Use of materials for gas transmission pipelines

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The last edit to this post was made by xbl240 on 2023-10-28 at 21:14. GB50251 states that the steel pipes used for gas transmission pipelines shall meet the requirements of PSL2 level as specified in the current standard **“Steel Pipes for Pipeline Transportation Systems in the Petroleum and Natural Gas Industry” GB/T9711, as well as the relevant provisions of “Seamless Steel Pipes for High-Pressure Boilers” GB5310, “Seamless Steel Pipes for High-Pressure Fertilizer Equipment” GB6479, and “Seamless Steel Pipes for Fluid Transportation” GB/T8163. GB50423 states that steel pipes used in transmission projects for transporting oil and gas shall comply with the relevant provisions of the current standard **GB/T9711 \"Steel Pipes for Pipeline Transportation in the Oil and Gas Industry\"; in addition, technical requirements shall be specified based on the properties of the medium being transported, the specifications of the steel pipes, the grade of the steel, and the operating conditions. For oil transport steel pipes with a diameter of less than DN300 and a design pressure of less than 6.3 MPa, or gas transport steel pipes with a design pressure of less than 4.0 MPa, seamless steel pipes that meet the requirements of the current standards GB/T8163 \"Seamless steel pipes for transporting fluids\", GB6479 \"Seamless steel pipes for high-pressure fertilizer equipment\", and GB5310 \"Seamless steel pipes for high-pressure boilers\" can be used. For steel pipes used in directional drilling projects for oil and gas transportation as specified in SY/T6968, they shall comply with the current standard **GB/T9711 \"Steel pipes for pipeline transportation systems in the oil and gas industry\"; in addition, relevant technical requirements shall be established based on the properties of the medium being transported, the specifications of the steel pipes, the grade of the steel, and the operating conditions. For oil transportation steel pipes with a pipe diameter of less than DN300 and a design pressure of less than 6.3 MPa, or gas transportation steel pipes with a design pressure of less than 4.0 MPa, seamless steel pipes that meet the requirements of the current standard \"Seamless Steel Tubes for Transporting Fluids\" GB/T8163 can be used. For a gas pipeline with DN200 dimensions and a design pressure of 4.0 MPa that crosses a river and a road along its length, can GB6479-Q345E steel pipes, which are designed for high-pressure fertilizer equipment, be used?