NACE and BGAS Standards for Holiday Detection

NACE and BGAS Standards for Holiday Detection

Holiday detection, also known as holiday testing or voltage indication testing, is a type of quality control procedure used to identify defects in protective coatings on pipelines, tanks, and other structures. These defects, known as "holidays," are areas where the coating is not present and the underlying substrate is exposed to the environment. Holiday detection helps ensure that coatings are applied consistently and effectively, and can detect holidays that may not be visible to the naked eye.


There are several industry organizations that provide standards and guidance for holiday detection, including NACE International (formerly known as the National Association of Corrosion Engineers) and the British Gas Association (BGAS).

NACE Standards

NACE is a professional society dedicated to the study of corrosion and its prevention. It publishes a number of standards related to holiday detection, including:

  • NACE SP0188-2014: "Holiday Detection of Protective Coatings"
  • NACE RP0287-2002: "Detection of Holidays in Protective Coatings"
  • NACE RP0494-2003: "Voltage Indication (Holiday Detection) of Protective Coatings"

These standards provide guidance on the appropriate procedures and requirements for holiday detection of coatings, including the voltage and current levels to be used, the minimum acceptable level of coating coverage, and the acceptable level of holiday detection sensitivity.

BGAS Standards

The BGAS is a professional association for the gas industry in the United Kingdom. It publishes a number of standards related to holiday detection, including:

  • BGAS-CSWIP PA2-92: "Holiday Detection"
  • BGAS-CSWIP PA2-95: "Holiday Detection of Protective Coatings"

These standards provide guidance on the appropriate procedures and requirements for holiday detection of coatings in the gas industry, including the voltage and current levels to be used, the minimum acceptable level of coating coverage, and the acceptable level of holiday detection sensitivity.


In conclusion, NACE and BGAS are two of the leading organizations that provide standards and guidance for holiday detection of coatings. These standards help ensure that coatings are applied consistently and effectively, providing maximum protection against corrosion and other forms of degradation.