Overpressure activities

OTN uses overpressure for a wide variety of activities, including underwater welding in habitats, immersion, work on tunnelling drills and more. Thanks to our years of experience and knowledge in this field, OTN is proud to be an overpressure activities expert operating on the international market.


We perform a variety of activities including development of air pressure tables, preparation of planning documents, decompression procedures, work and safety plans in accordance with NEN / ISO 9002 standards, performance of underwater activities in dry conditions using habitats, pneumatic caisson sinking, activities involving tunnelling drill chucks, storage tank repairs, excavation activities for underground structures.