Piping Related Abbreviations (C)

CMTR is an abbreviation of Certified Material Test Report.
A Certified Material Test Report attesting that the material is in accordance with specified requirements, including the actual results of all required chemical analyses, tests, and examinations.

CSC is an abbreviation of Car Seal Closed.
Very simply, the terms describe to need to lock (seal) a valve to prevent operation either in the open or closed position. The device to achieve this is a Car Seal (see also CSO).

CSO is an abbreviation of Car Seal Open.
Very simply, the terms describe to need to lock (seal) a valve to prevent operation either in the open or closed position. The device to achieve this is a Car Seal (see also CSC).

CUI is an abbreviation of Corrosion Under Insulation.
In the simplest terms, CUI is any type of corrosion that occurs due to moisture present on the external surface of insulated equipment. The damage/attack can be caused by one of the multiple factors, and can occur in equipment operating at ambient, low, and heated services, depending upon conditions. Moreover, CUI can occur in equipment that is in service, out of service, or in cyclic service.

CUPS is an abbreviation of Corrosion Under Pipe Supports.
CUPS is a widespread problem in the oil and gas industry, chemical processing plants, power plants, and the petrochemical industry. The natural process of corrosion that affects all metals and causes wear over time is present in all of the above sectors.