Abstract
Double isolation when isolating equipment for maintenance - avoiding
back pressure. The importance of locking valves. Testing the atmospheres
in stacks to avoid explosions in flare and vent stacks. Protection
of live electric equipment. Corrosive liquid leaks. Dangers of inert
gas / lack of oxygen environments. Valve and flange shields. High
pressure water jet cleaners. Sample lines to explosimeters. Slop-over
in water/oil mixtures. Learning from past experience.
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