On September 29, 2024, the Turpan Hami section of the West East Gas Pipeline 4, which had been under construction for two years, was put into operation before the Gansu and Ningxia sections. Natural gas from Central Asia and the Tarim Oilfield in Xinjiang, China, converged at the Turpan connecting compressor station, was pressurized and sprayed out, rushing eastward.

The West East Gas Pipeline 4 is a key project in the national "14th Five Year Plan" for oil and gas development. The Turpan Zhongwei section is a core component of the West East Gas Pipeline 4, with a total length of 1745 kilometers. It starts from Turpan Liaison Station, passes through Hami, and ends at Zhongwei Liaison Station, passing through 17 counties and cities in Xinjiang, Gansu, and Ningxia provinces.

The Turpan Hami section of the West East Gas Pipeline 4 project is 583 kilometers long, with 4 co built stations and 18 line shut-off valve stations along the route. There are 12 large and medium-sized river crossings, and a total of 15 railway crossings and secondary road crossings. Among them, 123.7 kilometers of pipelines pass through the "hundred mile wind zone", and the construction team completed the welding and trenching tasks of the "hundred mile wind zone" pipelines before the sandstorm arrived, and partially backfilled them, accelerating the project progress.

Ren Tao, the head of the Xinjiang Northwest Project Management Center of the Construction Project Management Branch of the National Petroleum and Natural Gas Pipeline Network Group Co., Ltd., introduced that during the construction of the West East Gas Pipeline 4, the first large-scale use of 18 meter long pipelines was made

The process technology not only reduces welding crossings, but also greatly improves construction efficiency.

A long-distance pipeline is generally 12 meters long, and using an extended pipeline is expected to reduce the number of welds by more than 5000 and the number of circumferential welds by about one-third; The double pipe process technology is to assemble and weld two pipes together at the prefabrication site, and then pull them to the construction section to better ensure welding quality and improve construction efficiency. Keywords: the Belt and Road news, the Belt and Road project, overseas project.

The diameter of the West East Gas Pipeline 4 is 1219 millimeters, with a designed annual gas transmission capacity of 15 billion cubic meters, which can reach 30 billion cubic meters after pressurization. After the full operation of the fourth line of the West East Gas Pipeline (Turpan Zhongwei), it will be interconnected with the first, second, and third lines, promoting the annual transmission capacity of the West East Gas Pipeline system to reach 100 billion cubic meters. This will help alleviate the current bottleneck of natural gas pipeline transportation, expand future coal to gas export routes, and is of great significance for promoting high-quality economic and social development in Xinjiang and ensuring national energy security. (This article is from the official website of Jian Dao: www.seetao.com. Reproduction without permission is prohibited, otherwise it will be prosecuted. Please indicate Jian Dao website+original link when reprinting.) Jian Dao website mechanical column editor/Zhou Yingwen