When odorized natural gas flows through a newly commissioned pipeline, the odorant, an organosulfur compound known as mercaptan, is adsorbed into the pipeline interior making the gas odorless and consequently a hazard to all end users. Until the pipeline is coated with odorant, or pickled, significant odor fade will occur. This naturally occurring pickling process can take a couple of days to several months depending on pipe length, pipe diameter, flow rate, etc. Engineered pipeline pickling is the process of injecting odorant into the pipeline and gas stream to expediate the pickling process and protect end users.