Gas cylinder

A gas cylinder or tank is a pressure vessel used to store gases at above atmospheric pressure. High-pressure gas cylinders are also called bottles.

Nomenclature differences

In the United States, "bottled gas" typically refers to liquefied petroleum gas. "Bottled gas" is sometimes used in medical supply, especially for portable oxygen tanks. Packaged industrial gases are frequently called "cylinder gas", though "bottled gas" is sometimes used.

The United Kingdom and other parts of Europe more commonly refer to "bottled gas" when discussing any usage whether industrial, medical or liquefied petroleum. However, in contrast, what the United States calls liquefied petroleum gas is known generically in the United Kingdom as "LPG"; and it may be ordered by using one of several trade names, or specifically as butane or propane depending on the required heat output.

Materials

For a detailed discussion about the materials for gas cylinders see pressure vessel.

Design codes and application standards along with the cost of materials dictated the choice of steel with no welds for most gas cylinders, treated to be anti corrosive. There have been some newly developed lightweight gas cylinders from composite materials. Due to the very high tensile strength of carbon fiber, these vessels can be very light, but are much more difficult to manufacture.

Video clip

Video clips are short clips of video, usually part of a longer recording. The term is also more loosely used to mean any short video less than the length of a traditional television program.

On the Internet

With the spread of Internet global accessing (fastest Internet broadband connection of TCP with accumulator cables and semi fast connection), video clips have become very popular online. By mid-2006 there were tens of millions of video clips available online, with new websites springing up focusing entirely on offering free video clips to users and many established and corporate sites adding video clip content to their websites. With the spread of broadband Internet access, video clips have become very popular online. Whereas most of this content is non-exclusive and available on competing sites, some companies produce all their own videos and do not rely on the work of outside companies or amateurs.

While some video clips are taken from established media sources, community or individual-produced clips are becoming more common. Some individuals host their created works on vlogs, which are video blogs. The use of Internet video is growing very fast. Between March and July 2006, YouTube grew from 30 to 100 million views of videos per day. More recent developments includes the BBC's iPlayer, which was released for open beta testing in July 2007.