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Title: An Empirical Approach To Evaluating Gas Interchangeability
Author: Hardeep S. Rana, David S. Johnston
Source: American Gas Association 2003
Year Published: 2003
Abstract: The Cove Point (Maryland) Liquefied Natural Gas (LNG) terminal is expected to reopen for importation during 2003. Imported LNG will leave the plant through an 87 mile pipeline on which Washington Gas has five gate stations, serving approximately 1/3 of the utilitys customers. Because the imported LNG may contain a higher proportion of C2+ hydrocarbons (and therefore have a greater heating value) than the domestic natural gas typically received by WG, there is a need to verify that the change in gas supply characteristics will not have an adverse impact on customer appliance performance. WG, in conjunction with the technology and product development company TIAX, used a progressively refined procedure based on actual system experience to establish tentative limits on LNG composition that could be accepted into the system. The viability of the limits wasconfirmed through a small-scale appliance testing program. Further testing may provide a basis for greater flexibility in the limits.

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