Abstract
As a result of a series of serious railroad accidents involv ing certain uninsulated pressure tank cars transporting hazardous materials, the specifications for railroad tank cars were amended in the interest of safety. Specification 112 and 114 tank cars used to transport flammable gases such as propane, butane, and vinyl chloride are required to have both thermal and tank head protection. Newly built cars must be so equipped starting on January 1, 1978, and existing cars must be retrofitted before December 31, 1981.
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