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| F & A |
| The development of pipeline valve |
In 1914, the first 9 km-long pipeline into the central United States, from the prelude to industrial development pipeline opened. Using pipelines to transport liquids or gases, the cost of rail transport 1 / 3 sea transport to 2 / 3 and so nearly a century to get a rapid development. Long-distance pipeline funding, described as long-distance pipeline, long-distance pipeline valves used on the funding, described as pipeline valves, with ball valve, gate valve, check valve, plug valves, is a pipeline to meet the special requirements of with a dedicated special function valves. Ball claimed that the pipeline for the ball. Regulate the technical standards for pipeline valve was awarded the American Petroleum Institute's API specification 6D "oil and gas industry - pipeline - pipeline valves", the latest version of the January 2000 edition of the enactment of section 22, and in 1999 the international standard ISO14313-issued 1999.
In fact the rapid development of pipeline industry of the twentieth century, the fifties thing, according to "Pipeline" magazine in 2000 statistics, the world's 2.6 million kilometers have been built pipeline, of which 800 thousand kilometers pipeline, gas pipeline 1.4 million kilometers, other petrochemical products pipelines and 400,000 kilometers. Oil pipeline is an energy supply line is a lifeline, have spread throughout the world, and each year is still increasing speed of 30,000 kilometers. Pipeline valves maximum pressure level PN42.0Mpa (Class2500), maximum diameter 60-inch valve (DN1500).
The world's leading long-distance pipeline, such as Alaska to the Atlantic coast of Long Island, east of crude oil pipeline through the Arctic permafrost and the United States Great Lakes marshes; Russian Trans-Siberian oil pipeline; Mediterranean region, from Algeria to Spain via Morocco The gas pipeline length of 2,000 km across the desert, the Atlas Mountains and the Strait of Gibraltar; in Southeast Asia from the Philippines through Malaysia, the Java, Sumatra, to Thailand gas pipeline length of 6276 kilometers, of which 1094 kilometers undersea gas distribution pipelines, and so on.
Ball valve structure can be traced back in 1904, has been applied for the structure of the patent, but has not been commercialized, and its development is also the 20th century, 50's thing, this is because in 1943 the United States the invention of DuPont's Teflon Plastic This material has a certain degree of flexibility and self-lubricating, good resistance to corrosion, very suitable for use as the valve sealing material. As well as the cars ball machine, ball machine progress. Because of this valve is a full-diameter, low flow resistance, is very suitable for use as a long-distance pipeline valves, pipeline ball it has been gradually replaced by pipeline valve, plug valves, is a past 50 years the fastest-growing one valve new varieties |
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