Compressed natural gas in the end of this cargo is a few categories
Hazard characteristics: the explosion limit at -162 DEG C is 6%-13%. When the liquefied natural gas from liquefied gas evaporation is not cold when the density and temperature of natural gas, about 1.5 times the weight of the air, gas does not immediately rise, but along the surface or ground water and surface diffusion, absorption heat and atmospheric and solar radiation heat, the formation of white clouds. The diffusion of cold air can be detected by fog, but there is still a flammable mixture outside the visible range. If the flammable mixture diffuses into the fire, immediately fired at the flashback when the air conditioning temperature, to -112 degrees Celsius, will become lighter than air, began to rise. Liquefied natural gas is lighter than water, in case of water to produce white ice, ice can only be preserved at low temperatures, the temperature increases that is quickly evaporated, such as a sharp disturbance kinetic energy burst. Natural gas is mainly composed of methane, and its properties are similar to that of pure methane, which is a kind of "pure suffocating" gas.
Combustion and explosion hazard flammability: flammable combustion decomposition products: carbon monoxide, carbon dioxideFlash point (DEG C): -188 polymerization hazard: no polymerizationExplosion limits (%): 5.3~15 (volume fraction) stability: stableIgnition temperature (c): 650 taboo: with chlorine, chlorine dioxide, liquid oxygen, oxidant, etc.
Physical and chemical properties: colorless odorless liquidMelting point (-182): slightly soluble in water; soluble in ethanol, ethyl etherBoiling point (c): -160~-164 relative density (water =1): 0.42 (-164 C)Saturated vapor pressure (Kpa): 53.32 (-168.8 DEG C) relative density (air =1): 0.45Critical temperature (c): -82 combustion value (KJ.mol-1): 889.5Critical pressure (Mpa): 4.59 minimum ignition energy (fro): 0.28
Natural gas (liquefied natural gas) English Name: liquefied natural gasMolecular formula: CH4 molecular weight: 16.04 UN number: 1972Danger number: 21008 RTECS: PA1490000 CAS: 74-82-8Hazard class: class 2.1 flammable gases chemical category: Alkanes
