The following preprint is based on the First Revision Draft of the 2018 edition of NFPA 54/Z223.1.

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 NOTE: This preprint of the 2018 National Fuel Gas Code is provided for the convenience of the reviewer. NFPA s Terra on-line draft is the official source for information. Please visit for official drafts and reports. The following preprint is based on the First Revision Draft of the 2018 edition of NFPA 54/Z How to Use the Draft: The following draft shows those parts of the Code that the committee revised as the result of the First Draft revision stage. They are identified as additions (underlined) and deletions (strikethrough). Each revision is identified by its First Revision Number in brackets (for example, [FR No. 1-NFPA ). The FR identification is typically placed at the end of each revised section(s) or specific revision. In some cases the revision would only apply to the NFPA edition or the Z223.1 edition. These revisions are identified using the FR number within brackets as noted above but would only show the impacted document, NFPA 54 or Z223.1, within the brackets. The draft also identifies those sections that have not been revised shown in brackets (for example {3.9 through unchanged} ). Visit the NFPA website at to view the First Draft Report which contains the committee reasons for the FRs and any Committee Inputs (CI). The public can comment on any FR, actions taken on the public inputs, on any CI, and on unchanged sections (solely for the purpose of coordinating with sections revised by first revisions). Public comments to sections that address new topics will be held for the 2021 edition revision cycle. Public comments must be submitted using the NFPA on-line submittal process. valve where no meter is provided. For undiluted liquefied petroleum gas systems, the point of delivery shall be considered to be the outlet of the final pressure regulator, exclusive of line gas regulators, where no meter is installed. Where a meter is installed, the point of delivery shall be the outlet of the meter. (B) The maximum operating pressure shall be Natural gas systems operating at a pressure of 125 psi (862 kpa) or less. Exception No. 1: Piping systems for gas-air mixtures within the flammable range are limited to a maximum pressure of 10 psi (69 kpa). Exception No. 2: LP-Gas piping systems are limited to 20 psi (140 kpa), except as provided in (6). (C) LP-Gas systems operating at a pressure of 50 psi (345 kpa) or less. (D) Gas-air mixture systems operating within the flammable range at a pressure of 10 psi (69 kpa) or less. (CE) Piping systems requirements shall include design, materials, components, fabrication, assembly, installation, testing, inspection, operation, and maintenance. (DF) Requirements for appliances, equipment and related accessories shall include installation, combustion, and ventilation air and venting. [FR No. 61-NFPA This code shall not apply to the following items (reference standards for some of which appear in Annex K): [FR No. 54-NFPA 2.3 Other Publications. { (1) through 1.5 unchanged} Chapter 2 Referenced Standards {2.1 through 2.2 unchanged} ASME International Publications. American Society of Mechanical Engineers International, Two Three Park Avenue, New York, NY , , [FR No. 93-NFPA ] Chapter 1 Administrative {1.1 through unchanged} This code is a safety code that shall apply to the installation of fuel gas piping systems, appliances, equipment, and related accessories as shown in (A) through (DF). (A)*Coverage of piping systems shall extend from the point of delivery to the appliance connections. For other than undiluted liquefied petroleum gas systems, the point of delivery shall be the outlet of the service meter assembly or the outlet of the service regulator or service shutoff ANSI/ASME B1.20.1, Pipe Threads, General Purpose, Inch, 1983 (Reaffirmed 2006)2013. [FR No. 93-NFPA ANSI/ASME B16.1, Gray Iron Pipe Flanges and Flanged Fittings: Classes 25, 125, and 250, ANSI/ASME B16.5, Pipe Flanges and Flanged Fittings: NPS ½ through NFPS 24 Metric/Inch Standard, [FR No. 93-NFPA ANSI/ASME B16.20, Metallic Gaskets For Pipe Flanges: Ring-Joint, Spiral-Wound and Jacketed, [FR No. 93-NFPA BSR Z / First Revision NFPA Draft

2 ANSI/ASME B16.21, Nonmetallic Flat Gaskets for Pipe Flanges, ASTM E136, Standard Test Method for Behavior of Materials in a Vertical Tube Furnace at 750 o C, ANSI/ASME B16.24, Cast Copper Alloy Pipe Flanges and Flanged Fittings: Classes 150, 300, 600, 900, 1500, and 2500, ANSI/ASME B16.42, Ductile Iron Pipe Flanges and Flanged Fittings, Classes 150 and 300, ANSI/ASME B16.47, Large Diameter Steel Flanges: NPS 26 through NPS 60 Metric/Inch Standard, ANSI/ASME B36.10M, Welded and Seamless Wrought Steel Pipe, 2004 (Reaffirmed 2010)2015. [FR No. 93-NFPA ASTM International Publications. American Society for Testing and Materials International, 100 Barr Harbor Drive, West Conshohocken, PA , , ASTM A53, Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc Coated Welded and Seamless, ASTM A106, Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service, [FR No. 94-NFPA ASTM A254, Standard Specification for Copper-Brazed Steel Tubing, 1997 (Reaffirmed 2007)2012. [FR No. 94- NFPA ASTM A268, Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service, [FR No. 94-NFPA ASTM A269, Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service, [FR No. 94-NFPA ASTM A312, Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes, [FR No. 94-NFPA ASTM B88, Standard Specification for Seamless Copper Water Tube, [FR No. 94-NFPA ASTM B210, Standard Specification for Aluminum and Aluminum-Alloy Drawn Seamless Tubes, [FR No. 94-NFPA ASTM B241, Standard Specification for Aluminum and Aluminum-Alloy Seamless Pipe and Seamless Extruded Tube, [FR No. 94-NFPA ASTM B280, Standard Specification for Seamless Copper Tube for Air-Conditioning and Refrigeration Field Service, [FR No. 94-NFPA ASTM D2513, Standard Specification for Polyethylene (PE) Gas Pressure Pipe, Tubing, and Fittings, [FR No. 94-Z ] 2012a2014. [FR No. 94-NFPA ] ASTM D2513, Standard Specification for Thermoplastic Gas Pressure Pipe, Tubing, and Fittings, ASTM F1973, Standard Specification for Factory Assembled Anodeless Risers and Transition Fittings in Polyethylene (PE) and Polyamide 11 (PA11) and Polyamide 12 (PA12) Fuel Gas Distribution Systems, [FR No. 94-NFPA ASTM F2509, Standard Specification for Field-assembled Anodeless Riser Kits for Use on Outside Diameter Controlled Polyethylene Gas Distribution Pipe and Tubing, 2006 (Reaffirmed 2012). [FR No. 94-NFPA ASTM E2652, Standard Test Method for Behavior of Materials in a Tube Furnace with a Cone-shaped Airflow Stabilizer, at 750 C, CSA America Group Publications. CSA America, Inc.Group, 8501 East Pleasant Valley Road, Cleveland, OH , , [FR No. 92-NFPA ANSI/CSA NGV 5.1, Residential Fueling Appliances, [FR No. 92-NFPA ANSI LC 1/CSA 6.26, Fuel Gas Piping Systems Using Corrugated Stainless Steel Tubing (CSST), [FR No. 92-NFPA ANSI LC 4/CSA 6.32, Press-Connect Metallic Fittings for Use in Fuel Gas Distribution Systems, ANSI Z21.8, Installation of Domestic Gas Conversion Burners, 1994 (Reaffirmed ). [FR No. 92-Z ] (Reaffirmed ). [FR No. 92-NFPA ] ANSI Z , Gas-Fired Room Heaters - Volume II, Unvented Room Heaters, [FR No. 92-NFPA ANSI Z21.24/CGA 6.10, Connectors for Gas Appliances, 2006 (Reaffirmed 2011)2015. [FR No. 92-NFPA 54/Z ] ANSI Z21.41/CSA 6.9, Quick-Disconnect Devices for use with Gas Fuel Appliances, [FR No. 92-NFPA ANSI Z21.54/CSA 8.4, Gas Hose Connectors for Portable Outdoor Gas-Fired Appliances, 2002 (Reaffirmed 2007)2014. [FR No. 92-NFPA ANSI Z21.69/CSA 6.16, Connectors for Movable Gas Appliances, ANSI Z21.75/CSA 6.27, Connectors for Outdoor Gas Appliances and Manufactured Homes, 2007 (Reaffirmed 2012). [FR No. 92-NFPA ANSI Z21.80/CSA 6.22, Line Pressure Regulators, ANSI Z21.90/CSA 6/24, Gas Convenience Outlets and Optional Enclosures, 2001 (Reaffirmed 2005)2015. [FR No. 92-NFPA ANSI Z21.93/CSA 6.30, Excess flow valves for natural and LP gas with pressures up to 5 psig, BSR Z / First Revision NFPA Draft

3 ANSI Z83.4/CSA 3.7, Non-Recirculating Direct Gas-Fired Industrial Air Heaters, [FR No. 92-NFPA NFPA 90A, Standard for the Installation of Air- Conditioning and Ventilating Systems, 2015 edition. [FR No. 59-NFPA ANSI Z83.18, Recirculating Direct Gas-Fired Industrial Air Heaters, [FR No. 92-NFPA MSS Publications. Manufacturers Standardization Society of the Valve and Fittings Industry, 127 Park Street, N.E., Vienna, VA, , , [FR No. 95-NFPA ] MSS SP-6, Standard Finishes for Contact Faces of Pipe Flanges and Connecting-End Flanges of Valves and Fittings, ANSI/MSS SP-58, Pipe Hangers and Supports Materials, Design, Manufacture, Selection, Application, and Installation, UL Publications. Underwriters Laboratories Inc., 333 Pfingsten Road, Northbrook, IL , , ANSI/UL 467, Grounding and Bonding Equipment, ANSI/UL 651, Schedule 40 and 80 Rigid PVC Conduit and Fittings, 2011, Reapproved ANSI/UL 103, Chimneys, Factory-Build, Residential Type and Building Heating Appliances, 2010, Reapproved UL 378, Draft Equipment, 2006, Reapproved ANSI/UL 441, Gas Vents, 2010, Reapproved ANSI/UL 641, Type L Low-Temperature Venting Systems, 2010, Reapproved ANSI/UL 959, Medium Heat Appliance Factory-Built Chimneys, 2010, Reapproved ANSI/UL 2158A, Clothes Dryer Transition Ducts, ANSI/UL 2561, 1400 Degree Fahrenheit Factory-Built Chimneys, 2009, Reapproved [FR No. 25-NFPA U.S. Government Publication. U.S. Government Printing Office, Washington, DC 20402, Title 49, Code of Federal Regulations, Part 192. [Editoiral-2015] 2.4 References for Extracts in Mandatory Sections. NFPA 1, Fire Code, 2012 edition. [FR No. 59-NFPA ] NFPA 31, Standard for the Installation of Oil-Burning Equipment, 2011 edition. [FR No. 59-NFPA ] NFPA 70, National Electrical Code, 2011 edition. [FR No. 59-NFPA ] NFPA 88A, Standard for Parking Structures, edition. [FR No. 59-NFPA NFPA 101, Life Safety Code, 2012 edition. [FR No. 59- NFPA ] NFPA 211, Standard for Chimneys, Fireplaces, Vents, and Solid Fuel-Burning Appliances, 2010 edition. [FR No. 59- NFPA ] NFPA 501, Standard on Manufactured Housing, 2010 edition. [FR No. 59-NFPA ] NFPA 5000, Building Construction and Safety Code, 2012 edition. [FR No. 59-NFPA ] Chapter 3 Definitions {3.1 through unchanged} Gas Convenience Outlet. A permanently mounted, hand-operated device providing a means for connecting and disconnecting an appliance or an appliance connector to the gas supply piping. The device includes an integral, manually operated gas valve with a nondisplaceable valve member so that disconnection can be accomplished only when the manually operated gas valve is in the closed position. [FR No. 3-NFPA { through unchanged} Mixing Blower. A motor-driven blower to produce gas-air mixtures for combustion through one or more gas burners or nozzles on a single-zone industrial heating appliance or on each control zone of a multizone industrial appliance or on each control zone of a multizone installation. [FR No. 62-NFPA { through unchanged} Pipe. Rigid conduit of iron, steel, copper, copper alloy, aluminum, or plastic used to convey fuel gas or other fluids. [FR No. 4-NFPA { through unchanged} Plenum. A compartment or chamber to which one or more ducts are connected and that forms part of the air distribution system. [90A, 2015] [FR No. 40-NFPA { through unchanged} * Monitoring Monitor Regulator. A pressure regulator set installed in series with another a pressure regulator and that senses the same downstream pressure as the pressure regulator for the purpose of automatically taking over in an emergency the control of the pressure downstream of the regulator in case that pressure tends to exceed a set maximum preventing an overpressure in the downstream piping system when the pressure regulator fails to control the downstream pressure. [FR No. 81-NFPA { through unchanged} BSR Z / First Revision NFPA Draft

4 Safety Blowout (Backfire Preventer). A protective device located in the discharge piping of large mixing machines, incorporating a bursting disc for excessive pressure release, means for stopping a flame front, and an electric switch or other release mechanism for actuating a built-in or separate safety shutoff. [FR No. 41-NFPA (23) The piping is located in a ventilated chase or otherwise enclosed for protection against accidental gas accumulation (34) The piping is located inside buildings or separate areas of buildings used exclusively for one of the following: (a) Industrial processing or heating { through unchanged} Chapter 4 General {Chapter 4 unchanged} Chapter 5 Gas Piping System Design, Materials, and Components {5.1 through unchanged} When additional appliances are being connected to a gas piping system, the existing piping shall be checked to determine whether it has adequate capacity If inadequate, If the capacity of the system is determined to be inadequate for the additional appliances, the existing system shall be enlarged as required, or separate gas piping of adequate capacity shall be provided. [FR No. 6-NFPA {5.2 through unchanged} 5.4.3* Sizing Methods. Gas piping shall be sized in accordance with one of the following: (1) Pipe sizing tables or sizing equations in Chapter 6 (2) Other approved engineering methods acceptable to the authority having jurisdiction (3) Sizing tables included in a listed piping system manufacturer's installation instructions [FR No. 7-NFPA {5.4.4 unchanged} 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 Flammable Gas-Air Mixtures. The maximum operating pressure for piping systems for gas-air-mixtures within the flammable range shall be 10 psi (69 kpa) LP-Gas Piping Systems. The maximum operating pressure for LP-Gas piping systems shall be 20 psi (140 kpa), except as provided in (6) 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: (1)* The piping system is joints are welded or brazed. (2) The piping joints are flanged and all pipe-to-flange connections are made by welding or brazing. (b) Research (c) Warehousing (d) Boiler or mechanical rooms (45) The piping is a temporary installation for buildings under construction (56) The piping serves appliances or equipment used for agricultural purposes. (67) The piping system is an LP-Gas piping system with a design operating pressure greater than 20 psi (140 kpa) and complies with NFPA 58, Liquefied Petroleum Gas Code. [FR No. 12-NFPA Low Temperature LP-Liquefied Petroleum Gas Systems. 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. [FR No. 90-NFPA {5.6 through unchanged} Steel, Stainless Steel, and Wrought-Iron. Steel, Stainless Steel, and wrought-iron pipe shall be at least of standard weight (Schedule 40) and shall comply with one of the following standards: (1) ANSI/ASME B36.10M, Welded and Seamless Wrought Steel Pipe (2) ASTM A53, Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated Welded and Seamless (3) ASTM A106, Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service (4) ASTM A312, Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes. [FR No. 13-NFPA { through unchanged} Metallic Tubing. Seamless copper, aluminum alloy, or steel tubing Tubing shall not be used with gases corrosive to such the tubing material. [FR No. 97-NFPA { unchanged} Stainless Steel. Stainless steel tubing shall comply with one of the following: BSR Z / First Revision NFPA Draft

5 (1) ASTM A268, Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service. (2) ASTM A269, Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service. [FR No. 14-NFPA { through unchanged} [FR No. 17-NFPA { (5) through 5.8 unchanged} Where Required. A line pressure regulator shall be installed where the gas supply pressure is higher than that at which appliances are designed to operate or vary beyond design pressure limits exceeds the maximum allowable inlet pressure of the appliance served. [FR No. 21-NFPA Protective Coating. Where in contact with material or atmosphere exerting a corrosive action, metallic piping and fittings coated with a corrosion-resistant material shall be used. External or internal coatings or linings used on piping or components shall not be considered as adding strength. [FR No. 65-NFPA {5.6.7 through unchanged} * Pipe Joints. Pipe joints shall be threaded, flanged, brazed, or welded, or assembled with press-connect fittings listed to ANSI LC 4, Press-Connect Metallic Fitting for Use in Fuel Gas Distribution Systems. Where nonferrous pipe is brazed, the brazing materials shall have a melting point in excess of 1,000 F (538 C). Brazing alloys shall not contain more than 0.05 percent phosphorus. [FR No. 20-NFPA Copper Tubing Joints. Tubing Copper tubing joints shall be made assembled with approved gas tubing fittings, shall be brazed with a material having a melting point in excess of 1,000 F (538 C), or shall be made by assembled with press connect fittings complying with listed to ANSI LC 4, Press-Connect Copper and Copper Alloy. Fittings for Use in Fuel Gas Distribution Systems. Brazing alloys shall not contain more than 0.05 percent phosphorus. [FR No. 15-NFPA Stainless Steel Tubing Joints. Stainless steel joints shall be welded, assembled with approved tubing fittings, brazed with a material having a melting point in excess of 1,000 F (538 C), or assembled with press-connect fittings listed to ANSI LC 4 Press-Connect Metallic Fittings for Use in Fuel Gas Distribution Systems. Brazing alloys and fluxes shall be recommended by the manufacturer for use on stainless steel alloys. [FR No. 16-NFPA { unchanged} Metallic Pipe Fittings. Metallic fittings shall comply with the following: (1) Threaded fittings in sizes larger than 4 in. (100 mm) shall not be used. (2) Fittings used with steel, stainless steel, or wrought-iron pipe shall be steel, stainless steel, copper alloy, malleable iron, or cast iron. (3) Fittings used with copper or copper alloy pipe shall be copper, or copper alloy. (4) Fittings used with aluminum alloy pipe shall be of aluminum alloy. {5.8.2 through unchanged} Overpressure Protection Devices Pressure relieving or pressure limiting Overpressure protection devices shall be one of the following: (1) Pressure relief valve (2) Monitoring Monitor regulator (3) Series regulator installed upstream from the line regulator and set to continuously limit the pressure on the inlet of the line regulator to the maximum values specified by or less. (4) Automatic shutoff device installed in series with the line pressure regulator and set to shut off when the pressure on the downstream piping system reaches the maximum values specified by or less. This device shall be designed so that it will remain closed until manually reset The devices in shall be installed either as an integral part of the line pressure regulator or as separate units. Where separate pressure relieving or pressure limiting overpressure protection devices are installed, they shall comply with through Construction and Installation. All pressure relieving or pressure limiting overpressure protection devices shall meet the following requirements: (1) Be constructed of materials so that the operation of the device will not be impaired by corrosion of external parts by the atmosphere or of internal parts by the gas. (2) Be designed and installed so they can be operated to determine whether the valve is free. The devices shall also be designed and installed so they can be tested to determine the pressure at which they will operate and examined for leakage when in the closed position. [FR No. 22-NFPA {5.9.5 unchanged} Setting. Each pressure limiting or pressure relieving device shall be set so that the gas pressure supplied to the connected appliances does not exceed the limits specified in and [FR No. 23-NFPA {5.9.7 through unchanged} Chapter 6 Pipe Sizing {6.1 through unchanged} BSR Z / First Revision NFPA Draft

6 6.2 Tables for Sizing Natural Gas Piping Systems. Sizing of piping systems shall be in accordance with or Table 6.2.1(a) through Table 6.2.1(x) shall be used to size natural gas piping in conjunction with one of the methods described in through for piping materials other than non-corrugated stainless steel tubing Section 6.4 in conjunction with one of the methods describe in sections through for non-corrugated stainless steel tubing. [FR No. 18-NFPA {Renumber natural gas sizing tables as shown. Table entries are unchanged} Table 6.2.1(a) Table 6.2.1(b) Table 6.2.1(c) Table 6.2.1(d) Table 6.2.1(e) Table 6.2.1(f) Table 6.2.1(g) Table 6.2.1(h) Table 6.2.1(i) Table 6.2.1(j) Table 6.2.1(k) Table 6.2.1(l) Table 6.2.1(m) Table 6.2.1(n) Table 6.2.1(o) Table 6.2.1(p) Table 6.2.1(q) Table 6.2.1(r) Table 6.2.1(s) Table 6.2.1(t) Table 6.2.1(u) Table 6.2.1(v) Table 6.2.1(w) Table 6.2.1(x) [FR No. 18-NFPA 6.3 Tables for Sizing Propane Gas Piping Systems Using Propane. Sizing of piping systems shall be in accordance with one of the following: Table 6.3.1(a) through Table 6.3.1(x) shall be used to size gas piping in conjunction with one of the methods described in through for piping materials other than non-corrugated stainless steel tubing Section 6.4 in conjunction with one of the methods describe in sections through for non-corrugated stainless steel tubing. [FR No. 19-NFPA {Renumber propane sizing tables as shown. Table entries are unchanged} Table 6.3.1(a) Table 6.3.1(b) Table 6.3.1(c) Table 6.3.1(d) Table 6.3.1(e) Table 6.3.1(f) Table 6.3.1(g) Table 6.3.1(h) Table 6.3.1(i) Table 6.3.1(j) Table 6.3.1(k) Table 6.3.1(l) Table 6.3.1(m) [FR No. 19-NFPA {6.4 through unchanged} Chapter 7 Gas Piping Installation 7.1 Installation of Underground Piping Underground. [FR No. 82-NFPA {7.1.1 through unchanged} Conduit with Both Ends Terminating Indoors. Where the conduit originates and terminates within the same building, the conduit shall originate and terminate in an accessible a portion of the building and where gas leakage from the conduit would be detected by the occupants. The conduit terminations shall not be sealed. [FR No. 24-NFPA ] {7.1.7 through unchanged} CSST. CSST piping systems shall be installed in accordance with this code and the manufacturer s installation instructions. [FR No. 83-NFPA 7.2 Installation of Aboveground Piping. [FR No. 82-NFPA {7.2.1 unchanged} Protective Coating. Where piping is in contact with a material or an atmosphere corrosive to the piping system, the piping and fittings shall be coated with a corrosion-resistant material. Any such coating used on piping or components shall not be considered as adding strength to the system. [FR No. 65-NFPA {7.2.2 through unchanged} 7.8 Branch Pipe Connection. When a branch outlet is placed on a main supply line before it is known what size pipe will be connected to it, the outlet shall be of the same size as the line that supplies it. [FR No. 66-NFPA {7.9 through unchanged} 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. [FR No. 67-NFPA ] {7.9.2 through unchanged} 7.10 Prohibited Devices. No device Devices shall not be placed inside within the interior of gas piping or fittings that where such device will reduce the cross-sectional area or BSR Z / First Revision NFPA Draft

7 otherwise obstruct the free flow of gas, except where proper allowance in the piping system design has been made for such a device and where approved by the authority having jurisdiction. [FR No. 68-NFPA {7.11 through unchanged} * CSST. CSST gas piping systems and gas piping systems containing one or more segments of CSST, shall be electrically continuous and bonded to the electrical service grounding electrode system or where provided, lightning protection grounding electrode system. [FR No. 10-NFPA { through unchanged} * The length of the jumper between the connection to the gas piping system and the grounding electrode system shall not exceed 75 ft (22 m). Any additional grounding electrodes installed to meet this requirement shall be bonded to the electrical service grounding electrode system or where provided, lightning protection grounding electrode system. [FR No. 11-NFPA { through unchanged} Arc Resistant Jacketed CSST. CSST listed with an arc resistant jacket or coating system in accordance with ANSI LC 1/CSA 6.26, Fuel Gas Piping Systems Using Corrugated Stainless Steel Tubing (CSST), shall be electrically continuous and bonded to an effective ground fault current path. Where any CSST component of a piping system does not have an arc resistant jacket or coating system, the bonding requirements of shall apply. Arc resistant jacketed CSST shall be considered to be bonded when it is connected to appliances that are connected to the appliance grounding conductor of the circuit supply that appliance. [FR No. 8-NFPA { through unchagned} Chapter 8 Inspection, Testing, and Purging {8.1 through unchanged} Test Medium. The test medium shall be air, nitrogen, carbon dioxide or an inert gas. OXYGEN SHALL NEVER BE USED Oxygen shall not be used as a test medium. [FR No. 71-NFPA {8.1.3 through unchanged} Chapter 9 Appliance, Equipment and Accessory Installation {9.1 through unchanged} * Existing Appliances. Where an existing appliance is located within the conditioned space of an existing building envelope and where a building envelope component, other than roofing material, is replaced or altered, the appliance installations shall be inspected to verify compliance with the provisions of 9.3 and Chapter 12. Where the appliance installations do not comply with 9.3 and Chapter 12, it shall be altered as necessary to be in compliance with such. [FR No. 58-Z ] * Existing Appliances. Existing appliance installation 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) There 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. [FR No. 58-NFPA {9.2 through unchanged} Indoor Opening Size and Location. Openings used to connect indoor spaces shall be sized and located in accordance with the following: (1)* Combining spaces on the same story. Each opening shall have a minimum free area of 1 in. 2 /1,000 Btu/hr (2,200 mm 2 /kw) of the total input rating of all appliances in the space, but not less than 100 in. 2 (0.06 m 2 ). One permanent opening shall commence within 12 in. (300 mm) of the top of the enclosure, and one permanent opening shall commence within 12 in. (300 mm) of the bottom, of the enclosure. The minimum dimension of air openings shall be not less than 3 in. (80 mm). (2) Combining spaces in different stories. The volumes of spaces in different stories shall be considered as communicating spaces where such spaces are connected by one or more permanent openings in doors or floors having a total minimum free area of 2 in. 2 /1,000 Btu/hr (4,400 mm 2 /kw) of total input rating of appliances. [FR No. 73-NFPA {9.3.3 through 9.6 unchanged} Connecting Appliances and Equipment. Appliances and equipment shall be connected to the building piping in compliance with through by one of the following: (1) Rigid metallic pipe and fittings (2) Semirigid metallic tubing and metallic fittings. Aluminum alloy tubing shall not be used in exterior locations. BSR Z / First Revision NFPA Draft

8 (3) Listed connector in compliance with ANSI Z21.24/ CGA 6.10, Connectors for Gas Appliances. The connector shall be used in accordance with the manufacturer s installation instructions, and shall be in the same room as the appliance. Only one connector shall be used per appliance. (4) A listed connector in compliance with ANSI Z21.75/CSA 6.27, Connectors for Outdoor Gas Appliances and Manufactured Homes. Only one connector shall be used per appliance. (5) CSST where installed in accordance with the manufacturer's installation instructions. CSST shall connect only to appliances that are fixed in place. (6) Listed nonmetallic gas hose connectors in accordance with (7) Unlisted gas hose connectors for use in laboratories and educational facilities in accordance with [FR No. 55-NFPA ] { through unchanged} The shutoff valve shall be located within 6 ft (1.8 m) of the appliance it serves except as permitted in or (1) Where a connector is used, the valve shall be installed upstream of the connector. A union or flanged connection shall be provided downstream from the valve to permit removal of appliance controls. (2) Shutoff valves serving decorative gas appliances in a fireplace shall be permitted to be installed in fireplaces if not be located within the fireplace firebox except where the valve is listed for such use. [FR No. 43-NFPA { unchanged} 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. [FR No. 44-NFPA {9.6.6 through unchanged} Figure Method of installing a tee fitting sediment trap. 3 in. (80 mm) or 3 pipe diameter minimum [FR No. 74-NFPA {9.6.9 through unchanged} Chapter 10 Installation of Specific Appliances {10.1 through unchanged} 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 2159A, Clothes Dryer Transition Ducts, for that application or and installed in accordance with the clothes dryer manufacturer's installation instructions. [FR No. 48-NFPA { through unchanged} Non-recirculating direct gas-fired industrial air heaters shall be installed only in industrial or commercial occupancies. [FR No. 75-NFPA { through unchanged} Installation. Installation of direct gas-fired industrial air heaters shall comply with the following requirements: (1) Recirculating direct gas-fired industrial air heaters shall be installed in accordance with the manufacturer's instructions. (2) Recirculating direct gas-fired industrial air heaters shall be installed only in industrial or commercial occupancies. [FR No. 76-NFPA { through unchanged} 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. [FR No. 49-NFPA { through unchanged} Floor-Mounted-Type Unit Heaters. Floormounted-type unit heaters shall comply with the following requirements: (1) A listed unit heater shall be installed with clearances from combustible material at the back and one side only of not less than 6 in. (150 mm). Where the flue gases are vented BSR Z / First Revision NFPA Draft

9 horizontally, the 6 in. (150 mm) clearance shall be measured from the draft hood or vent instead of the rear wall of the unit heater. A unit heater listed for reduced clearances shall be installed in accordance with the manufacturer s installation instructions. (2) Floor-mounted-type unit heaters installed on combustible floors shall be listed for such installation. (3) Combustible floors under unlisted floor-mounted unit heaters shall be protected in an approved manner. (4) Clearances for servicing shall be in accordance with the manufacturers recommendations contained in the installation instructions. [FR No. 56-NFPA { through unchanged} Locations with Air-Handlers. Where a draft hood equipped water heater is installed in a space containing a furnace or other air-handler, the ducts serving the furnace or air-handler shall comply with Section [FR No. 51-NFPA { through unchanged} Compressed Natural Gas (CNG) Vehicular Fuel Systems. The installation of compressed natural gas (CNG) fueling (dispensing) systems shall conform with NFPA 52, Vehicular Fuel Systems Code. Residential CNG fueling appliances shall be listed in accordance with ANSI/CSA NGV 5.1, Residential Fueling Appliances, and installed in accordance to the appliance manufacturer s installation instructions. [FR No. 52-NFPA {10.29 through unchanged} Chapter 11 Procedures to Be Followed to Place Appliance in Operation {11.1 through unchanged} I Input rate shall be determined by either one of the following: (1) Checking burner input by using a gas meter. (2) Checking burner input by using orifice manifold pressure drop and orifice size. [FR No. 57-NFPA { through 11.7 unchanged} Chapter 12 Venting of Appliances {12.1 through unchanged} Appliances Not Required to be Vented. The following appliances shall not be required to be vented. (1) Listed ranges (2) Built-in domestic cooking units listed and marked for optional venting (3) Listed hot plates and listed laundry stoves [FR No. 77-NFPA { (4) through unchanged} * Ventilating Hoods. Ventilating The use of ventilating hoods and exhaust systems to vent appliances shall be permitted to be used to vent appliances limited to industrial appliances and appliances installed in commercial applications and to vent industrial appliances, particularly where the process itself requires fume disposal. [FR No. 26-NFPA Well-Ventilated Spaces. The operation of flue gases from industrial-type appliances such that its flue shall not be required to be vented to the outdoors where such gases are discharged directly into a large and well-ventilated industrial space shall be permitted. [FR No. 27-NFPA { through unchanged} Mechanical draft systems shall be listed in accordance with UL 378, Draft Equipment, and shall be installed in accordance with both the appliance and the mechanical draft system manufacturer s installation instructions. [FR No. 28-NFPA { through unchanged} Ventilating hoods and exhaust systems shall be permitted to be used to vent appliances installed in commercial applications. [FR No. 29-NFPA { through unchanged} 12.6 Masonry, Metal, and Factory-Built Chimneys Listing or Construction Factory-built chimneys shall be listed in accordance with ANSI/UL 103, Chimneys, Factory-Built, Residential Type and Building Heating Appliances, ANSI/UL 959, Medium Heat Appliance Factory-Built Chimneys, or ANSI/UL 2561, 1400 Degree Fahrenheit Factory-Built Chimneys. Factory-built chimneys shall be installed in accordance with the manufacturer s installation instructions. Factory-built chimneys used to vent appliances that operate at positive vent pressure shall be listed for such application. [FR No. 31-NFPA { through unchanged} Cleanouts shall be examined to determine that they will and where they do not remain tightly closed when not in use they shall be repaired or replaced. [FR No. 33-NFPA { through unchanged} A single chimney flue serving a listed combination gas- and oil-burning appliance shall be sized to properly vent in accordance with the appliance manufacturer s insturctions. [FR No. 34-NFPA BSR Z / First Revision NFPA Draft

10 { through unchanged} Installation Shield. Where a factory-built chimney passes through insulated assemblies, an insulation shield constructed of steel having a minimum thickness of inch ( mm) (nominal 26 gage) shall be installed to provide clearance between the chimney and the insulation material. The clearance shall not be less than the clearance to combustibles specified by the chimney manufacturer s installation instructions. Where chimneys pass through attic space, the shield shall terminate not less than 2 inches (51 mm) above the installation materials and shall be secured in place to prevent displacement. Insulation shields provided as part of a listed chimney system shall be installed in accordance with the manufacturer s installation instructions. [FR No. 32-NFPA 12.7 Gas Vents Materials. Type B and Type BW gas vents shall be listed in accordance with ANSI/UL 441, Gas Vents. Vents for listed combination gas- and oil-burning appliances shall be listed in accordance with ANSI/UL 641, Type L Low Temperature Venting Systems. [FR No. 35-NFPA { through unchanged} Size of Gas Vents. Venting systems shall be sized and constructed in accordance with Chapter 13 or other approved engineering methods and the gas vent and appliance manufacturers sections through and the appliances manufacturer s instructions. [FR No. 36-NFPA { through unchanged} The vent terminal of a direct-vent appliance with an input of 10,000 Btu/hr (3 kw) or less shall be located at least 6 in. (150 mm) from any air opening into a building, and such an appliance with an input over 10,000 Btu/hr (3 kw) but not over 50,000 Btu/hr (14.7 kw) shall be installed with a 9 in. (230 mm) vent termination clearance, and an appliance with an input over 50,000 Btu/hr (14.7 kw) shall be at least a 12 in. (300 mm) vent termination clearance. The clearances for through-the-wall direct vent terminals shall be in accordance with Table The bottom of the vent terminal and the air intake shall be located at least not less than 12 in. (300 mm) above finished ground level. [FR No. 84-NFPA Table Through-the-Wall Direct Vent Termination Clearances Direct vent appliance input rating (Btu/hr) Through-the-wall vent terminal clearance from any air opening into the building (in.) 10,000 6 > 10,000 50,000 9 > 50, , > 150,000 For SI units: 1 in. = 25.4 mm, 1 Btu/hr = W [FR No. 84-NFPA In accordance with the appliance manufacturer s instructions and in no case less than the clearances specified in { through unchanged} Chapter 13 Sizing of Category I Venting Systems 13.1 Additional Requirements to Single Appliance Vent Table 13.1(a) Through Table 13.1(f). This section shall apply where Tables 13.1(a) through 13.1(f) are used to size single appliance venting systems. Sections through apply to tables 13.1(a) through 13.1(f). [FR No. 38-NFPA { through unchanged} 13.2 Additional Requirements to Multiple Appliance Vent Table 13.2(a) Through Table 13.2(i). This section shall apply where Tables 13.2(a) through 13.2(i) are used to size single appliance venting systems. Sections through apply to tables 13.2(a) through 13.2(i). [FR No. 39-NFPA { through unchanged Annex A Explanatory Material {A (A) unchanged} A Approved. The American Gas Association, American National Standards Institute, and the National Fire Protection Association do not approve, inspect, or certify any installations, procedures, appliances, equipment, or materials; nor do they approve or evaluate testing laboratories. In determining the acceptability of installations, procedures, appliances, equipment, or materials, the authority having jurisdiction may base acceptance on compliance with AGA, ANSI, CSA or NFPA, or other appropriate standards. In the absence of such standards, said authority may require evidence of proper installation, procedure, or use. The authority having jurisdiction may also refer to the listings or labeling practices (see 3.2.4) of an organization that is concerned with product evaluations and is thus in a position to determine compliance with appropriate standards for the current production of listed items. Additional information regarding the coordination of appliance design, construction, and maintenance can be found in Annex B. [FR No. 86-NFPA ] {A through A unchanged} A A monitor regulator is part of a 2-regulator set in which one regulator is doing the work (the working regulator) and in which the second regulator (the monitor) is installed to back up the working regulator should it fail. The monitor regulator remains in a nearly-full-open position until it senses a rise in the downstream pressure. Each regulator senses the BSR Z / First Revision NFPA Draft

11 same downstream pressure, which allows either regulator to limit that downstream pressure. [FR No. 81-NFPA {A through A unchanged} A 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. [FR No. 11-NFPA {A unchanged} A NFPA 780, Standard for the Installation of Lightning Protection Systems, Section 4.14, requires that all grounding media including underground metallic piping systems be interconnected to provide a common ground potential. These underground piping systems are not permitted to be substituted for grounding electrodes but must be bonded to the lightning protection grounding system. Where galvanic corrosion is of concern, the bond may be can made via a spark gap or gas discharge tube. [FR No. 69-NFPA ] {A through A unchanged} (a) To an appropriate checkpoint, 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. (b) Attach an in-line flow meter between the meter outlet and piping system inlet prior to the fist regulaor in the piping system. Slowly turn on the gas supply and observe the metering device. If flow does not drop to zero, leakage is indicated. [FR No. 79-NFPA {C.3 (2) unchanged} C.4 When Leakage is Indicated. If the meter test hand moves or a pressure drop on the gauge is noted leakage is indicated by a test device, all appliances and equipment or outlets supplied through the system should be examined to see if they are shut off and do not leak. If they are found tight, there is a leak in the piping system. [FR No. 80-NFPA A Building envelope changes made under weatherization practices intended to reduce air infiltration and contractor activities such as the replacement of whole windows and exterior doors, crack sealing and the installation of air barriers and extensive exterior modifications, will reduce the amount of infiltration air and could impact the amount of combustion air that is available for existing appliance installations. Proper vent sizing and configuration is crucial to maintaining the required vent performance in structures that have reduced air infiltration. [FR No. 46-Z ] A Building envelope changes made under weatherization practices intended to reduce air infiltration and contractor activities such as the replacement of whole windows and exterior doors, and extensive exterior modifications, will reduce the amount of infiltration air and could impact the amount of combustion air that is available for existing appliance installations. Proper vent sizing and configuration is crucial to maintaining the required vent performance in structures that have reduced air infiltration. [FR No. 46-NFPA ] {A.9.3 through A unchanged} Annex B Sizing and Capacities of Gas Piping {Annex B unchanged} 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. Annex D Suggested Emergency Procedure for Gas Leaks {Annex D unchanged} Annex E Flow of Gas through Fixed Orifices {Annex E unchanged} Annex F Sizing of Venting Systems Serving Appliances Equipped with Draft Hoods, Category I Appliances, and Appliances Listed for Use with Type B Vents {Figure F.1(a) through F.2.4 Example 5(c) unchanged} {Figure F.2.4 unchanged} 99% Winter Design Temperatures for the Contiguous United States This map is a necessarily generalized guide to temperatures in the contiguous United States. Temperatures shown for areas such as mountainous regions and large urban centers are not necessarily accurate. The climate data used to develop this map are from the 1993 ASHRAE Handbook Fundamentals (Chapter 24, Table 1: cclimate Conditions for the United States). For 99% winter design temperature in Alaska, consult the ASHRAE Handbook Fundamentals. 99% winter design temperature for Hawaii are greater than 37 o F. [FR No. 89-NFPA Annex G Recommended Procedure for Safety Inspection of an Existing Appliance Installation {G.1 through G.6 unchanged} BSR Z / First Revision NFPA Draft

12 Appliance Central Furnace (all categories) Floor Furnace Gravity Furnace Wall Furnace (BIV) Wall Furnace (Direct Vent) Vented Room Heater Vent-Free Room Heater Boilers (all categories) Water Heater Oven / Broiler Top Burner Clothes Dryer Refrigerator Gas Log (gas fireplace) Gas Log (installed in wood burning fireplace) TABLE G.6 CO Thresholds Threshold Limit 400 ppm 1 air free 2,3 400 ppm air free 400 ppm air free 200 ppm air free 400 ppm air free 200 ppm air free 200 ppm air free 400 ppm air free 200 ppm air free 225 ppm as measured 25 ppm as measured (per burner) 400 ppm air free 25 ppm as measured 25 ppm as measured in vent 400 ppm air free in firebox {Table notes and equations unchanged} [FR No. 53-NFPA K.1.2 Annex H Indoor Combustion Air Calculation Examples {Annex H unchanged} Annex I Example of Combination of Indoor and Outdoor Combustion and Ventilation Opening Design. {Annex I unchanged} Annex J Enforcement {Annex J unchanged} Annex K Informational Publications {K.1 through K.1.1 unchanged} Other Publications K API Publication. American Petroleum Institute, 1220 L Street, NW, Washington, DC , , API 1104, Welding Pipelines and Related Facilities, 2008 (Reaffirmed 2010)2013. [FR No. 85-NFPA K ASHRAE Publications. American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., 1791 Tullie Circle, N.E., Atlanta, GA , , ASHRAE Handbook Fundamentals, [FR No. 85-NFPA ASHRAE Handbook HVAC Systems and Equipment, K ASME International Publications. American Society of Mechanical Engineers International, ThreeTwo Park Avenue, New York, NY , , ASME Boiler and Pressure Vessel Code, Section IX and Section IV, [FR No. 85-NFPA ANSI/ASME B1.20.1, Pipe Threads, General Purpose, Inch, 1983 (Reaffirmed 2006). ANSI/ASME B36.10M, Welded and Seamless Wrought Steel Pipe, 2004 (Reaffirmed 2010)2015. [FR No. 85-NFPA K ASTM International Publications. American Society for Testing and Materials International, 100 Barr Harbor Drive, West Conshohocken, PA , , ASTM A53, Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc Coated Welded and Seamless, ASTM A106, Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service, [FR No. 85-NFPA ASTM A254, Standard Specification for Copper-Brazed Steel Tubing, 1997 (Reaffirmed 2007)2012. [FR No. 85- NFPA ASTM A539, Standard Specification for Electric- Resistance-Welded Coiled Steel Tubing for Gas and Fuel Oil Lines, ASTM B88, Standard Specification for Seamless Copper Water Tube, [FR No. 85-NFPA ASTM B210, Standard Specification for Aluminum and Aluminum-Alloy Drawn Seamless Tubes, [FR No. 85-NFPA ASTM B241, Standard Specification for Aluminum and Aluminum-Alloy Seamless Pipe and Seamless Extruded Tube, [FR No. 85-NFPA ASTM B280, Standard Specification for Seamless Copper Tube for Air-Conditioning and Refrigeration Field Service, [FR No. 85-NFPA ASTM D2385, Test Method for Hydrogen Sulfide and Mercaptan Sulfur in Natural Gas (Cadmium Sulfate Iodometric Titration Method), 1981 (Reaffirmed 1990) (Withdrawn 1995). [FR No. 85-NFPA ASTM D2420, Method of Test for Hydrogen Sulfide in Liquefied Petroleum (LP) Gases (Lead Acetate Method), [FR No. 85-NFPA BSR Z / First Revision NFPA Draft