What is UL 58

UL 58, also known as the Standard for Safety for Steel Underground Tanks for Flammable and Combustible Liquids, is a widely recognized standard that sets guidelines and requirements for the design, construction, and maintenance of these types of tanks. This technical article aims to provide an in-depth understanding of UL 58 and its significance in ensuring the safe storage and transportation of flammable and combustible liquids.

of UL 58

UL 58 was first published by Underwriters Laboratories (UL) in 1925. Since then, it has been regularly updated to align with technological advancements and changing safety standards. The main objective of UL 58 is to prevent leakage, explosions, and other hazards associated with underground tanks.

The standard covers various aspects, including tank materials, construction methods, corrosion protection, secondary containment, and equipment installation. It also provides guidelines for the compatibility of stored fluids with tank materials and addresses concerns such as venting, overfill prevention, and spill control.

Design and Construction Requirements

UL 58 specifies strict requirements for the design and construction of underground tanks. It outlines detailed specifications for tank dimensions, shell thickness, ribbing, openings, and fittings. These requirements ensure structural integrity and resistance to pressure, soil stresses, and external forces.

The standard mandates the use of steel as the primary material for underground tanks due to its strength and durability. It also provides guidance on different types of coatings and linings to protect steel tanks from corrosion caused by soil or chemical interactions.

Maintenance and Inspection Practices

UL 58 emphasizes the importance of regular maintenance and inspections to ensure the continued safe operation of underground tanks. It provides recommendations for periodic testing, cleaning, and repairs. These practices help identify potential issues such as leaks, corrosion, and degradation of protective coatings.

Additionally, the standard suggests procedures for proper installation and maintenance of equipment, such as level gauges, leak detection systems, and spill control devices. It highlights the importance of training personnel involved in handling and monitoring these tanks to minimize risks and ensure compliance with safety regulations.

Conclusion

UL 58 plays a crucial role in ensuring the safe storage and transportation of flammable and combustible liquids. Its comprehensive guidelines and requirements for underground tank design, construction, and maintenance help prevent accidents, protect the environment, and safeguard public health. Adhering to UL 58 standards is not only necessary for regulatory compliance but also essential for mitigating potential risks associated with underground storage tanks.