scope:

Object. The object of this standard is establish common. color code for visual warnings to accompany the written identification of materials covered in piping systems and contained in compressed gas cylinders, and to facilitate the segregation of these cylinders at depots. The use of this standard will promote greater safety and will lessen the chances of error , confusion, or inaction in times of emergency by providing a uniform color code to quickly warn personnel of outstanding hazards inherent in the materials involved. However, this standard does not define the manner or conditions under which these materials may be used safely.

Application. This standard is applicable to all ground based piping systems and to all compressed gas cylinders owned by or procured for the Department of Defense including type D one-ton containers (Department of Transportation Specification 1OGA-500). The applicability of this standard t o industry piping systems and commercial-owned cylinders (see 5.2.5.1) is encouraged. Requirements specified herein are optional for hose-lines and nozzles, ship installations; equipment intended for operations in forward area facilities, steam plants, and ,; hydroelectric plants. The identification method for bulk petroleum product systems is covered in MIL-STD-161. The identification of pipe lines for aircraft, missiles , and space vehicles is covered in MILSTD- 1247. Color coding for containers of liquid propellants is covered in MILSTD-172.

Method. This standard establishes, defines, and assigns a color for recognition to each of six classes of materials. Five classes have been selected to represent universally recognized types of hazards involved in the handling of dangerous gases and liquids. The sixth class is assigned for exclusive use of fire protection materials and equipment. This standard requires the application of the color warnings in a distinctive manner, as a visual aid and supplement to written identification.