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Title: Transcos System Of Large And Small Volume Odorant Injection And Monitoring
Author: Gordon E. Marttila
Source: 1971 Appalachian Gas Measurement Short Course
Year Published: 1971
Abstract: By reason of its tariff and to fulfill certain regulatory requirements, Transco has been odorizing a major portion of its sales gas since the firm launched into operation in 1950. In the past twenty-one years, system deliveries have grown from approximately 350 MMCF/Day to nearly ten times that figure today. Transcos odorization program has also grown during this period to keep pace with the increasing volumes by improving odorization techniques. There are now some 150 odorizer installations on Transcos system, odorizing volumes from several thousand cubic feet per hour to one hundred million cubic feet per hour. In round figiu-es, Transco is currently injecting 400,000 lbs. of odorant through these odorizers each year. The odorant, made to Transcos specifications, is a 100% mercaptan mixture composed of approximately 75% tertiary butyl mercaptans and 25% isopropyl and heavier mercaptans.

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