


UL 58, Steel Underground Tanks for Flammable and Combustible Liquids.

The UL Standards for tanks that store flammable and combustible liquid are: The organization conducts investiga-tions on products to determine their com-pliance with a number of nationally or internationally recognized standards, including those of UL, the National Fire Protection Association (NFPA), the Amer-ican National Standards Institute (ANSI), the American Society for Testing Materials (ASTM) and the International Electrotech- nical Commission (IEC). UL is an independent, not-for-profit testing organization, founded more than a century ago. Underwriters Laboratories tests more than 80,000 products in more than 17,000 product cate-gories every year, including many in the petroleum equipment indus-try.
