In order to implement the spirit of the internship in the opening ceremony of the opening ceremony of the first China International Import Expo, the Chairman of the Board of Directors of the People’s Republic of China, the State Council’s Customs Tariff Commission, reviewed and approved, and approve

Pay attention to the following items when using the check valve:1) In normal operation, the working pressure of the check valve is lower than the rated working pressure of the check valve; the flow through the check valve should be within the rated flow range allowed by the diameter, and no large pr

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