Filter
Top Products
GAS KETTLES
— 7 —
Gas Connection Data
FLEXIBLE GAS CONNECTORS BTU/hr. FLOW CAPACITY
1, 2
LENGTH
3
LENGTH
3
End Fittings - (1) Quick Disconnect
& (1)
Threaded
End Fittings - Both Threaded
ID 36" 48" 60" 72" 36" 48" 60" 72"
1
/2"
77,000 68,000 60,000 55,000 120,000 106,000 93,000 86,000
3
/4"
218,000 180,000 158,000 139,000 256,000 225,000 198,000 175,000
1"
379,000 334,000 294,000 279,000 512,000 451,000 397,000 350,000
1
1
/4"
615,000 541,000 476,000 419,000 946,000 833,000 733,000 645,000
1. Flow rating BTU/hr. 0.64 SP. GR @ 0.5 inch W.C. pressure drop.
2. BTU/hr. flow capacities are based on Dormont Mfg. Co. Supr-Safe gas line connectors and
are
provided
for
reference. Additional quick disconnect fi
ttings,
swivels, or manual shut
off
valves
will
reduce the BTU/hr. flow capacities listed in this table. If other flexible gas connectors are
used,
check the manufacturer’s specifications for BTU/hr. flow capacities. Supr-Safe is a
registered
trademark of the Dormont Manufacturing Company.
3. The maximum length for a flexible gas connector is 72" per National Fuel Code standards.
BLACK IRON PIPE BTU/hr. FLOW CAPACITY
1, 2, 3
Natural Gas Nominal Inside Diameter of Pipe
Pipe Length
1
/
2"
3
/
4" 1" 1
1
/
4" 1
1
/
2" 2"
15'
76,000 172,000 345,000 750,000 1,220,000 2,480,000
30'
52,000 120,000 241,000 535,000 850,000 1,780,000
45'
43,000 99,000 199,000 435,000 700,000 1,475,000
60'
38,000 86,000 173,000 380,000 610,000 1,290,000
75'
77,000 155,000 345,000 545,000 1,120,000
90'
70,000 141,000 310,000 490,000 1,000,000
1. Flow rating BTU/hr. 0.64 SP. GR @ 0.3 inch W.C. pressure drop.
2.
BTU/hr.
flow capacities are based on Schedule 40 pipe, include a tolerance for pressure losses
in gas piping systems are provided for reference.
3. Count each 90° elbow as 3' of gas pipe for the purpose of calculating total pipe length.
TESTING THE GAS SUPPLY SYSTEM
When gas supply pressure exceeds
1
/2 psig (3.45 kPa), the kettle and its individual shutoff valve must
be disconnected from the gas supply piping system.
When gas supply pressure is
1
/2 psig (3.45 kPa) or less, the kettle should be isolated from the gas
supply system by closing its individual manual shutoff valve.