In the field of conventional quality assurance VOGT Ultrasonics GmbH is your efficient partner. Competence, flexibility as well as prompt reaction
are our company’s features of performance.

Incoming and delivery inspections, the control of dimensional accuracy or the series accompanying quality assurance only represent a part of our range of performance.

Being well aware of the quality aspect we even use special testing processes, taking into account the customer’s specific requirements.

Site control
In the field of pipeline construction in conventional and nuclear facilities as well as for the oil/gas industry we put trained and competent personnel at your disposal being responsible for the incoming goods inspection, prepares the preliminary testing documentation and surveys the execution of the works during installation of the components and even presents the complete documentation.

Testing and Welding supervision

For revisions, reconstruction and new installations in the field of pipework construction we are in a position to make available welding specialists, specialists meeting the requirements of the pressure tank regulations and supervisors having level 3 qualification acc. to EN 473 for your projects.

For more complex final products, which require a
number of individual components, we may assist
with the incoming goods inspection of the supplied parts,
the inspection of parts from your own production and the
acceptance of the final product before delivery (final
inspection). Such inspections include the testing of
completeness of the parts, possible damages,
dimensional accuracy, testing of the materials, the
hardness and the surface condition as well as the
control of the supplied documentation as regard to
completeness and accuracy.

We also assist with external acceptance procedures being
carried out by an acceptance association and ensure for
an immaculate execution.

One of the central functions of quality assurance is the dimensional check
of various geometric measures of a part. Outer diameter, inner diameter,
wall thickness and length are inspected for compliance with customer
requirements (specs).

In many cases, control of dimensional accuracy can be very important.
Not only the measurement of the diameter is important, but also the
dimensional accuracy of the length of a part, bar material for example,
is often underestimated.

The allowed tolerances of a part or material can easily fall below only
by marking. Dimensional checks in connection with visual testing, clearly
offer the safety of dimensional accuracy, often only as one important
step in the process (intermediate checking) until completion, however
this way later complaints costs can be avoided.

The measuring equipment for such inspection are for example vernier
callipers, micrometer gauges and 3D-measuring machines.

Optical and visual testing, is a kind of non destructive testing where the test parts are visually checked. The following kinds of defects can be found with this inspection:

• impurities
• faulty or incomplete assembly, connection
• burr formation, untercuts and cracks
• change of colour (tarnishing with for example austenitic steels)
• surface roughness
• lack of fusion

Visual testing is limited to only detect defects on the surface of a test part.

In general hardness means the resistance which a body opposes to penetration of a harder penetrating body.

In the industry hardness testing is used for different purposes, e.g. in order to evaluate the hardness of material surfaces, to carry out material confusion testing, or for weld seams, which are needed for specific application.

Testing methods are:
The Brinell test of hardness when a ball with a testing load is pressed vertically into the surface, and afterwards the diameter of impression determines the hardness value.

For the Vickers pyramid hardness testing a test load is also pressed vertically into the surface, in this case the impression diagonal indicates the hardness value.

Furthermore, there are the Rockwell hardness test with initial load, the impact hardness test using a ball-type hammer (Poldi-hardness testing device ) and the resilience test of hardness, when a ball falls through a pipe onto the testing body and jumps up again (Equ-Tip).