KARL WEISS
Our Certifications

Certifications

The quality of the completed work, the qualification and reliability of the employees and the performance of KARL WEISS Technologies GmbH can be proven by numerous certificates.

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DIN EN ISO 9001
Integrated Management System
according to DIN EN ISO 9001

Quality at the highest level
DIN EN ISO 9001 forms the basis for the continuous improvement process of the company's internal quality management system. Our high quality requirements are met by consistent application of our quality management in all areas of the company and is supported by all employees.

DIN EN ISO 14001
Environmental Management System
according to DIN EN ISO 14001

Sustainable development and social responsibility
Environmentally responsible management is more important than ever before. The environmental management system according to DIN EN ISO 14001 enables KARL WEISS Technologies GmbH to develop and implement environmental policy and corresponding objectives.

DVGW-Arbeitsblatt GW 301
DVGW Expert Company
according to DVGW worksheet GW 301

Proven qualification for open-trench pipeline construction
In addition to highly developed materials and processes, qualified employees are the most important key resource for building, operating and expanding high-performance pipeline networks. For this, we are certified as a specialist company by DVGW according to worksheet GW 301.

nach DVGW-Arbeitsblatt GW 302
DVGW Expert Company
according to DVGW worksheet GW 302

Proven qualification for trenchless pipeline construction
KARL WEISS Technologies GmbH is certified by DVGW according to worksheet GW 302 as a specialist company for the trenchless reloading (group GN) and rehabilitation (group R1 + R2) of non-operational pipelines gas and water pipelines.

Zertifikat für Arbeitsschutz mit System
Systematic work safety in construction by the BG Bau

Systematic work safety in construction
We attach great importance to health and safety. For this, we use the AMS BAU sector-specific occupational health and safety management system and are certified by the professional association of the construction industry.

AGFW FW 601
Requirements for pipeline construction companies according to AGFW worksheet FW 601

Qualified pipeline construction long-distance heating
The certificate according to worksheet FW 601 of the Arbeitsgemeinschaft Fernwärme e.V. certifies the existing expertise, efficiency and reliability for the construction of long-distance heating pipes.

KanalBau
Certificate for manufacturing and maintenance
of wastewater pipes and ducts

Expertise and reliability in sewer construction
With the fulfillment of the requirements of the quality and test provisions RAL-GZ 961, KARL WEISS can demonstrate special technical qualifications (technical knowledge, technical performance and reliability). We are the quality mark holders of the following assessment groups: AK1; VM; VP; S21.1; S21.3; S27.3; S52.1; I; R; D

TÜV
Certification as a recognized specialist company
according to the Federal Water Act

For the protection of water resources
TÜV Rheinland AG has certified KARL WEISS Technologies GmbH as a specialist company in the sense of the Federal Water Act. As a result, we are qualified to manufacture bored piles as well as to install, set up, repair, install and clean drainage systems in the area of LAU and HBV systems.

DIN EN ISO 3834-3
Welding qualification requirements
according to DIN EN ISO 3834-3

Proof of competence for welding engineering manufacturing companies
The ISO 3834 standard specifies the principles for quality assurance of welded products. Our corresponding certification according to ISO 3834 documents the high quality of our welded products.

Schweißzertifikat EXC 2 nach EN 1090-2
Welding certificate
class EXC 2 according to EN 1090-2

Welding of steel structures
Welding certificate in accordance with EN 1090-1 for the welding of steel structures according to DIN EN 1090-2, EXC 2. This ensures the traceability of the materials used as well as the presence of qualified welding instructions, tested welders and welding engineers.

EN 1090-1/2 EXC 2
Steel structures
according to EN 1090-1/2 EXC 2

Conformity of intern factory production control
The intern factory production control defines the continuous self-monitoring of our welded products. This ensures that the load bearing components and kits for steel bearers placed on the market have the declared performance characteristics.

RAL Gütezeichen 507
Certified Quality Assurance Provider for Liquid Soils according to RAL quality mark 507

Liquid soil according to RAL quality mark 507
KARL WEISS Technologies GmbH is the bearer of the RAL quality mark 507 - Liquid Soil (assessment group A2, H4) and is authorized to manufacture and install liquid soil. There is a close partnership with Berliner Flüssigboden GmbH.

PQ
Certificate of Prequalification
of companies in construction

Association for the Prequalification of Construction Companies
The Association for the Prequalification of Construction Companies operates a prequalification system for companies in the construction and construction industry in the award of public building contracts in Germany. KARL WEISS Technologies GmbH pre-qualifies for professional knowledge, reliability and performance.

Connexio
Certification as
pre-qualified supplier

Prequalified supplier
Connexio is a qualification system for energy suppliers, network operators and municipalities in Europe. Our Connexio certificate proves that, as a supplier and a construction company, we meet the legislation and the corporate principles of our contracting authorities.