The focus of production and historical development of OKZ HOLDING have led the company to its long-term activities in refineries and other petrochemical and chemical operations.

Besides the construction of new storage tanks, we mainly carry out the following activities in refineries:

• Repairs, maintenance and modernisation of tanks in operation
• Repairs and maintenance of steel structures, piping bridges and special technologies
• Repairs and maintenance of piping distribution networks
• Repairs and maintenance of technical equipment

The above mentioned activities are performed during standards testing or during production equipment shutdown.

There is a special requirement for work safety in petrochemical and chemical operations with a danger of explosion; to comply with which the company has adopted special internal regulations.
OKZ HOLDING has been executing these activities successfully since 2002 for Unipetrol RPA and Česká Rafinérská, where it has its branch office and permanent regional company workplace.
Since 2005 the Lithuanian subsidiary company OKZ HOLDING Baltija has been operating as a permanent contractor of assembly works also for the Lithuanian refinery AB Mažeikiu Nafta.