Creating confidence in the quality of our products is our formula for success. Our paramount goal is ensuring the quality of our products and services. In order to meet these requirements, we constantly analyse process sequences and consistently implement the measures required for process improvement.

To support all measures, we make use of our DIN EN ISO 9001 : 2015 quality management system, introduced in 1995. Furthermore we are qualified according to EC Pressure Equipment Directive 2014 / 68 / EU and also certified in accordance with DIN EN ISO 3834-2.

The following certificates are available for download:

DIN EN ISO 9001-2015

Certificate 2014 / 68 / EU

DIN EN ISO 3834-2 Fusion welding + NDT Testing (Document in German)


Protection of the environment is an integral part of our company philosophy and thus an obligation to not only keep, but to consolidate and extend the standards we achieved.

Therefore we have a certified environmental management system since 1997.

A constant audit of our environmental management system is performed by an environmental auditor from TÜV Nord Cert GmbH with regard to requirements for environmental protection according to DIN EN ISO 14001.

DIN EN ISO 14001 : 2015

Energy management

Efficient energy management is not only an end in itself. It is part of the corporate claim to save resources and protect the environment.

Our well-functioning energy management system was enhanced in accordance with the requirements of the DIN EN 50001 : 2011.

DIN EN 50001 : 2011

© Dörrenberg 2013