Onsite Nitrogen Generators
Nitrogen Blanketing Systems play a critical role in protecting stored materials, maintaining product quality, and supporting safe industrial operations. Across industries ranging from chemical manufacturing to food processing, these systems use nitrogen gas to control oxygen levels inside storage tanks, vessels, and other enclosed equipment, helping prevent oxidation, reduce contamination, and create a more controlled environment.
When certain materials come into contact with oxygen, they can oxidize, deteriorate, or create potentially hazardous conditions. Nitrogen blanketing helps address these concerns by introducing nitrogen gas into the space above a stored product, reducing its exposure to oxygen and creating a more controlled environment.
For businesses that require a continuous nitrogen supply, an on-site nitrogen generator can provide a dependable alternative to traditional gas deliveries. By producing nitrogen directly at the facility, companies can maintain their blanketing operations while gaining greater control over gas availability and operating costs.
At On Site Gas Systems, we design nitrogen generation systems for industrial applications that require reliable, on-demand nitrogen gas. Here are some of the most common applications for nitrogen blanketing systems and how on-site nitrogen generation supports these operations.
Nitrogen blanketing, sometimes called tank padding or tank blanketing, is the process of introducing nitrogen gas into the empty space above a liquid or material stored inside a tank or vessel.
This space, commonly referred to as the headspace or vapor space, can contain oxygen that reacts with the stored material or contributes to an unwanted atmosphere. Introducing nitrogen reduces the oxygen concentration and helps establish an inert environment.
Nitrogen is particularly useful for this purpose because it is relatively nonreactive under typical industrial conditions and is readily available through on-site gas generation.
Depending on the application, nitrogen blanketing can help:
Nitrogen blanketing systems are used in both large industrial storage tanks and smaller process vessels. The appropriate nitrogen supply, purity, pressure, and control method depend on the material being stored and the conditions inside the equipment.
For more information about the process, visit our guide to nitrogen tank blanketing.
Chemical processing is one of the most common applications for nitrogen blanketing systems.
Many chemicals can react with oxygen, absorb moisture, or change composition when exposed to the atmosphere. In some cases, oxygen in the headspace of a storage tank can also contribute to a potentially hazardous flammable environment.
Nitrogen blanketing helps chemical manufacturers control these conditions by replacing oxygen-containing air in the vapor space with nitrogen gas.
Common applications include:
For example, a chemical manufacturer storing an oxygen-sensitive liquid may introduce nitrogen into the tank headspace as the liquid is withdrawn. This helps prevent air from entering the vessel and exposing the remaining material to oxygen.
Nitrogen can also be used during product transfers to purge lines and equipment before introducing sensitive chemicals.
Facilities with continuous chemical processing operations often require nitrogen throughout the day. An on-site nitrogen generation system can provide a steady gas supply without relying entirely on scheduled deliveries.
Learn more about nitrogen generation for chemical blanketing.
The oil and gas industry relies on nitrogen blanketing to support the storage and handling of fuels, hydrocarbons, and other petroleum products.
Many of these materials are flammable, making oxygen control an important consideration in tank storage and processing operations.
Nitrogen is introduced into the headspace of storage tanks to reduce oxygen concentrations and help establish conditions that limit the potential for combustion. The required nitrogen concentration depends on the specific material, operating conditions, and applicable safety requirements.
Typical applications include:
Nitrogen blanketing can also help reduce oxidation and protect certain stored materials from deterioration.
In refinery environments, nitrogen is frequently used alongside other inerting and purging procedures to support controlled operating conditions. The appropriate system must be engineered around the facility’s operating pressure, nitrogen demand, and process safety requirements.
For facilities with substantial or remote nitrogen requirements, on-site generation can help reduce dependence on external gas deliveries.
Explore our nitrogen generation systems for oil, gas, mining, and refineries.
Pharmaceutical manufacturers must maintain controlled conditions throughout production, processing, and storage.
Exposure to oxygen can affect certain active pharmaceutical ingredients, solvents, and other sensitive materials. Nitrogen blanketing helps minimize these interactions by creating an atmosphere with a reduced oxygen concentration.
Common pharmaceutical applications include:
For example, a manufacturer handling an oxygen-sensitive pharmaceutical ingredient may use nitrogen to protect the material while it is stored between production stages.
Nitrogen can also be used to purge process equipment before introducing certain materials, helping establish the required atmosphere.
Purity requirements vary depending on the application, product, and facility specifications. Pharmaceutical operations may require additional gas quality controls, monitoring, and validation procedures to ensure the nitrogen supply is appropriate for its intended use.
An on-site PSA nitrogen generator can be configured to meet defined purity and flow requirements, helping pharmaceutical facilities maintain a consistent nitrogen supply.
Nitrogen blanketing is widely used in food and beverage manufacturing to help preserve product quality and reduce oxidation.
Many food products contain fats, oils, or other ingredients that can deteriorate when exposed to oxygen. Introducing nitrogen into storage tanks and processing vessels helps reduce this exposure.
Nitrogen blanketing is particularly useful for:
In winemaking, for example, nitrogen gas can be introduced into partially filled tanks to reduce oxygen exposure above the wine. This helps limit oxidation that could otherwise affect flavor, aroma, and overall product quality.
Similarly, beverage manufacturers can use nitrogen to protect oxygen-sensitive ingredients during storage and processing.
Nitrogen is also used in food packaging applications. Although packaging and tank blanketing are different processes, both rely on nitrogen’s ability to reduce oxygen exposure.
For food producers with continuous packaging or processing requirements, on-site nitrogen generation can provide a reliable supply of gas.
Learn more about nitrogen applications in food packaging.
Petrochemical facilities use nitrogen blanketing to protect raw materials, intermediates, and finished products throughout manufacturing and storage.
Certain chemicals used in polymer and resin production can react with oxygen or undergo unwanted changes when exposed to uncontrolled atmospheric conditions.
Nitrogen blanketing helps reduce oxygen exposure and supports a more stable environment inside tanks and vessels.
Common applications include:
In some polymer manufacturing processes, oxygen exposure can contribute to unwanted reactions or affect the characteristics of the final material.
Nitrogen helps limit these risks when used as part of a properly engineered process.
The required nitrogen purity and flow rate depend on the chemicals involved, the vessel size, and the process conditions. Facilities with several storage tanks may also need to account for simultaneous nitrogen demand across multiple operations.
An on-site nitrogen generator can be designed to accommodate these requirements while providing a dependable gas supply.
Manufacturers of paints, coatings, adhesives, and specialty chemicals often handle materials that can be affected by oxygen exposure.
Depending on the formulation, contact with oxygen may contribute to oxidation, premature curing, or changes in product performance.
Nitrogen blanketing can help protect stored materials by reducing the amount of oxygen in the headspace above the product.
Typical applications include:
For instance, certain adhesive formulations can begin reacting or curing prematurely when exposed to unwanted conditions. A nitrogen-rich environment can help maintain the intended storage conditions until the material is ready for use.
Nitrogen is also used in certain adhesive curing processes where oxygen control is important.
In these applications, the nitrogen system must be designed around the specific material, temperature, flow requirements, and process conditions.
Learn more about nitrogen blanketing for adhesive curing.
Marine facilities and ships often store fuels, chemicals, and other materials that require controlled atmospheres.
Nitrogen blanketing can help protect these materials while reducing oxygen concentrations in enclosed tanks and vessels.
Common applications include:
On chemical tankers, nitrogen can be used to maintain an inert atmosphere in cargo tanks when required by the cargo and vessel operating procedures.
The nitrogen supply must be capable of meeting the vessel’s operating requirements, including flow, pressure, purity, and available installation space.
On-site nitrogen generation can be particularly useful in marine environments where regular gas deliveries may be difficult or expensive.
Depending on the vessel and application, systems can be designed as stationary installations or integrated into suitable containerized configurations.
Certain transformers and electrical equipment use insulating oils that must be protected from exposure to oxygen and moisture.
As insulating oil ages, oxidation and contamination can contribute to changes in its electrical and chemical properties.
Nitrogen blanketing is used in some transformer designs to maintain a controlled atmosphere above the insulating oil.
By reducing contact between the oil and ambient air, nitrogen can help limit oxidation and moisture exposure.
Applications can include:
The exact nitrogen requirements depend on the transformer design and the manufacturer’s specifications. Not all transformers use nitrogen blanketing, and the system must be appropriate for the equipment’s intended operating conditions.
For facilities managing multiple transformers or oil storage systems, on-site nitrogen generation may provide a convenient source of nitrogen gas for maintenance and ongoing operations.
Although nitrogen blanketing systems vary by application, most follow the same basic principle: introduce nitrogen gas into an enclosed space to reduce oxygen concentration and maintain the required conditions.
A typical system includes a nitrogen supply, a pressure or flow control arrangement, and suitable monitoring and safety equipment.
The process generally involves the following steps:
Nitrogen blanketing can use several control methods, including continuous purge, pressure control, and concentration control.
Continuous purging provides a steady flow of nitrogen but may consume more gas. Pressure-controlled systems introduce nitrogen as tank pressure decreases, while concentration-controlled systems use oxygen monitoring and feedback to regulate nitrogen delivery.
The appropriate approach depends on the application, operating conditions, and required level of control.
It is important to note that nitrogen reduces oxygen availability but does not eliminate every possible fire or explosion hazard. Proper engineering, hazard analysis, monitoring, and safety procedures remain essential. Nitrogen can also create an oxygen-deficient atmosphere that is dangerous to personnel, so suitable ventilation and oxygen monitoring are important wherever exposure is possible.
Businesses that use nitrogen blanketing regularly need a reliable supply of nitrogen gas. Traditionally, this has meant purchasing gas cylinders or arranging bulk nitrogen deliveries.
While delivered nitrogen can work well for intermittent applications, facilities with continuous or high-volume demand may benefit from producing nitrogen on-site.
An on-site nitrogen generator separates nitrogen from compressed atmospheric air and supplies nitrogen gas directly to the facility.
Depending on the application, the benefits can include:
For facilities with consistent nitrogen consumption, these advantages can make on-site generation an attractive long-term option.
Not every nitrogen blanketing application requires the same generator. The correct system depends on several factors, including the stored material, required oxygen concentration, tank volume, operating pressure, and expected nitrogen consumption.
Two common technologies used for on-site nitrogen generation are Pressure Swing Adsorption (PSA) and membrane separation.
PSA nitrogen generators use carbon molecular sieve technology to separate nitrogen from compressed air.
They are particularly suitable for applications requiring high nitrogen purity and consistent gas production.
PSA systems can be engineered for demanding industrial applications, including pharmaceutical manufacturing, chemical processing, and other operations with specific purity requirements.
Membrane nitrogen generators use specialized membranes to separate nitrogen from compressed air.
They are often suitable for applications requiring moderate nitrogen purity, including certain oil and gas, marine, and industrial blanketing operations.
Membrane systems can offer a compact design and relatively straightforward operation, making them useful for installations where space and maintenance requirements are important considerations.
The best technology depends on the nitrogen purity and flow requirements of the application rather than the industry alone.
Nitrogen blanketing is an important process across chemical manufacturing, oil and gas, pharmaceuticals, food and beverage production, marine operations, and many other industries.
By reducing oxygen exposure, nitrogen gas can help protect stored materials, maintain product quality, and support safer operating conditions when incorporated into a properly designed system.
For companies with regular nitrogen demand, an on-site nitrogen generator offers a practical way to produce gas directly at the facility. With the right system, businesses can gain greater control over their nitrogen supply while reducing dependence on external deliveries.
On Site Gas Systems designs and manufactures PSA and membrane nitrogen generation systems for a wide range of industrial applications. Our engineered solutions can be configured around your required nitrogen purity, flow rate, pressure, and operating conditions.
Whether you need nitrogen for chemical storage, refinery tank blanketing, pharmaceutical manufacturing, or another industrial process, our team can help you identify a system suited to your operation.
Contact On Site Gas Systems today to discuss your nitrogen blanketing application and find the right on-site nitrogen generation solution for your facility.
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