West-East Gas Pipeline 4

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West-East Gas Pipeline 4 (WEPPIV) 西气东输4线 is an operating gas pipeline in China .

Location

The pipeline runs from Kuqa, Xinjiang to Zhongwei, Ningxia, China. In 2019, the plan of the route changed to Turpan, Xinjiang to Zhongwei, Ningxia, 1595 kilometers shorter than the original plan.

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Project Details

• Owner: National Pipeline Network Group United Pipeline Co., Ltd. 国家管网集团联合管道有限责任公司西部分公司
• Parent Company: National Petroleum and Natural Gas Pipeline Network Group Co., Ltd. (100%) （PipeChina）
• Current Capacity:
• Proposed Capacity: 15 bcm/y
• Length: 3340 kilometers
  • 1745 kilometers (actual length)
• Diameter: 1219 mm
• Status: Construction
  • Operating
• Start Year: 2025

Background

The pipeline is owned and operated by PipeChina (China Oil & Gas Pipeline Network Corporation). It transports natural gas sourced from Turkmenistan, Uzbekistan, and Kazakhstan.

In October 2020, ownership of the pipeline was transferred from PetroChina, a subsidiary of CNPC, to PipeChina.Subsequently, in August 2021, the operating company became the National Pipeline Network Group United Pipeline Co., Ltd. (国家管网集团联合管道有限责任公司西部分公司).

In 2019, the original proposal for the pipeline underwent significant changes, including a shortened route and a shift in gas sources. The revised route runs from Turpan, Xinjiang to Zhongwei, Ningxia, making it 1,595 kilometers shorter than originally planned. Instead of being supplied by the Central Asia–China Gas Pipeline D, the pipeline now sources gas from domestic gas fields in Xinjiang and other West-East Gas Pipelines.

Construction of the West-East Gas Pipeline 4 officially began in September 2022, spanning 1,745 kilometers from Turpan to Zhongwei.

In September 2024, the Xinjiang segment became operational.

In June 2025, the Gansu and Ningxia segments were completed and entered operation, marking the full operation of the entire West-East Gas Pipeline 4.

西气东输四线是继西气东输一线、二线、三线管道之后，连接中亚和中国的又一条能源战略大通道，是推动共建新时代绿色能源丝绸之路的重大举措，对于我国充分利用国际油气资源、实现开放条件下的能源安全，具有重大战略意义。工程起自中吉边境新疆乌恰县伊尔克什坦，经轮南、吐鲁番至宁夏中卫，管道全长约3340公里，管径1219毫米，设计压力12兆帕。项目建成后，将有效增强管网系统供气可靠性和灵活性，提高能源输送抗风险能力，进一步促进东西部地区能源结构优化，助力管道沿线经济社会发展和绿色低碳转型。

根据 2019 年 2 月中国石油天然气股份公司规划计划部组织召开西四线建设方案讨论会议精神，西四线上游资源暂不考虑中亚D 线，项目功能定位由原来承接中亚 D 线进口气调整为解决西部天然气管网吐鲁番后段输送能力瓶颈问题，工程范围由原来的乌恰-中卫调整为吐鲁番-中卫,项目名称调整为西气东输四线天然气管道工程(吐鲁番-中卫)。2019 年国家油气管道体制改革，国家石油天然气管网集团有限公司成立，本项目建设单位变更为国家管网集团西部管道有限责任公司。完成环境影响报告书初稿后，2021 年 7 月-8 月，建设单位开展了该项目环境影响报告书征求意见稿的公示工作，公示载体为新疆信息港、宁夏品牌网、甘肃在线，新疆法制报、宁夏新消息报、甘肃经济日报以及现场张贴。2021 年 8 月，由于资产划拨，西四线资产划归至国家管网集团联合管道有限责任公司西部分公司。

• Owner: National Pipeline Network Group United Pipeline Co., Ltd. 国家管网集团联合管道有限责任公司西部分公司
• Parent Company: National Petroleum and Natural Gas Pipeline Network Group Co., Ltd. (100%) （PipeChina）
• Current Capacity:
• Proposed Capacity: 15 bcm/y
• Length: 3340 kilometers
  • 1745 kilometers (actual length)
• Diameter: 1219 mm
• Status: Construction
  • Operating
• Start Year: 2025