Quality assurance is the leitmotif for all areas of our operational procedures and manufacturing processes. In the past optional, today a must.

In order to meet the growing requirements, rules which are binding for everyone were established for all operational procedures, not only for the production processes, but also for the commercial and technical procedures.

The ISO 9001 Certification for BOLZ Apparatebau GmbH has been achieved in April 2003.


To meet the requirements according to DIN EN ISO 9001, EN 729 and HP-0 a quality manual was created already in the year 2000. Herein the operational procedures, test methods and test instructions are recorded and regulated.

Particularly during manufacturing, our products are continuously accompanied by quality assuring checks. Thus all incoming material which is going to be processed is checked, re-stamped and verified by appropriate material certifications. As far as welding is concerned, procedure checks which are approved by the TÜV are executed, welding instructions are handed to the individual workers and welders must pass exams. In addition to the general checks related to welding, non-destructive tests are made during the manufacturing process of the products such as radiographs and dye penetrant tests .


It is needless to say that a final inspection of the finished product takes place including checks for measure accuracies, leak tests, surface measurements and material stampings, which are supervised additionally by the TÜV. For all these and many other quality-assurance checks, files and logs are created, which are collected and archived all together in the final documentation of each product manufactured by us. This is the only way to ensure a traceable record of the manufacture of our products, even after many years.