1 acetylene white acetylene can not be near fire red2 hydrogen H2 light green hydrogen red red P=20, light yellow single ringP=30, light yellow double ring3 Oxygen O2 Light (酞) Blue Oxygen Black P=20, white single ring4 nitrogen N2 black nitrogen yellowish P=30, white double ring5 air black air whit

1. Explosion-proof drying: In the summer, it is necessary to cover the sunshade to prevent direct sunlight from illuminating the bottle.2, rainproof: the storage point should be set at a high place, preventing rain and ground area water and causing bottle rust.3, lightning protection: the storage po

No. Filling gas name Chemical type Bottle color Typeface Color circle1 acetylene white acetylene can not be near fire red2 hydrogen H2 light green hydrogen red red P=20, light yellow single ringP=30, light yellow double ring3 Oxygen O2 Light (酞) Blue Oxygen Black P=20, white single ring4 nitrogen N2

The nitrogen content in the air is the most, and nitrogen is mainly used for ammonia synthesis, and is also an important raw material for synthetic fibers, synthetic resins, and synthetic rubber. Nitrogen can be used as a preservative, refrigerant, and can also be used to make fertilizers.Followed b