Compressed Natural Gas Plant

The compressed natural gas plant (also known as CNG plant) is a complete set of equipment that integrates natural gas purification, compression, and storage.

 

Its core principle is to first purify raw natural gas to remove harmful impurities, then use multi-stage compressors to increase the pressure to 20-25 MPa, converting it into high-pressure gas that can be stored in cylinders or tanks.

 

It can stably produce high-quality CNG and is one of the mainstream equipment for natural gas utilization in transportation and distributed energy systems.

The working process of a CNG plant can be summarized as five core steps: raw gas pretreatment → compression → dehydration & desulfurization → storage → product output

Today, as the application of clean energy becomes increasingly widespread, refined engineering design is crucial for achieving efficient and safe production of Compressed Natural Gas plants. We have established a professional engineering team with over 25 years of technical accumulation in the field of natural gas compression, fully mastering important domestic and international standards and specifications such as ISO, API,ASME, and EN. Based on the raw gas characteristics (including methane ratio and impurity composition) and application environments (e.g., vehicle refueling or industrial gas supply) of different projects, we provide personalized design solutions. We focus on optimizing compressor stage configuration, intercooler efficiency, and purification system coordination, which can reduce energy consumption by 5%-8% compared with conventional schemes. We always adhere to the concept of customization to ensure each plant accurately matches its unique operating requirements.

Throughout the complete project cycle from planning to commissioning, our company fully implements the standards of the ISO9001 Quality Management System and ISO14001 Environmental Management System. In the process design phase, we use professional software such as Aspen HYSYS for compressor system simulation to ensure the stability of its operating pressure. All key equipment, including compressors, high-pressure valves, and gas storage wells, undergoes inspection by independent third-party institutions to ensure compliance with pressure equipment specification requirements such as ASME BPVC Section VIII. High-pressure pipeline welding operations strictly implement certified process procedures, combined with non-destructive testing methods such as Ultrasonic Testing (UT) and Penetrant Testing (PT), effectively ensuring the sealing reliability of joints. A 72-hour continuous stability test is conducted before project completion to fully verify the device's performance in terms of processing flow, system pressure, and gas purity. This complete set of standardized processes provides a solid guarantee for the reliability of project quality and the timeliness of delivery.

Product quality is the fundamental foundation for ensuring the safe and stable supply of CNG. Each plant implements strict quality control standards: the compressor system is equipped with multiple overload protections and real-time temperature monitoring to ensure continuous and reliable operation; high-pressure gas storage units are manufactured in strict accordance with GB 150 or ASME specifications with a service life of no less than 20 years; the gas purification device ensures the produced CNG fully meets the requirements of national standards such as GB 18047, and the product qualification rate always maintains 100%. The average trouble-free operation time of the entire set of equipment exceeds 8000 hours, providing strong support for long-term efficient operation.

To ensure the continuous and stable supply of CNG, high-quality after-sales service is crucial. After receiving a service request from the user, our technical support team will immediately activate a 24/7 response mechanism and promise to provide an initial reply within 8 hours through phone calls, emails, or on-site surveys. For remotely solvable issues such as pressure adjustment and alarm diagnosis, we guarantee to assist in completing the operation within 24 hours; in case of mechanical failures requiring on-site resolution, engineers can be dispatched to domestic locations within 48 hours and international locations within 72 hours. In addition, we provide planned maintenance services including compressor oil replacement and filter cleaning to effectively extend the service life of the equipment.

Our Compressed Natural Gas Plants have demonstrated excellent reliability and operational efficiency in large-scale industrial applications, and have been recognized by many leading enterprises in the energy and transportation industries, including internationally renowned companies such as PetroChina, Sinopec, Gazprom, and clean energy fuel companies.

In terms of cooperation methods, we not only provide a full-process turnkey delivery solution including design, installation, and commissioning but also offer flexible models such as equipment leasing or gas supply agreements (we are responsible for plant operation and supply CNG to customers) according to customers' actual needs, helping customers choose the most suitable investment plan for their own situations.

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