while a sixth class has been reserved for fire protection equipment. A standard color has been chosen to represent each of these classes and is shown in table 4-2.

Since you work with fuel gas and oxygen, you must become familiar with the colors of the cylinders in which these gases are contained. The fuel-gas cylinder is yellow, and the oxygen cylinder is green.

In addition to color coding, the exact identification of the material contained in a compressed-gas cylinder must be indicated by a written title that appears in two locations-diametrically opposite and parallel to the longitudinal axis of the cylinder. Cylinders, having a background color of yellow, orange, or buff have the title painted black Cylinders, having a background color of red, brown, black, blue, gray, or green, have the title painted white.

COLOR WARNINGS.-The appearance on the body, top, or as a band(s) on compressed-gas cylinders of the six colors specified should provide a warning of danger from the hazard involved.

CYLINDER COLOR BANDS.-Cylinder color bands appear upon the cylinder body and serve as color warnings when they are yellow, brown, blue, green, or gray. The bands also provide color combinations to separate and distinguish cylinders for convenience in handling, storage, and shipping. Color bands for segregation purposes will not be specified for new materials not presently covered by MIL-STD-101B.

DECALS.-Two decals may be applied on the shoulder of each cylinder. They should be diametrically opposite and at right angles to the titles. They should indicate the name of the gas, precautions for handling, and use. A background color corresponding to the primary warning color of the contents should be used.

SHATTERPROOF CYLINDERS.-A shatter- proof cylinder should be stenciled with the phrase "NON- SHAT" longitudinally 90 degrees from the titles. Letters must be black or white and approximately 1 inch in size.

SERVICE OWNERSHIP.- On cylinders owned by or procured for the Department of Defense, the bottom and the lower portion of the cylinder body opposite the valve end may be used for service ownership titles.

The six colors identified in table 4-2 are used on the body and top of, or as a band on, a compressed-gas cylinder to serve as a warning of the hazard involved in handling the type of material contained in the cylinder.

Figure 4-32 shows titles and color codes for compressed-gas cylinders most often found in a construction

Figure 4-33.-Identifying color patterns for gas cylinders.

battalion or in a public works department where Seabee personnel are working. Figure 4-33 shows how cylinders are identified by the overall painted color code and