Pipe markings save lives - Do you know your standards and color codes?

PIPE MARKING ANSI/ASME A13.1 2007 Standard Color Chart FLAMMABLE HYDROGEN Black on Yellow COMBUSTIBLE ACETIC ACID White on Brown TOXIC/CORROSIVE Black on Orange NITRIC ACID FIRE QUENCHING FIRE WATER White on Red OTHER WATER BOILED WATER White on Green COMPRESSED AIR NITROGEN White on Blue White on Grey Any vapor or gas under pressure that does not fit a category above White on Black White on Purple Black on White Pipe Marker Placement MARKER MARKER Label placement in relation to point of normal approach Adjacent to changes in direction Every 25'-50' on straight runs is typical Size chart Outside pipe Minimum Min. diameter Letter MARKER - MARKER Length Field Color Height w/cover .75"-1.25" 8" .5" Adjacent to all valves & flanges Both sides of floor/ wall penetrations 1.5"-6" 8" .75" 2.5“-6" 12" 1.25" 8"-0" 24" 2.5" Over 10" 32" 3.5" MARKER MARKER