Cleaning, Painting and Preserving

Upon the completion of the manufacturing process, CP Industries performs a variety of internal and external cleaning and preservation stages to ensure that the pressure vessel will perform acceptably in the intended application.

The exterior of a vessel is cleaned and preserved by blasting the vessel’s surface with steel grit, obtaining a near white finish.  Once the service life of the pressure vessel has been determined, the application of the final protective paint system is performed.  The exterior color can be matched to an exact color provided that a Federal Standard Number is provided. 

Vessel interiors are steam cleaned and dried to remove all oil and contaminants, then steel grit blasted to obtain a near white finish and vacuum cleaned to remove all loose particles.  Interiors are inspected to ensure cleanliness, then inerted with dry nitrogen to inhibit corrosion and sealed for shipment. Vessel interiors may be polished to a near mirror-like finish for specific applications.  Specialized high purity cleaning options are available upon request.  A wide range of protective internal coatings is also offered.

Pressure vessels supplied with an unpainted interior surface may be cleaned with dry nitrogen and sealed for shipment.  Another cleaning option is to evacuate the vessel to an absolute pressure of three inches of mercury and pressurized (inerted) with dry nitrogen. 

Also available for the interior surface is conditioning such as electropolish, passivation and special cleaning for high purity gas applications as well as internal coatings.