Glossary of Industry Terms
Closed disposal system
A disposal system capable of containing pressures that are different from atmospheric pressure.
Closed-bonnet pressure relief valve
A pressure relief valve whose spring is totally encased in a metal housing. This housing protects the spring from corrosive agents in the environment and is a means of collecting leakage around the stem or disk guide. The bonnet may or may not be sealed a
CO (Company for Sale)
Cold differential test pressure
The pressure relief valve is adjusted to open on the test stand. The cold differential test pressure includes corrections for the service conditions of back pressure or temperature or both.
Condensates
Hydrocarbons which are in the gaseous state under reservoir conditions and which become liquid when temperature or pressure is reduced. A mixture of pentanes and higher hydrocarbons.
Cracking
The process of breaking down large molecules of oil into smaller ones. Thermal cracking if heat is used, catalytic (cat.) cracking if a catalyst is used or hydrocracking if the catalytic process is conducted in a hydrogen atmosphere.
