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£55T GAS TUmSG OONnIP({; This actually page 2 of this code the following page is page 1
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• a) Corrugated Stainless Steel Tubing shall be permitted to be used as approved in the
most recent codes that have been adopted. Current CSST approval codes are 2009 Fuel
Gas Code Section 403.5.4 and 20091ntemational Residential Code G2414.5.3.
• b) Corrugated Stainless Steel Tubing shall be installed to meet the installation
requirements of sections G 2415 and Fuel Gas Code section 404. 1. The following
installation reouirements shall be used in addition to the requirements listed in the
adopted codes.
c) CSST shall not be allowed within the space between roof rafters.
• d) CSST shall not be allowed on the roof deck side of insulation installed between rafters.
e) CSST shall not enter the attic by passing through the top plate of an exterior wall.
f) CSST shall be installed with approved change in direction fittings per the manufactures
instructions.
• oj eSST shall nnt be installed bv tvma on the top side of ceiling Joist.
• 'n) CSST shall be installed with a minimum of 6 inches separation from HVAC ductwork,
Electrical wiring. Communication wiring. Metal electrical fixture boxes and their supports,
or any other material that may create a path to ground.
i) A minimum of 6 inches shall be maintained between the CSST and house wiring
located within a wall cavity.
j) CSST shall be bonded by a minimum bare number 6 solid copper wire. The bonding
wire shall be attached to a lug added for that purpose in the main load center.
k) CSST bonding wire shall be attached to a brass nut located on the CSST manifold.
with the other end connecting to the lug added in the main load center.
I) CSST bonding shall be installed by a licensed electrical contractor that is registered
with Rogers County.
m) CSST with damaged outer covering shall be replaced.
n) CSST shall not be spliced.
• 0) In Hybrid systems CSST shall not pass through walls.
p) CSST used to repair an existing black pipe system shall be installed to meet the
connector requirements as stated in Section 411 of the 2009 International Mechanical
Code.
q) When a CSST system is repaired or when equipment supplied by a CSST system is
replaced the system shall be bonded to meet the current bonding requirements in place
at the time of replacement.
CSST Gas Piping Codes, Specifications, Industry Trade
Associations
o 2009 Fuel Gas Code Section 403.5.4
• 2009 International Residential Code G2414.5.3
ANSI Z223.1 I NFPA 54 National Fuel Gas Code (2015)
CSST Safety Website: CSST Safety (http://www.csstsafety.com). hosted by the National Association of Fire
Marshals (NASFM). http://www.firemarshals.orgIThiswebsite discusses various aspects
of CSST safety including lightning hazards. electrical ground bonding and grounding
connections. and recommendations for consumers.
, "Direct Bonding of Standard (Yellow) CSST. Bonding Details" [PDFJ. - retrieved 13
April 2015. original source: http://www.csslsafely.comllmageslCSST·Direct-Bonding- Ted'l-
Bulletin.pdf
Excerpt:
Direct bonding is required for gas piping systems incorporating stanCiarCi (yellow) or
L
CSST Gas Piping Installation Code, Safety & Protection Features
• Code compliance: corrugated Stainless Steel Tubing should be installed to meet the
installation requirements of sections G 2415 and Fuel Gas Code section 404.1.
Additional local regulations may apply and may extend or supercede these model code
guides.
• Watch out: your local building regulations are likely to be different from the example
details given just below, and in in some jurisdictions CSST gas piping is prohibited:
• "Definitions, B. section 12 35 3D-residential Casework." City Of Philadelphia (2011)
in Philadelphia: OHCD/PHCDIRDFA Small Building Regulations (2011), Division 22
Plumbing, Quality Standards and Construction Procedures: - rebieved 14 Apr 2015,
original source:
hltp:/lwww.phila.gov/ohcdlsmalibldgspecs!smalibuildingspecsjune2011.pdr #page=231
Excerpt:
Corrugated Stainless Steel Tubing (CSST) is not permitted for gas piping.
• Direct Electrical Ground Bonding of Standard Yellow CSST is required to the
building's grounding conductor system using 6 AWG copper or larger is required for
"standard yellow CSST" and must comply with the U.S. National Electrical Code (NEC),
NFPA 70, and in Canada the Canadian Electrical Code (CSA-22.1 (CEC).
The industry safety association [csstsafety.com] notes that
Manufactures of black jacketed CSST products which have been tested and listed to
ICC-ES LC 1024, "CSST Utilizing a Protective Jackef', may not require or include in their
instructions the additional direct-bonding step that is required with standard (yellow)
CSST products. However local codes may be more restrictive and may differ from
manufacturer's requirements. Local codes take precedence and must be adhered-to.
The 2015 edition of the National Fuel Gas Code, International Fuel Gas Code, and
Uniform Plumbing Code limits the length of the bonding conductor to 75-ft. When there
are no local code requirements for the length of this conductor refer to the manufactures
instructions or the NEC / CEC for guidance regarding the permissible length of the
bonding conductor. - csssafety.com, Op. Cit.
• Electrical Ground System Bonding: NFPA 54 National Fuel Gas Code. Sec 7.13.2
specifies the CSST bonding requirement. See our note earlier in this article about
AmeriGas's comments about lightning protection for CSST gas piping. Ul467 pertains
regarding bonding clamps.
• Local building codes are controlling and may differ from manufacturer's requirements.
local codes are governing and must be adhered to.
• Manufacturers's installation instructions: The CSST manufacturers provide
installation specifications for their products. Most model and enacted buifding codes
require that just about any building component, equipment or device should be installed
in accordance with the manufacturer's instructions.
• Pressure limitations: some CSST gas piping systems put limits on the maximum gas
pressure allowed: for example DiamondBack's installation manual specifies that
This system and related components must be sued only with fuel gases, only where the
operating gas pressure does not exceed 5 psi. (34.48 kPa). The maximum actual
operating pressure including transients shall not in any case exceed 6.5 psi. - Op. en.
• Professional installation: CSST must be installed by a qualified professional and in
accordance with the Manufacturer's Design and Installation (0&1) Guide, including
bonding and grounding of the system
• Protection in concrete: Plastic conduit is required where CSST is run through concrete
slabs & foundations
• Protection of CSST from nails & screws
• Hardened naif plates are required where CSST passes through wood framing at
distances less than 3" from the cavity surfaces
• Flexible steel conduit is required where CSST is routed in "floppy sections" through
building cavities where it cannot be secured away from cavity surfaces. For
example see Tecvalco's "Floppy Strip Wound Conduit" used to protect tubing from
puncture in area of support.
• Support of CSST: some jurisdictions specify the maximum spacing of supports for
CSST, typically in the 1-2 meter range depending on the pipe diameter and rigidity.
Local CSST Gas Piping Specifications Extending the Model Codes for
Improved Safety
The following example is excerpted from a local Oklahoma Building Code for Rogers County,
Appendix H, , Subsection "Policy for installation of Corrugated Stainless Steel Tubing (CSST)",
in Appendix H-17Generallnfonnation and Responsibilities for One & Two Family Residential
Construction, . retrieved 14 April 2015, original source:
http;llwww.rogerscounty.orglplanningtzonlng5CAH.pd f -
£55T GAS TUmSG OONnIP({; This actually page 2 of this code the following page is page 1
t'orntptnl ~:"I'I~. Stf!d ~Ta .•.• t~
t
~,-,,;;"~,"'"
I
---"-_. --
..,;:.'
• a) Corrugated Stainless Steel Tubing shall be permitted to be used as approved in the
most recent codes that have been adopted. Current CSST approval codes are 2009 Fuel
Gas Code Section 403.5.4 and 20091ntemational Residential Code G2414.5.3.
• b) Corrugated Stainless Steel Tubing shall be installed to meet the installation
requirements of sections G 2415 and Fuel Gas Code section 404. 1. The following
installation reouirements shall be used in addition to the requirements listed in the
adopted codes.
c) CSST shall not be allowed within the space between roof rafters.
• d) CSST shall not be allowed on the roof deck side of insulation installed between rafters.
e) CSST shall not enter the attic by passing through the top plate of an exterior wall.
f) CSST shall be installed with approved change in direction fittings per the manufactures
instructions.
• oj eSST shall nnt be installed bv tvma on the top side of ceiling Joist.
• 'n) CSST shall be installed with a minimum of 6 inches separation from HVAC ductwork,
Electrical wiring. Communication wiring. Metal electrical fixture boxes and their supports,
or any other material that may create a path to ground.
i) A minimum of 6 inches shall be maintained between the CSST and house wiring
located within a wall cavity.
j) CSST shall be bonded by a minimum bare number 6 solid copper wire. The bonding
wire shall be attached to a lug added for that purpose in the main load center.
k) CSST bonding wire shall be attached to a brass nut located on the CSST manifold.
with the other end connecting to the lug added in the main load center.
I) CSST bonding shall be installed by a licensed electrical contractor that is registered
with Rogers County.
m) CSST with damaged outer covering shall be replaced.
n) CSST shall not be spliced.
• 0) In Hybrid systems CSST shall not pass through walls.
p) CSST used to repair an existing black pipe system shall be installed to meet the
connector requirements as stated in Section 411 of the 2009 International Mechanical
Code.
q) When a CSST system is repaired or when equipment supplied by a CSST system is
replaced the system shall be bonded to meet the current bonding requirements in place
at the time of replacement.
CSST Gas Piping Codes, Specifications, Industry Trade
Associations
o 2009 Fuel Gas Code Section 403.5.4
• 2009 International Residential Code G2414.5.3
ANSI Z223.1 I NFPA 54 National Fuel Gas Code (2015)
CSST Safety Website: CSST Safety (http://www.csstsafety.com). hosted by the National Association of Fire
Marshals (NASFM). http://www.firemarshals.orgIThiswebsite discusses various aspects
of CSST safety including lightning hazards. electrical ground bonding and grounding
connections. and recommendations for consumers.
, "Direct Bonding of Standard (Yellow) CSST. Bonding Details" [PDFJ. - retrieved 13
April 2015. original source: http://www.csslsafely.comllmageslCSST·Direct-Bonding- Ted'l-
Bulletin.pdf
Excerpt:
Direct bonding is required for gas piping systems incorporating stanCiarCi (yellow) or
L
CSST Gas Piping Installation Code, Safety & Protection Features
• Code compliance: corrugated Stainless Steel Tubing should be installed to meet the
installation requirements of sections G 2415 and Fuel Gas Code section 404.1.
Additional local regulations may apply and may extend or supercede these model code
guides.
• Watch out: your local building regulations are likely to be different from the example
details given just below, and in in some jurisdictions CSST gas piping is prohibited:
• "Definitions, B. section 12 35 3D-residential Casework." City Of Philadelphia (2011)
in Philadelphia: OHCD/PHCDIRDFA Small Building Regulations (2011), Division 22
Plumbing, Quality Standards and Construction Procedures: - rebieved 14 Apr 2015,
original source:
hltp:/lwww.phila.gov/ohcdlsmalibldgspecs!smalibuildingspecsjune2011.pdr #page=231
Excerpt:
Corrugated Stainless Steel Tubing (CSST) is not permitted for gas piping.
• Direct Electrical Ground Bonding of Standard Yellow CSST is required to the
building's grounding conductor system using 6 AWG copper or larger is required for
"standard yellow CSST" and must comply with the U.S. National Electrical Code (NEC),
NFPA 70, and in Canada the Canadian Electrical Code (CSA-22.1 (CEC).
The industry safety association [csstsafety.com] notes that
Manufactures of black jacketed CSST products which have been tested and listed to
ICC-ES LC 1024, "CSST Utilizing a Protective Jackef', may not require or include in their
instructions the additional direct-bonding step that is required with standard (yellow)
CSST products. However local codes may be more restrictive and may differ from
manufacturer's requirements. Local codes take precedence and must be adhered-to.
The 2015 edition of the National Fuel Gas Code, International Fuel Gas Code, and
Uniform Plumbing Code limits the length of the bonding conductor to 75-ft. When there
are no local code requirements for the length of this conductor refer to the manufactures
instructions or the NEC / CEC for guidance regarding the permissible length of the
bonding conductor. - csssafety.com, Op. Cit.
• Electrical Ground System Bonding: NFPA 54 National Fuel Gas Code. Sec 7.13.2
specifies the CSST bonding requirement. See our note earlier in this article about
AmeriGas's comments about lightning protection for CSST gas piping. Ul467 pertains
regarding bonding clamps.
• Local building codes are controlling and may differ from manufacturer's requirements.
local codes are governing and must be adhered to.
• Manufacturers's installation instructions: The CSST manufacturers provide
installation specifications for their products. Most model and enacted buifding codes
require that just about any building component, equipment or device should be installed
in accordance with the manufacturer's instructions.
• Pressure limitations: some CSST gas piping systems put limits on the maximum gas
pressure allowed: for example DiamondBack's installation manual specifies that
This system and related components must be sued only with fuel gases, only where the
operating gas pressure does not exceed 5 psi. (34.48 kPa). The maximum actual
operating pressure including transients shall not in any case exceed 6.5 psi. - Op. en.
• Professional installation: CSST must be installed by a qualified professional and in
accordance with the Manufacturer's Design and Installation (0&1) Guide, including
bonding and grounding of the system
• Protection in concrete: Plastic conduit is required where CSST is run through concrete
slabs & foundations
• Protection of CSST from nails & screws
• Hardened naif plates are required where CSST passes through wood framing at
distances less than 3" from the cavity surfaces
• Flexible steel conduit is required where CSST is routed in "floppy sections" through
building cavities where it cannot be secured away from cavity surfaces. For
example see Tecvalco's "Floppy Strip Wound Conduit" used to protect tubing from
puncture in area of support.
• Support of CSST: some jurisdictions specify the maximum spacing of supports for
CSST, typically in the 1-2 meter range depending on the pipe diameter and rigidity.
Local CSST Gas Piping Specifications Extending the Model Codes for
Improved Safety
The following example is excerpted from a local Oklahoma Building Code for Rogers County,
Appendix H, , Subsection "Policy for installation of Corrugated Stainless Steel Tubing (CSST)",
in Appendix H-17Generallnfonnation and Responsibilities for One & Two Family Residential
Construction, . retrieved 14 April 2015, original source:
http;llwww.rogerscounty.orglplanningtzonlng5CAH.pd f -