Natural gas in Industries is a field of studies that has recently been object of concern and research in universities and research centers. This analysis has become more evident due to several factors as the increasing use in industries of the natural gas replacing the combustible oil (BPF) in your energetic matrix. The aim of this article is introducing some considerations about ergonomics and safety of work of the Industries which use the Natural Gas, analyzing the changes occurred with after your introduction. The industrial consumers were stratified in several variables, such as: Kinds of the Industrial Production; Geographical location; Gas consumption in the industry, among others. Although the geographical location of the studied companies was in the eastern Northeast (PB and PE), the results can be generalized in the measure in which they were boarded global characteristics big size companies, almost all owning or trying to obtain quality certifications, environmental and safety engineering.