Ch 12 - Fuel Gas Piping Flashcards
Fill in the blank
After the installation, alteration, or repair of any gas piping, and before it is used _____.
Notify Authority Having Jurisdiction of readiness for inspection
Upon completion of the installation, alteration, or repair of gas piping, and prior to the use thereof, the Authority Having Jurisdiction shall be notified that such gas piping is ready for inspection.
2024 UPC- 1203.1 Inspection Notification.
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Gas piping plans must show location of piping, size of branches, load demands, and _____.
Point of delivery
Where required by the Authority Having Jurisdiction, a piping sketch or plan shall be prepared before proceeding with the installation. The plan shall show the proposed location of piping, the size of different branches, the various load demands, and the location of the point of delivery. [NFPA 54:5.1.1] (NFPA 54: National Fuel Gas Code)
2024 UPC- 1208.2 Installation of Piping System.
Gas piping should never be made of which material?
Cast-iron
Cast-iron pipe shall not be used. [NFPA 54:5.5.2.1] (NFPA 54: National Fuel Gas Code)
2024 UPC- 1208.5.2.1 Cast Iron.
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Copper and copper alloy pipe shall not be used if the gas contains more than an average of 0.3 grains of _____ per 100 SCF of gas.
Hydrogen sulfide
Copper and copper alloy pipe shall not be used if the gas contains more than an average of 0.3 grains of hydrogen sulfide per 100 standard cubic feet (scf) of gas (0.7 mg/100 L). Threaded copper, copper alloy, or aluminum alloy pipe shall not be used with gases corrosive to such material. [NFPA 54:5.5.2.3 - 5.5.2.4] (NFPA 54: National Fuel Gas Code)
2024 UPC- 1208.5.2.3 Copper and Copper Alloy Pipe.
Fill in the blank
Defective pipe, tubing, and fittings shall be _____.
Replaced
Gas pipe, tubing, and fittings shall be clear and free from cutting burrs and defects in structure or threading and shall be thoroughly brushed and chip and scale blown. Defects in pipe, tubing, and fittings shall not be repaired. Defective pipe, tubing, and fittings shall be replaced. [NFPA 54:5.5.5] (NFPA 54: National Fuel Gas Code)
2024 UPC- 1208.5.7 Workmanship and Defects.
Fill in the blank
Brazing alloys for nonferrous pipe for fuel gas may not be more than _____ phosphorus.
0.05 percent
Schedule 40 and heavier pipe joints shall be threaded, flanged, brazed, welded, or assembled with press-connect fittings listed to ANSI LC 4/CSA 6.32. (1) Where nonferrous pipe is brazed, the brazing materials shall have a melting point in excess of 1000蚌 (538蚓). (2) Brazing alloys shall not contain more than 0.05 percent phosphorus. [NFPA 54:5.6.8.1] (NFPA 54: National Fuel Gas Code)
2024 UPC- 1208.5.9.1 Pipe Joints.
Fill in the blank
Gas meters shall not be placed where subjected to _____.
Damage
Gas meters shall not be placed where they will be subjected to damage, such as adjacent to a driveway, under a fire escape, in public passages, halls, or where they will be subject to excessive corrosion or vibration. [NFPA 54:5.6.2.2] (NFPA 54: National Fuel Gas Code)
2024 UPC- 1208.7.1.1 Protection from Damage.
Fill in the blank
Underground piping systems shall be installed within a minimum of _____ inches of cover.
12 inches
Underground piping systems shall be installed with a minimum of 12 inches (305 mm) of cover. The minimum cover shall be increased to 18 inches (457 mm) if external damage to the pipe or tubing from external forces is likely to result. Where a minimum of 12 inches (305 mm) of cover cannot be provided, the piping shall be installed in conduit. [NFPA 54:7.1.2.1 - 7.1.2.1(B)] (NFPA 54: National Fuel Gas Code)
2024 UPC- 1210.1.1 Cover Requirements.
Fill in the blank
Plastic gas piping shall installed outside, _____ only.
Underground
Plastic piping shall be installed outdoors, underground only. Exceptions: (1) Plastic piping shall be permitted to terminate above ground where an anode-less riser is used. (2) Plastic piping shall be permitted to terminate with a wall head adapter aboveground in buildings, including basements, where the plastic piping is inserted in a piping material permitted for use in buildings. [NFPA 54:7.1.7.1] (NFPA 54: National Fuel Gas Code)
2024 UPC- 1210.1.7 Connection of Plastic Piping.
Fill in the blank
Piping installed above ground shall be securely supported and located where it will be protected from physical _____.
Damage
Piping installed aboveground shall comply with all of the following: (1) Piping shall be securely supported and located where it will be protected from physical damage.
2024 UPC- 1210.3 Installation of Aboveground Piping.
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Indoor gas hose connectors shall not exceed _____ feet.
6 feet
(2) The connector shall be of minimum length and shall not exceed 6 feet (1829 mm)
2024 UPC- 1212.3 Use of Nonmetallic Gas Hose Connectors. 2024 UPC- 1212.3.1 Indoor.
Fill in the blank
Shutoff valves serving decorative gas appliances shall be _____ to be installed in fireplaces if listed for such use.
Permitted
Each appliance connected to a piping system shall have an accessible, approved manual shutoff valve with a nondisplaceable valve member, or a listed gas convenience outlet. Appliance shutoff valves and convenience outlets shall serve a single appliance only. [NFPA 54:9.6.5] The shutoff valve shall be located within 6 feet (1829 mm) of the appliance it serves. [NFPA 54:9.6.5.1] 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. [NFPA 54:9.6.5.1(A)] (NFPA 54: National Fuel Gas Code)
2024 UPC- 1212.6 Appliance Shutoff Valves and Connections.
True or False
All natural gas regulations and tables are based on the use of gas having a specific gravity of 0.60.
TRUE
The following regulations shall comply with this section and Section 1215.0, shall be the standard for the installation of gas piping. Natural gas regulations and tables are based on the use of a gas having a specific gravity of 0.60 and for undiluted liquefied petroleum gas, having a specific gravity of 1.50. Where gas of a different specific gravity is to be delivered, the specific gravity conversion factors provided by the serving gas supplier shall be used in sizing piping systems from the pipe sizing tables in this chapter.
2024 UPC- 1214.0 Required Gas Supply. 2024 UPC- 1214.1 General.
How do you know what the local BTU per cubic foot is, in any area?
Ask the gas supplier
Where the gas appliances to be installed have not been specified, Table 1208.4.1 shall be permitted to be used as a reference to estimate requirements of typical appliances. To obtain the cubic feet per hour (m3/h) of gas required, divide the input of the appliances by the average Btu (kWoh) heating value per cubic foot (m3) of the gas. The average Btu (kWoh) per cubic foot (m3) of the gas in the area of the installation shall be permitted to be obtained from the serving gas supplier.
2024 UPC- 1214.3 Gas Appliances.
Fill in the blank
The size of the supply piping outlet for any gas appliance shall not be less than _____ inch.
1/2 inch
The size of the supply piping outlet for a gas appliance shall be not less than 1/2 of an inch in diameter (15 mm). The size of a piping outlet for a mobile home shall be not less than3/4 of an inch in diameter (20 mm).
2024 UPC- 1214.4 Size of Piping Outlets.
