Plumbing/Piping Drawings, ContinuedColor codesMIL-STD-101C establishes the color code used to identify piping carryinghazardous fluids. It applies to all piping installations in naval industrialplants and shore stations that use color coding. All valve wheels must becolor coded. Color coding on pipes is optional.This list outlines common color codes for fluid under MIL-STD-101C.PartFunctionYellowFlammable materialsBrownToxic and poisonous materialsBlueAnesthetics and harmful materialsGreenOxidizing materialsGreyPhysically dangerous materialsRedFire protection materialsFluid lines on aircraft are marked according to MIL-STD-1247C, Markings,Functions, and Designations of Hoses, Piping, and Tube Lines for Aircraft,Missiles, and Space Systems. Aircraft fluid lines are also marked with anarrow to show direction of flow and a hazard marking. The four generalclasses of hazards are FLAM for flammable or combustible materials,TOXIC for material extremely hazardous to life or health, AAHM foranesthetics, vaporous and nonvaporous that present dangers to life andhealth, and PHDAN for materials that by themselves are not dangerous butpresent the danger of asphyxiation. PHDAN material are often pressurizedor temperature sensitive.Continued on next page4-64
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
