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PetroChina holds and operates an oil and gas product pipeline network and storage system covering 26 provinces, municipalities and autonomous regions across China. As the largest storage and transportation service provider of oil and gas pipeline in China, the Company is responsible for transmission and marketing of natural gas as well as transportation and storage of crude oil and oil products. 
  
I. Natural gas pipeline
 
(1) Southwest gas pipeline network

The trunk of southwest gas pipeline network is from south to north and connects with Hunan and Hubei by Zhong-Wu pipeline. The trunk system mainly includes south-north ring trunk, feed gas trunk in the east of SichuanBasin, purified gas trunk and gas trunks in other areas, which is responsible for transmitting more than 80% of feed gas and gas commodities from SichuanBasin, with total length of 5,923km. 
 
 (2) Shaan-Jing gas pipeline  

Shaan-Jing gas pipeline is from Jingbian, Shaanxi to Yamenkou, Beijing, with total length of 910km and annual capacity of 3.3 billion cubic meters. It has supplied natural gas to Beijing since 1997, covering Shanxi, Hebei and Tianjin along the line, and supplying to Cangzhou Fertilizer Plant and Shandong Zibo area through Gang-Cang and Cang-Zi lines respectively. 

The second Shaan-Jing gas pipeline is from Jingbian, Shaanxi to Beijing, with total length of 935km and annual capacity of 12 billion cubic meters, which is connected with the underground gas storage of Dagang Oilfield by Gang-Jing line and Gang-Qing line. 
 
(3) West-East gas pipeline
   
West-East gas pipeline starts from Lunnan, Tarim Basin in Xinjiang, passes through 10 provinces, municipalities and autonomous regions such as Xinjiang and Gansu, ending in Shanghai. The trunk line is 3,836km long with an annual capacity of 12 billion cubic meters, and was put into commercial operation on December 30, 2004. 

In order to guarantee safe and stable operation of West-East gas pipeline, the Company established the supporting facilities such as Ji-Ning, Huai-Wu and Lan-Yin connection lines, as well as underground gas storages in Jintan and Liuzhuang.

Ji-Ning cross line is from Anping substation of the second Shaan-Jing gas pipeline to Qingshan substation of West-East gas pipeline, which is 886km long in trunk and was put into operation in January 2006.Huai-Wu connection line, stretching from Huaiyang substation of West-East gas pipeline to Wuhan substation of Zhong-Wu gas pipeline, is 443km long and was put into operation in December 2006. Lan-Yin gas pipeline starts from Se-Ning-Lan pipeline, passes by West-East gas pipeline and ends in Yinchuan, Ningxia and is 457km long in the trunk and was put into operation in July 2007.At present, the Company is expanding the West-East gas pipeline by reconstructing 10 existing booster stations and building 12 new booster stations, which will increase the annual capacity up to 17 billion cubic meters.  
 
(4) Zhong-Wu gas pipeline  

Zhong-Wu gas pipeline connects the southwest oil and gas field with Hunan and Hubei area. The trunk of the line is from the purification plant in ZhongCounty, Chongqing to Wuhan, Hubei, with a total length of 719 km and a designed annual capacity of 3.0 billion cubic meters.
 
Meanwhile, there are three branches in construction: Zhijiang-Xiangfan branch with a total length of 228km, Wuhan-Huangshi branch with a total length of 78km, and Qianjiang-Xiangtan branch with a total length of 341km.Zhong-Wu gas trunk, Huangshi branch and Xiangfan branch were completed and put into operation in November 2004, supplying to the downstream users in Hubei from the end of 2004.Xiangtan branch was completed and put into operation in June 2005, supplying to the downstream users in Hunan. 
 
(5) Se-Ning-Lan gas pipeline

Se-Ning-Lan Pipeline starts from Sebei Gasfield, Qinghai, passes through XiningCity and ends in Lanzhou, Gansu. Trunk of this line is 931km long with a designed annual capacity of 3.4 billion cubic meters and was put into operation in September 2001.  

II. Crude oil pipelines  

There are mainly Northeast crude oil pipeline and West crude oil pipeline. 

(1) Northeast crude oil pipeline 

Northeast crude oil pipeline is responsible for transporting crude oil from Daqing and Jilin oilfields, and was originally built in 1970. It is 2,400km long with a designed annual capacity of 40 million tons.  

(2) West crude oil pipeline 

Northwest oil pipeline mainly includes Lun-Ku-Shan, Ma-Hui-Ning, Zhong-Yin and A-Du pipelines.Lun-Ku-Shan pipeline starts from LunnanTown, Bazhou in Xinjiang, passes by KorlaCity and ends in the oil export depot of Shanshan; it is responsible for transporting crude oil from Tarim basin of Xinjiang.Lun-Ku line was put into operation in 1992, with a total length of 192km and a designed annual capacity of 3.00 million tons; the second Lun-Ku line was put into operation in 1996, with a total length of 161km and a designed annual capacity of 6.00 million tons.

Ku-Shan line was put into operation in 1997, with a total length of 476 km and a designed annual capacity of 5.00 million tons. 

Ma-Hui-Ning pipeline is responsible to export crude from Changqing Oilfield. It starts from QuziTown, HuanCounty in Gansu, passes through Huianbao, Ningxia and ends in Shikong, ZhongningCounty in Ningxia, with a total length of 270km and a designed annual capacity of 3.00 million tons. Hui-Ning section has a designed annual capacity of 4.80 million tons. 
 
A-Du pipeline is the domestic section of China-Kazakhstan Pipeline from Alashankou, Xinjiang to Dushanzi, Xinjiang. It is 246km long with a designed annual capacity of 10.00 million tons in the first phase, and was put into operation in December 2005.   

West crude oil pipeline is responsible to export crude oil from Xinjiang. The trunk of this line is from Shanshan to Lanzhou, with a total length of 1,562km and a designed annual capacity of 20 million tons. It was put into operation in June 2007.  
 
III. Oil products pipeline  

Main oil products pipelines for PetroChina are Lan-Cheng-Yu and Wu-Lan pipelines. 

Lan-Cheng-Yu oil products pipeline was put into operation in December 2002. It starts from Lanzhou, passes through Gansu, Shaanxi and Sichuan, and ends in Chongqing, with a total length of 1,250km. The designed annual capacity of Lanzhou-Chengdu section and Chengdu-Chongqing section is 5.00 million tons and 2.50 million tons respectively. 

West oil products pipeline is responsible to export oil products from Xinjiang. The trunk of this line is from Urumqi to Lanzhou, with a total length of 1,858km and a designed annual capacity of 10.00 million tons. It was put into operation in June 2006.