
ISO 3834 Welding System Certification targets the special welding process. It requires enterprises to integrate design, technology, production and quality assurance to establish a mature system so as to guarantee the final quality requirements of products. Based on ISO 9001 and combined with practical welding application conditions, ISO 3834 certification specifies welding quality requirements that shall be covered by a welding quality assurance system.
ISO 3834 consists of three parts:
Part 1 provides criteria for selecting the appropriate level of quality requirements. In accordance with product standards, specifications, codes or contracts, ISO 3834-2, ISO 3834-3 or ISO 3834-4 shall be selected corresponding to the level of quality requirements.
Part 2 specifies different levels of quality requirements, namely: ISO 3834-2 Comprehensive quality requirements, ISO 3834-3 Standard quality requirements, ISO 3834-4 Elementary quality requirements. Where a manufacturer complies with a specified quality level (e.g. ISO 3834-2), it may be regarded as complying with all lower quality level requirements (e.g. ISO 3834-3 or ISO 3834-4) without further verification.
Part 3 covers documentation required for compliance with each part, i.e. documents required to verify compliance with the quality requirements of ISO 3834-2, ISO 3834-3 or ISO 3834-4.
Experts from HWD-HuaWayDa can carry out various tests and provide a full range of welding services to offer all the support you need. Our services include the following aspects
1) Supplier welding qualifications and certificates – Evidence of compliance with welding quality system
2) Certification of welding quality assurance system – Welding Quality System Certificate (ISO 3834)
3) Welding expert reports and welding procedure qualification – Qualification Reports (ISO 15614)
4) Welding consultancy, e.g. inquiries related to design, engineering and pipeline welding technology.
5) Metal inspection, monitoring and certification
6) Failure inspection and metallographic examination of metal components
7) Welder Certificates (Domestic and International)
Training courses offered at welding technical schools
Welder training courses – including in-house training – Oxy-fuel welding, SMAW, MIG, MAG and TIG welding processes
8) Technology and Consultancy
Qualification and testing of operators for handheld welding machines and equipment in accordance with applicable specifications; additional certification for welder qualifications pursuant to Directive 97/23/EC (Pressure Equipment)
ISO 3834 specifies comprehensive quality control for welding. The main audit requirements are as follows:
Technical review and requirement review;
Subcontracting;
Welding personnel;
Inspection and testing personnel;
Equipment;
Welding and related activities;
Welding consumables;
Storage of parent materials;
Post-weld heat treatment;
Inspection and testing;
Nonconformities and corrective actions;
Calibration and verification of testing, measuring and inspection equipment;
Identification and traceability;
Quality records.
HWD | HuaWayDa is a comprehensive third-party service institution integrating inspection, testing, metrology, certification, training and enterprise technical services. It consists of Management Center, Marketing & Customer Service Center, Laboratory, Certification Center, Management Institute, Sustainable Development Center and Enterprise Service Center, and is committed to providing customers with professional, efficient and authoritative one-stop enterprise solutions.
HWD | HuaWayDa holds CNCA approval certificate, CMA qualification, measurement standard assessment certificate, CNAS accreditation and other relevant qualifications.
We strive to build long-term and mutually trustful partnerships with clients. We are not merely a service provider for your current projects, but also a reliable think tank and companion on your journey to pursue excellent management.
Choosing us means you are not only selecting a service, but also a long-term partner rooted in professionalism with your success as our mission. We promise to help you build a solid management foundation and sustainable competitive advantages with our professional capabilities.

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