Confined Space Flashcards
What is the atmosphere testing we need to entre a confined space?
20.9% Oxygen by volume
0 < 5% 0f LEL (5 - 10%)
0 ppm of H2S (10 - 15 ppm)
0 ppm CO (30 - 150 ppm)
the detector will read Carbon monoxide 0 – 100ppm Flammable gases 0-100% LEL Hydrogen sulphide 0 – 50ppm Oxygen 0 – 25%VOL
The Procedure of entry a confined space?
. Identify the enclosed space to be entered
. Appoint a competent person to oversee the entry
. Identify the hazards in the enclosed space
. Assess the risk associated with the identified hazards
. Carry out the control measures to eliminate or reduce
the risk, including
. Elimination
. Substitution
. Isolation, (ie ventilation)
. Engineering
. Administrative control
. PPE
. Ensure the entry requirements are met, including
. Atmosphere testing
. Isolating equipment and tagging out
. Completion of entry permit and posted near entry
. Obtain hot work permit if needed
. Obtain work permit if needed
. Stand by person present
. Communication maintained
. All relevant personnel/authorities notified
. signposting erected
. emergency equipment available
. emergency procedures prepared and rehearsed
. Competent person to ensure that all safe enclosed
space working practices are observed during the
operation
. On completion of the work, the space is returned back
to service
. All records and reports are completed and dealt with
as required.
Confined space drills, how often?
at least every 2 months. SOLAS
What is H2S?
Hydrogen sulfide (H 2 S) is a colourless gas with a characteristic odour of rotten eggs which being denser than air may pool in low areas in still conditions. Where does hydrogen sulfide come from?
What is carbon monoxide
For example, 0.5 – 5 ppm is the typical amount that one would find outdoors in a major metropolitan area and carries little to no risk of side effects. However, if an individual spent 8 hours in a confined space where the gas level sat at 50 ppm, they could expect to have a headache and dizziness
