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Title: Using Vacuum Excavation Equipment In The Presence Of Natural Gas
Author: James E. Huebler, George Ragula
Source: American Gas Association 2002
Year Published: 2002
Abstract: Vacuum excavation has been used by the gas distribution industry for several decades. Recently there has been a large increase in vacuum excavation, including at locations with leaking gas. Some of the more popular hoses, purchased at home building supply stores, are favored because they are inexpensive and lightweight. However, they are also good at creating static electricity. Several utilities have raised questions about the safety of these systems. Can air/gas mixtures occur in the flammability range in the hose and vacuum components? Can the static electricity in the hose or a flying rock hitting the back wall of the soil collection tank ignite the flammable mixture? Will a fire or explosion occur? Has the industry been lucky? Or is the system safe? This paper reports the latest results in an ongoing study at Gas Technology Institute (GTI) to answer these questions.

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