Designed and constructed in accordance with ASME Section VIII Div-I Code for compressed air storage use. "U" stamped and registered with the National Board of Pressure Vessel Inspectors. Most designs include Canadian Registration Numbers (CRN) Capable of building to American Bureau of Shipping (ABS) and United States Coast Guard (USCG) codes. Custom engineered designs available upon request. Exterior surface painted with one coat standard shop primer. Special exterior and interior coatings available upon request.