Weld Inspection: Difference between revisions
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*[[Dye Penetrant Inspection]] | *[[Dye Penetrant Inspection]] | ||
**Involves cleaning the surface, applying a dyed fluid that seems into cracks etc, drying the surface with a cloth, then displacing the fluid with another, thus showing any cracks via the dye re-emerging from them | **Involves cleaning the surface, applying a dyed fluid that seems into cracks etc, drying the surface with a cloth, then displacing the fluid with another, thus showing any cracks via the dye re-emerging from them | ||
*[[Magnetic Particle Inspection]] | *[[Magnetic Particle Inspection]] ( [[Eddy Current Inspection]] ) | ||
**Similar to Dye Penetrant, but uses magnetic dust and electrically induced magnetism in the welded piece | **Similar to Dye Penetrant, but uses magnetic dust and electrically induced magnetism in the welded piece | ||
*[[Ultrasonic Testing]] | *[[Ultrasonic Testing]] | ||
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**Can either be manual "blip" on an oscilloscope based, assisted oscilloscope, or even a generated 3D Model (often done with [[Phased Arrays]] ) | **Can either be manual "blip" on an oscilloscope based, assisted oscilloscope, or even a generated 3D Model (often done with [[Phased Arrays]] ) | ||
*[[Radiography]] | *[[Radiography]] | ||
**Often | **Often referred to as "x-ray testing" but i think most use [[Gamma Rays]] (citation needed) | ||
**Same concept as the medical procedure, most seem to be film based however. | **Same concept as the medical procedure, most seem to be film based however. | ||
**Has the deepest depth of field (may not be best term, also compare to ultrasonic | **Has the deepest depth of field (may not be best term, also compare to ultrasonic | ||
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=External Links= | =External Links= | ||
* | *[https://en.wikipedia.org/wiki/Weld_quality_assurance The Wikipedia Page on Weld Quality Assurance] | ||
[[Category: Quality Control]] [[Category: Welding]] | [[Category: Quality Control]] [[Category: Welding]] | ||
Latest revision as of 04:47, 29 November 2021
Basics
- This page goes over the various ways of Quality Control in regards to welding
Non-Destructive Methods
- Visual Inspection
- Fairly Straightforward, just check that it is straight and consistent, also check for Porosity / Slag Inclusions
- Dye Penetrant Inspection
- Involves cleaning the surface, applying a dyed fluid that seems into cracks etc, drying the surface with a cloth, then displacing the fluid with another, thus showing any cracks via the dye re-emerging from them
- Magnetic Particle Inspection ( Eddy Current Inspection )
- Similar to Dye Penetrant, but uses magnetic dust and electrically induced magnetism in the welded piece
- Ultrasonic Testing
- Essentially the same concept as what is done for the medical procedure and/or Ground Penetrating Radar but with a welded joint
- Can get similar quality to radiography (citation needed though for this claim, add in later), but without the radiation source, associated precautions, and film developing (if not using a Digital X-Ray Process )
- Can either be manual "blip" on an oscilloscope based, assisted oscilloscope, or even a generated 3D Model (often done with Phased Arrays )
- Radiography
- Often referred to as "x-ray testing" but i think most use Gamma Rays (citation needed)
- Same concept as the medical procedure, most seem to be film based however.
- Has the deepest depth of field (may not be best term, also compare to ultrasonic
Destructive Methods
- Bend Test (Uses a Universal Test Machine , or even just a pneumatic / hydraulic press based jog to bend a weld joint. If it is up to the specified pressure it will bend, and the weld line should be clean/near nonexistent, if not it will deform and/or snap