How to Store Propane Tanks

Propane tanks must be stored upright and positioned outdoors in well-ventilated areas. You must also keep tanks at the right temperature and at least 10 feet from buildings or ignition sources.

In this guide, we’ll explore the specific requirements for outdoor tank storage. You’ll also learn about:

• Proper positioning techniques
• Temperature management
• Regulatory compliance standards for industrial gas users

How to Store Propane Tanks Outside Safely

Outdoor storage is the only acceptable method for propane tank storage in most situations. Propane tanks must always be stored in well-ventilated areas to prevent gas accumulation that could lead to combustion.

The ideal outdoor location requires a flat, stable surface that ensures the tank remains upright and secure, such as:

• Concrete
• Gravel
• Metal

Concrete pads are particularly effective because they provide excellent stability and prevent moisture contact that can cause corrosion.

Direct sunlight exposure should be avoided because temperatures above 120°F can trigger pressure relief valve activation. This is especially important during California’s hot summers, as ambient temperatures can easily exceed safe storage limits.

Tanks should also be positioned away from high-traffic areas and building openings. The National Fire Protection Association (NFPA) 58 requires specific minimum distances based on tank size:

*Distance varies by specific capacity and type of opening. Consult NFPA 58 or local authorities for exact requirements.

Winter storage comes with fewer temperature concerns because propane tanks can withstand freezing temperatures without damage. However, tanks should still be placed on elevated surfaces to avoid moisture-induced corrosion from ground contact.

Proper Tank Positioning and Orientation Requirements

Propane tanks must stay upright to ensure pressure relief valves function correctly during emergency situations. The position allows the relief valve to communicate with the vapor space instead of liquid propane, which is crucial for safe operation.

Horizontal storage is only permissible for specialized forklift cylinders. Even then, the relief valve must align with the vapor space at the 12 o’clock position. Misalignment can cause liquid propane discharge during valve activation, which significantly escalates fire hazards.

To prevent tipping or rolling, secure all tanks using:

• Chains
• Brackets
• Three-point contact methods 

This is especially important in areas with seismic activity like California, where ground movement could destabilize improperly secured tanks.

For industrial applications, cylinder storage cages or cabinets are mandatory and must feature non-combustible materials with proper hazard signage. These storage systems should be positioned at least 10 feet away from ignition sources and flammable materials.

OSHA permits limited indoor storage in industrial settings only if cylinders are secured in designated rooms with fire-resistant barriers and maintained at least 20 feet from combustible materials. Still, storing tanks in basements, attics, or vehicles is strictly prohibited due to inadequate ventilation and explosion risks.

Temperature Control and Environmental Management

Propane tanks operate safely within a wide temperature range of -40°F to 120°F, but maintaining optimal conditions requires careful environmental management. Prolonged exposure to extreme temperatures can compromise structural integrity and trigger safety mechanisms.

For reference, 120°F is roughly the temperature of water that would cause second-degree burns on contact – hot enough to be immediately dangerous.

During summer months, tanks should be stored in shaded areas or under covers that allow adequate ventilation. NFPA 58 generally requires propane tanks to be installed away from building overhangs and similar structures to ensure proper ventilation and safety valve functionality. When storage under such structures is permitted, adequate ventilation must be maintained according to local fire codes.

Never place propane tanks near heat sources such as:

• Grills
• Generators
• Electrical panels
• HVAC equipment

The radiant heat from these sources can elevate tank temperatures beyond safe operating limits even in moderate ambient conditions.

Regulatory Compliance and Safety Standards

Adherence to NFPA 58 and OSHA standards is mandatory for all commercial and industrial propane storage applications. These regulations specify precise distance requirements based on tank capacity and usage.

In California, local fire departments often impose additional requirements beyond federal standards. These may include special permits for large installations and enhanced inspection schedules for high-capacity storage systems.

Violations of storage codes can cause significant liability exposure, especially in case of accidents. Proper documentation of compliance measures and regular inspection records are essential for both safety and legal protection.

Regular cylinder requalification every 5-10 years is required to check for:

• Dents
• Corrosion
• Valve defects

Visual inspections before each refilling can identify potential issues early, with defective tanks requiring professional disposal through authorized recycling facilities.

Store Your Propane Carefully for Safe Use

Safe propane storage requires strict adherence to:

• Outdoor placement
• Proper positioning
• Temperature management
• Regulatory compliance standards

These practices protect both personnel and property while ensuring reliable access to propane for industrial applications. As regulations continue to evolve, staying current with NFPA and OSHA updates will remain essential for safe storage operations.

Lawrence Haynes

Currently serving as Marketing Director at WestAir Gases & Equipment in San Diego, CA Lawrence leverages his expertise in industrial gas solutions and equipment marketing. With a proven track record in cross-industry marketing strategy, he brings a specialized experience in content development, marketing automation, and partner relations to the industrial gas sector.