“…For example, Peng, Chang, Wu, Tsaur, and Chen (2008) such a loosened retainer has been shown to have indefinitely delayed ignition by Ngai et al (2007). The operator in this case did not notice the unignited silane release from the loosened retainer and continued to turn the valve handwheel until eventually the retainer, valve stem, and valve diaphragm were all detached.…”