Consideration will all so given to the following content of the confined space: Partitions ,which may be in the space creating areas with different atmospheres. Potential for dripping of liquids from over head trays or compartments. Potential for retention of vapour pockets due to partitions. Internal coasting ,which may give off toxic vapours if heated or damaged. Potential toxic vapours from cleaners or welding. Sludge & scale which may give off vapours when disturbed. Mechanical and structural hazards. Suitable means of ingress and egress.
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prequation
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Sufficient access to the confined space access / egress point will be maintained for rescue vehicles and personnel.Self contained breathing apparatus will be available at entry to confined space .RESCUE BREATHING APPARATUS WILL HAVE A RESUSCITATOR ATTACHMENT .SO THAT AIR CAN BE ADMINISTERED AS SOON AS THE VICTIM IS REACHED AND IN CASES WHERE THERE WILL BE DIFFICULTIES OR DELAYS IN MOVING VICTIMS.Erection of signs at the entry of all open man holes,tunnels ,vessels ,stating danger ,confined space:Do not enter or similar appropriate wording.Erection signs at manhole ,covers ,severs,tanks and vessels stating men working,confined space ,Do not close.
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There will be radio communication beet ween the safety watch & site safety supervisor.As supplement to radio communications an air horn or portable siren will be used by the workers inside the confined space to alert the safety watch in case of an emergency .Where possible a life line will run from the access / egress point to the location of the workers to felicitate rescue operations.Where practical ,each worker will wear harness attached to the life line facilitate efficient rescue operations.Trained personal out side the confined space will aid an rescue operations.
Confined space
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Purging the air out of the space with inert gas such as nitrogen or CO2.Ventilation's to keep the fuel vapours below the LEL.Eliminating sources of ignition such as friction,Sparks,open flames & sparks from exhaust or electrical equipment.Bonding & grounding vessels to reduce static electricity.Shutting of torch valves at a point out side the confined space will be left unattended for any length of time,such as a lunch brake.Torches & hoses will be removed from the confined space when left over night.Take no smoking policy around the confined space.Storing all combustible & flammable material out side the confined space until ready for use.Leaving gas cylinder & welding machine outside.
Responsibility of safety watch
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Maintaining a log of all personnel inside the confined space.Workers will sign in and out each time they enter or leave the confined space.Has ion his possession,a functioning air horn with which to enunciate any emergency or evacuation procedures.Remaining at the assigned post at all times that personnel are inside the confined space.Ensuring that all personnel whop enter the confined space have the appropriate PPE.Being familiar with the emergency reporting procedures & assisting with rescue operations.The safety watch will ensure that the precribed rescue equipment is on hand.
Lighting & safety watch (confined space)
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Explosion proof lighting will be used where there is a potential for flammable products to be present.All 110 volts lighting will be protected by Ground fault interrupters and bird caged.In case of presence of flammable gas,it is advisable to use 24 volts.All personnel in confined space & the safety watch will carry portable lighting in case of power failing.All confined space entries shall have a safety watch posted immediately outside the confined space,who will be able to communicate with workers inside.He should be readily visible and identifiable by reflective vests.
Some important procedure to prior the entry
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In addition to standard Ppe an assessment will be carried out to determine4 additional PPe requirements.Such as fall protection , Respiratory protection etc.Workers will be trained in the proper use of all ppes & will be familiar with their limitations.Natural ventilation in confined space is minimal.There fore ventilation by mechanical means shall all ways be made available. Ventilation equipment will be positi...