1. liquefied petroleum gas (Y)
is mainly a by-product of petroleum exploitation and refining, and its main components are C3H8 and C4H1.
it is divided into three categories: 19Y, 2Y and 22Y with rated pressure of 28Pa；; The bottled liquefied gas is 2Y. The products produced by Wanhe are mainly 2Y.
2. Natural gas (T)
The main component is CH4, with a small amount of unsaturated hydrocarbons, CO2, N2, O2, etc.
it is divided into five categories: 4T, 6T, 1T, 12T and 13T.
the rated pressure of p>1T, 12T and 13T is 2Pa, and that of 4T and 6T is 1Pa；;
wanhe mainly produces 12T and 13T products. At present, 13T products are basically not produced, and the so-called natural gas mainly refers to 12T products at present.
3. Artificial gas (R)
There are two main methods to make it:
First, the raw coal or coke is put into an industrial furnace for combustion, and air and steam are introduced to generate combustible gas;
Or heating in isolation from the air, so that the coal will undergo physical and chemical changes. After heating, it is proposed that the combustible gas can be purified to obtain tar, ammonia, crude benzene and other chemical products.
main ingredient: H2; CO； CH4； C2； N2； CO2。
it is divided into three categories: 5R, 6R and 7R with rated pressure of 1Pa.