Code of Maryland Regulations › Title 09 - MARYLAND DEPARTMENT OF LABOR › Subtitle 20 - BOARD OF PLUMBING › Chapter 09.20.01 - State Plumbing Code › Section 09.20.01.04 - Modifications to the National Fuel Gas Code, ANSI Z223.1, NFPA 54

Current through Register Vol. 51, No. 14, July 12, 2024
A. Chapter 2
				REFERENCED PUBLICATIONS
On page 54-8, under 2.3.3 CSA America Publications, after
				  "ANSI LC 1/CSA 6.26, Fuel Gas Piping Systems Using Corrugated Stainless Steel
				  Tubing (CSST), "delete "2005 " and substitute "2014 ".
B. Chapter 5 GAS PIPING SYSTEM DESIGN,
				MATERIALS, AND COMPONENTS
On page 54-18, under 5.6.3.4C orrugated Stainless Steel, add
				  the following subsections:
"5.6.3.4.1C orrugated stainless steel tubing (CSST) shall be
				  listed in accordance with ANSI LC 1/CSA 6.26, Fuel Gas Piping Systems Using
				  Corrugated Stainless Steel Tubing (CSST).
5.6.3.4.2 CSST with an arc resistant jacket shall also be
				  listed for compliance with ANSI LC 1/CSA 6.26, Clause 5.16 - Arc Resistant
				  Jacket or Covering, including its manufacturing and production tests for
				  resistance to extreme temperature cycles, resistance to corrosion, robustness
				  against arcing, and resistance to installation damage.
5.6.3.4.3 Arc resistant CSST shall be listed for installation
				  without the additional electrical bond required by Section 7.13.2 for CSST that
				  is not arc resistant.
5.6.3.4.4 CSST shall be installed in accordance with this
				  Code and the manufacturer's instructions."
C. Chapter 7 GAS PIPING INSTALLATION. under
				Section 7.13 ELECTRICAL BONDING AND GROUNDING:
(1) On page 54-62, in subsection 7.13.1,
				change the section heading "Pipe and Tubing Other Than CSST" to "Gas Piping and
				Tubing, including CSST" and, in both instances, delete the words "other than
				CSST";
(2) On page 54-62, in
				subsection 7.13.2, delete the paragraph under subsection 7.13.2, and insert the
				following:
"(a) CSST with Arc-Resistant
				Jacket: A gas piping system that contains one or more segments of CSST without
				an arc-resistant jacket shall be bonded in accordance with this section. CSST
				gas piping without an arc-resistant jacket shall require an additional bond to
				the electrical service grounding electrode system. The bonding jumper shall
				connect to a metallic pipe or fitting between the point of gas delivery and the
				first downstream CSST fitting. The bonding jumper shall not be less than 6 AWG
				copper wire or equivalent;
(b) CSST
				Other than Arc-Resistant. Gas piping systems with any CSST that is not arc
				resistant shall be bonded to the electrical service grounding electrode system
				or, where provided, to a lightning protection grounding electrode system.
				"
(3) On page 54-63, add
				a new section as 7.13.3 with the heading, "CSST with an Arc-resistant Jacket"
				and the following paragraph:
"CSST gas piping with an arc-resistant jacket that is listed
				  by an approved agency for installation without the direct bonding required by
				  section 7.13.2 shall be installed in accordance with section 7.13.1 and the
				  manufacturer's installation instructions.";
(4) On page 54-63, renumber section "7.13.3
				Prohibited Use" to "7.13.4" with the same heading;
(5) On page 54-63, change subsections 7.13.3
				and 7.13.4 to read as follows:
"7.13.3 Arc-Resistant CSST. All CSST in an arc resistant gas
				  piping system shall be arc resistant. Each portion of an arc resistant CSST gas
				  piping system shall be electrically continuous and bonded to an effective
				  ground-fault current path. Arc-Resistant CSST gas piping shall be considered to
				  be bonded when it is connected to appliances that are connected to the
				  appliance grounding conductor of the circuit supplying electrical power to that
				  appliance.
7.13.4 Prohibited Use. Gas piping shall not be used as a
				  grounding conductor or electrode. "; and
(6) Renumber section
				"7.13.4 Lightning Protection Systems" to "7.13.5", with the same
				heading.