Welding Gases
Acetylene
| Air
| Argon
| Carbon Dioxide(C02)
Helium | Hydrogen
| Oxygen
| Propane
Nitrogen
Nitrogen (N2) constitutes 78.03% of the air, has a gaseous specific
gravity of 0.967, and has a boiling point of -320.5°F (-195.8°C) at
atmospheric pressure. It is colorless, odorless, and tasteless.
Nitrogen is often used as an "inert" gas due to its
nonreactive nature with many materials. Common uses of
gaseous nitrogen are found in electrical systems, chemical
manufacturing, purging, and air-powered tools. Liquid nitrogen,
produced by the cryogenic air separation process, finds wide use as a
refrigerant gas in applications such as cryogenic grinding of plastics
and food packaging.
Commercial
nitrogen is produced by a variety of air separation processes, including
cryogenic liquefaction and distillation, pressure swing adsorption (PSA),
and membrane separation.
Nitrogen
can react to form certain compounds under the influence of chemicals,
catalysts, or high temperature; therefore it is not used as a
shielding gas in the welding industry.
| DOT
Information |
| DOT
Name: |
|
Nitrogen |
| DOT
Hazard Class: |
|
Nonflammable
Gas |
| DOT
Label: |
|
Nonflammable
Gas |
| DOT
ID No.: |
|
UN1066 |
| CAS
No.: |
|
7727-37-9 |
| Valve
Outlet: |
|
CGA 580 |
| |
|
|
| Physical
State in High Pressure Cylinder:Gas |
| Major
Hazards: |
|
High
Pressure, Suffocation |
| Fire
Potential: |
|
Nonflammable |
| |
|
|
|
Physical
Properties of Nitrogen |
| Formula: |
|
N2 |
| Molecular
Weight: |
|
28.013
lb/mol |
| Specific
Volume at 70°F and 1 atm: |
|
13.8 ft3/lb
(12.00 m3/kg) |
| Specific
Heat: |
|
6.97
BTU/lbmol-deg F@ 70 deg. F |
| Specific
Gravity: |
|
.967 |
| Gas
Density: |
|
0.07247
lb/ ft3 @ 70 deg. F. 14.7 PSIA |
| |
|
|
| Boiling
Point |
| Temperature: |
|
-320.5
deg. F (-195.8 deg. C) |
| Liquid
Density: |
|
50.50
lb./ft3 |
| Latent
Heat: |
|
85.5
BTU/lb. |
| |
|
|
|
Critical Point |
| Temperature: |
|
-232.4
deg. F |
| Pressure: |
|
492.9
PSIA |
| |
|
|
|
Melting Point |
| Temperature: |
|
-346.0
deg. F |
| Pressure: |
|
1.82
PSIA |
|
Industrial
Compressed Gas Cylinders
* Denotes lightweight
aluminum cylinder
|
PART
NUMBER
|
CYL
SIZE
|
WEIGHT
OF GAS (LBS.)
|
APPROX.
WT OF FULL
CYL (LBS.)
|
PRESSURE
(PSI @ 70F)
|
GALLONS
|
LITERS
|
DIMENSIONS
(Height x Diameter)
|
|
NIT020
|
20
ft3
|
1.449
|
14
|
2015
|
149
|
566
|
18"
x 5-1/2"
|
|
NIT058*
|
58
ft3
|
4.202
|
25
|
2015
|
433
|
1642
|
27"
x 8"
|
|
NIT115
|
115
ft3
|
8.3313
|
65
|
2217
|
860
|
3257
|
48"
x 7"
|
|
NIT143*
|
143
ft3
|
10.360
|
52
|
2217
|
1069
|
4049
|
47"
x 8"
|
|
NIT230
|
230
ft3
|
16.663
|
150
|
2217
|
1721
|
6514
|
51"
x 9"
|
|
NIT304
|
304
ft3
|
22.025
|
180
|
2640
|
2274
|
8609
|
55"
x 9-1/4"
|
Medical
Compressed Gas Cylinders
|
PART
NUMBER
|
CYL
SIZE
|
WEIGHT
OF GAS (LBS.)
|
APPROX.
WT OF FULL
CYL. (LBS.)
|
PRESSURE
(PSI @ 70F)
|
GALLONS
|
LITERS
|
DIMENSIONS
(Height x Diameter)
|
|
NITE
|
23
ft3
|
1.667
|
10
|
2015
|
172
|
651
|
30"
x 4-1/4
|
|
NITM
|
115
ft3
|
8.3313
|
65
|
2217
|
860
|
3257
|
48"
x 7"
|
|
NITH
|
230
|
16.663
|
150
|
2217
|
1721
|
6514
|
51"
x 9"
|
|
SERVICE
IS OUR MAIN ITEM . . . AND WE ARE NEVER OUT OF STOCK!
Havard Welding
713-672-1743 1601 Clinton Galena Park, Texas
77547
|
