QUALITY ASSURANCE WITH CERTIFICATES
& APPROVALS

Tested quality – also confirmed by neutral bodies!

Our aim is to ensure that our technologies and products meet the highest quality standards and are constantly being developed further. The benchmark here is the competitiveness of our products. Only through our high level of quality and process reliability can we ensure and promote this in the long term.

With modern testing equipment and qualified test personnel, we carry out material and component tests in accordance with your specifications and the relevant standards – whereby all tests can optionally also be carried out with external acceptance by certified acceptance companies .
We use our ERP system to manage more than 4,700 standards and customer-specific delivery specifications.

We know what we are doing – and we can prove this with the relevant certificates. Renowned inspection and classification societies have not only audited us, but also attest to our consistent implementation of the highest national and international quality standards.

We take responsibility

Dirostahl is facing up to the challenges of an increasingly complex and sensitive environment. Environmental protection, energy efficiency and the highest quality standards are therefore an integral part of our corporate policy and an important task of the company management.

We realize economic goals and ensure that we treat our environment with care. In addition to economic and technical requirements, production processes are checked for their environmental compatibility and energy efficiency. We have adopted the following environmental and energy policy in recognition of these interrelationships and our shared responsibility for environmental protection. It is binding for all employees and applies to all activities at Karl Diederichs GmbH & Co KG.

At a glance

  • Large number of national and international certificates and approvals
  • Guaranteed quality also through independent purchasing companies
Quality management
Dirostahl has provided proof of a seamless quality management system as part of an audit. The corresponding certificate acc. ISO 9001:2015 was issued by TÜV Rheinland.
Environmental management
Dirostahl has provided evidence of a practiced environmental management system as part of an audit. The corresponding certificate acc. ISO 14001:2015 was issued by TÜV Nord.
Energy management
Dirostahl has provided proof of a seamless energy management system as part of an audit. The corresponding certificate acc. ISO 50001:2018 was issued by TÜV Nord.

Our most important certificates and approvals