Mich. Admin. Code R. 29.7111 - Stray or impressed currents and bonding
Rule 111. Sections 5-4 to 5-4.3 of the storage and handling of gaseous and Liquefied H2 code are added as follows:
5-4 Stray or impressed currents and bonding.
5-4.1 Where stray or impressed currents are used or can be present on dispensing systems, such as cathodic protection, protective measures to prevent ignition shall be taken.
5-4.2 Static protection between the fuel dispenser and the vehicle shall not be required where H2 is transferred by conductive hose, flexible metallic tubing, or pipe connections where both halves of the metallic couplings are in continuous contact.
5-4.3 The transfer surface shall be concrete or shall have a resistivity not exceeding API RP 2003, "Protection Against Ignitions Arising Out of Static, Lightning, and Stray Currents," adopted by reference in section 8, performance criteria of 1 megohm as measured using a method acceptable to the department, such as EN 10 81:1998 "Resilient Floor Coverings - Determination of the Electrical Resistance," adopted by reference in section 8.
Notes
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