Underwriters Laboratories standard 971 deals with underground piping for flammable liquids that is not made of metal. The specification from October 1995 has been revised and will become effective beginning July 1, 2005.
State Responses to UL 971 Survey
PEI has surveyed the UST State Program Managers to see how their state intends to handle "new" and "old" UL 971-listed pipe. We asked each state: Will your state allow piping listed to the 1995 standard to be installed after the new UL 971 requirements become effective (July 1, 2005)?
As the states respond to our survey the results will be posted here for tank owners, regulators, equipment manufacturers, distributors and installers to view.
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