Pneumatic valve status quo of gas pipelines

by:AIRWOLF     2021-01-15



at present, the largest pipe 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.
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 machinery) 。 Even after the desulfurization process, such as natural gas, there are still residual hydrogen sulfide. 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.
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, building of five horizontal two vertical gas backbone network covering the whole 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.
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