Table of Contents
Advertisement
Table 1 ‐ Physical properties of main components of an LPG mixture
Physical properties of a liquid state
formula
molecular weight
boiling temperature (°C)
3
density (kg/m
at 20°C)
Physical properties of a gaseous state
3
density (kg/m
at atmospheric pressure)
density (air = 1)
3
calorific value (MJ/m
Explosive limit in air mixture in a % volume
lower
upper
Ignition temperature in °C
Physical properties of an LPG mixture are within the properties of individual components. Liquid LPG has
similar properties as gasoline, it means that it dissolves and dries out sealing made of natural rubber,
organic lubricants, varnish, and other similar materials. On the contrary to this, synthetic rubber, graphite
sealing, Teflon, etc. are resistant to LPG effects. A Teflon tape or LOCTITE are used to seal threaded
connections for liquefied and gaseous LPG. The use of alcohol sealants or sealants made of lampblack
(HERMETIC, HERMOSAL) results in difficulties in disassembling such sealed connections. Teflon sealing
rings or sealing rings made of klingerite suitable for LPG are used at flange connections.
Gaseous LPG influences human organism as a slight narcotic. Inhalation of gaseous LPG for a certain time
causes headache, nausea, faintness, reduction of vigilance, and drowsiness. If no fire and burning of an
affected person occurs, gaseous LPG may cause suffocation of workers even if it is not directly poisonous
such as coal gas. Since it is heavier than air, it accumulates at the ground and in recesses and an
unconscious lying person (injured, etc.) may be in an unbreathable atmosphere. Gaseous LPG also causes
skin degreasing.
Liquefied LPG under a rapid decrease of overpressure to atmospheric pressure (e.g. emission of liquefied LPG
from equipment) evaporates by boiling at ‐42 °C. Therefore, frostbites may occur after contact of liquefied LPG
with skin.
1.3.3. ADBLUE® CHARACTERISTICS
AUS 32 reagent intended for reduction of NOx content in fumes, also known under a commercial name
of AdBlue®, is a 32.5% solution of urea, water, and other admixtures. This solution was selected because
it has the lowest crystallization temperature. To ensure proper activity of the SCR system during its life,
the quality of AdBlue® must be strictly checked. Therefore, it is specified in DIN 70070 and ISO 22241
standards. Some important physical properties of AdBlue®:
AdBlue® freezes at ‐11 °C
AdBlue® is highly corrosive because 67.5 % of it is formed by water
AdBlue® shows strong crystallization and deformation effects
at 0 °C and atmosp. pressure) 93.57
TATSUNO EUROPE a.s., www.tatsuno‐europe.com
propane
C
H
3
8
44.09
‐42.6
502
1.865
1.562
1.7
10.9
465
12
butane
C
H
4
10
58.12
‐0.6
579
2.76
2.091
123.76
1.3
9.3
365
Advertisement
Table of Contents
