A CO₂ tank is a pressure vessel designed to store liquefied carbon dioxide under controlled conditions. In industrial environments, correct specification, certification and supply reliability are critical to operational safety and compliance.
Blended Products supplies carbon dioxide across the UK for manufacturing, food production, water treatment, HVAC, welding, laboratory and fire safety sectors. This guide outlines the technical considerations when sourcing a carbon dioxide cylinder or carbon dioxide gas cylinder for business use.
What is a CO₂ tank?
A CO₂ tank is a high-pressure vessel used to store carbon dioxide in liquid form. At ambient temperature, CO2 is stored at approximately 50–60 bar, depending on temperature.
Key characteristics:
· Manufactured from high-strength steel or aluminium
· Designed to EN ISO standards
· Fitted with appropriate valve type (industrial, food grade or dip tube where required)
· Pressure tested and certified under UK and European regulations
The term CO₂ tank is often used interchangeably with carbon dioxide cylinder or carbon dioxide gas cylinder. In industrial supply, the distinction usually relates to capacity and application rather than technical construction.
Carbon dioxide cylinder sizes and configurations
Selecting the correct carbon dioxide cylinder depends on:
· Application
· Required flow rate
· Consumption frequency
· Storage space
· Handling capability
Typical supply formats include:
Standard cylinders
Used for welding, laboratories, beverage dispense and light industrial processes.
Liquid withdrawal cylinders (dip tube)
Designed where liquid CO₂ draw-off is required rather than vapour.
Bundles
Multiple carbon dioxide gas cylinders manifolded together for higher-volume demand.
Bulk and mini-bulk systems
For continuous industrial use where cylinder replacement would be operationally inefficient.
Blended Products advises clients based on consumption profiling to ensure continuity of supply and cost efficiency.
Industrial applications of a CO₂ tank
CO₂ is widely used across UK industry due to its chemical stability and non-flammable properties.
Food and beverage production
· Modified atmosphere packaging (MAP)
· Carbonation
· pH control
Food grade carbon dioxide must comply with relevant food safety standards and traceability requirements.
Welding and fabrication
CO₂ is commonly used as a shielding gas, either pure or blended.
Water treatment
Used for pH correction and alkalinity control.
HVAC and refrigeration
Applied in certain cooling and process systems.
Fire suppression
Carbon dioxide gas cylinders are used in fixed fire protection systems for electrical and plant rooms.
Each application requires correct grade specification and documented certification.
Regulatory and compliance considerations
When sourcing a carbon dioxide cylinder in the UK, compliance is mandatory.
Key requirements include:
· Pressure Equipment Directive (PED) compliance
· UKCA or CE marking as applicable
· Routine inspection and recertification
· Proper labelling and hazard classification
· Transport under ADR regulations
Businesses must also ensure:
· Safe storage in ventilated areas
· Secure upright positioning
· Segregation from incompatible substances
· Appropriate staff training
Blended Products operates within recognised UK industry standards and provides documented certification with supply.
Storage and handling guidance
Carbon dioxide is colourless and odourless. In confined environments it presents an asphyxiation risk due to oxygen displacement.
Best practice includes:
· Store in well-ventilated areas
· Install CO₂ monitoring where large volumes are stored
· Secure cylinders to prevent tipping
· Avoid exposure to excessive heat
· Use appropriate regulators and fittings
Routine inspection of valves, seals and connections is essential.
Why specification matters
Incorrect specification of a CO₂ tank can lead to:
· Inefficient gas usage
· Regulator incompatibility
· Operational downtime
· Safety non-compliance
· Increased cost
Working with an experienced UK supplier ensures the correct carbon dioxide gas cylinder configuration is selected for your operational requirements.
Blended Products provides:
· Nationwide delivery
· Flexible supply volumes
· Technical guidance
· Reliable logistics scheduling
· Consistent quality control
Frequently asked questions
What is the pressure inside a CO₂ tank?
At 20°C, carbon dioxide typically exerts approximately 57 bar inside a sealed cylinder. Pressure increases with temperature.
Is there a difference between a CO₂ tank and a carbon dioxide cylinder?
The terms are often used interchangeably. In industrial contexts, “tank” may refer to larger storage formats, while “cylinder” commonly refers to portable units.
How should a carbon dioxide gas cylinder be stored?
Upright, secured, in a cool and well-ventilated area away from heat sources and incompatible materials.
How do I know what size CO₂ tank I need?
Consumption rate, duty cycle and application determine correct sizing. A usage assessment from your supplier ensures optimal specification.
Does food production require a different CO₂ cylinder?
Yes. Food applications require certified food grade carbon dioxide with full traceability documentation.