Machine translation from English source
Tanks not containing gas
It is emphasized that entry into tanks known to be gas-free or oxygen deficient should only be permitted in exceptional circumstances and in the absence of a practicable alternative. In this extremely dangerous situation, the personnel involved must be well trained in the use of breathing apparatus and aware of the dangers of removing their breathing apparatus in a hostile atmosphere.
When it is necessary to enter a tank or compartment where there is a suspicion that the atmosphere contains a toxic gas or is deficient in oxygen, or that these conditions may occur during a period of occupation, the master or chief officer must be responsible for the ongoing supervision of the operation and must ensure that:
The captain became convinced that there was practically no alternative to the proposed method of entry and that such an entry was necessary for the safe operation of the vessel. The master has completed the "Entering Confined Space" security check.
Ventilation is provided where possible (working on tankers without experience).
3. Personnel use breathing apparatus and a life preserver.
4. The number of people entering the tank is kept to a minimum according to the work being done.
5. A means of communication and a signaling system is provided that is understandable to the personnel involved.
agreed and
Spare SCBA kits (and resuscitators, if available) are ready outside the bay, and a backup team is present in case of an emergency.
ATMOSPHERE TESTING (work on tankers without experience)
Where applicable, room testing should only be carried out by persons trained in the use of the equipment.
Testing must be carried out before entry and at regular intervals. Testing must be conducted from deck level. However, in some cases additional testing may be required from inside the tank/hold, in which case the tester must wear breathing apparatus and be secured by a lifeline conducted by a qualified person located on deck. Communication must be maintained using walkie-talkies.
Where necessary, testing should be carried out at different levels. Personal monitoring equipment intended solely to warn of oxygen deficiency and hydrocarbon concentrations should not be used as a means of determining the safety of a space.
TESTING FOR OXYGEN DEFICIENCY (work on tankers without experience)
A steady reading of 21% oxygen volume must be obtained on the oxygen meter before entry is allowed. It is important that the operating instructions and maintenance schedule for the relevant meter are strictly followed. The flammable gas indicator cannot be used to detect oxygen.
FIRE (work on tankers without experience)
It is critical to install fire watches with portable fire extinguishers and fire hoses where necessary (SEE PRECAUTIONS) when hot work is in progress and continue to service the watch for two hours afterwards to control for possible re-ignition from hidden smoldering debris.
