Ocean Engineering

Seals for the offshore industry are sealing components for a wide range of engineered structures and equipment used in marine environments that are subjected to extreme ocean conditions such as high salinity, corrosion, wave impacts, temperature variations, and bio-attachment

Material selection

Corrosion-resistant materials: offshore seals are usually made of corrosion-resistant materials such as stainless steel (e.g. 316L), duplex stainless steel, titanium alloys, nickel-based alloys, polytetrafluoroethylene (PTFE), and polyetheretherketone (PEEK).

Seawater Resistant Materials: Materials must be able to resist corrosion from seawater, including stress corrosion cracking (SCC) caused by chloride ions.

Wear-resistant materials: Wear-resistant materials are required for marine environments where particulate matter and biological attachments may cause abrasion.

Weather resistant materials: Materials should be weather resistant and able to maintain performance under UV light and temperature changes.

Design requirements

Sealing performance: Seals must be able to maintain good sealing performance under high pressure, low pressure and dynamic conditions.

Pressure resistance: able to withstand the high pressure environment of the deep sea.

Impact resistance: able to resist the impact of waves and ship movements.

Resistance to biological attachment: the design should consider preventing the attachment and growth of marine organisms to reduce the need for maintenance and cleaning.

Manufacturing process

Precision casting: suitable for metal seals with complex shapes.

Machining: For metal and polymer seals with high precision requirements.

Injection moulding: suitable for mass production of plastic seals.

Surface treatment: such as electroplating, spraying, anodising, etc. to improve the corrosion and wear resistance of seals.

Testing and validation

Corrosion resistance test: test the corrosion resistance of seals in simulated marine environment.

Pressure resistance test: test the pressure resistance of seals under simulated deep-sea high-pressure conditions.

Impact resistance test: test the impact resistance of seals by impact testing machine.

Bio-adhesion Resistance Test: Testing the bio-adhesion resistance of seals in a marine environment.

Application Examples

Ship seals: such as hull seals, hatch gaskets, porthole seals, etc.

Offshore platform seals: such as drilling platform seals, pipe connection gaskets, valve seals, etc.

Seals for submarine pipelines: such as pipeline joint seals, pipeline support gaskets, etc.

Marine structure seals: such as breakwater seals, dock gaskets, undersea tunnel seals.

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