Which standard specifies the installation regulations for underground containers used for LP gas?

The standard that specifies the installation regulations for underground containers used for LP gas is NFPA 58, also known as the Liquefied Petroleum Gas Code. This code is critical in ensuring the safe storage and handling of LP gas, and it particularly addresses the design, installation, inspection, and maintenance of both aboveground and underground tanks.

NFPA 58 outlines specific guidelines for the location, construction, and materials required for underground tanks, which are essential to prevent leaks and ensure safety in handling propane. This includes stipulations on burial depth, clearance from other structures, and requirements for protecting the tank from corrosion. These regulations are designed to minimize risks associated with LP gas storage, making NFPA 58 an authoritative resource in the industry for safe practices related to LP gas containers.

Other standards listed, such as ASME and ICC, focus on different aspects of pressure vessels and building codes respectively, while the EPA primarily deals with environmental protection, including regulations regarding hazardous materials, but does not set specific installation standards for LP gas containers. Therefore, NFPA 58 is the relevant standard in this context.