The gas pipeline of west-east gas characteristics of pneumatic valves

west-east gas analysis:
the western region of China natural gas to the eastern region, mainly gas to the Yangtze river delta region of tarim basin in xinjiang. Gas pipeline from west lunnan area of tarim oil field in xinjiang, finally arrived, east to hangzhou. Directional provinces and 2 km. Design in gas transmission capacity billion cubic meters, eventually gas capacity billion cubic meters. On all fronts and put into production. Pipeline engineering through the gobi desert, the loess plateau, the taihang mountains, crossing the Yellow River, huai river, the Yangtze river, is currently China's largest diameter and pipe wall, stress the thickest rank highest and largest pipeline engineering technical difficulties, set up a number of domestic gas pipeline leading record, also created the world pipeline uia on high speed. West to east gas pipeline project is completed and operated overall level marks the natural gas pipeline construction in China on a new step, laid the foundation of natural gas pipeline in our country.
it is reported that China will in the west to east gas pipeline project as an opportunity, in overall consideration to the east, offshore and onshore natural gas resources, and actively implement the 'going out' strategy, introduce the foreign natural gas resources, further consummates our country natural gas pipe network development plan, accelerate the main pipes, gas storage, booster station and related regional construction, build cover five horizontal two vertical gas backbone network throughout the country, gradually form west to east gas pipeline, the gas outside the south, near the supply and the supply pattern of air-sea landing, eventually formed mainly from lunnan area, changqing to Beijing line of west to east gas pipeline, the shanxi-beijing lines and the shanxi-beijing two lines, and each, beijing-tianjin-hebei LuJin, Yangtze river delta, northwest, systems and regional natural gas pipe network, finally the natural gas resources, network of supply and the market scale and diversification.
gas pipeline pneumatic valve features:
with the development of natural gas pipeline industry, the dosage of the natural gas pipeline pneumatic valve is more and more big, the natural gas pipeline pneumatic valves are different from ordinary pneumatic valves. Specific have the following:

and materials for pipeline of natural gas contains a large amount of hydrogen sulfide (in front of the desulfurization This is a kind of strong toxic and corrosive gas, it generate iron sulfide and iron reaction, can exfoliate, wear corrosion of mechanical equipment. Even after the desulfurization process, such as there are still residual hydrogen sulfide gas. So the pipeline pneumatic valve selection should choose sulfur corrosion resistance material.
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natural gas pipeline leakage is mostly built on the edge of the city, unlike factories running and management, often have workers in operation, maintenance and inspection. General urban gas pipeline are in the hundreds of kilometers above, only regular patrols, inspection, and pipeline sometimes need through complex region, dielectric loss may bring serious fire accident. Especially in closer from the urban pipeline, it is particularly important to prevent pneumatic valve leakage. Pneumatic valve leakage of natural gas is very strict, usually buried and important pneumatic valves are used in pneumatic all-welded body structure. In order to guarantee pipeline pneumatic valve sealing performance and asked for sealing pair has excellent corrosion resistance, abrasion resistance, since the embellish and elasticity. In recent years the development of polymer materials for the pipeline pneumatic valve seal material selection provides a wide selection of heaven and earth, such as ptfe, nylon, nitrile rubber ( Special synthetic rubber (NBR, VITON, etc. Applications
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the line once put into operation, a few years are not allowed to stop running, the longer run, the better, not like a normal chemical plant or refinery, have overhaul period. Pipeline of natural gas in the face of a large number of users of the whole city, with residents, businesses, factories, etc. , especially the enterprise users with natural gas as raw material, are not allowed to have a moment. Tandem line of pneumatic valve in the line, once the failure consequence is unimaginable. Major line of pneumatic control valve sealing parts, such as pneumatic seat parts requires such as long service life. The general trunk pipeline pneumatic valve life for years.

and drives due to high pressure, large diameter pipeline conveying, fast switching time, the pipeline pneumatic valve need to adopt high torque drive. Such as electric or pneumatic device, gas - Operating or electric - Hydraulic linkage. EExdIIBT drives have explosion-proof requirements, requirements, protection class IP. Because of management control in station or central control room, so the major accidents such as piping in the event of rupture, pipeline pneumatic valve can automatically cut off. Pipeline pneumatic valves for operating force is small, changes in temperature, external force effect, can realize accurate operation. Emergency cut-off pneumatic valve, in particular, must be able to in the fully open position for a long time, rapid closure line when necessary. At the same time, the demands of the opening of the pneumatic valves open and close position and accurate indicator, and easy to understand, to meet the proper switching speed.
west-east gas standard:
SYJ - Oil and gas fields and the long-distance pipeline construction project environmental protection design specification
GB/T - Natural gas processing plant engineering construction project design documentation standard
GB/T - Oil and gas pipeline engineering construction project design documentation standards

west east gas gas valve procurement types with pneumatic pneumatic ball valve, gate valve, globe pneumatic valve, ceramic pneumatic pneumatic valve, check valve, safety valve, etc.