Liquefied Petroleum Gases Bulk Storage Regulations (C.R.C., c. 1152)

45 (1) The piping system shall be electrically grounded for protection against the build-up of static electricity, as prescribed in the latest edition of the National Fire Protection Association Pamphlet No. 77.  The resistance to ground should be as low as possible and preferably not more than 6 ohms.

(2) All pipelines shall be bonded at the joints with a No. 6 electrical conductor where flow to ground is interrupted by a gasket, joint compound, etc.