Coded Welder (EN ISO 9606) flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

EN ISO 9606-1

The part of EN ISO 9606 that specifies requirements for qualification testing of welders for fusion welding of steels.

Essential variable

A welding condition that, if changed, requires requalification of the welder. Examples include process, material group, consumable, position, thickness, and joint type.

Qualification range

The limits within which a qualified welder may work without requalification. It is defined by the essential variables tested.

Test piece

The assembly of plates or pipes welded by the welder for the purpose of qualification testing, prepared according to the WPS.

Process 111

Manual metal arc welding (MMA) with a covered electrode, designated according to EN ISO 4063.

Process 135

Metal active gas welding (MAG) with a consumable electrode and active shielding gas, designated according to EN ISO 4063.

Process 141

Tungsten inert gas welding (TIG) with a non-consumable tungsten electrode and inert shielding gas, designated according to EN ISO 4063.

Process 311

Oxy-fuel gas welding, a fusion welding process using a gas flame, designated according to EN ISO 4063.

Material group

A grouping of materials (e.g., steels) based on their welding characteristics, used to define qualification ranges in EN ISO 9606-1.

Consumable change

Changing from one type of consumable (e.g., rutile to basic electrode) may require requalification unless covered by the qualification range.

Position qualification

Qualification in a specific welding position (e.g., flat, horizontal, vertical, overhead) covers other positions as defined in the standard.

Thickness qualification

Qualification on a test piece of thickness t qualifies a range of thicknesses, typically from t to 2t for t ≥ 6 mm.

Joint type qualification

Qualification on a butt joint covers fillet welds within limits; qualification on a fillet weld does not cover butt welds.

Test piece length

For butt welds in plates, the test piece shall be of sufficient length to allow extraction of test specimens, typically at least 350 mm.

Pipe test piece diameter

The diameter of the pipe test piece shall be within the range to be qualified; minimum diameter may be 25 mm.

Joint preparation

Edges shall be prepared (e.g., V-groove) according to the WPS; for fillet welds, two plates are assembled at right angles.

Welding according to WPS

The welder shall perform the test weld in accordance with the welding procedure specification, including preheat and welding parameters.

Visual examination

The first test performed on the completed weld to check for surface imperfections, with acceptance criteria according to EN ISO 5817.

Radiographic testing

A non-destructive test used to detect internal imperfections in butt welds, with acceptance criteria according to EN ISO 5817.

Bend testing

A destructive test where root and face bend specimens are bent to assess ductility and soundness; typically two root and two face bends.

Macro examination

A cross-sectional examination of the weld to reveal weld profile, penetration, and internal imperfections, required for fillet welds.

Fracture testing

A test for fillet welds where the weld is fractured to assess throat thickness and fusion; the fracture surface is examined for defects.

EN ISO 5817

The standard that specifies quality levels for imperfections in fusion-welded joints, used as acceptance criteria for welder qualification tests.

Quality level B

The most stringent quality level in EN ISO 5817, typically required for welder qualification, with strict limits on imperfections.

Bend test acceptance

After bending, no crack or defect exceeding 3 mm in any direction, and no open defect exceeding 1 mm, unless otherwise specified.

Period of validity

The duration for which a welder qualification is valid, typically 2 years, subject to 6-monthly confirmation by the employer.

6-monthly confirmation

The employer shall confirm every 6 months that the welder has been continuously working and that the qualification remains valid.

Revalidation

The process of renewing a welder qualification after it has expired or after a long interruption, by a new test or as specified.

Certificate of qualification

A document issued to the welder, containing personal details and the qualification ranges, endorsed every 6 months by the employer.

Qualification Test Record (QTR)

A record containing all essential variables, test piece details, welding parameters, and test results, signed by the examiner and welder.

PPE for welding

Personal protective equipment including welding helmet with appropriate filter, flame-retardant clothing, gloves, and safety boots.

Fume extraction

Local exhaust ventilation or respiratory protection used to keep welding fume exposure below occupational exposure limits.