Natural gas steel pipe refers to the pipeline that transports natural gas (including associated gas produced in oil field) from the production site or treatment plant to urban gas distribution center or industrial enterprise users, also known as gas transmission pipeline.
Using natural gas pipeline to transport natural gas is a way to transport natural gas on land. Natural gas pipelines account for about half of the world's total pipelines.
Natural gas pipeline transportation has the advantages of low transportation cost, less land occupation, fast construction, large oil and gas transportation volume, high safety performance, less transportation loss, no "three wastes" emission, small leakage risk, small environmental pollution, little impact by adverse climate, small amount of equipment maintenance, easy management and remote centralized monitoring.
Gas transmission pipeline can be divided into three types according to its use: gathering pipeline, gas transmission pipeline and gas distribution pipeline.
Gas gathering pipeline: the pipeline from the wellhead of the gas field to the gas treatment plant or starting compressor station through the gas gathering station, mainly used to collect the untreated natural gas extracted from the formation. Due to the high pressure of gas well, the pressure of gas gathering pipeline is generally more than 100kgf / cm2, and the pipe diameter is 50-150 mm.
Gas transmission pipeline: the pipeline from the gas treatment plant or starting compressor station of the gas source to the gas distribution center, large-scale users or gas storage in each big city, as well as the pipeline connecting the gas source, which is the main part of the whole gas transmission system after being processed to meet the pipeline transmission quality standard (see pipeline transmission process). The pipe diameter of gas transmission pipeline is larger than that of gas gathering pipeline and gas distribution pipeline, and the largest pipe diameter is 1420mm. The natural gas is transported under the pressure of the starting compressor station and the compressor stations along the line. The gas transmission pressure is 70-80kgf / cm2, and the total length of the pipeline can reach thousands of kilometers.
Gas distribution pipeline: the pipeline from the urban pressure regulating and metering station to the user's branch pipeline has low pressure, many branches, dense pipe network and small pipe diameter. In addition to a large number of steel pipes, the low-pressure gas distribution pipeline can also use plastic pipes or other materials.What Kind Of Material Pipe Can Be Used For Natural Gas？
Seamless steel pipe for gas transmission. Compared with solid steel such as round steel, 40 chrome seamless steel pipe has light weight when the bending and torsional strength is the same. 40 chrome seamless steel pipe is an economical section steel used as a pipeline for conveying fluid, such as conveying oil. Natural gas, gas, water and some solid pipes.
Special spiral pipe for natural gas. National standard spiral steel pipe referred to as 9711.1 spiral steel pipe, 9711.2 spiral steel pipe, material classification: 16Mn spiral steel pipe, Q345B spiral steel pipe, L245 spiral steel pipe, L360 spiral steel pipe, X40-X80 spiral steel pipe, mainly used in the oil and gas industry to transport combustible fluids and Non-combustible fluid and steel structure.
Metal hose for gas. It is currently an upgraded product that replaces various steel pipes, galvanized pipes and other metal pipes. The new type of pipe has the advantages of strong connection, corrosion resistance, long service life, convenient installation, simple construction, safe use, softness and good sealing. Since the gas metal hose can be displaced along with the movement of the earth's crust, it is safer for the gas source such as natural gas and liquefied petroleum gas to be connected to the gas pipe of the gas appliance.
No matter which material is used in the pipeline, the connection should be used in accordance with the material, horizontal and vertical, standard installation, and the pursuit of aesthetics.