OSHA Handbook for Small Businesses

Identification of Piping Systems

Identification of Piping Systems

  • When nonpotable water is piped through a facility, are outlets or taps posted to alert employees that it is unsafe and not to be used for drinking, washing or other personal use?
  • When hazardous substances are transported through above ground piping, is each pipeline identified at points where confusion could introduce hazards to employees?
  • When pipelines are identified by color painting, are all visible parts of the line so identified?
  • When pipelines are identified by color painted bands or tapes, are the bands or tapes located at reasonable intervals and at each outlet, valve or connection?
  • When pipelines are identified by color, is the color code posted at all locations where confusion could introduce hazards to employees?
  • When the contents of pipelines are identified by name or name abbreviation, is the information readily visible on the pipe near each valve or outlet?
  • When pipelines carrying hazardous substances are identified by tags, are the tags constructed of durable materials, the message carried clearly and permanently distinguishable and are tags installed at each valve or outlet?
  • When pipelines are heated by electricity, steam or other external source, are suitable warning signs or tags placed at unions, valves, or other serviceable parts of the system?