The reporter was informed on November 15 that the West Pipeline crude oil station project will adopt a low temperature welding process.
Through the discussion and research on the winter welding demonstration meeting of the Western Pipeline crude oil station construction, experts believe that based on the previous research results of low-temperature welding process evaluation and foreign welding construction experience, such as Lanyin Line and Zhongha Line Station, pipeline steel and The materials connected to the pipeline steel are subjected to the necessary measures under the conditions of the submitted welding procedure, and it is feasible to carry out the welding construction in a low temperature environment higher than minus 20 degrees Celsius; the material specifications of the station yard are numerous and the structural form is complex. Avoid the occurrence of defects such as cold cracks and ensure the construction quality of the station. It is recommended to adjust the construction schedule of the station and classify the materials of the station. The materials with wall thickness greater than 22mm and carbon content exceeding 0.2% should be avoided at minus 5 degrees Celsius. Under the environment of minus 20 degrees Celsius; it is recommended to take appropriate measures during the low temperature construction site to ensure the preheating and interlayer temperature of the workpiece and improve the ambient temperature of the welding operation area; for the low temperature welding process without direct reference, it is recommended to add minus 5 Feasibility analysis and demonstration of welding construction from Celsius to minus 20 degrees Celsius.
According to the expert opinion, the Pipeline Bureau successfully broke through the welding of the line engineering in the western pipeline project at an ambient temperature of not less than minus 15 degrees Celsius and the wall thickness of the steel pipe is not more than 16 mm, and low temperature welding will be carried out in the construction of the western pipeline station.
Through the discussion and research on the winter welding demonstration meeting of the Western Pipeline crude oil station construction, experts believe that based on the previous research results of low-temperature welding process evaluation and foreign welding construction experience, such as Lanyin Line and Zhongha Line Station, pipeline steel and The materials connected to the pipeline steel are subjected to the necessary measures under the conditions of the submitted welding procedure, and it is feasible to carry out the welding construction in a low temperature environment higher than minus 20 degrees Celsius; the material specifications of the station yard are numerous and the structural form is complex. Avoid the occurrence of defects such as cold cracks and ensure the construction quality of the station. It is recommended to adjust the construction schedule of the station and classify the materials of the station. The materials with wall thickness greater than 22mm and carbon content exceeding 0.2% should be avoided at minus 5 degrees Celsius. Under the environment of minus 20 degrees Celsius; it is recommended to take appropriate measures during the low temperature construction site to ensure the preheating and interlayer temperature of the workpiece and improve the ambient temperature of the welding operation area; for the low temperature welding process without direct reference, it is recommended to add minus 5 Feasibility analysis and demonstration of welding construction from Celsius to minus 20 degrees Celsius.
According to the expert opinion, the Pipeline Bureau successfully broke through the welding of the line engineering in the western pipeline project at an ambient temperature of not less than minus 15 degrees Celsius and the wall thickness of the steel pipe is not more than 16 mm, and low temperature welding will be carried out in the construction of the western pipeline station.
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