HSE Change Occupational Exposure Limits for Gases

January 4, 2019 Yvonne

January 4, 2019 In Boilers, Confined Space, Health & Safety, Steam

The HSE has changed the exposure limits to the following:

GAS TYPE

TWA

STEL

CARBON MONOXIDE (CO)

Now: 20ppm

Was: 30ppm

Now: 100ppm

Was: 200ppm

HYDROGEN CYANIDE (HCN)

Now: 2ppm

Was: 25ppm

Now: 4.5ppm

Was: 10ppm

NITROGEN MONOXIDE (NO)

Now: 0.5ppm

Was: 1ppm

Now: 0ppm

Was: 35ppm

NITROGEN DIOXIDE (NO²)

Now: 0.5ppm

Was: 1ppm

Now: 1ppm

Was: 5ppm

SULPHUR DIOXIDE (SO²)

Now: 0.5ppm

Was: 0.5ppm

Now: 1ppm

Was: 1ppm

Please visit the HSE website for the full details: http://www.hse.gov.uk/index.htm

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