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Title: Operations And Maintenance Considerations For The Use Of Odorant In Custody Transfer
Author: Jan Strmen
Source: 2004 Appalachian Gas Measurement Short Course
Year Published: 2004
Abstract: The easily recognizable smell of odorants in natural gas signal leaks in transport or distribution pipelines, breakdowns of natural gas appliances or failures in odorization equipment itself. Odorizing of natural gas thus provides a safety net for the public and the natural gas industry. United States and Canada legislated odorant use in 1937 after a tragic accident in London, Texas claimed 293 lives, mostly school children. The main advantage of using mercaptan blends as odorants is in their extremely low odor threshold. For example odor threshold value for tertiary butyl mercaptan, one of the main odorant blend components, is about 0.4 parts per billion. Concentrations of such odorants in natural gas are typically around two parts per million.

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