The international natural gas is measured in "thousand cubic meters", and the domestic natural gas is also measured in "thousand cubic meters", but the domestic sales unit is "cubic meters", and the civil canned gas is sold to consumers in kilograms. Basically these three units. Among them, it is very inaccurate to measure natural gas in kilograms.

Precautions:

Natural gas is contained in underground porous rocks, including oil and gas, gas field gas, coalbed methane, mud volcanic gas and biogas, and a small amount comes from coal seams. It is a high-quality fuel and chemical raw material.

Natural gas is mainly used as fuel to produce carbon black, chemicals and liquefied petroleum gas. Propane and butane produced from natural gas are important raw materials for modern industry. Natural gas is mainly composed of gaseous low molecular hydrocarbons and non-hydrocarbon gases.

It is mainly composed of methane (85%) and a small amount of ethane (9%), propane (3%), nitrogen (2%) and butane (1%). Mainly used as fuel, but also used as raw materials for the manufacture of acetaldehyde, acetylene, ammonia, carbon black, ethanol, formaldehyde, hydrocarbon fuel, hydrogenated oil, methanol, nitric acid, synthetic gas, vinyl chloride and other chemicals. Natural gas is compressed into liquid for storage and transportation.

Coal miners, nitric acid producers, power plant workers, organic chemical synthesizers, gas users, refiners, etc. Have access to this product. It mainly enters the human body through the respiratory tract. This is a simple suffocating gas. When the concentration is high, oxygen deficiency due to air replacement leads to shortness of breath and loss of consciousness; In severe cases, people may suffocate and die due to hypoxemia. High pressure natural gas can cause frostbite. Incomplete combustion will produce carbon monoxide.