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Cleaning, Painting and Preserving

Upon the completion of the manufacturing process, CP Industries performs a variety of internal and external cleaning and preservation steps 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 surface with steel grit to 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 if a Federal Standard Number is provided.

We steam clean and dry the interior of a vessel to remove any oils or contaminants. We then blast it with steel grit to achieve a near-white finish and vacuum clean to remove loose particles. After inspection to ensure cleanliness, we inert the interior with dry nitrogen as a corrosion inhibitor and then seal it for shipment.

Depending on the application, we may also polish a vessel’s interior to a mirror-like finish. Pressure vessels supplied with an unpainted interior surface may be purged with dry nitrogen and sealed for shipment, as described above. Another cleaning option is to evacuate the vessel to an absolute pressure of three inches of mercury and pressurize (inert) it with dry nitrogen. Special cleaning for high-purity gas applications as well as internal coatings, are also available upon request.

Connections, Fittings and End Plugs

CP Industries offers an array of outlet fittings, safety devices, valves and miscellaneous adapters to meet our customers’ requirements. If you require multiple pressure vessels connected together, we can manifold the vessels in a horizontal or vertical stack.

For standard end plugs and fittings, any vessel end opening can be threaded internally with straight threads to accommodate standard plugs. Other types of end connections can be furnished upon request. CP Industries can also apply external straight threads on each vessel neck to facilitate mounting of the pressure vessels between I-beams or steel bulkheads.

End plugs can be provided in straight or angled configuration, in solid form or with a wide variety of threaded connections such as straight, NGT, SAE and others. Brass shipping plugs and inerting caps are also available.