Choosing LNG and CNG refueling equipment starts with matching the fuel system to the vehicles, expected throughput, site conditions, and applicable local codes. LNG stations store and dispense natural gas as a cryogenic liquid, while CNG stations compress and dispense it as a high-pressure gas. LNG is typically stored near -162°C, and many CNG vehicle-fueling applications use pressures around 200–250 bar; actual design values must follow the vehicle requirements and local regulations. This guide explains the main equipment, project requirements, and supplier questions to help you prepare a practical request for quotation.
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We prepared this guide for fleet operators, energy companies, engineering contractors, and distributors planning a new natural gas fueling station or upgrading an existing one. It is also useful if you are comparing equipment suppliers and need to clarify what information they require before recommending a configuration. Because station design depends on local regulations, operating patterns, and fuel supply, the guidance below is a planning framework rather than a substitute for site-specific engineering.
An LNG station receives and stores liquefied natural gas in insulated cryogenic tanks, then transfers it to a vehicle through a dispensing system. Typical equipment may include storage tanks, unloading connections, pumps or pressurization equipment, piping, valves, dispensers, and safety and control systems. The exact arrangement depends on delivery method, station capacity, vehicle type, and whether the station serves LNG vehicles only or also supplies CNG.
LNG remains at a very low temperature during storage and transfer, so equipment must be suitable for cryogenic service. LNG also expands significantly as it warms and becomes gas: a commonly cited approximate expansion is around 600 volumes of gas for one volume of liquid, with the exact ratio depending on gas composition and reference conditions. This makes suitable pressure management, ventilation, gas detection, and emergency planning important parts of station design.
A CNG station takes natural gas from a pipeline or another approved supply, compresses it, stores it as required, and dispenses it to vehicles. Common system components include gas filtration and drying equipment, compressors, high-pressure storage, priority or sequencing panels, dispensers, and control and safety devices. Station design must account for the available inlet pressure, required vehicle-fueling pressure, daily demand, and the time pattern of vehicle arrivals.
Some projects combine LNG storage with equipment that converts LNG to gas and compresses it for CNG dispensing. This can serve fleets that use different vehicle types, but it adds interfaces and design considerations. We recommend assessing the fuel supply, vehicle mix, operating schedule, and maintenance resources before deciding whether a combined configuration is justified.
| Station application | Equipment considerations | Questions to resolve |
|---|---|---|
| LNG fleet fueling | Cryogenic storage, transfer equipment, LNG dispensers, safety and control systems | How will LNG be delivered, and how many vehicles will refuel per day? |
| CNG fleet or public fueling | Gas conditioning, compressors, storage, dispensers, and pressure controls | What are the inlet conditions, target pressure, peak demand, and vehicle schedule? |
| Combined LNG and CNG service | Separate fuel paths plus any required LNG vaporization and gas compression equipment | Are both fuel types required from the first phase, and can the site support the added systems? |
Use the table as an early planning aid, not a final equipment specification. Throughput should be stated in a consistent unit, such as kilograms per day for LNG or standard cubic meters per hour for CNG, with the reference conditions defined for gas-flow figures. Clarify whether the stated demand represents average consumption, peak demand, or a future expansion target.
Start by documenting the site boundary, access for fuel delivery vehicles, available space, ground conditions, drainage, and nearby buildings or activities. Confirm the natural gas source and its pressure, quality, and expected availability for CNG projects, or the LNG delivery and unloading arrangement for LNG projects. Also record the available electrical supply, water or cooling needs if applicable, communications, and any restrictions on construction or operation.
Safety distances, hazardous-area classification, fire protection, pressure-system design, and environmental requirements vary by jurisdiction and station configuration. We recommend having the project team verify these requirements with the local authority and qualified engineering professionals before fixing the layout. A supplier can provide equipment information for design coordination, but local approval and site engineering remain essential.
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Estimate daily fuel consumption and identify the busiest refueling periods. A station serving vehicles in a short overnight window may need a different compressor and storage strategy from one where vehicles arrive throughout the day. Share fleet size, tank or vehicle requirements, operating hours, expected growth, and the consequences of downtime with potential suppliers.
For CNG, compressor capacity and storage arrangement influence how the station responds to simultaneous demand and peak periods. For LNG, tank working capacity, delivery frequency, transfer rate, and operating conditions are key planning inputs. Avoid selecting equipment based only on a single maximum-capacity figure; request the assumptions behind performance and confirm whether they reflect your actual operating conditions.
When comparing quotations, make sure suppliers are using the same capacity basis, scope boundary, and project assumptions. Ask which items are included or excluded, such as unloading equipment, foundations, electrical work, piping beyond the package boundary, and site installation. This makes technical and commercial comparisons more meaningful and reduces the risk of discovering interface gaps late in the project.
There is no single reliable price or delivery schedule for LNG and CNG station equipment without a defined scope. Cost can depend on capacity, storage volume, pressure rating, automation, materials, configuration, certifications or approvals required for the destination market, and the division of work between supplier and contractor. Shipping method, destination, and installation arrangements can also affect the total project budget.
For an accurate quotation, provide the target capacity and operating profile, site location, fuel source details, utility information, preferred scope, and required delivery window. Ask whether the supplier has a minimum order quantity for individual components or package configurations, and request a written schedule that identifies design approval, manufacturing, inspection, and dispatch milestones. Treat preliminary prices and schedules as provisional until technical requirements and commercial terms are confirmed.
At Dongzhao, we work with buyers to clarify application requirements and discuss suitable LNG and CNG refueling equipment configurations. We can review the information provided for a project and identify technical questions that should be resolved before quotation or equipment ordering. Final selection should be coordinated with the project engineer and relevant local authorities to confirm site suitability and compliance.
The right LNG and CNG refueling equipment is the configuration that fits your vehicles, fuel supply, throughput, site, and local requirements—not simply the package with the largest capacity or lowest initial price. Begin by documenting your demand, site conditions, utilities, and project scope, then use those details to compare supplier proposals on equal terms. This gives your team a clearer basis for evaluating technical suitability, total project responsibilities, and long-term support.
To discuss an LNG or CNG station project with Dongzhao, prepare your target fuel type, capacity, location, vehicle profile, and preferred delivery timeline. We can use those details to start a focused equipment discussion and identify the information needed for a project-specific quotation.
Are you interested in learning more about LNG and CNG refueling equipment? Contact us today to secure an expert consultation!