Questar Gas - Good Practices for Gas Piping and Appliance ...

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c. Category III - An appliance which operates with a positive vent pressure and with a vent gas temperature that avoids excessive condensate production in the vent. d. Category IV - An appliance which operates with a positive vent pressure and with a vent gas temperature that is capable of causing excessive condensate production in the vent. VENTILATION AIR - Enough air to ventilate appliances to within safe operating temperature. WATER HEATER - a. Automatic Instantaneous: The type which heats the water as it is drawn. b. Automatic Storage: The type which combines a water heating element and water storage tank, gas to the main burner being controlled by a thermostat. c. Circulating or Tank: Manually controlled type usually connected to the ordinary hot water tank. 25
SECTION III GAS PIPING INSTALLATION 1. METER LOCATIONS: Questar Gas Company determines the location of its meters. Meters should be set outside for easy accessibility and service. Meters should not be set under roof valleys or other places where excessive amounts of water, snow or ice would drip from the roof onto the meter set and freeze. Ice and snow protection is required. Remote meter sets are discouraged. Meters, when set inside, will be installed immediately adjacent to and in the same room where the gas service line enters the building. Meters will be placed where they will be easily accessible, not exposed to extreme heat sources and located at least 3 feet from any ignition source. Meters are to be located in ventilated spaces accessible for examination, reading, replacement and maintenance. Questar Gas recommends the service line riser, meter and regulator should be located 3 feet away from any permanent air intake into the building. 2. METER/RISER PROTECTION - Meter/Riser locations not requiring protection are preferred. If a customer insists on a location where damage to the meter is likely, meter protection will be required at the customer’s expense. Locations of specific concern are described as follows: service line risers on the driveway side of a structure where there is not at least 5 feet from the driveway to the building, proximity to roadways, alleyways, parking lots, dock areas, garage areas, and any other areas where vehicle accessibility would warrant a barrier. 26
Page 1 and 2: Questar Gas Company Good Practices
Page 3 and 4: 59060 05/24/11
Page 5 and 6: SECTION I - GENERAL CONTENTS Paragr
Page 7 and 8: SECTION VI - VENTING Paragraph Page
Page 9 and 10: TABLES AND FIGURES Table Page No. I
Page 11 and 12: GENERAL SAFETY PRECAUTIONS Before l
Page 13 and 14: AUTOMATIC PILOT - Consists of an au
Page 15 and 16: gas vents, chimneys, steam and hot
Page 17 and 18: EXCESS AIR - Air which passes throu
Page 19 and 20: HAZARDOUS LOCATION - Any location c
Page 21 and 22: MP - Medium pressure - 1.5 psi - 60
Page 23 and 24: 4) Division 3. Mental hospitals, me
Page 25 and 26: SECONDARY AIR - The air externally
Page 27: c. Type “C” Gas Vents: Unlisted
Page 31 and 32: MULTIPLE METER SET FIGURE 2 For com
Page 33 and 34: connects underground to plastic pip
Page 35 and 36: 1/2" 6 feet 3/4" or 1" 8 feet 1 1/4
Page 37 and 38: Gas outlets for a barbecue shall ha
Page 39 and 40: After meter spot test determines th
Page 41 and 42: 17. REQUIRED GAS PIPING SIZE: When
Page 43 and 44: (2) The length of pipe from the gas
Page 45 and 46: MAXIMUM CAPACITY OF PIPE IN CUBIC F
Page 47 and 48: CORREGATED STAINLESS STEEL TUBING (
Page 49 and 50: SECTION IV APPLIANCE INSTALLATION 1
Page 51 and 52: (b) Appliances located in garages a
Page 53 and 54: 12 inches at the bottom and 6 inche
Page 55 and 56: temperature of the potable distribu
Page 57 and 58: SECTION V COMBUSTION AND VENTILATIO
Page 59 and 60: (j) When combustion air is taken fr
Page 61 and 62: The air supply for gas appliances m
Page 63 and 64: the enclosure. The openings shall c
Page 65 and 66: EQUIPMENT LOCATED IN CONFINED SPACE
Page 67 and 68: EQUIPMENT LOCATED IN CONFINED SPACE
Page 69 and 70: Galvanized steel vent or aluminized
Page 71 and 72: facilitate removal of the connector
Page 73 and 74: Two or more connectors shall not en
Page 75 and 76: 11. GAS VENT TERMINATION: Vents sha
Page 77 and 78: not less than 9 inches from any ope
Page 79 and 80:
76 TABLE 1 DOUBLE WALL COMMON VENT
Page 81 and 82:
TABLE 3 Category 1 Vent Tables DOUB
Page 83 and 84:
SECTION VII CONTROLS AND REGULATORS
Page 85 and 86:
5. VENTING FOR DIAPHRAGM TYPE VALVE
Page 87 and 88:
SECTION VIII PROCEDURES TO BE FOLLO
Page 89 and 90:
smaller test dials (1/4 and 1/2) al
Page 91 and 92:
CENTER STANDARD DERATION FACTORS DE
Page 93 and 94:
CENTER STANDARD DERATION FACTORS DE
Page 95 and 96:
8. PROTECTIVE DEVICES: All protecti
Page 97 and 98:
CONVERSION OF INCHES OF WATER COLUM
Page 99 and 100:
SECONDS FOR ONE REVOLUTION AT FOUR
Page 101 and 102:
Page 103 and 104:
Page 105 and 106:
ORIFICE CAPACITIES ................
Page 107 and 108:
Page 109 and 110:
Page 111 and 112:
Page 113 and 114:
SECTION IX MANUFACTURED HOME (MOBIL
Page 115 and 116:
3. RECREATION VEHICLE: A vehicular
Page 117 and 118:
CROSSOVER for a MANUFACTURED HOME E
Page 119 and 120:
(2) The installation of appliances
Page 121 and 122:
Combustion Air for Industrial: BTUs
Page 123 and 124:
INDEX Page ( ) REPRESENTS THE DEFIN
Page 125 and 126:
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Questar Gas - Good Practices for Gas Piping and Appliance ...

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