Flexible Underground Piping for Flammable and Combustible Liquids

Environmental concerns continue to be the number one issue for the petroleum industry today, with underground tanks and associated piping being the prime source for leaks of petroleum products. Advances in technology and experiences gained by industry continue to promote the introduction of new products to address these concerns. One such product is flexible underground piping, which has some advantages for industry over current piping practises. These include:

  • Elimination of joints and connections between the tanks and dispensers, and
  • Significantly reduced time of installation.

ULC Standards have been testing flexible piping for some time now. ULC/ORD-C971-2005 "Nonmetalic Underground Piping for Flammable and Combustible Liquids" is now used as the criteria for testing and listing of the piping and has replaced ULC/ORD-C107.4-1992 “Ducted Flexible Underground Piping for Flammable and Combustible Liquids".

ULC ORD's (Other Recognized Documents) are preliminary standards which are prepared in response to requests from, and in conjunction with, industry, code writing bodies, regulatory agencies and others prior to ULC inaugurating a certification programme. Prior to publication, ULC/ORD-C971-2005 was circulated to the ULC Fire Council for comment and was accepted. ORD's can become published ULC Standards and sometimes National Standards of Canada.

Underground piping which has been tested and listed in conformance with ULC/ORD-C971-2005 is considered acceptable for installation in British Columbia.

This Information Bulletin replaced Interpretation Bulletin No. IB007.