ANSI Pipe Labeling and Marking Standards
What are OSHA's requirements related to ANSI Pipe Marking Standards?
Pipe labeling marking standards are not specifically outlined or defined by
OSHA, but standard number 1910.261(a)(3)(i)
notes the ASME's (ANSI) standard A13.1 as the recommended scheme for
identification of pipe systems.
The ASME Standard for Pipe Identification is a widely used guideline in determining pipe identification requirements. The ASME A13.1-2007 editorial notes indicate that, "A13.1 is intended to establish a common system to assist in identification of hazardous materials conveyed in piping systems and their hazards when released in the environment." It goes on to identify that this scheme provides pipe system identification recommendations for industrial workplaces, power plants, commercial and institutional installations, and buildings used for
Editorial Note Source and A13.1-2007 Guide Purchase Information
Pipe Marker Visibility and Size Requirements
The ANSI standard A13.1 states that, "Markers shall be located so that they are readily visible to plant personnel from the point of normal approach." They need to instantly tell you
all you need to know about pipe contents, direction of flow, and whether the contents are hazardous or safe.
|Outside Diameter of Pipe or Covering
||Length of Color Field
|3/4" - 1 1/4" (19-32mm)
|1 1/2" - 2" (38-51mm)
|2 1/2" - 6" (64-152mm)
||1 1/4" (32mm)
|8" - 10" (203-254mm)
||2 1/2" (64mm)
|10" (254mm) or bigger
||3 1/2" (89mm)