What gases are suitable for flashback arrestor

Flashback arrestor are not universal for all gases and must be matched with specific gases based on their specific design. It is mainly divided into two categories:
1. Combustible gas (fuel gas)flashback arrestor
This is the main application area of flashback arresters, used to prevent flashback in combustible gas pipeline systems. Different gas flashback arresters must not be mixed!
Acetylene: This is the most common and demanding type. Acetylene has extremely high combustion speed and explosion hazard, so the flame retardant components of acetylene flashback arresters are the most precise.
Propane/liquefied petroleum gas: also a common gas, mainly used for gas cutting, metal heating, etc.
Natural gas/coal gas: used in industrial furnaces, gas pipelines, etc.
Hydrogen gas: The flame propagation speed of hydrogen gas is extremely fast and has strong permeability, requiring specially designed flashback arresters.
Methane, ethane, butane and other combustible gases.
Important usage principle: The applicable gas type must be clearly marked on the shell of the tempering preventer. For example, a flashback preventer labeled “for acetylene” should never be used for propane or hydrogen, as it may not effectively block the fire and lead to serious accidents.

2. Combustion supporting gas (oxygen) flashback arrestor
This is a common misconception. In fact, oxygen itself does not backfire because backfire is the propagation of flames, and oxygen is a combustion enhancer that does not support independent combustion.
However, there is also a risk of backfire in oxygen pipelines during gas welding and cutting. This is because during tempering, flames may enter the oxygen hose through the mixing chamber of the welding and cutting torch.
If combustible substances (such as grease or gas flowing back from the combustible gas pipe) are mixed into the oxygen hose, a combustible mixture will form in the oxygen pipeline and be ignited.
Therefore, oxygen pipelines also need to be equipped with flashback arresters, which prevent flames from backfiring from the welding and cutting torch into the oxygen hoses and cylinders. The structure of this type of preventer is similar to that of a combustible gas preventer, but the design takes into account the strong oxidizing properties of oxygen (requiring the use of non oil materials).