05.07.2009
Pipe that is created from steel plate rolled and welded in a helical fashion
The stripping off of one utility function from the others by selling (spinning-off) or in some other way changing the ownership of the assets related to that function. Such as spinning-off generation assets so they are no longer owned by the shareholders that own the transmission and distribution assets
Brief periods of extreme voltage in an electrical system resulting from adverse system conditions ranging from crossed transmission lines to lightning strikes to switching faults originating at a distribution facility. A strong or prolonged spike can instantly destroy a wide range of electronic equipment, and even frequent spikes of less extreme voltage can cause accelerated deterioration of electronic components. Harmful transients can be short enough that they are measured in millionths of a second, although they could last as long as several seconds depending on the cause and severity. A spike from a lightning strike could last for up to a second and elevate system voltage from several hundred to several thousand volts. A spike from a switching fault could produce tens of thousands of volts of pressure for only a few millionths of a second
The ratio between the weight of a certain volume of crude oil at a fixed temperature and the weight of the same volume of water (the equation was determined by the API)
Relative density to air (natural gas is lighter than air)