
OM-263 357 Page 21
11-2. Fuel Gas And Flame Characteristics
Settings: Neutral Flame
Acetylene − Oxygen
After igniting, open acety-
lene valve until soot disap-
pears from end of flame.
Add oxygen until the feather
shown on the right just dis-
appears in the bright inner
cone.
Propane − Oxygen
After igniting, add oxygen
until bright inner core reach-
es its shortest point and
then stop. Repeat process
to force as much fuel
through the tip as possible.
Flame Settings
Neutral Flame
Even Mixture of Fuel and Oxygen
Carburizing (Reducing) Flame
Excess Fuel Gas
S
Lower Temperature
S
Less Oxidizing
Oxidizing Flame (Seldom Used)
Excess Oxygen
S
Short Outer Flame
S
Narrow Inner Cone
S
Noisy
S
Hottest
11-3. Flame And Heat Placement BTU Output Per Cubic Ft Of
Fuel Burned With Oxygen
Fuel Gas
Total BTU
Output
ft
3
Gas/hr
(L Gas/hr)
Flame Temperatures
In
°
F (
°
C)
Oxygen
To Fuel
Ratio
Compressed
Air Tips
Atmospheric
Air Tips
Oxygen
Acetylene
500
970
1470
(41,626)
4800
(2649)
1500
(816)
6000
(3316)
25:1
Propane
250
2250
2500
(70,792)
3500
(1927)
1500
(816)
4800
(2649)
5:1
Natural Gas (City Gas)
11
900
911
(25,797)
3400
(1871)
−−
4600
(2538)
2:1
Hydrogen
55
270
325
(9203)
4000
(2204)
−−
4800
(2649)
5:1
11-4. Cylinder Valve Identification For Regulator Selection
.
Compressed Gas Association connection numbers are also shown.
PROPANE
ACETYLENE
OXYGEN
LARGE
INDUSTRIAL
FROM
60–400 Cu. Ft.
“B”
40 Cu. Ft.
“C”
10
Cu. Ft.
ALL
SIZES
510
510
Internal
Threads
520
200
540
Internal
Содержание 11-1101C
Страница 27: ...OM 263 357 Page 25 Notes ...