MIL-STD-1247 Markings, Functions And Hazards Designations Of Hose, Pipe, And Tube Lines For Aircraft Missile, And Space SystemsThis standard establishes material labeling requirements for identification, function, subfunction, pressures, hazards and direction of flow for pipes, hoses and tube lines used in aircraft, missile, space systems, and support equipment. The use of colors, words and symbols to identify the functions of such items to include approved abbreviations, and the dimensions of labeling items such as tags, tapes, and bands, are specifically prescribed see 4.1.1.

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MIL-STD-1247D

5. DETAILED REQUIREMENTS

5.1 Function.

5.1.1. Colors. Colors conforming to FED-STD-595 as shown in 2.2.1 shall be used to denote function as specified in 5.1.1.1.

5.1.1.1 Application of colors. Color coding shall be based upon function as indicated below. Where more than one color is required to identify a single function the order of colors is from left to right, and the colored area shall be composed of vertical stripes, of equal width, of the required colors (see figures 2 and 4).

Function                                                   Color

Fuel                                                          Red

Rocket Oxidizer                                       Green, Gray Rocket Fuel                                              Red, Gray Water Injection                                        Red, Gray, Red Lubrication                                               Yellow Hydraulic                                                 Blue, Yellow Solvent                                                     Blue, Brown Pneumatic Air                                          Orange, Blue Instrument Air                                          Orange, Gray Coolant                                                     Blue

Breathing Oxygen                                    Green

Air Conditioning                                      Brown, Gray Monopropellant                                        Yellow, Orange Battery Activator                                      Yellow, Gray Rain Repellants                                        Blue, Gray

Vacuum                                                    Gray, Orange, Gray

Fire Protection                                          Brown

De-Icing                                                   Gray

Rocket Catalyst                                        Yellow, Green Compressed Gas                                      Orange Electrical Conduit                                    Brown, Orange Inerting Fluid                                           Orange, Green

5.1.1.2 Colors on tapes. Tapes used to identify function shall be 1 inch minimum width. The left-hand side shall be colored, and ¼ inch of the right-hand side shall be reserved for geometric symbols.

5.1.1.3 Colors on painted bands. Paints used for color coding lines in accordance with

4.2.3 shall conform to the color requirements of 5.1.1 and the coding requirements of 5.1.1.1. The entire painted identification group shall completely encircle the line, and shall be of sufficient length to allow a clearance of one-half the letter height (see 5.1.3.3) between lettering and color coding on one end and between lettering and unlettered surfaces on the other end. The color coding shall appear on the left hand side of the identification group as depicted in figure 1,

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