6.2 Testing for oxygen
Any atmosphere with less than 20.9% (± 0.2%) oxygen by volume should not be entered. Oxygen measurements should be carried out by, or under supervision of, the surveyor immediately before entry into the confined space.Measured by o2 analyser
6.3 Testing for flammable atmosphere
A space with an atmosphere with more than 1% of the “Lower Flammable Limit” (LFL) or “Lower Explosive Limit” (LEL), on a combustible gas indicator should not be entered.(0.01)
The Flammability indicator shows the percent within a safety range of 0-10% of the Lower Explosive Limit (LEL) and, ideally, should read 0%.
Combustible gas detectors have normally two measuring ranges 0-100% LEL and 0-10% LEL.
6.4 Testing for toxic atmospheres
Toxins are measured in parts per million (PPM). Under no circumstances should the surveyor enter a confined space exceeding the limits specified below. Different testing bodies throughout the world may, however, have different acceptance limits. (Below TLV).Measured by dragger tube
Any atmosphere with less than 20.9% (± 0.2%) oxygen by volume should not be entered. Oxygen measurements should be carried out by, or under supervision of, the surveyor immediately before entry into the confined space.Measured by o2 analyser
6.3 Testing for flammable atmosphere
A space with an atmosphere with more than 1% of the “Lower Flammable Limit” (LFL) or “Lower Explosive Limit” (LEL), on a combustible gas indicator should not be entered.(0.01)
The Flammability indicator shows the percent within a safety range of 0-10% of the Lower Explosive Limit (LEL) and, ideally, should read 0%.
Combustible gas detectors have normally two measuring ranges 0-100% LEL and 0-10% LEL.
6.4 Testing for toxic atmospheres
Toxins are measured in parts per million (PPM). Under no circumstances should the surveyor enter a confined space exceeding the limits specified below. Different testing bodies throughout the world may, however, have different acceptance limits. (Below TLV).Measured by dragger tube
THESE VALUES ARE TAKEN FROM IACS ENCLOSED SPACE SAFE PRACTICE.
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