As home to supermajors, as well as a plethora of smaller, independent energy players, the US boasts one of the largest concentrations of energy personnel in the world. With its insatiable appetite for energy resources, the United States is the world's single largest consumer of oil, using as much as 20.73 million barrels per day as of 2008. Recently, interest has peaked in the vast quantity of untapped natural gas resources in the US, the reserves of which were inventoried in 2008 at 238 Tcf, with producers specifically targeting the nation's promising shale formations for this energy commodity.
Welding is a type of fabrication that is used to join metals or thermoplastics together by fusion. This is done by heating and melting part of the material and often adding a filler material which when cooled will form a strong bond. Pressure may also be used to weld, with or without the application of heat.<br/>There are different methods of welding used depending on the type of materials and desired end result, and Welders must be properly qualified for the type of welding work carried out.