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Title: How Company Tariffs Impact Sampling Procedures
Author: Brad Massey
Source: 2008 Natural Gas Sampling Technology Conference
Year Published: 2008
Abstract: A tariff places limits on gas quality specifications for a specific company. The management of various gas quality parameters in the pipeline industry requires monitoring to insure the integrity of the pipeline and the merchantability of the gas are not compromised. The awareness of the importance of this monitoring is becoming increasingly apparent throughout the industry. Review and further development of tariffs in order to maintain pipeline integrity without limiting supply options has become a challenge for a good number of pipeline operators. Often times, tariffs are written by people that dont fully consider operating conditions or sampling practices. A key consideration is how the impact of gas quality on operations has become increasingly important due to variations in the gas supply quality. Depending on how a tariff was submitted it can be quite restrictive on how gas quality specifications can be enforced or in some cases the manner in which the gas quality determination can be made. Conversely the tariff may not be restrictive enough to insure control limits are adequate. Depending on how a tariff is written, may influence how a company obtains gas samples. By not fully considering the influence of all constituents, existing conditions or by excluding specific methods of determination the outcome of the analysis may not provide the most accurate results. Careful consideration should be given when writing or re-writing gas quality limits as well as specifying sampling methods or determination procedures within a gas tariff.

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