycle is documented with a chart recording showing the various pressure and temperature fluctuations sustained by the specimen during the cycle.