Tabela de códigos de cores do cilindro de gás: um guia abrangente

Gas Cylinder Color Code Chart: A Comprehensive Guide

April 29, 2024 Roberto Magalhães

Table 1. Gas cylinder color code table

No.	Gas name		chemical formula	Cylinder color	Letters	Letter color	Ring color
1	Acetylene		_C2H2	White	Acetylene – Keep away from open flames	Bright red
two	Hydrogen		_H2	Green light	Hydrogen	Bright red	P = 20, single light yellow ring
two	Hydrogen		_H2	Green light	Hydrogen	Bright red	P = 30, light yellow double ring
3	Oxygen		Oh ₂	Light blue (thioindigo)	Oxygen	Black	P = 20, white single ring
4	Nitrogen		N ₂	Black	Nitrogen	Yellow light	P = 30, white double ring
5	Air			Black	Air	White
6	Carbon dioxide		_CO2	White aluminum	Liquid Carbon Dioxide	Black	P = 20, black single ring
7	Ammonia		NH ₃	Yellow light	Liquid Ammonia	Black
8	Chlorine		Cl ₂	Dark green	Liquid Chlorine	White
9	Fluorine		F ₂	White	Fluorine	Black
10	Tetrafluoromethane		FC ₄	White aluminum	Freon-14	Black
11	Methane		_CH4	Brown	Methane	White	P = 20, single light yellow ring
11	Methane		_CH4	Brown	Methane	White	P = 30, light yellow double ring
12	Natural gas			Brown	Natural gas	White
13	Ethane		C ₂ H ₆	Brown	Liquefied Ethane	White	P = 15, light yellow single ring
13	Ethane		C ₂ H ₆	Brown	Liquefied Ethane	White	P = 20, light yellow double ring
14	Propane		C ₃ H ₈	Brown	Liquefied Propane	White
15	Butane		C ₄ H ₁₀	Brown	Liquefied Butane	White
16	Liquefied Petroleum Gas (LPG)	Industrial use		Brown	Liquefied petroleum gas	White
16	Liquefied Petroleum Gas (LPG)	Residential use		Silver grey	Liquefied petroleum gas	Bright red
17	Ethylene		_C2H4	Brown	Liquefied Ethylene	Yellow light	P = 15, white single ring
17	Ethylene		_C2H4	Brown	Liquefied Ethylene	Yellow light	P = 20, white double ring
18	Argon		Air	Silver grey	Argon	Dark green	P = 20, white single ring P = 30, white double ring
19	Helium		He	Silver grey	Helium	Dark green
20	Neon		No	Silver grey	Neon	Dark green
21	Krypton		Cr	Silver grey	Krypton	Dark green
22	Carbon monoxide		CO	Silver grey	Carbon monoxide	Bright red

Gas cylinder conditions:

(1) Used within the inspection period:

The. Seamless Steel Gas Cylinders:

Cylinders for corrosive gases, diving cylinders and cylinders in contact with seawater must be inspected every 2 years. General purpose cylinders must be inspected every 3 years. Inert gas cylinders must be inspected every 5 years. Cylinders that exceed 30 years of useful life will be recorded and discarded without inspection.

B. Welded Steel Gas Cylinders:

Cylinders for corrosive gases must be inspected every 2 years. General purpose cylinders must be inspected every 3 years. Corrosive gas cylinders must be discarded after 12 years.

w. Liquefied gas cylinders:

From the date of manufacture, the inspection period for the first three inspections is 4 years each, and the inspection period for the fourth inspection is 3 years. They will be discarded after 15 years.

d. Acetylene gas cylinders: Inspected every 3 years.

(2) The gas cylinder must be free from defects, mechanical damage and severe corrosion. Corrosion points must be less than 2 mm × 200 mm.

(3) The paint color, letters and ring markings on the surface of the gas cylinder must comply with regulations and must have a gas cylinder warning label. (See Table 2-1-1 in the attached document)

(4) All safety accessories must be complete and intact – Gas cylinder accessories include rupture discs, safety valves, fusible alloy plugs, cylinder valves, cylinder caps and shock absorbing rings.