Fuel Gas Odorization Flashcards
how long have odorants been used for?
over 100 years
What do odorants protect?
They protect life and property
Odorants can be detected at __% of their lower explosive limit
20%
8 criteria to be considered an odorant
- Harmless, non-toxic, and non-nauseating
- penetrating odor
- non-corrosive
- insoluble in water
- retainable by gas not absorbed by mains/meters
- burn w/o harmful/odorous products of combustion
- not set up a chemical reaction
- must be readily available
Most common odorant used for propane is?
Ethyl Mercaptan
Most common odorant used for natural gas is?
T-Butyl Mercaptan
What is the purpose of transmission lines?
To transport gas from the point of origin to the point of use
When are odorants required?
When the population along the transmission pipeline reaches a certain level
When must natural gas pipelines be odorized?
In the distribution lines
What is adsorption?
Adherence to a solid surface by chemical compound
Gas has the highest rate of adsorption to what?
Dry clay and non-painted masonry
4 reasons someone could not detect an odorant
Anosmic, age, illness or cold, and adaptation
What percent of consumers cannot detect fuel gas odorants?
2%
If a consumer cannot detect an odorant what must happen?
A gas detector must be installed
