Almost 10 years, more than 3000 pressure vessels.
For over a decade UAC has been manufacturing pressure vessels for a number of applications offshore. Since 2008, we have delivered close to 3000 pressure vessels to the global drilling fleet of high-spec semi-submersible oil rigs and drill ships, as well as, heave compensation systems for large offshore and subsea cranes and winches.
Our extensive experience with deliveries of pressure vessels to the offshore sector used for nitrogen, air and methane / CNG, has been in close cooperation with various classification societies, flag and port states, where safety requirements are essential. UAC pressure vessels have been delivered with approvals from Lloyds Register, DNV-GL, ABS and BV.
Heave compensation systems.
The onboard air or nitrogen reservoir is used to compensate for the wave induced motions of the drill string and the subsea riser, including for ultra-deep waters with an operational pressure of approximately 200 bar. For offshore cranes, a pressure of up to about 330 bar is accommodated.
Marine CNG for offshore applications.
In areas with an existing offshore oil and gas infrastructure, CNG can be a way to monetize gas from existing production units that currently re-inject the gas into the reservoir, or at locations where gas is flared. CNG ships can provide continuous gas delivery to a specific location and CNG carriers may give the opportunity of redeployment of the floating assets.
CNG can also be utilized to explore smaller gas reservoirs, which are not in close proximity to existing infrastructure and are not developed due to low volumes and/or far distance to power plants or other gas consumers that make them economically unviable.
The approval of a marine CNG containment system is generally considered by a classification society, which evaluates the system during its development from the initial design concept to the actual use for containment of CNG onboard a particular ship. This calls for long-term design criteria and stringent testing of material properties for a required number of cycles (loading of cargo) and design life. Based on well-proven technology, UAC has developed a new design for a larger CNG pressure vessel that offers larger containment volumes and great safety onboard ships and offshore units.