This table was reviewed on 26 February 2020, and refers to the scope for EffecTech in the UK only (Issue No. 052).

For the most up-to-date information, as well as the scopes for EffecTech Gases PvT Ltd (India) and EffecTech Qatar, see EffecTech’s ISO 17025 scope.

Blast furnace gas mixtures

Secondary Reference Gas Mixtures
component range calibration and
measurement capability
(CMC)*
amount fraction (% mol/mol) amount fraction (% mol/mol)
nitrogen 27 to 54 0.25 % relative
carbon dioxide 20 to 31 0.25 % relative
hydrogen 1 to 16 0.25 % relative + 0.03
carbon monoxide 20 to 31 0.25 % relative
* The calibration and measurement capability is based on a standard uncertainty multiplied by a coverage factor k=2, providing a level of confidence of approximately 95%. The uncertainty evaluation has been carried out in accordance with UKAS requirements

 

Basic Oxygen Steelmaking gas (BOS)

Secondary Reference Gas Mixtures
component range calibration and
measurement capability
(CMC)*
amount fraction (% mol/mol) amount fraction (% mol/mol)
nitrogen 11 to 30 0.2 % relative + 0.02
carbon dioxide 12 to 20 0.2 % relative + 0.02
carbon monoxide 45 to 75 0.15 – 0.1 % relative
hydrogen 0.4 to 3.0 0.5 % relative + 0.002
oxygen 0.3 to 1.3 0.7 % relative + 0.0005
* The calibration and measurement capability is based on a standard uncertainty multiplied by a coverage factor k=2, providing a level of confidence of approximately 95%. The uncertainty evaluation has been carried out in accordance with UKAS requirements