To drive greener economic growth and reduce air pollution in industrial areas, China is replacing coal-fired power generation with renewable energy and natural gas. This strategy has led to a significant demand in natural gas which is forecast to grow from around 320 billion cubic meters in 2020 to 500 billion cubic meters in 2025 (Forbes, 2020). This growth will only be feasible through building additional long-distance gas pipelines and growing LNG imports, including associated investments in storage and transmission infrastructure.
In developing this increased transmission capacity, operators are faced with the challenge of balancing costs and efficiency whilst meeting high safety standards.
The use of API X80 high strength steels, with high resistance and toughness have already increased the annual capacity of long-distance gas transmission pipelines in China, whilst maintaining economic viability.
These pipelines have a high gas transmission capacity, using 1,420 mm diameter pipes. Even with the increased volume, the gas can be transported at the Maximum Allowable Operating Pressure (MOAP), ensuring both efficiency and safety. This has been demonstrated in successive new gas transmission pipelines in China, and detailed in the examples below.