【History of Haichuan Pipelines】China’s most pragmatic refined oil pipeline – Lancheng-Yuzhong Refined Oil Pipeline

【History of Haichuan Pipes】The summary post is being updated continuously; learn about the development process of various pipes at https://bbs.hcbbs.com/thread-3068575-1-1.html (Source: Huahai Chuanliu – Haichuan Chemical Forum Website)

【History of Haichuan Pipelines】The first pipeline for importing crude oil after the founding of the country https://bbs.hcbbs.com/thread-3067088-1-1.html (Source: Huahai Chuanliu – Haichuan Chemical Forum Website)

There is also a crude oil pipeline parallel to this one

Construction of the Lanzhou–Chengdu crude oil pipeline project has begun; it is set to be completed and put into operation next year. April 10, 2011, 10:08 – Huaxi City Daily, by Liu Peng. I want to comment (0). Font size: T|T. According to a report from Huaxi City Daily (reporter: Liu Peng), the much-anticipated Lanzhou–Chengdu crude oil pipeline project officially started construction in Xihe County, Gansu Province, yesterday. The pipeline starts in Lanzhou, passes through Shaanxi to reach Sichuan, going via Guangyuan, Mianyang, and Deyang, before ending in Chengdu. With a total length of 882 kilometers, it is designed to transport 10 million tons per year, and its construction is scheduled to be completed and put into operation next year. By then, Sichuan’s capacity to supply refined oil will **increase**. Its scale of construction is extremely rare. The Lancheng crude oil pipeline is a pipeline with a large elevation difference and high pressure, which is uncommon both domestically and internationally. It passes through areas with complex geology and topography, including loess subsidence zones, the Qinling-Bashan mountain region where geological disasters occur frequently, as well as Sichuan province, which has a dense population and an extensive network of waterways. “The pipeline alone spans over 400 kilometers as it crosses the Qinling mountain range; there are 43 newly built tunnels, with a total length of around 45 kilometers. There are 12 tunnels that are longer than 1.5 kilometers, and the longest tunnel is nearly 3 kilometers in length. ”CNPC stated that the construction of such a large number of pipeline tunnels is extremely rare in the history of pipeline construction in China. Running in parallel with multiple pipelines: In addition, this oil pipeline runs in parallel with several existing and under-construction high-pressure oil and gas pipelines. Among them, it runs parallel to the Lanzhou-Chengdu-Yichang pipeline for 129 kilometers, and parallel to the Lanzhou-Zhengzhou-Changsha pipeline for 14 kilometers. Under such circumstances, ensuring the safe operation of the existing pipelines while simultaneously advancing the construction progress and quality of the pipelines under construction represents a major challenge in pipeline construction. According to CNPC, the Lancheng crude oil pipeline project is an important part of China’s energy strategy in the northwest region, and it represents a key infrastructure project that is crucial for the layout of the energy industry. Once the project is completed and put into operation, it will effectively promote the development of the petrochemical industry base in our province, improve the layout of the petrochemical industry in southwestern China. It holds great significance for advancing the development of the western region, fostering coordinated growth of the local economy and related industries, as well as for international cooperation in oil, gas, and energy sectors in Central Asia. Enhancing Sichuan’s oil supply capacity: It is understood that the existing oil pipeline in Sichuan is the Lan-Cheng-Yu pipeline operated by China National Petroleum Corporation, which was built in September 2002. This is the only oil pipeline in China that leads to the southwest region. The total length of this pipeline is 1,250 kilometers, and its annual oil transport capacity is around 6 million tons. More than 75% of the refined oil supplied to the Sichuan-Chongqing region comes through this pipeline. Since its completion, the pipeline has been operating under overload conditions. With the construction of the Lancheng pipeline, Sichuan’s capacity to supply refined oil will **be enhanced**, which is expected to resolve the province’s energy security issues once and for all.

The Lanzhou-Chengdu refined oil pipeline is China’s first large-diameter, high-pressure, long-distance pipeline for transporting refined oil. Construction began in December 1998, and it came online in September 2002. It is regarded as the \"energy artery\" of the northwest and southwest regions, and it is also one of the ten key projects under the Western Development Initiative. The Lanzhou-Chongqing refined oil pipeline starts in Lanzhou and ends in Chongqing, with a total length of 1,250 kilometers. Its actual annual transport capacity increased from 5 million tons before 2012 to over 6 million tons, then to 7 million tons; by 2018, the actual annual transport volume reached 7.345 million tons. At 10:20 on September 10, 2019, monitoring data from the Chengdu control center of China National Petroleum Corporation’s Southwest Pipeline Company showed that the Lanchengyu refined oil pipeline, which passes through 40 counties, cities and districts in Gansu, Shaanxi, Sichuan and Chongqing provinces and municipalities, had delivered a total of 100 million tons of refined oil to the northwestern and southwestern regions along its route over the course of 17 years of operation.

The longest oil pipeline in China, the \"Lanzhou-Chengdu-Chongqing\" pipeline, is the country’s first long-distance pipeline for transporting refined oil, and it is **one of the ten key projects under the strategy for the development of the western region**. Construction began on December 18, 1998, was completed on June 30, 2002, and went into operation on September 29. The total investment in this project is 4 billion yuan, with the pipeline’s total length approaching 1,250 kilometers. It passes through 40 counties, cities, and districts in four provinces and municipalities, namely Gansu, Shaanxi, Sichuan, and Chongqing. Along its route, there are 3 transfer pumps, 10 transfer stations, and 1 separate pigging station. In total, there are 18 oil depots along the pipeline, with a combined storage capacity of 792,000 cubic meters. The Lancheng-Chongqing pipeline is a refined oil pipeline featuring large diameter, long length, high pressure, large elevation difference, a high degree of automation, and sequential closed transportation of multiple media. The diameter of the pipeline from Lanzhou to Jiangyou is 508, that from Jiangyou to Chengdu is 457, and that from Chengdu to Chongqing is 323.9. This pipeline is the one with the highest level of technological sophistication in China. It features a computer-based data acquisition and control system throughout its length, allowing for online monitoring of the oil transport process via the Global Positioning System (GPS). For the first time in China, ultrasound and fluorescent agents are used to determine the interface between different oil products; this enables sequential transportation of various petroleum products such as gasoline, diesel, and kerosene within the same pipeline, with an annual transport capacity of over 5 million tons. The terrain along the Lancheng-Chongqing oil pipeline project is complex and varied, passing through various geological regions such as the Loess Plateau, the Qinling-Bashan Mountains, the Chengdu Plain, and the Sichuan-Chongqing hills. In most areas, the geological conditions and transportation infrastructure are poor, making construction extremely difficult. The Pipeline Bureau has fully played its role as the main force in pipeline construction, demonstrating a spirit of initiative and determination to overcome challenges. Through careful organization and meticulous management, as well as the establishment of an effective quality assurance system and the use of advanced construction techniques and methods, it has ensured high quality in project construction. The first-pass success rate for pipeline welding was 97.55%, the first-pass success rate for anti-corrosion repairs was 99%, and the quality rating for individual projects was 95.3%. These key quality indicators are at the advanced level for domestic long-distance pipeline construction, and the goal of zero environmental incidents has been achieved. It passed the **-level completion acceptance on April 8, 2005. At 9:00 on December 20, 2007, the dispatching staff at the Beijing Oil and Gas Regulation Center logged into the SCADA system of the Lanchengyu Expressway Oil Pipeline to carry out monitoring tasks. Meanwhile, the dispatching staff at the Chengdu branch of the pipeline company withdrew their access rights to the control system, marking the successful completion of the handover process for the operation and dispatching of the Lanchengyu Expressway Oil Pipeline. The Lancheng-Chongqing refined oil pipeline is the third refined oil pipeline to come under control following the centralized dispatch and management by the Beijing Control Center of the Gangzao Line and the Western Refined Oil Pipeline. Thus, all three refined oil pipelines under the jurisdiction of CNPC are now under centralized control at the Beijing Oil and Gas Control Center. To ensure the smooth handover of the Lanzhou-Chengdu refined oil pipeline as well as its safe and stable operation after the handover, the Beijing Oil and Gas Regulation Center held the \"2007 Coordination Meeting on the Operation of China National Petroleum Corporation’s Crude Oil and Refined Oil Pipelines\" from November 14th to 16th, during which matters related to the transfer of regulatory responsibilities were discussed. On December 12, Ma Zhixiang, director of the Beijing Oil and Gas Regulation Center, made a special trip to the Lanzhou-Chengdu-Chongqing pipeline to conduct an inspection and put forward specific requirements regarding the handover of regulatory responsibilities. The Lanzhou-Chengdu pipeline runs along a terrain with continuous zigzagging undulations, featuring a maximum elevation difference of 2270m, making it a typical pipeline with large elevation gradients. There are no precedents internationally for the tracking and control techniques of oil interfaces in areas with large elevation differences, which imposes extremely stringent technical requirements on the stable operation and automatic control of pipelines ； There are numerous distribution points along the pipeline, and the oil demand at each of these points varies greatly, which complicates the transportation process for the entire pipeline system. In light of this, the control center made thorough preparations in terms of system documents and other related materials. It organized the compilation and issuance of documents such as the \"Oil and Gas Transportation Management Procedure Documents (Petroleum Products Volume)\\", the \"Lanzhou-Chengdu-Chongqing Petroleum Products Pipeline Operation Procedures\", and the \"Lanzhou-Chengdu-Chongqing Petroleum Products Pipeline Handover Plan\", thereby standardizing and regulating the daily operations of dispatching.

The largest-scale re-routing of the Lanzhou-Chengdu-Chongqing crude oil pipeline has been completed. The largest-scale re-routing of the Lanzhou-Chengdu-Chongqing crude oil pipeline has been completed. Date: 2010/10/25. Source: China Petroleum Network. (Reporters: Su Zikai; Correspondents: Rong Bo, Lu Denian) On October 19, the most extensive re-routing work on this pipeline to date was completed in the Longxi area of Gansu Province. 　　To support and adapt to the rapid economic development in the Longxi area, Southwest Pipeline Company has adjusted the pipelines that originally ran through the city, steering them away from the core area designated for the planning and development of Longxi County in order to eliminate potential risks. 　　The total length of the revised route is 14 kilometers, and an additional 2 kilometers will be added to it to create a curved bypass route. Within the management area of the Longxi oil transfer station on the Lanzhou-Chengdu-Pecheng oil pipeline, a total of 4 hot work sites are operating simultaneously. This is the first time since the launch of the Lanzhou-Chengdu-Chongqing pipeline that four Class 1 hot work tasks have been completed simultaneously within a limited time frame. 　　With the rapid economic development of Gansu Province, many areas have encountered the problem of overlapping construction projects and pipeline networks, creating potential hazards due to encroachment. In 2014, to support Lanzhou in alleviating the pressure on its urban transportation system by expanding Nanshan Road in Xigu District, Southwest Pipeline Company re-routed three long-distance pipelines – the Lanzhou-Chengdu-Chongqing pipeline, the Lanzhou-Zhengzhou-Changsha pipeline, and the Lanzhou-Chengdu pipeline – thus becoming a typical example of a company working together with ** to address potential risks associated with pipelines. This rerouting in the Longxi section further improved the cooperation model between the two parties, optimized the joint collaboration plan on the existing basis, and coordinated various resources to ensure the successful completion of the rerouting project. It is reported that the entire project was funded jointly by China National Petroleum Corporation and Gansu Province **. 　　Since its establishment, Southwest Pipeline Company has been striving to develop efficient cooperation models with local authorities in response to the unique geographical conditions of the southwestern region and the rapid development of urban areas. Given the fact that pipelines are distributed across many locations over a large area, the company has established \"direct communication channels\" between various levels of management and local authorities, enabling issues to be reported promptly and followed up on to ensure they are resolved. 　　Since its completion and commissioning in 2002, the Lanzhou-Chengdu refined oil pipeline has been in operation for 14 years; with the development of urban construction, problems related to space occupation have arisen frequently. As of October 23, all follow-up work related to the route modification, such as site restoration and pipeline grouting, has been completed.