It has been suggested that by applying a dynamic pumping technique hydrogen, helium and neon can also be pumped without resorting to dry nitrogen purging.
While the rules permit forms to be modified, the portion of the form providing for the purging of the contempt was stripped out of the committal order, he said.
Other major uses (totalling to about 60% of use in 1996) were pressurizing and purging systems, maintenance of controlled atmospheres, welding, and leak detection.
