ASC Z223 SECOND PUBLIC REVIEW DRAFT

Transcription

1 Copyright 2016 by American Gas Association and the National Fire Protection Association, All Rights Reserved BSR Z xx NFPA 54 20xx National Fuel Gas Code 2018 Edition ASC Z223 SECOND PUBLIC REVIEW DRAFT The following revisions are open for review and comment in accordance with ASC Z223 procedures. The joint committee, ASC Z223/NFPA 54, took action on public comments received during the NFPA Frist Revision Draft Public Review. Persons who submitted comments on the first draft will need to refer to the NFPA Second Revision Report for disposition of their public comments and follow the NFPA process for any challenges to those actions. The ASC Z223 is the result of public comments that were either approved as submitted or committee amended code text to address a public comment. How to Use the Draft: Revisions from the First Revision Draft are identified as additions (underlined) and deletions (strikethrough). Each revision is identified by its Second Revision Number in brackets (for example, [SR No. 1-NFPA 54/Z ] ). The SR identification is placed at the end of each revised section(s) or specific revision. The committee reason for each revision can be found attached. How to Submit a Comment: Comments must address only the revisions shown in this draft. Complete the ASC Z223 comment form and return it by the deadline date to address shown on the form. Please note that comments received will be addressed in accordance with the ASC Z223 procedures and are not forwarded to NFPA. Chapter 2 Referenced Standards {2.1 through 2.2 unchanged} International Publications. American Society for Testing and Materials International, 100 Barr Harbor Drive, West Conshohocken, PA , , B210, Standard Specification for Aluminum and Aluminum-Alloy Drawn Seamless Tubes, [SR No. 32-NFPA D2513, Standard Specification for Thermoplastic Gas Pressure Pipe, Tubing, and Fittings, [SR No. 32- NFPA BSR Z223.1/NFPA x SECOND PUBLIC REVIEW DOCUMENT F2945, Standard Specification for Polyamide 11 Gas Pressure Pipe, Tubing, and Fittings, [SR No. 32- NFPA 2.4 References for Extracts in Mandatory Sections. 1, Standard for the Installation of Oil-Burning Equipment, edition. [SR No. 3-NFPA NFPA 70, National Electrical Code, edition. [SR No. 3-NFPA NFPA 101, Life Safety Code, edition. [SR No. 3-NFPA NFPA 211, Standard for Chimneys, Fireplaces, Vents, and Solid Fuel-Burning Appliances, 2010 edition. [SR No. 3- NFPA NFPA 501, Standard on Manufactured Housing, edition. [SR No. 3-NFPA NFPA 5000, Building Construction and Safety Code, edition. [SR No. 3-NFPA Chapter 3 Definitions {3.1 through unchanged} Low-Pressure Boiler. A boiler for generating steam at gauge pressures not in excess of 15 psi (gauge pressure of 103 kpa) or for furnishing water at a maximum temperature of 250 F (121 C) at a maximum gauge pressure of 160 psi (gauge pressure of 1,100 kpa). [31, ]. [SR No. 1- NFPA { through unchanged} Natural Draft. Draft produced by the difference in the weight of a column of flue gases within a chimney or vent and a corresponding column of air of equal dimension outside the chimney or vent venting system. [21131, ] [SR No. 2-NFPA { through unchanged} Effective Ground-Fault Current Path. An intentionally constructed, low-impedance electrically conductive path designed and intended to carry current under ground-fault conditions from the point of a ground fault on a wiring system to the electrical supply source and that facilitates the operation of the overcurrent protective device or ground-fault detectors on high-impedance grounded systems. [70, ] [SR No. 27-NFPA * Monitor Regulator. A regulator installed in series with a pressure regulator and that senses the same downstream pressure as the pressure regulator for the purpose of preventing an overpressure in the downstream piping system when the pressure regulator fails to control the downstream pressure. A pressure regulator that is installed in series with another pressure regulator for the purpose of preventing an overpressure in the downstream piping system. 1 rev

2 [SR No. 19-NFPA 5.5 Piping System Operating Pressure Limitations Piping System Operating Pressure Limitations. The maximum design operating pressure for any piping system shall not exceed 125 psi. [SR No. 4-NFPA Maximum Design Operating Pressure in Buildings. The maximum design operating pressure for piping systems located inside buildings shall not exceed 5 psi (34 kpa) unless one or more of the following conditions are met: [SR No. 5- NFPA (7) The piping system is an LP-Gas piping system with a design an operating pressure greater than 20 psi (140 kpa) and complies with NFPA 58, Liquefied Petroleum Gas Code. [SR No. 5-NFPA LP-Gas Systems Operating Below -5 F (-12 C). LP- Gas systems designed to operate below -5 F (-21 C) or with butane or a propane-butane mix shall be designed to either accommodate liquid LP-Gas or prevent LP-Gas vapor from condensing back into a liquid. [SR No. 6-NFPA 54/Z ] Steel, Stainless Steel, and Wrought-Iron. Steel, Stainless Steel, and wrought-iron pipe shall be at least Schedule 4010 and shall comply with one of the following dimensional standards of ANSI/ASME B36.10M, Welded and Seamless Wrought Steel Pipe, and one of the following: (1) ANSI/ASME B36.10M, Welded and Seamless Wrought Steel Pipe (21) A53, Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated Welded and Seamless (32) A106, Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service (43) A312, Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes. [SR No. 20-NFPA, [SR No. 30-NFPA Plastic Polyamide pipe, tubing and fittings, other than polyethylene, shall be identified and conform to the 2008 edition of D2513F2945, Standards Specification for ThermoplasticPolyamide 11 Gas Pressure Pipe Tubing and Fittings. Pipe to be used shall be marked gas and D2513F2945. [SR No. 29-NFPA * Pipe Joints. Schedule 40 and heavier pipe Pipe joints shall be threaded, flanged, brazed, or welded, or assembled with press-connect fittings listed to ANSI LC 4/CSA 6.32, Press-Connect Metallic Fitting for Use in Fuel Gas Distribution Systems. (A) Pipe lighter than Schedule 40 shall be connected using press-connect fittings, flanges, brazing, or welding. BSR Z223.1/NFPA x SECOND PUBLIC REVIEW DOCUMENT (B) Where nonferrous pipe is brazed, the brazing materials shall have a melting point in excess of 1,000 F (538 C). (C) Brazing alloys shall not contain more than 0.05 percent phosphorus. [SR No. 21-NFPA Where Required. A line pressure regulator or gas appliance pressure regulator, as applicable, shall be installed where the gas supply pressure exceeds the maximum allowable inlet pressure of the appliance served. [SR No. 7- NFPA Listing. Line pressure regulators shall be listed in accordance with ANSI Z21.80/CSA 6.22, Line Pressure Regulators, where the outlet pressure is set to 2 psi or less. [SR No. 7-NFPA 2 rev

3 BSR Z223.1/NFPA x SECOND PUBLIC REVIEW DOCUMENT Table 6.2.1(p) Corrugated Stainless Steel Tubing (CSST) Gas Natural Inlet pressure Less than 2 psi Pressure Drop 3.0 in. w.c. Specific Gravity 0.60 INTENDED USE: Initial supply pressure of 8.0 in. w.c. or greater Flow Designation: Length (ft) Tube Size (EHD) Capacity in Cubic Feet of Gas per Hour ,180 1,370 2, ,430 5,010 8,800 10, , ,200 3,560 6,270 7, , ,540 2,910 5,140 5, , ,200 2,530 4,460 5, ,960 2,270 4,000 4, ,790 2,070 3,660 4, ,550 1,800 3,180 3, ,380 1,610 2,850 3, ,260 1,470 2,600 2, ,170 1,360 2,420 2, ,090 1,280 2,260 2, ,030 1,200 2,140 2, ,140 2,030 2, ,660 1, ,440 1, ,290 1, ,180 1,320 Notes: 1. Table includes losses for four 90-degree bends and two end fittings. Tubing runs with larger numbers of bends and/or fittings shall be increased by an equivalent length of tubing to the following equation: L = 1.3n where L is additional length (ft) of tubing and n is the number of additional fittings and/or bends. 2. EHD Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the greater the gas capacity of the tubing. 3. All table entries have been rounded to 3 significant digits. [SR No. 8-NFPA 3 rev

4 Table 6.2.1(q) BSR Z223.1/NFPA x SECOND PUBLIC REVIEW DOCUMENT Corrugated Stainless Steel Tubing (CSST) Gas Natural Inlet pressure Less than 2 psi Pressure Drop 6.0 in. w.c. Specific Gravity 0.60 INTENDED USE: Initial supply pressure of 11.0 in. w.c. or greater Flow Designation: Length (ft) Tube Size (EHD) Capacity in Cubic Feet of Gas per Hour ,690 1,950 3, ,280 7,050 12,400 14, ,180 1,370 2, ,430 5,010 8,800 10, ,110 1, ,610 4,100 7,210 8, , ,120 3,560 6,270 7, , ,790 3,190 5,620 6, , ,540 2,910 5,140 5, , ,200 2,530 4,460 5, ,960 2,270 4,000 4, ,790 2,070 3,660 4, ,660 1,920 3,390 3, ,550 1,800 3,180 3, ,460 1,700 3,000 3, ,380 1,610 2,850 3, ,130 1,320 2,340 2, ,140 2,030 2, ,020 1,820 2, ,660 1,860 Notes: 1. Table includes losses for four 90-degree bends and two end fittings. Tubing runs with larger numbers of bends and/or fittings shall be increased by an equivalent length of tubing to the following equation: L = 1.3n where L is additional length (ft) of tubing and n is the number of additional fittings and/or bends. 2. EHD Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the greater the gas capacity of the tubing. 3. All table entries have been rounded to 3 significant digits. [SR No. 8-NFPA 4 rev

5 Conduit with Both Ends Terminating Indoors. Where the conduit originates and terminates within the same building, the conduit shall originate and terminate in a an accessible portion of the building and where gas leakage from the conduit would be detected by the occupants. The conduit terminations and shall not be sealed. [SR No. 9-NFPA { Point of Delivery Service Valve. Where the point of natural gas delivery is the outlet of the service meter assembly or the outlet of the service regulator, a full size shutoff valve shall be installed downstream from the point of delivery. [SR No. 10-NFPA * Existing Appliances. Existing appliance installations shall be inspected to verify compliance with the provisions of Section 9.3 and Chapter 12 where a component of the building envelope is modified as described by one or more of (1) through (6). Where the appliance installation does not comply with Section 9.3 and Chapter 12, the installation shall be altered as necessary to be in compliance with 9.3 and Chapter 12. The installer responsible for making the envelope component change shall be responsible for compliance with this section. (1) The building is modified under a weatherization program. (2) A building permit is issued for a building addition or exterior building modification. (3) Three or more window assemblies are replaced. (4) Three or more storm windows re installed over existing windows. (5) One or more exterior door and frame assemblies are replaced. (6) A building air barrier is installed or replaced. [SR No. 12-NFPA Where installed at a manifold, the appliance shutoff valve shall be located within 50 ft (15 m) of the appliance served and shall be readily accessible and permanently identified. The piping from the manifold to within 6 ft (1.8 m) of the appliance shall be designed, sized, installed, and tested in accordance with Chapters 5, 6, 7, and 8. The location of shutoff valves for appliances installed in attics, crawl spaces, or on roofs shall be within 6 ft (1.8m) of the appliance. [SR No. 22-NFPA Figure Method of installing a tee fitting sediment trap. [SR No. 23-NFPA Exhaust ducts shall be constructed of rigid metallic material. Transition ducts used to connect the dryer to the exhaust duct shall be listed and labeled in accordance with ANSI/UL 2158A, Clothes Dryer Transition Ducts, for that application or and installed in accordance with the clothes dryer manufacturer's installation instructions. [SR No. 28-NFPA Installation in Fireplaces. Unvented room heaters shall not be installed in factory-built fireplaces except where the factory-built fireplace is listed for use with unvented room heaters. [SR No. 24-NFPA Table Type of Venting System to Be Used. Appliances Category II, Category III, and Category IV appliances Category III appliances Category IV appliances Type of Venting System Specified or furnished by manufacturers of listed appliances [SR No. 14-NFPA 3 in. (80 mm) or 3 pipe diameter minimum Location of Requirements , Plastic Piping. Where plastic piping is used to vent an appliance, the appliance shall be listed for use with such venting materials and the appliance manufacturer s installation instructions shall identify the specific plastic piping material. The plastic pipe venting materials shall be labeled in accordance with the product standards specified by the appliance manufacturer or shall be listed and labeled in accordance with ANSI/UL 1738, Venting Systems for Gas-Burning Appliances, Categories II, III, and IV. [SR No. 13-NFPA Plastic Vent Joints. Plastic pipe and fittings used to vent appliances shall be installed in accordance with the appliance manufacturer's installation instructions. Plastic pipe venting materials listed and labeled in accordance with ANSI/UL 1738, Venting Systems for Gas-Burning 5 rev

6 Appliances, Categories II, III, and IV, shall be installed in accordance with the vent manufacturer s installation instructions. Where primer is required, it shall be of a contrasting color. [SR No. 13-NFPA Special Gas Vent. Special gas vent shall be listed and labeled in accordance with ANSI/UL 1738, Venting Systems for Gas-Burning Appliances, Categories II, III, and IV, and installed in accordance with the special gas vent manufacturer s installation instructions. [SR No. 15- NFPA * Masonry chimneys shall be built and installed in accordance with NFPA 211, Standard for Chimneys, Fireplaces, Vents, and Solid Fuel-Burning Appliances, and lined with one of the following: (1) Aapproved clay flue lining, (2) Aa listed chimney lining system listed and labeled in accordance with ANSI/UL 1777, Chimney Liners, (3) or Oother approved material that will resist corrosion, erosion, softening, or cracking from vent gases at temperatures up to 1800 F (982 C). Exception: Masonry chimney flues lined with a chimney lining system specifically listed for use with listed appliances with draft hoods, Category I appliances, and other appliances listed for use with Type B vents shall be permitted. The liner shall be installed in accordance with the liner manufacturer s installation instructions. A permanent identifying label shall be attached at the point where the connection is to be made to the liner. The label shall read: This chimney liner is for appliances that burn gas only. Do not connect to solid or liquid fuel-burning appliances or incinerators. [SR No. 16-NFPA Table A.5.6 Pipe, Tube, Fittings, and Joints for Natural Gas and Liquefied Petroleum Gas Applications Metallic Pipe Pipe Material Black Steel Minimum Schedule Galvanized Steel minimum Schedule Wrought Iron Minimum Schedule Also known as low iron or wrought steel Stainless Steel Minimum Schedule 10 Standard A106/A106 M A53/A53M ANSI/ASM E B36.10M A312 Fitting Types Steel Malleable Iron Steel Cast Iron ANSI/ASME B16.1 Copper Alloy ANSI LC 4/CSA 6.32 Special Joint Types Threaded Flanged Press Connect Other Requirements 5.6.5, 5.6.6, 5.6.7, 5.6.8, , 7.13 Copper Copper Alloy Aluminum None Specified B241 Tubing Material Standard Copper B88 B280 CSST ANSI LC 1 / CSA 6.26 Aluminum Steel Stainless Steel B210 B241/B241 M A254/A254 M A268 A269 Cast Copper Alloy Copper Alloy Special Aluminum Special None Specified None Specified , , 5.6.5, 5.6.7, 5.6.8, , , , , 5.6.3, 5.6.5, 5.6.6, 5.6.7, 5.6.8, , 7.13 Metallic Tubing Other Fitting Types Joint Types Requirements Cast Copper Brazed 5.6.3, , Alloy 5.6.5, 5.6.6, Flanged/ , , Wrought Copper Brazed 7.13 Press fittings Mechanically meeting ANSI Pressed LC 4/CSA 6.32 (Crimped) Forged Copper Flared Alloy Press Connect Special ANSI LC 1 / CSA 6.26 Copper Alloy Special Special Manufacturer 5.6.5, 5.6.6, installation 7.2.6, 7.13, instructions 9.6.1(5) Compression 5.6.5, 5.6.6, 7.13, 9.6.1(2), 9.6.1(8) None Specified Approved Welded ANSI LC 4/CSA Brazed 6.32 Press Connect Non-Metallic Pipe & Tubing Pipe & Tubing Material Standard Fitting Type Joint Types Polyethylene Manufacturer (PE) D2513 instructions Polyamide (PA 11) F2945 Polyethylene (PE) & Polyamide (PA 11) D2513 (Heat fusion) Service head adapters meeting Category I of D2513 Compressiontype mechanical joints Heat Fusion 5.6.3, 5.6.5, 5.6.6, , , 5.6.5, 5.6.6, 7.13 Connections to Metallic Pipe meeting D2513, F1973, or F2509 Required standard. See Annex K for Standard title. [SR No. 20-NFPA, [SR No. 33-NFPA Other Requirements 5.6.5, 5.6.6, A The required bonding connection may be made from the piping to the electrical service equipment enclosure, to the grounded conductor at the electrical service, to the grounding electrode conductor (where of 6 rev

7 sufficient size), or directly to the grounding electrode. The bond may also be made to a lightning protection system grounding electrode (but not to down conductors) if the resulting length of the bonding conductor is shorter. Lightning protection grounding systems are bonded to the electrical service grounding electrodes in accordance with NFPA 780, Standard for the Installation of Lightning Protection Systems, using a method to minimize impedance between the systems. Listed clamps are manufactured to facilitate attachment of the bonding conductor to either a segment of rigid pipe or to a CSST copper alloy fitting. Clamps should be installed so as to remain accessible when building construction is complete. The maximum length of the bonding connection was established based on studies conducted by the Gas Technology Institute in Project Number 21323, Validation of Installation Methods for CSST Gas Piping to Mitigate Indirect Lightning Related Damage. The shortest practical length should always be used. State and local laws can limit who can attach the bonding connection to the building grounding system. The size of the bonding conductor, a 6 AWG copper wire, is a minimum and larger wire can be used. The requirement also permits conductors of different materials (of equivalent size) and both single wire and multi-strand. [SR No. 11-NFPA A The maximum length of the bonding connection was established based on studies conducted by the Gas Technology Institute in Project Number 21323, Validation of Installation Methods for CSST Gas Piping to Mitigate Indirect Lightning Related Damage. The shortest practical length should always be used. If the bonding jumper required would be longer than 75 ft, an additional grounding electrode may be installed to allow a bonding jumper that is 75 ft or less. [SR No. 11-NFPA A For information on decorative appliances for Annex C Suggested Method for Checking for Leakage {C.1 through C.2 unchanged} C.3 Leak check not using a Meter. The leak check can be done by one of the following methods: (1) For Any Gas System. (a) To an appropriate checkpoint, attach Attach a manometer or pressure gauge between the inlet to the piping system and the first regulator in the piping system, momentarily turn on the gas supply, and observe the gauging device for pressure drop with the gas supply shut off. No discernible drop in pressure should occur during a period of 3 minutes. (2) For Gas Systems Using LP-Gas: System Preparation for Propane. A leak check performed on an LP-Gas system being placed back in service may be performed using one of the following methods: (b) Insert a gauge/regulator test assembly between the container gas shutoff valve and first-stage regulator or integral two-stage regulator in the system. If a gauge/regulator test assembly with an inches water column gauge is inserted, follow the test requirements in C.3(2)(c) below; if a gauge/ regulator test assembly with a 30 psi gauge is inserted follow the test requirements in (d). (e) Insert a gauge/regulator test assembly on the downstream side of the first-stage regulator or at the intermediate pressure tap of an integral twostage regulator. If a gauge/regulator test assembly, with an inches water column gauge is inserted, follow the test requirements in C.3(2)(c) above; if a gauge/regulator test assembly with a 30 psi gauge is inserted follow the test requirements in C.3(2)(d) above. [SR No. 25-NFPA Annex K Informational Publications NFPA 56, Standard for Fire and Explosion Prevention During Cleaning and Purging of Flammable Gas Pipeline Systems, 2017 edition. [SR No. 31-Z ] NFPA 58, Liquefied Petroleum Gas Code, edition. [SR No. 31-Z ] NFPA 68, Standard on Explosion Protection by Deflagration Venting, 2013 edition. NFPA 70, National Electrical Code, 2017 edition. [SR No. 31-NFPA NFPA 90A, Standard for the Installation of Air- Conditioning and Ventilating Systems, edition. [SR No. 31-Z ] NFPA 90B, Standard for the Installation of Warm Air Heating and Air-Conditioning Systems, edition. [SR No. 31-Z ] NFPA 96, Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations, edition. [SR No. 31-Z ] NFPA 780, Standard for the Installation of Lightning Protection Systems, edition. [SR No. 31-Z ] ANSI/ASME B16.1, Gray Iron Pipe Flanges and Flanged Fittings: Classes 25, 125, and 250, [SR No. 31-NFPA A53/A53M, Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc Coated Welded and Seamless, [SR No. 31-NFPA 7 rev

8 A106/A106m, Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service, [SR No. 31-NFPA A254/A254M, Standard Specification for Copper-Brazed Steel Tubing, [SR No. 31-NFPA B241/B241M, Standard Specification for Aluminum and Aluminum-Alloy Seamless Pipe and Seamless Extruded Tube, [SR No. 31-NFPA B280, Standard Specification for Seamless Copper Tube for Air-Conditioning and Refrigeration Field Service, [SR No. 31-NFPA D2385, Test Method for Hydrogen Sulfide and Mercaptan Sulfur in Natural Gas (Cadmium Sulfate Iodometric Titration Method), 1981, reaffirmed 1990 (Withdrawn 1995). [SR No. 31-NFPA D2513, Standard Specification for Thermoplastic Gas Pressure Pipe, Tubing, and Fittings, 2009 [SR No. 31-NFPA F2509, Standard Specification for Fieldassembled Anodeless Riser Kits for Use on Outside Diameter Controlled Polyethylene Gas Distribution Pipe and Tubing, [SR No. 31-NFPA 54/Z ] F2945, Standard Specification for Polyamide 11 Gas Pressure Pipe, Tubing, and Fittings, 2015 [SR No. 31- NFPA AWS B2.1/B2.1M, Specification for Welding Procedure and Performance Qualification, [SR No. 31-NFPA AWS B2.2/B2.2M, Specification for Brazing Procedure and Performance Qualification, [SR No. 31-NFPA ANSI LC 1/CSA 6.26, Fuel Gas Piping Systems Using Corrugated Stainless Steel Tubing (CSST), [SR No. 31-NFPA ANSI LC 4/CSA 6.32, Press-Connect Metallic Fittings for Use in Fuel Gas Distribution Systems, [SR No. 31-NFPA K U. S. Government Publications. U.S. Government Publishing Office, 732 North Capitol Street, NW. Washington, DC Responding to Residential Carbon Monoxide Incidents, Guidelines for Fire and Other Emergency Response Personnel, U.S. Consumer Product Safety Commission, July 23, 2002 [Z223.1 only, ASC Z223 Secretary editorial harmonization between publications NFPA 54 and ASC Z223.1] K.2.2 CSA Group Publications. CSA Group, 8501 East Pleasant Valley Road, Cleveland, OH , , ANSI NGV 1/CSA NGV 1, Compressed Natural Gas Vehicle (NGV) Fueling Connection Devices, 2006, reaffirmed [SR No. 31-NFPA ANSI/CSA NGV 2, American National Standard for Natural Gas Vehicle Fuel Containers. 2007, reaffirmed [SR No. 31-NFPA ANSI/IAS U.S. LC 2, Direct Gas-Fired Circulating Heaters for Agricultural Animal Confinement Buildings, 1996 (Rreaffirmed 2015). [SR No. 31-NFPA 54/Z ] ANSI LC 2A, Agricultural Heaters,1998 ANSI Z21.1, Household Cooking Gas Appliances, [Z223.1 only, ASC Z223 Secretary editorial correction] ANSI Z21.1/CSA 1.1, Household Cooking Gas Appliances, 2016 [Z223.1 only, ASC Z223 Secretary editorial harmonization between publications NFPA 54 and ASC Z223.1] ANSI Z /CGACSA 2.91, Gas-Fired, Heat Activated Air-Conditioning and Heat Pump Appliances, 1996 reaffirmed [SR No. 31-NFPA ANSI Z21.57, Recreational Vehicle Cooking Gas Appliances, 2010, reaffirmed [SR No. 31-NFPA ANSI Z21.69, Connectors for Movable Gas Appliances, 2015 [ASC Z223 Secretary editorial harmonization between publications NFPA 54 and ASC Z223.1] ANSI Z21.71, Automatic Intermittent Pilot Ignition Systems for Field Installation, 1993, reaffirmed [SR No. 31-NFPA ANSI Z21.78/CGACSA 6.20, Combination Gas Controls for Gas Appliances, , reaffirmed [SR No. 31-NFPA ANSI Z21.91, Ventless Firebox Enclosures for Gas- Fired Unvented Decorative Room Heaters, 2007, reaffirmed 2012 [SR No. 31-NFPA ANSI Z83.8/CGACSA 2.6, Gas Unit Heaters, Gas Packaged Heaters, Gas Utility Heaters and Gas-Fired Duct Furnaces, [SR No. 31-NFPA 54/Z ] ANSI Z83.11/CGACSA 1.8, Gas Food Service Equipment, 2006 (Reaffirmed 2012) [SR No. 31- NFPA ANSI Z83.21/CSA C 22.2 No.168, Commercial Dishwashers, (Reaffirmed 2011) [SR No. 31-NFPA ANSI/UL 441, Gas Vents, 2010, Reapproved [SR No. 31-NFPA K.2.6 U.S Government Publications. U.S. Government Manufactured Home Construction and Safety Standard, Code of Federal Regulations, Title 24, Code of Federal 8 rev

9 Regulations, Part 3280, Manufactured Home Construction and Safety Standard. [SR No. 31-NFPA 9 rev

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11 [SR No. 1-NFPA SECOND PUBLIC REVIEW COMMITTEE STATEMENTS This change is made to align with the most recent edition of NFPA 31. [SR No. 2-NFPA This change is made to align with the most recent edition of NFPA 211. The 2016 edition of NFPA 211 extracts the definition from NFPA 31. [SR No. 3-NFPA Updating the extracted documents to their most recent edition. [SR No. 4-NFPA Current language implies operating pressure and design operating pressure could be different. Also, the design of the gas piping system may be greater than 125 PSI, but it should never operate above 125 PSI. This revision does not add "gas" to piping systems because that would be redundant based on the scope of the code. [SR No. 5-NFPA Current language implies operating pressure and design operating pressure could be different. Also, the design of the gas piping system may be greater than 125 PSI, but it should never operate above 125 PSI. This revision does not add "gas" to piping systems because that would be redundant based on the scope of the code. This revision also does not add "system" because the requirements are meant to apply only to a portion of the piping system (for example the portion in a ventilated chase), not the system as a whole. [SR No. 6-NFPA The term "low temperature" is subjective and this revision gives a specific threshold. [SR No. 7-NFPA "Gas appliance pressure regulator" was removed because appliance regulators do not fall under the scope of the code. The intent of a line pressure regulator listed in accordance with ANSI Z21.80/CSA 6.22 has to do with an installation where the appliance is rated for 0.5 PSI (typically this is an appliance listed to any one of the ANSI Z21/83 series standards) and the supply pressure is greater than 0.5 PSI. Listing to ANSI Z21.80/CSA 6.22 should be required only when its outlet pressure is 2 PSI or less. [SR No. 8-NFPA The committee is advised that the flow values provided for EHD 39 have been calculated based on test data on product from all manufacturers, using the methodology that was used for the current CSST tables. Flow values for EHD 39 are included in the other CSST sizing tables for natural gas, (o), (r), and (s); and that the tables for undiluted propane, tables (h) through (j) also include EHD 39. [SR No. 9-NFPA The first revision draft change was accepted without evidence that the current installation practice is unsafe. The requirement that a gas leak be detectable by the occupants is unenforceable since the term is undefined, and even if defined, is open to interpretation since an individual s ability to detect varies. The code currently does not specify

12 SECOND PUBLIC REVIEW COMMITTEE STATEMENTS the installation location for all other gas piping such that leaks are detectable, assuming any leak within the building will be noticed. [SR No. 10-NFPA The revision would require the installation of a shut off valve after the point of delivery. The public input was submitted based on a convenience for the serving gas supplier and no safety related evidence was presented to justify the additional valve. There is some concern that having an accessible valve with an easy to shut off valve handle may be subject to tampering. Also, the code would not require the valve termination be capped for new construction where the building piping has not yet be pressure tested or where the appliances have not yet been installed. This may lead to cases where the valve is mistakenly opened prior to complete installation. The new code text does not provide minimum location criteria and does not define what full size means (pipe diameter, flow, etc.). The current code does not prohibit a gas supplier from installing a customer owned valve where the gas provider and builder have arranged safeguards for such installations. [SR No. 11-NFPA This language is more appropriately located in section A which sets the 75-foot requirement. [SR No. 12-NFPA This addition to the Code provides requirements for a problem that has been recognized for some time, specifically changes to a building's envelope to conserve energy. Declaring that the installer is "responsible" is problematic as the installer will most likely be someone who is not a gas appliance installer, or aware of the requirements of NFPA 54. The scope of NFPA 54 states: This code is a safety code that shall apply to the installation of fuel gas piping systems, appliances, equipment, and related accessories... This scope does not include installers of windows, siding, and other components used to increase building envelope tightness and is therefore unenforceable as accepted as a first revision. [SR No. 13-NFPA This revision maintains the current requirement and highlights that there is an option to use UL 1738 certified products. This revision addresses the comments related to the conflict created by mandating UL 1738 as the only alternative. [SR No. 14-NFPA Table is revised to improve the format and delete the dashes. No information was provided to the code user on the meaning of dashes. The types of appliances in the first row are separated to more clearly indicate that all 5 types of venting systems can be used. The reference to NFPA 82 in the incinerator row is widened to two columns, as both the type of venting system is specified in NFPA 82. In the row for gas and oil-burning and gas and solid fuel-burning appliances chimney is centered vertically to more clearly indicate that chimneys must be used for all 5 types of appliances. These changes return the table to the format used in earlier editions and correct inadvertent format and layout revisions. References have been corrected to refer the user to the appropriate sections. [SR No. 15-NFPA ANSI/UL 1738 is the standard for listing special gas vents.

13 [SR No. 16-NFPA SECOND PUBLIC REVIEW COMMITTEE STATEMENTS Listed chimney lining systems are one of three methods already considered in the current code language to be acceptable for lining a masonry chimney. Reformatting clarifies there are three different options. The standard used for listing chimney liners is ANSI/UL [SR No. 19-NFPA The definition is revised to be more straightforward and remove requirements. [SR No. 20-NFPA The schedule 40 restriction was in place to safely accommodate threading of pipe. Allowing schedule 10 acknowledges different pipe joining methods. The revision will allow Schedule 10 pipe to be used for fuel gas piping in buildings. Schedule 10 pipe has a thinner wall than Schedule 40 and therefore is lighter and has a higher gas flow than Schedule 40. Schedule 10 pipe is currently allowed for fuel gas piping at pressures above 125 psig by ASME B31.1, Power Piping. As it is allowed for higher pressure than covered by the scope of the National Fuel Gas Code there is technical reason to not allow the material in NFPA 54. Due to the thinner wall of Schedule 10 pipe it cannot be threaded, and must be joined by other methods such as press connect fittings, welding, and other means. The revision does not limit the means of joining schedule 10 pipe other than not allowing threading. Schedule 10 pipe, while thinner than Schedule 40, has sufficient strength to withstand damage during installation. It should be sufficiently robust to not be dented, pinched, or punctured in normal installations in buildings. Because of the thinner wall, the inside diameter of Schedule 10 pipe is greater than Schedule 40. This results in a higher gas flow capacity of approximately 6 %. The to be increased by 6% where Schedule 10 is used. The existing table of pipe hanger spacing can be used for Schedule 10 pipe as the pipe is lighter than Schedule 40 pipe. [SR No. 21-NFPA The schedule 40 restriction was in place to safely accommodate threading of pipe. Allowing schedule 10 acknowledges different pipe joining methods. The revision will allow Schedule 10 pipe to be used for fuel gas piping in buildings. Schedule 10 pipe has a thinner wall than Schedule 40 and therefore is lighter and has a higher gas flow than Schedule 40. Schedule 10 pipe is currently allowed for fuel gas piping at pressures above 125 psig by ASME B31.1, Power Piping. As it is allowed for higher pressure than covered by the scope of the National Fuel Gas Code there is technical reason to not allow the material in NFPA 54. Due to the thinner wall of Schedule 10 pipe it cannot be threaded, and must be joined by other methods such as press connect fittings, welding, and other means. The revision does not limit the means of joining schedule 10 pipe other than not allowing threading. Schedule 10 pipe, while thinner than Schedule 40, has sufficient strength to withstand damage during installation. It should be sufficiently robust to not be dented, pinched, or punctured in normal installations in buildings. Because of the thinner wall, the inside diameter of Schedule 10 pipe is greater than Schedule 40. This results in a higher gas flow capacity of approximately 6 %. The current Schedule 40 pipe sizing tables can be used or a note can be added to the table to allow flow to be increased by 6% where Schedule 10 is used. The existing table of pipe hanger spacing can be used for Schedule 10 pipe as the pipe is lighter than Schedule 40 pipe. [SR No. 22-NFPA The first revision requirement was approved without substantiation that a safety issue exists. The current code allows such valves be located in a central location on manifold piping systems.

14 [SR No. 23-NFPA SECOND PUBLIC REVIEW COMMITTEE STATEMENTS A prescriptive minimum length as required by the previous edition code is preferable to the first revision change. [SR No. 24-NFPA The new requirement was not supported by technical data that demonstrated that installing an unvented heater in a factory-built fireplace that was not specifically listed for those heaters is a safety issue. [SR No. 25-NFPA Editorial revision for consistency. [SR No. 27-NFPA Updating extract to most recent edition. [SR No. 28-NFPA This revision clarifies the change made by the First Revision. [SR No. 29-NFPA Polyamide pipe, tubing, and fittings are now covered by F2945. [SR No. 30-NFPA B36.10M includes only dimensional specifications while the other three cover chemical composition and manufacturing of the pipe. Note: Schedule 40 is not being changed to Schedule 10 by this revision. This is being done by Second Revision 20. [SR No. 31-NFPA Updates to most recent editions of references. Polyamide piping, tubing, and fittings are now covered by F2945, so D2513 is removed. [SR No. 32-NFPA Polyamide piping and fittings, which were removed from D2513, are now covered by F2945. [SR No. 33-NFPA This table is being revised to reflect changes to the allowed piping materials in 5.6.

15 2 nd PUBLIC COMMENT FORM BSR Z x, NATIONAL FUEL GAS CODE COMMENTS ARE DUE NOVEMBER 14, 2016 Date Name Tel. No. Company Street Address City State Zip Please Indicate Organization Represented (if any) FOR OFFICE USE ONLY Log: Date Rec'd: 1. Second Revision (SR) Number 2. Comment recommends (check one) new text revised text deleted text 3. Comment (include proposed new or revised wording, or identification of wording to be deleted): (Note: Proposed text should be in legislative format: i.e., use underscore to denote wording to be inserted (inserted wording) and strikethrough to denote wording to be deleted (deleted wording). Second public review comments are to be restricted to the indicated revision(s) only. 4. Statement of Problem and Substantiation for Comment: (Note: State the problem that will be resolved by your recommendation; give the specific reason for your comment including copies of tests, research papers, fire experience, etc. If more than 200 words, it may be abstracted for publication.). 5. Copyright Assignment I am the author of the text or other material (such as illustrations, graphs) proposed in this Comment. Some or all of the text or other material proposed in this Comment was not authored by me. Its source is as follows: (please identify which material and provide complete information on its source) I hereby grant and assign to the NFPA and AGA all and full rights in copyright in this Comment and understand that I acquire no rights in any publication of NFPA and AGA in which this Comment in this or another similar or analogous form is used. Except to the extent that I do not have authority to make an assignment in materials that I have identified in (b) above, I hereby warrant that I am the author of this comment and that I have full power and authority to enter into this assignment. Signature (Required): Check this box if filing electronically to indicate your acceptance of the above permission statement. PLEASE USE SEPARATE FORM FOR EACH PROPOSAL Send to: Secretary, National Fuel Gas Code American Gas Association, 400 N. Capitol St., NW, Washington, DC Fax: , pcabot@aga.org

16 Type or print in Black Ink. INSTRUCTIONS FOR SUBMITTING COMMENTS PLEASE READ CAREFULLY Indicate the specific Second Revision Number (for example, SR No. 1) that the comment applies to. Check the appropriate box to indicate whether this comment recommends adding new text, revising proposed text, or deleting the text. In the space identified as "Comment" indicate the exact wording you propose as new or revised text, or the text you propose be deleted. Attach comments that do not fit into the space provided. In the space title "Statement of Problem and Substantiation for Comment" state the problems that will be resolved by your recommendation and give the specific reason for your comment. Include copies of test results, research papers, fire experience, or other materials that substantiate your recommendation. Attach statements that do not fit into the space provided. Check the appropriate box to indicate whether or not this comment is original material, and if it is not, indicate the source of the material. Sign the comment if mailing or faxing or check the box if submitting electronically. If supplementary material (photographs, diagrams, reports, etc.) is included, you may be required to submit sufficient copies for all members and alternates of the technical committee. The technical committee is authorized to abstract the "Statement of Problem and Substantiation for Comment" if it exceeds 200 words for publication in the Report on Comment documents. Send to: Secretary, National Fuel Gas Code American Gas Association, 400 N. Capitol St., NW, Washington, DC Fax: ,