Provides guidance regarding the fire and explosion hazards which may arise when tanks and vessels which have contained flammable gases and liquids, are gas-freed or cleaned for repair work. The guidance is aimed at all those who are responsible for the planning or supervision of this type of activity. Some reference is also made to health hazards. The guidance is intended to apply to land-based installations only. Contents: Hazards; Preparation for gas-freeing and cleaning; Gas freeing methods; Cleaning methods; Methods of inerting; Gas and vapour detectors; Legal requirements.
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