Coded Welder (EN ISO 9606) study guide
Coded Welder (EN ISO 9606) · Work through your exam, one topic at a time.
The Coded Welder qualification under EN ISO 9606 is the European framework through which a welder demonstrates, on a physical test piece, that they can produce sound welds to a defined procedure. It is aimed at working welders in fabrication, construction, pipework, pressure equipment and repair, and it is normally pursued because an employer, a client specification or a notified body requires documented proof of competence. The Coded Welder (EN ISO 9606) study guide has 9 sections and about 2,933 words.
01Scope, Normative References and Definitions of EN ISO 9606
EN ISO 9606 is the qualification-testing standard for welders - it establishes that a welder can produce welds meeting a defined quality level on a specified test piece. It is a personnel qualification standard, deliberately separate from procedure qualification (EN ISO 15614) and from quality-management requirements.
404 words, about 2 min02Welding Processes and Process Designations Covered (111, 135, 141, 311, etc.)
EN ISO 9606 uses ISO process numbers (the 3-digit codes from EN ISO 4063) because the qualification is process-specific. A welder qualified with one process is not automatically qualified with another.
334 words, about 2 min03Essential Variables and Qualification Ranges
A welder qualification is only valid within a range. The essential variables are: Process (and any combination).
343 words, about 2 min04Test Piece Preparation, Dimensions and Welding of the Test Assembly
The test piece must be prepared to the dimensions and joint geometry specified in the relevant part of EN ISO 9606. Preparation includes edge preparation (bevel angle, root gap, root face), cleaning, and fit-up.
361 words, about 2 min05Examination and Testing of Test Pieces
After welding, the test piece is examined by a sequence of methods: Visual examination (VT) - first and always. Looks for surface defects: cracks, undercut, porosity, incomplete fusion, spatter, profile.
301 words, about 2 min06Acceptance Criteria and Evaluation of Test Results
Each test method has acceptance criteria in the relevant part of EN ISO 9606 (often referencing EN ISO 5817 quality levels). Typical criteria: VT : no cracks, no incomplete fusion, limited undercut, limited porosity, acceptable profile.
316 words, about 2 min07Validity, Period of Validity, Confirmation and Revalidation
A welder qualification certificate has a defined period of validity (commonly two years, but confirm against the current edition and part). During that period the qualification remains valid provided the welder continues to work within the qualified range.
300 words, about 2 min08Certification, Certificates and Qualification Test Records (QTR)
The certificate is issued by the examiner or examining body after successful testing. It must identify: the welder (name, identification), the standard and part used, the process(es) and any combination, the base material group, the consumable, the position and direction, the thickness range qualified, the joint type, the test piece details and test results, the date and period of validity, the examiner's identification and signature.
275 words, about 1 min09Health, Safety and Good Workshop Practice During Qualification Testing
Qualification testing happens in a workshop under realistic conditions. Safety and good practice are part of the assessment because a welder who ignores them is not competent in the full sense.
299 words, about 1 min