TÜV

In this field we carry out more than 10,000 tests on various pressure vessels every year. On the one hand, this involves conventional TÜV testing on steel, composite and aluminium cylinders with a volume of 0.3 – 80 litres.

This includes the:

• Dismantling of the equipment (with possible pre-drying and de-oiling) such as valves + feet + trays and bridges
• internal jet cleaning, if required by TÜV – to clean or remove corrosion of the inner surface
• Water pressure test with subsequent fabric air drying
• Approval by an employee of TÜV-Berlin/Brdbg. … and logging
• Assembly of the pressure vessels with valve and equipment
• Sealing of the embossed areas and the application of an identification mark for the next TÜV.

Additional services in the form of ultrasound examinations and crack-free tests are just as possible as the subsequent filling of the bottles with air 200 and 300 bar via our certified Bauer Pure-Air filling system as is the receipt of nitrox mixtures.

On the other hand, we are able to test composite cylinders with the 2 at 80 liters. Here the pressure test is carried out in specially developed water-jackets with subsequent air drying and application of the test adhesive.

Internal blasting

Since the 1990s, the TTB has had a facility approved by TÜV Berlin-Brandenburg and approved for the internal blasting of steel and aluminium cylinders. This enables us to remove impurities in the form of iron and aluminium oxides (commonly known as rust) as well as light oiling within a few minutes. The blasting material used here is guided and cleaned in a closed system. A continuous axial and linear movement of the blasting head guarantees a uniform blasting process and thus a uniformly cleaned surface.

In the following pictures we see a two-part cutaway model. The internal condition before and after internal blasting is clearly visible. On the left the pressure vessel with completely corroded surface, on the right the same vessel after cleaning.

The metallically clean surface produced by internal blasting enables us to work with an additive which is added to the test medium water. With “OmniCOR 338” a largely stable corrosion-free condition inside the tank is achieved.

In contrast to the roller burnishing of bottles, the blasting process produces a one-to-one image of a possible damage pattern. Craters, cracks or spot corrosion are made clearly visible in contrast to other methods and enable the TÜV expert to make an exact assessment of the internal condition of the bottle or container.

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