Corresponding measures have been taken in the aspects of spiral steel pipeline anticorrosion, pipeline design and construction, and dealing with complex environments in the West-East Gas Pipeline Project to ensure the safety of steel pipelines.
During the design and construction process of the West-to-East Gas Pipeline Project, we always take the safe selection of pipelines with different wall thicknesses as the first consideration. According to the natural environment conditions along the engineering pipeline and pipeline reliability requirements, in terms of pipeline anticorrosion, the joint protection method of external anticorrosion coating and forced current cathodic protection is adopted. The external anti-corrosion layer of the pipeline adopts three layers of PE anti-corrosion, and cathodic protection stations are set up on the whole line 42 seats. Through the current situation assessment, forecast assessment, and comprehensive assessment of the hazards of various geological hazards. Divide the risk level, determine the main types and degrees of geological disasters, evaluate the suitability of the land, and put forward countermeasures and suggestions for preventing and controlling geological disasters; Pipelines in high-intensity areas have been checked against earthquakes, and station engineering design is fortified according to the seismic intensity of the area; the preliminary design includes seismic design for 8 active faults that intersect with pipelines.
At the same time, by the relevant provisions of the design code, different design coefficients are used to ensure the safety of pipelines passing through different regions and the environment. For complex and difficult sections where the pipeline passes, the design safety factor of the pipeline is locally increased to ensure the safety of the pipeline in special sections. The width of the construction work belt of the West-to-East Gas Pipeline is 28 meters (plain) and 18 meters (mountainous); the section of the pipe trench is generally trapezoidal, the width of the upper opening of the excavation shall not exceed 5 meters, and the depth of the pipe trench shall generally not exceed 2.5 meters.
To ensure the safety of pipelines passing through large rivers, mountains, and other areas, passing methods such as crossing, tunnel crossing, and pipe jacking are adopted respectively; appropriate pipeline protection measures are taken for different areas where the pipeline passes, such as in the desert Gobi in Xinjiang and Gansu In the area of windbreak and sand fixation, in the Henan-Anhui Plain and the Jiangnan water network area, the main purpose is to stabilize the pipeline and so on.
During the construction of the West-to-East Gas Pipeline, great attention was paid to environmental protection along the Qian
The ecological environment along the West-East Gas Pipeline Project is complex and changeable. We carried out the subject of “regional ecological environment security, restoration, and component research along the long-distance pipeline”, systematically analyzed the relationship between pipeline construction and the ecological environment along the way, and proposed Requirements for ecological environment protection and restoration, and draw up specific technical charts for ecological environment protection and restoration. In the pipeline construction, establish and improve the QHSE management system of all parties involved in the project construction, to achieve harmony and unity of pipeline construction and quality, health, safety, and environment. Reduce the damage to the natural environment caused by construction operations, eliminate any environmental pollution accidents during work, and discharge various pollutants after meeting the relevant national standards.
The West-East Gas Pipeline has measures to deal with man-made sabotage
When it comes to pipeline safety, can be defined from these three aspects. One is the safety of the pipeline itself, which is a problem from the design, construction, and management level after it is put into operation. In this regard, I think the West-East Gas Pipeline Project has already made a lot of preparations. The second is natural disasters, wars, and other impacts, it is called force majeure. This point has also formed a consensus in the design stage of the entire project. The third is the destruction of the human factor you mentioned. In this regard, we are starting to do some preventive work. The West-East Gas Pipeline has encountered some problems on this issue, and I don’t want to talk about it in detail. Because there have been some cases of occupying the completed pipelines, especially in the water network areas of the south of the Yangtze River and densely populated areas, problems such as road construction, bridge construction, and housing construction will inevitably affect the safety of the pipelines for the West-East Gas Transmission. I think this point needs to be paid great attention to by relevant parties.
It needs to be pointed out that it is very important to further coordinate with the local governments along the pipeline to establish an effective management method for pipeline safety protection. At the same time, I think that it is necessary to legislate on the protection of pipelines and increase the punishment for those criminals who destroy pipelines. Make a positive impact.
Post time: Mar-13-2023