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How do we interpret industrial gases according to national standards? Dec 28, 2017

How does industrial gas explain in national standards? What does it include? This is what will be described below. Our deep understanding of these knowledge enables us to better define industrial gases, so as to clarify our concept, which is beneficial and harmless to us. So why should we not?

In the national standard GB13690-1992, that is, the Classification and marking of commonly used hazardous chemicals, industrial gases are usually divided into the second kind of compressed gases and liquefied gases. A compressed gas is a gas that is pressed into the cylinder after pressure or cooling. Liquefied gas refers to after the gas is pressurized, it is dissolved in a solvent, and then stored in the cylinder. The compressed gases include oxygen, nitrogen, argon, hydrogen and so on, and the liquefied gases include acetylene.

If the industrial gas can be divided into four major categories according to chemical properties, which are toxic gas, flammable gas, combustion gas and non combustible gas. In the national standard GB13690-1992, the four categories are divided into three categories: flammable gases, non flammable gases and toxic gases, and the non flammable gases include the combustion-supporting gases.

According to the national standard GB16163-1996, that is, Classification of cylinder compressed gases, industrial gas can be divided into.

Permanent gas: The critical temperature is less than -10℃. The filling, storage, transportation and use of permanent gases are all gaseous.

Liquefied gas: High pressure liquefied gas and low pressure liquefied gas whose critical temperature is more than -10℃, and the maximum critical value of high pressure liquefied gas is 70℃, which is liquid when filling. However, during storage and transportation, the liquid will become gaseous state with the increase of temperature.

Dissolved acetylene: It is the basis of mixing gas.

Generally speaking, industrial gas is stored in a compressed or liquefied state in the cylinder. However, it has a certain pressure, so if the cylinder is subjected to high temperature or sun, or shock or impact greatly, the bottle pressure will increase suddenly. Once the pressure range is over the container, the cylinder will explode. When using, we must be careful to prevent the occurrence of danger.