Welding & fabrication standards
Demonstrate welding quality compliance with ISO 3834 certification and assessments for accredited and non-accredited fabrication operations.
Welding & fabrication standards
Challenges in welding practices
Welding is a critical process in the manufacturing and construction of pressure vessels, structural steel, piping, and other safety-relevant products. Poor welding practices can compromise product quality, safety, and regulatory compliance leading to failures, liability, and costly rework.
The ISO 3834 series provide an internationally recognized framework for welding quality management, ensuring consistency, traceability, and technical competence in fabrication. As industries demand higher assurance, certification to ISO 3834 becomes essential for suppliers aiming to meet global standards and project requirements.
How our welding services support you
DNV offers accredited and non-accredited ISO 3834 welding certification services, supporting manufacturers, fabricators, and engineering companies across multiple levels of welding quality requirements.
We provide assessment, certification, and surveillance services for the following ISO 3834 standards:
- ISO 3834-2:2021: Comprehensive quality requirements.
- ISO 3834-3:2005 & ISO 3834-3:2021: Standard quality requirements.
- ISO 3834-4:2005 & ISO 3834-4:2021: Elementary quality requirements.
Our services include evaluation of welding procedures, personnel qualifications, equipment capability, documentation control, and factory production systems in accordance with ISO 3834 principles.
Trusted experts in welding
DNV has extensive experience as a third-party certifier for welding-related systems across multiple industries, including energy, maritime, construction, and manufacturing. As a globally accredited certification body, we deliver impartial assessments and deep technical expertise in welding quality assurance.
Our flexible service model allows customers to certify under ISO 3834 as a standalone requirement or as part of broader regulatory compliance (e.g. EN 1090 or PED). With DNV, you gain access to global expertise with local delivery.
Benefits of our welding services
- Achieve recognized welding quality certification.
- Improve control over fabrication processes and contractor performance.
- Demonstrate capability to meet project or client specifications.
- Reduce defect rates and enhance production consistency.
- Strengthen supply chain assurance through documented compliance.
- Build internal competence in line with ISO 3834 standards.
