Posted by Vidisco, October 24, 2023

Vidisco on the Project of Natural Gas Transmission from West to East China

The ambitious project of Natural Gas Transmission from West to East

China represents a monumental infrastructure undertaking that spans
multiple provinces and regions of China. This vast network comprises
several main lines and branch connections, totaling thousands of
kilometers in length. Its goal is to facilitate the efficient and safe transport
of natural gas, supporting the energy needs of a rapidly growing nation.

1 Background:

The network main line of this project

The West Line: It starts from Lunnan, Xinjiang, and passes through 66 counties in 9 provinces (autonomous regions and municipalities), including Xinjiang, Gansu, Ningxia, Shaanxi, Shanxi, Henan, Anhui, Jiangsu, and Shanghai, with a total length of about 4,000 kilometers.

West Second Line: The project is 1 branch and 1 branch, with a total length of 4,661 km. The main line is 4,595 km, about 3,000 km parallel with the West Second Line. The branch line is Jingmen-Duan Yunying, with a length of 66 kilometers; The designed gas transmission capacity of the main line is 30 cubic kilometers/year, the pressure is 10~12 Mpa, and the pipe diameter is 1.219 meters, which is the same as the comprehensive parameters of the west-east gas transmission line.

West Line 3: The main line starts from the first station in Horgos, Xinjiang in the west and reaches the last station in Shaoguan, Guangdong in the east. From Horguos-Xi’an section, it runs eastward along the second-line route of the West-to-East Natural Gas Pipeline, passing through Xinjiang, Gansu, Ningxia, Shaanxi, Henan, Hubei, Hunan and Guangdong, a total of 8 provinces and autonomous regions.

According to the plan, in 2014, all the lines of the West Third Line are ventilated. At that time, it will be connected with the main pipeline networks such as the West First Line, the West Second Line, the Shaanxi-Beijing First Line and the Sichuan-East Gas Transmission Line, etc., and a natural gas base pipeline network that runs from east to west and from north to south will be formed.

Branch connection network

From 2009 to 2015, the state plans to build about 8,000 kilometers of branch pipelines in key target markets in Central China, Southeast China, Central China, Pearl River Delta, Yangtze River Delta and Bohai Rim.

In the southeast coastal area, the Second West Line, the Third West Line, the China-Myanmar Pipeline and the Fujian Branch Railway are planned and constructed. In the Yangtze River Delta region, Shanghai branch of the second west line, Jinhua-Lishui-Wenzhou-Taizhou branch line and Rudong-Nantong-Jiangdu pipeline are planned to be constructed. The main gas supply sources are the first west line, the second west line, the Jining line and the Jiangsu LNG.

In the Bohai Rim region, Qinshen Line, Shaanxi-Beijing Line 3, Shandong Pipeline Network and other trunk pipelines are planned to be built, basically realizing the full coverage of prefectural cities, forming a regional pipeline network with flexible transportation, and the main gas supply sources are Shaanxi-Beijing Line 1, Line 2, Line 3 and Tangshan LNG.

In the central and southern region, it is planned to build the Second West Line, the Third West Line, the Shiyan Branch and the Xiangtan Branch to further improve the gas supply pipeline network and expand the market coverage. The main gas sources are the West First Line, the West Second Line, the West Third Line, the Zhongwu Line and the Huaiwu Line.

Natural Gas Transmission - Vidisco

Facility site


Vidisco provides innovative portable X-ray solutions for safe and accurate detection in demanding Security and Non-Destructive Testing (NDT) applications. Founded in 1988, Vidisco pioneered the digital X-ray industry and today, continues to lead in developing, manufacturing and supporting a wide array of solutions. Thousands of Vidisco systems are deployed by top military, security and industrial organizations in 75 countries worldwide. They deliver fast, high-quality imaging in the most challenging environments.

The system used in this project

2  Inspection introduction:

Steep pipe: Ф914*28mm, Specification complied with: SY/T 4109, and NB/T 47013.11,ISO 17676.2

Date: May 28th 2021

Panel:  VIDISCO’s VIDI 12

Source:  Comet PXS EVO 300D

Software:  VIDISCO VEO NDT Pro

Weld No. :  XQDS-YC-03

Exposure:  290KV, 3mA, 90s, SDD=1000mm


3 X-ray Images captured as below,

X-ray Image 1

X-ray Image

X-ray Image

X-ray Image

X-ray Image

X-ray Image

X-ray Image

X-ray Image

X-ray Image

X-ray Image

X-ray Image

4 The advantages of DR technology VS film are below

Time expense:

DR Technology Film
Exposure time 1 image 12 images/ 1 weld 1 image 12 images/ 1 weld
90s 1080s= 18min 1 hour 12 hours
Include the assembly time 5min 60min 65min 13 hours
Remarks Instant images At least 30min
Total time for 1 weld 60min=1hour 13 hours


We can conclude that the DR technology saves much time for end user and the service company.

Especially – the onsite inspection, customers don’t want to halt production, and also the pipe with media inside and warm protection outside.

DR technology can inspect without halting production but not film.

What’s more, you can inspect repeatedly without cost, but not film,

You can decide the quality of the images instant but not film.



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