60 Questions
What is the classification number for Metal Inert Gas (MIG) welding according to EN ISO 4063?
#131
What is the composition accuracy for minor constituents from 5 to 50% (by volume) of shielding gases?
$\pm 10%$
What is the designation for the gas composition 90% Ar - 10% CO2?
M21
What is the welding position standard according to EN ISO 6947?
EN ISO 6947
What does WN 10570 describe?
Visual inspection requirements, symbols and dimensioning, and shielding gases for arc welding of steel components
What is the purpose of assessment groups in WN 10570?
To assign appropriate acceptance criteria level for welds based on design and service requirements
What is the significance of WN 10570-E?
It allows certain irregularities in welds due to production conditions and does not require volumetric inspection
What does Annex A of WN 10570 specify?
Recommended assessment groups for lift truck components based on design and safety requirements
What certification must manufacturers hold for welding company requirements?
EN ISO 3834
Which assessment groups require welded components to be traceable back to the welder?
EN ISO 5817 assessment groups 'B' or 'C'
What is required to qualify welds classified as EN ISO 5817 assessment groups 'B' or 'C'?
Preproduction welding test in accordance with EN ISO 15613
When are tolerances required for production not applicable?
Robotic welding
How is compliance with other standards verified?
By showing equivalence to the standard used
What does the standard EN 22553 include?
Practical rules and application for drawing up weld seam tables
What does the standard cover regarding symbols and dimensioning?
Basic, composite, and supplementary symbols
What is included in the standard regarding the side of the joint and dimensioning of welds?
Rules for depicting the side of the joint and dimensioning of welds
What does the standard specify regarding the range of application for welding processes?
Range of application for welding processes, shielding gases, and filler materials used
Where can the base metals for welding be found in the standard?
Annex B of the standard
What does the standard provide regarding welding methods?
Terminology and requirements for welding methods
What is the maximum magnification for examining imperfections per EN ISO 5817?
10X
What should the inspector assure regarding the size, length, and location of welds?
Conformance to the requirements of the drawings
When are limits for multiple imperfections applicable according to EN ISO 5817?
Only when requirements for a single imperfection are not exceeded
What is the purpose of using visual aids such as auxiliary lighting and magnifiers in visual welding inspection?
To closely evaluate irregularities in welds and base metals
What is the assessment criteria for weld discontinuities and defects in visual welding inspection?
EN ISO 5817
What should the inspector check regarding the size and contour of welds in visual welding inspection?
Size and contour
What is the maximum distance for two adjacent imperfections to be considered as a single imperfection?
Twice the major dimension of the smaller imperfection
When are visual aids such as auxiliary lighting and magnifiers required in visual welding inspection?
When necessary to more closely evaluate irregularities in welds and base metals
What is the term used to describe an interruption of the typical structure of a material, such as a lack of homogeneity in its mechanical, metallurgical, or physical characteristics?
Discontinuity
Which type of crack is generally considered to be the most critical type of discontinuity in welding?
Longitudinal
What is the acceptance criteria for cracks according to EN ISO 5817?
Not permitted
What is the acceptance criteria for cracks according to AWS D14.4?
None
What is another term for Incomplete Fusion (IF) as per EN ISO 5817?
Lack of Penetration (LOP)
What is the acceptance criteria for Incomplete Fusion (IF) according to EN ISO 5817?
Not permitted
What is the acceptance criteria for Incomplete Fusion (IF) according to AWS D14.4?
Sum of all indications shall not exceed 1 in [25 mm] in 12 in [300 mm]
What is the alternate term for Incomplete Joint Penetration (IJP) as per EN ISO 5817?
Lack of Penetration (LOP)
What is the acceptance criteria for Incomplete Joint Penetration (IJP) according to EN ISO 5817?
Not permitted in CJP welds
What is the acceptance criteria for Incomplete Joint Penetration (IJP) according to AWS D14.4?
1/3T or ½ in [13 mm] maximum length
What is the acceptance criteria for inclusions with GMAW according to EN ISO 5817?
Not permitted on surface; some amounts permitted subsurface
What is the acceptance criteria for inclusions with GMAW according to AWS D14.4?
Not permitted on surface; some amounts permitted subsurface
What is the maximum permitted root opening for fillet welds according to EN ISO 5817?
1/64 in [0.5 mm] + 0.1a
What is the definition of fillet weld size for equal leg fillet welds according to VT Application - ISO 5817?
The leg lengths of the largest isosceles right triangle that can be inscribed within the fillet weld cross section
What feature of a convex fillet weld limits the maximum size of the inscribed triangle?
Leg length
What does the measurement technique for fillet weld size need to be capable of determining?
The size of the inscribed triangle
What does the standard EN ISO 5817 specify regarding arc strikes?
Arc strikes are to be avoided. If present, they shall be ground flush and checked to assure soundness
What do fillet weld gages need to account for according to VT Application - ISO 5817?
Different shapes of fillet weld profiles
What is the maximum permitted for measurement of convex fillet welds according to VT Application - ISO 5817?
5/8 in
What is the purpose of measuring the triangle inside the fillet weld according to VT Application - ISO 5817?
To determine the fillet weld size
What does the standard EN ISO 5817 specify regarding spatter?
Metal particles expelled during fusion welding that do not form part of the weld
What is the maximum permitted root gap for fillet welds according to AWS D14.4?
3/16 in [5mm]; when > 1/16 in [2 mm] required leg size shall be increased by amount of the gap
What is the definition of porosity in welding?
A cavity-type weld discontinuity formed by trapped gas during solidification
What does undercut refer to in welding?
A groove melted into the base metal adjacent to the weld toe or root
What is the definition of overlap in welding?
The protrusion of weld metal beyond the weld toe or root
What is the definition of convexity in fillet welds?
The excess weld metal in butt welds
What is the definition of weld reinforcement in butt welds?
Excess weld metal in butt welds
What is the definition of arc strike in welding?
A discontinuity resulting from an arc
What is the acceptance criteria for porosity according to EN ISO 5817?
Maximum single pore size and maximum cluster diameter
What does underfill refer to in welding?
Incompletely filled groove weld condition
What is the specific acceptance criteria for undercut according to EN ISO 5817?
Maximum depth
According to EN ISO 5817, what is the acceptance criteria for overlap?
Not permitting overlap
What does visual inspection of welds according to ISO 5817 include?
The evaluation and measurement of different discontinuities and weld conditions using specific tools and criteria
Study Notes
Welding Standards and Symbols: Key Highlights
- Manufacturers must hold EN ISO 3834 certification for welding company requirements
- Welded components in compliance with EN ISO 5817 assessment groups "B" or "C" shall be traceable back to the welder
- Welds classified as EN ISO 5817 assessment groups "B" or "C" shall be qualified using a preproduction welding test in accordance with EN ISO 15613
- Tolerances required for production are not applicable for robotic welding
- Compliance with other standards must show equivalence to the standard used
- Compliance with the standard is verified through visual inspection or measuring representative sections
- The standard is an extract from EN 22553 (~ ISO 2553) and includes practical rules and application for drawing up weld seam tables
- Symbols and dimensioning are covered in the standard, including basic, composite, and supplementary symbols
- Rules for depicting the side of the joint and dimensioning of welds are included
- The standard specifies the range of application for welding processes, shielding gases, and filler materials used
- Annex B of the standard lists the base metals for welding
- The standard provides terminology and requirements for welding methods
Visual Inspection of Welds According to ISO 5817
- Porosity is a cavity-type weld discontinuity formed by trapped gas during solidification, with types such as isolated, scattered, piping, elongated, aligned, and cluster.
- Acceptance criteria for porosity according to EN ISO 5817 includes maximum single pore size and maximum cluster diameter, with different limits for weld width.
- Undercut is a groove melted into the base metal adjacent to the weld toe or root, with specific acceptance criteria for maximum depth according to EN ISO 5817 and AWS D14.4.
- Underfill refers to incompletely filled groove weld condition, with acceptance criteria for maximum depth according to EN ISO 5817 and AWS D14.4.
- Overlap is the protrusion of weld metal beyond the weld toe or root, with EN ISO 5817 not permitting overlap and AWS D14.4 allowing none.
- Convexity in fillet welds has specific acceptance criteria for maximum permitted dimensions according to EN ISO 5817 and no limit according to AWS D14.4, controlled by the limit on toe reentrant angle.
- Weld reinforcement is the excess weld metal in butt welds, with specific acceptance criteria based on the angle of reinforcement for both EN ISO 5817 and AWS D14.4.
- Arc strike is a discontinuity resulting from an arc, with specific characteristics and associated processes.
- Visual inspection of welds according to ISO 5817 includes the evaluation and measurement of different discontinuities and weld conditions using specific tools and criteria.
- Different acceptance criteria and limits for various discontinuities and weld conditions are outlined in ISO 5817 and AWS D14.4, providing standards for weld quality assessment.
- The evaluation of welds according to ISO 5817 involves understanding the specific characteristics and measurement methods for different discontinuities and weld conditions.
- ISO 5817 sets specific standards and criteria for the visual inspection and evaluation of weld discontinuities and conditions, providing guidelines for assessing weld quality.
Test your knowledge of welding standards and symbols with this quiz. Explore key highlights such as EN ISO 3834 certification, EN ISO 5817 assessment groups, preproduction welding tests, robotic welding tolerances, visual inspection, and more.
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