| Application of powder coatings in West Pipeline |
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Powder coating without solvent 100% solid powder coatings. With no solvent, no pollution, saving energy and resources, reduce labor intensity and film and high mechanical strength. It has two categories: thermoplastic powder coating ( PE ) and thermosetting powder coating. Coating made of special resin, pigment and filler, curing agent and other additives, mixed in a certain ratio by hot extrusion, and crushing and Sieving Technology prepared. They are in normal temperature storage stability, electrostatic spraying, spraying ( friction thermosetting method), or a fluidized bed coating ( thermoplastic method ), and then heating molten and solidified to form smooth and bright, permanent coating, reach the decoration and anti-corrosion purpose. According to experts, epoxy powder coating is the most important, which is the best performance of a, with its excellent adhesion, flexibility, and excellent resistance to corrosion and anticorrosion life, market was widespread favor and welcome. With outdoor building materials, household electrical appliances in the swift and violent development, as well as a variety of vehicle is increasing, the coating product demand increases ceaselessly, regardless of the quantity and variety of performance requirements, have put forward many to paint industry, and raw material production plant to solve the problem. Powder coating for painting of its high efficiency, no pollution, and the development of new epoxy powder coating, and especially the new epoxy resin is still of significance. Expert introduction, used in powder coating of new epoxy varieties, as well as the application in the process of current situation and problems.
Heavy duty epoxy powder coatings applied in the Western Pipeline Project
( a ) the introduction
By the China Petroleum Investment Group of the western pipeline project, a total length of nearly 4000km west of crude oil, product oil pipeline, composed of refined oil and crude oil two pipe, it is our country is carried out western big development strategy and project of sex of a mark. According to experts, the pipeline west of Xinjiang Urumqi, Xinjiang, Gansu two provinces way 28 city ( county ), finish at Lanzhou city. Construction of first phase project of two lines, 7 lines, in which the crude oil transportation pipeline length of about 1878km, route design annual throughput of 20000000 T, finished product oil pipeline in new 1930km, route design transmission capacity of 10000000 t. The project total investment of about 14600000000 yuan, is currently China’s largest design throughput, the longest distance, maximum pressure, one of the highest level of oil pipeline. This paper mainly introduces the anticorrosive FBE coating process and properties, and in the western crude oil, finished product oil pipeline engineering application.
( two) all kinds of anti-corrosion material in pipeline anticorrosion application comparison
Since 1855, the United States in the state of Pennsylvania to build the first 9km long oil pipeline since, foreign oil and gas pipeline construction has a history of over 100 years, pipeline transportation is water, oil, gas and other fluid medium effective transmission method, but it has been subject to corrosion problems, to prevent the pipeline corrosion has become a worldwide difficult problem. Because of the pipeline corrosion China annual economic losses amounting to tens of billions of yuan. In industrial developed country, every year because of pipeline corrosion caused economic loss accounted for about 3% of total production value about national. According to experts, therefore, how to improve the anticorrosion technology, reduce the economy loss caused by corrosion anticorrosive industry a long time task.
The service life of the pipeline depends largely on the steel pipe anti-corrosion method, with good coating material and coating method, can make the service life of pipeline to decades or longer. Last centuries before 50 time, anti-corrosion coating materials used mainly for coal tar enamel and other materials make the pipeline to get better protection, but these materials also exist many shortcomings, use subject to certain restrictions, until the late 50’s, heavy anti-corrosion melting powder coating roll makes pipeline protection technology produced a leap, table 1 the United States is an oil and gas transportation company, based on decades of experience of several anticorrosive material evaluation and comparison, we can see that the melting powder coating from the technical angle, or economic perspective are other materials can not be compared. |
| release time:2014/1/2 |
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