6 Types of Cylinder Seals
Have you ever wondered what keeps hydraulic cylinders functioning smoothly without leaks? The secret lies in the types of seals used within them. This article dives into six essential types…
Have you ever wondered what those colorful gas cylinders in industrial settings contain? As a mechanical engineer with over a decade of experience, I’m here to demystify the gas cylinder color coding system. In this article, we’ll explore the standardized color codes and markings used to identify various gases, ensuring safety and efficiency in the workplace. Get ready to dive into the fascinating world of gas cylinder identification!
Note: This color coding system is based on common industry standards, but may vary slightly depending on regional regulations and specific manufacturer practices. Always refer to local safety guidelines and cylinder labels for definitive identification.
Table 1. Gas Cylinder Color Code Chart
| No. | Gas Name | Chemical Formula | Cylinder Color | Lettering | Letter Color | Ring Color | |
| 1 | Acetylene | C2H2 | White | Acetylene – Keep away from open flame | Bright red | ||
| 2 | Hydrogen | H2 | Light green | Hydrogen | Bright red | P = 20, light yellow single ring | |
| P = 30, light yellow double ring | |||||||
| 3 | Oxygen | O2 | Light (thioindigo) blue | Oxygen | Black | P = 20, white single ring | |
| 4 | Nitrogen | N2 | Black | Nitrogen | Light yellow | P = 30, white double ring | |
| 5 | Air | Black | Air | White | |||
| 6 | Carbon Dioxide | CO2 | Aluminum white | Liquid Carbon Dioxide | Black | P = 20, black single ring | |
| 7 | Ammonia | NH3 | Light yellow | Liquid Ammonia | Black | ||
| 8 | Chlorine | Cl2 | Dark green | Liquid Chlorine | White | ||
| 9 | Fluorine | F2 | White | Fluorine | Black | ||
| 10 | Tetrafluoromethane | CF4 | Aluminum white | Freon-14 | Black | ||
| 11 | Methane | CH4 | Brown | Methane | White | P = 20, light yellow single ring | |
| P = 30, light yellow double ring | |||||||
| 12 | Natural Gas | Brown | Natural Gas | White | |||
| 13 | Ethane | C2H6 | Brown | Liquefied Ethane | White | P = 15, light yellow single ring | |
| P = 20, light yellow double ring | |||||||
| 14 | Propane | C3H8 | Brown | Liquefied Propane | White | ||
| 15 | Butane | C4H10 | Brown | Liquefied Butane | White | ||
| 16 | Liquefied Petroleum Gas (LPG) | Industrial use | Brown | Liquefied Petroleum Gas | White | ||
| Residential use | Silver gray | Liquefied Petroleum Gas | Bright red | ||||
| 17 | Ethylene | C2H4 | Brown | Liquefied Ethylene | Light yellow | P = 15, white single ring | |
| P = 20, white double ring | |||||||
| 18 | Argon | Ar | Silver gray | Argon | Dark green | P = 20, white single ring P = 30, white double ring | |
| 19 | Helium | He | Silver gray | Helium | Dark green | ||
| 20 | Neon | Ne | Silver gray | Neon | Dark green | ||
| 21 | Krypton | Kr | Silver gray | Krypton | Dark green | ||
| 22 | Carbon Monoxide | CO | Silver gray | Carbon Monoxide | Bright red | ||
(1) Inspection Intervals Based on Cylinder Type and Service:
a. Seamless Steel Gas Cylinders:
b. Welded Steel Gas Cylinders:
c. Liquefied Gas Cylinders:
d. Acetylene Gas Cylinders:
(2) Cylinder Integrity:
Gas cylinders must be free from defects, mechanical damage, or severe corrosion. Any corrosion spots should not exceed 2mm in depth and 200mm in length.
(3) Cylinder Markings and Labeling:
The cylinder’s surface must comply with regulations regarding:
(Refer to Table 2-1-1 in the attached document for specific requirements)
(4) Safety Accessories:
All safety accessories must be complete, intact, and fully functional. These include:
As the founder of MachineMFG, I have dedicated over a decade of my career to the metalworking industry. My extensive experience has allowed me to become an expert in the fields of sheet metal fabrication, machining, mechanical engineering, and machine tools for metals. I am constantly thinking, reading, and writing about these subjects, constantly striving to stay at the forefront of my field. Let my knowledge and expertise be an asset to your business.
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