Gas Tank Maintenance ServiceGas Tank Maintenance ServiceGas Tank Maintenance Service

BUSE services for vacuum-insulated cryogenic vessels

Service for your storage unit, inside and out

At our site in Steinheim-Bergheim (North Rhine-Westphalia), we repair and overhaul vacuum-insulated cryogenic vessels. These include vacuum-insulated storage units for all cryogenic liquefied gases (such as N2, O2, Ar and CO2), plus their peripherals and accessories.

In addition, we overhaul pressure vessels used to store other gases (e.g. H2) and, where agreed with the customer, conventional CO2 storage units with polyurethane foam insulation, and their peripherals and accessories.

Within the scope of our services for vacuum-insulated cryogenic vessels, we offer:


Inspection

To repair or not to repair – we answer the question

We begin the overhauling process with a thorough inspection of the condition of each storage unit, performed by one of our experts, on its arrival at our site. The results of the evaluation are documented 

The inspection encompasses an examination of the tank’s exterior and the condition of:

  • the vacuum systems
  • the piping
  • the evaporator
  • the valves and safety components
  • the instrumentation, such as manometers, tank level indicators and other electronic components

Upon completion of the inspection, we compile a status report and discuss how to proceed with the customer.


Overhaul and repair

The skills and equipment for practically any task

We overhaul, repair and upgrade vacuum-insulated cryogenic vessels for industrial gas companies. We service units from any manufacturer, for any application, no matter what size or age.

Our facility has the ideal technical and human resources for overhauling, maintaining and repairing storage tanks. Moreover, our organization is certified to perform welding tasks according to AD 2000-Merkblatt HP0 and EN ISO 3834-3

There are several steps involved in overhauling, depending on the condition and the age of the unit. The following may be carried out:

  • Repairing the vacuum system
  • Replacing all piping
  • Replacing instruments and other equipment, such as valves and external pressure vaporisers
  • Exchanging or repairing safety valves
  • Surface pretreatment, repainting and labelling of the tanks
  • Tests, including helium leak testing, liquid penetrant testing, x-rays, TÜV testing, and borescope pipe inspection

Surface pretreatment

Primed for excellence

We completely remove old paint, impurities and residual grease from your storage unit, employing an abrasive specially designed for cast steel. This ensures the storage unit’s surface offers excellent primer adhesion.

Surfaces are pretreated in our blast room. This is 75 m2 in size, providing ample space for all the most common sizes of storage unit. In the interests of environmental protection, we collect and reuse the abrasive agent. Paint, dirt and any pulverised blasting-agent particles are carefully removed, enabling the agent to be almost completely recycled.


Painting

We’ve got everything covered

After blast cleaning, we prime and paint your storage unit according to your specifications. The primer provides outstanding corrosion protection, ensuring excellent adhesion of the paint. Once painted, the unit is dried in the heated spray booth, and your logo is applied in accordance with your corporate design requirements. 

We can paint your unit any colour, with any coating thickness you specify. We use only high-quality paints that are extremely weather-resistant and durable.

The storage units are painted in a special spray booth equipped with an exhaust ventilation system. The booth is 75 m2, providing ample space for all the most common sizes of storage units. The exhaust ventilation system ensures excellent operating conditions, and high health and safety standards.


Vacuum systems repair

Expertise fills the vacuum

When overhauling and repairing your storage unit, we pay special attention to the vacuum jacket, since it is such a vital component. Based on the inspection status report, and any other customer-requested activities, the scope of the tasks might include:

  • Replacing the rupture disc (outer tank)
  • Refilling the perlite insulation
  • Replacing the vacuum pump connection

During evacuation, we electronically measure and record the pressure in the vacuum chamber. A graph of pressure development is plotted for 24 hours, and a printout added to the documentation for the storage unit.

Once repair work is complete, we either place the unit in storage with a primary pressure of 4 bar, or ship it to the customer with a primary pressure of < 2 bar. Gaseous nitrogen is normally used. We charge CO2 storage units with gaseous carbon dioxide.