【Ten Years of Rapid Development in Chemical Equipment】From 1700 to 2018: The EB80 type compressor units for natural gas transmission pipelines developed by Shaanxi Gas Turbine passed the appraisal

China’s natural gas mainline and branch line projects utilize high-pressure, large-diameter long-distance pipeline systems. Generally, a compression station equipped with multiple high-power compressors is needed every 100 to 200 kilometers; through multi-stage compression by these compressors, the frictional resistance during transmission is overcome, enabling the long-distance transport of natural gas. Therefore, the compression unit is regarded as the “heart” of natural gas long-distance pipelines. As a key core device for compressing and transporting natural gas, natural gas pipeline centrifugal compressor units have relied on imports for a long time due to the high technical requirements involved. In order to break the monopoly held by compressor units used in long-distance pipeline systems and to provide customers with high-quality products and system services, Shaanxi Gas Turbine Power undertook the industrial technology research project in Shaanxi Province titled “Research on Key Technologies for Centrifugal Compressors Used in Natural Gas Long-Distance Pipelines and Product Development”. Leveraging its 50 years of technical expertise and comprehensive capabilities in the field of energy conversion equipment, Shangdu Power conducted thorough research and analysis on pneumatic parameters, structural features, and control technologies based on its experience in operating compressors at various stations along the West-East Gas Pipeline Project. With the goals of high reliability, high efficiency, and complete system integration, it brought together resources from around the world to form a world-class R&D team, which successfully developed a highly efficient model series of compressors specifically designed for pipeline use, achieving a multi-stage efficiency of over 88% ； The specialized pneumatic calculation software developed, along with the high-performance basic series suitable for various natural gas applications, have solved the technical challenges related to the efficient operation of compression units in large long-distance pipelines over a wide range of operating conditions ； A structural design for long-distance pipeline compression units with a new structure has been developed, significantly improving the operational stability of these units ； The newly developed structures, such as one-sided disassembly/montage, one-sided clamping rings, and a crankshaft turning device, significantly reduce the time and costs associated with on-site maintenance, ensuring the stability, reliability, and safety of long-distance pipeline compressors during operation. This project has obtained 11 **patents**, and a highly efficient new type of unit technology with independent intellectual property rights has been developed. To advance the localization of large-scale equipment in China, Shangdu Power began to make strategic investments in clean energy sectors such as oil and gas early on. Through continuous technological development and innovation, it has developed the capability to provide integrated system solutions that encompass equipment, EPC services, operation, and financing. By integrating global resources, it continues to build capabilities for system solutions in the field of distributed energy. At present, Shaanxi Gas Turbine Power has made new breakthroughs in the complete set of technologies and system integration technologies for gas-fired power units, and its technical capabilities in pipeline compressors are now on par with international standards. In 2017, SHANGU Power’s project on \"the research, development of combustion-driven pipeline compressors for natural gas transmission\" passed the **evaluation of scientific and technological achievements. Meanwhile, through continuous market development, Shaanxi Gas Turbine Power has secured over 10 projects involving natural gas long-distance pipeline compressors. It has provided safe, reliable, stable, and technologically advanced compressor units as well as system services for key projects such as those related to the \"West-to-East Gas Transmission\" project, the \"Sea-to-Shore Gas Transport\" project, and the **\"Interconnection\" projects aimed at ensuring supply stability. In this way, it serves as a vital \"heart\" for the supply of key equipment in China’s clean energy sector.

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