Innovation. Fuel lines are the respon-sibility of the customer. It will cover both the longest length method and the branch length method. Gas Main or Main Extension: The piping system owned by the company that is used for the distribution of gas Applicable code tables, figures and example problems and solutions are provided for each method to help the reader easily understand the pipe sizing methodology. National Fuel Gas Code, NFPA Standard 54 ANSI Z223.1 Standard for the Installation of Oil-Burning Equipment 2006 Edition, NFPA31 American Society of Heating, Refrigerating and Air Conditioning Handbook, Equipment International Mechanical Code The capacities given in the Tables for Type B Gas Venting are consistent with those found in In the absence of local codes, installation must be in accordance with the current edition of National Fuel Gas Code, ANSI Z223.1/ NFPA 54, the National Standard of Canada, Natural Gas and Propane Installation Code, CSA B149.1, the Uniform Plumbing Code, the International Fuel Gas Code, the Federal Manufactured Home Construction and the local code. History of Fuel Gas Code Development. NFPA 54, National Fuel Gas Code, is the American National Standard (ANSI Z223.1) that applies to the installation of fuel gas piping systems, equipment, and appliances that are supplied with natural gas, manufactured gas, liquefied petroleum gas (LP-Gas) in the vapor phase only, LP-Gas–air Consult your local gas supplier or the National Fuel Gas Code in regards to these type systems. Natural Gas Pipe Sizing Chart Length of Pipe 1/2"In Feet Size of Pipe in Inches 3/4" 1" 1-1/4" 2" 2-1/2" 3" 4" 10 108 230 387 793 1237 2259 3640 6434 20 75 160 280 569 877 1610 2613 5236 9521 30 61 129 224 471 719 1335 2165 4107 7859 40 52 110 196 401 635 1143 1867 3258 6795 50 46 98 177 364 560 1041 1680 2936 6142 60 42 89 159 336 513 957 1559 2684 5647 70 38 … There are two basic pipe sizing methods: longest length and branch length. The National Fuel Gas Code (NFPA 54) is the oldest fuel gas code in the United States. If the vent size determined from the table is smaller than the appliance draft hood outlet or flue Fuel Gas Code ® (IFGC ®) and 2015 International Residential Code (IRC®). The installation of vents serving listed appliances with vent dampers shall be in accordance with the appliance manufacturer's instructions. The attached specifications are a PGW supplement to both Fuel Gas Codes. end of this section (from section 7.15, National Fuel Gas Code, 1996), are installed in the venting system. Pipe Sizing Methods. Before 1974, the contents of NFPA 54 appeared in several other documents; in 1974, they were combined into one document. A.1 General piping considerations. The International Fuel Gas Code is the standard for the installation of fuel gas piping and equipment. The 2015 Edition of the National Fuel Gas Code, ANSI Z223.1/NFPA 54 was approved on September 3, 2014. What Does It Address •NFPA 54 The 2015 edition include significant revisions including. The National Fuel Gas Code is the standard for any issues not addressed in the International Fuel Gas Code. Hybrid pressure systems, with a 2 psi static pressure with regulators at each appliance, are sized differently than in this example. APPENDIX A SIZING AND CAPACITIES OF GAS PIPING (Not Adopted by the State of Oregon) (This appendix is informative and is not part of the code.This appendix is an excerpt from the 2009 International Fuel Gas Code, coordinated with the section numbering of the International Residential Code.) Fuel Line: The piping that is installed after the company’s meter or regulator that connects the customer’s appliances and equipment to the gas supply. In some cases these specifications differ from the standards. •Examine gas piping size and safety •Simplify design rules •Selection of table(s) for sizing of venting ... Fire Protection Association –Over 300 on Laundry List of Codes •NFPA 70 –Better know as NEC (National Electric Code) •NFPA 54 –National Fuel Gas Code 3. APPENDIX A: SIZING & CAPACITIES of GAS PIPING [PDF] as adopted in the U.S. by Virginia's adoption of the the IFGS and the National Fuel Gas Code will provide details of the information you need for an actual, safe answer to your gas piping questions. In 1980, portions of the ASME B31.2 piping code were included. Experience. Results.