Issues related to working in confined spaces; seeking advice
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What is the work procedure for technicians to perform internal inspections on liquefied petroleum gas (a flammable and explosive substance) storage tanks, wearing positive-pressure air respirators? Is it the same as working without a positive-pressure air respirator?
To enter the interior of a storage tank for inspection, it is necessary to first isolate the system and ensure that its conditions are suitable (i.e., appropriate oxygen and flammable gas levels). Once these conditions are met, a positive-pressure air respirator is used only in emergency situations or under special circumstances
Note, OP: Wearing a positive-pressure air respirator is one of the safety measures, not part of the procedures for working in confined spaces. Working in confined spaces is a type of special operation that involves significant risks and requires special attention. It is necessary to first study carefully the safety management regulations for such operations, identify the risks, eliminate or control them, and establish and implement safety measures. If it is indeed impossible to keep the oxygen level within acceptable limits or to control toxic gases at manageable levels, or if there are uncontrollable toxic gases present, a positive-pressure air respirator should be used as a protective measure. However, flammable and explosive gases must meet control standards.
The replacement meets the requirements (oxygen levels are acceptable, toxic gas concentrations and flammable gas concentrations are within safe limits). Forced ventilation is required; a positive-pressure respirator must be worn, a life rope must be attached, and a 4-in-1 safety device must be carried. In case of an alarm, evacuate immediately； It is necessary to consider whether there are still tasks such as setting up scaffolding inside the tank
Agree with what was said on the third floor； Wearing a positive-pressure air respirator is an emergency measure, not part of the standard operating procedure ；