Always up-to-date: our quality and technology

As a high-performance medium-sized company, Kliewe is responsible for customers, employees and services. The company lives up to its values of quality, responsibility and humane working conditions. For more than 50 years, Kliewe’s customers have relied on a high level of expertise, great care and high-quality, long-term solutions. The quality of our work is ensured by our highly motivated and qualified staff, an integrated management system and underpinned by the following quality assurance systems and process tests:

Quality assurance

Quality systems according to DIN EN ISO 9001: 2015.

Procedure tests

Our procedure tests correspond to the following standards: DGR 97/23/EG, AD2000-Merkblatt HP0, EN 1090,
ISO 15614-1, DVGW-Fachunternehmen, Eindringprüfung Stufe 2 (Penetration Test Level 2), Sichtprüfung Stufe 2 (Visual Inspection Level 2) and the VDTÜV-Merkblättern.

Test methods

Containers, apparatus and pipelines manufactured by us fully comply with today’s quality and safety standards, the TÜV requirements according to the Pressure Equipment Directive (PED), the Ordinance on Combustible Fluids, Atex Explosion Protection and the Water Resources Act (WHG).

Certificates held by Kliewe GmbH:

DIN EN ISO 9001 (deutsch)

DIN EN ISO 9001 (englisch)

SCC (deutsch)

SCC (englisch)


DIN 2303

AD 2000-Merkblatt HP0

DIN EN ISO 3834-2

EN 1090-2

DVGW specialist company


DIN 11850 Fittinge

Eindringprüfung PT 2


Modul A DGRL QM-2014/68/EU (deutsch)

Modul A DGRL QM-2014/68/EU (englisch)

Sichtprüfung VT 2

Stahlrohr und Zubehör