Gas use common sense

gas types

1) compressed gases: oxygen, hydrogen, nitrogen, helium, and so on.
2) of dissolved gases: acetylene (dissolved in acetone)
3) liquefied gases: carbon dioxide, sulfur dioxide, propane, LPG.
4) low-temperature liquefied gas: liquid oxygen, liquid nitrogen, liquid argon, and so on.

Second, gas containers and the color code

1) oxygen, nitrogen, hydrogen, argon, seamless steel cylinders for high pressure gases such as carbon dioxide. Acetylene, propane is available made of welded steel cylinders.
2) pressure vessels are accompanied by a certificate, this certificate should be saved with the pressure vessel as a technical file. Regular inspection (for example once every three years), the date engraved on the cylinder.
3) low temperature storage tanks, cryogenic tank
4) gas cylinder colour as follows: oxygen-sky blue nitrogen hydrogen-argon-black-grey-green-yellow-white-silver-gray acetylene carbon dioxide ammonia propane red-soil.
using high pressure gas:
1) high-pressure gas containers is best stored outdoors, should be stored upright, fixation, and to prevent direct sunlight and wind.
2) acetylene pipe, pressure gauge or the use of copper (copper 60%) material, otherwise it will form the copper acetylide, is an explosive agent.
3) during high pressure gases must be fitted with pressure-relief devices may be used, its regulator, pressure gauges and catheters will be dedicated, not substitute each other.
4) high pressure gas cylinder valve left open, d-close, but hydrogen, methane, carbon monoxide and other flammable or toxic gas cylinder valve outlet thread is locked. Cylinder valve switch application-specific wheels, prohibited the use of the long arm of wrench.
5) open the bottle valve to fully open, but acetylene cylinder screw should not be more than 1.5 cycles, to prevent the outflow of acetone.
6) steel bottled acetylene pressure is less than 0.5MPa, it should be replaced, or cylinders in the acetone will flow along the pipeline into the flame, flame instability increased noise and acetylene pipe pollution caused jams.
7) cylinders shall be 0.5Mpa pressure. Prevent gas bottles empty, mixed with air pollution gas bottles or gas formed in the gas cylinder explosion.