Term
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Definition
| 1. Destructive 2. Non- destructive |
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Term
| Types of Non- destructive testing |
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Definition
| visual, magnetic particle, ultrasonic, video, photographic |
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Term
| what is destructive testing |
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Definition
| This procedure requires that a sample of a particular material, process, fastening or fitting is subjected to bending, twisting, impact testing or some other form of testing that will destroy its usefulness for any further service. |
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Term
| what is Non-destructive testing |
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Definition
| This method determines the quality of a component, without altering or changing its physical qualities or usefulness. Unlike destructive testing, this method allows the item to be fully inspected without damage to its physical structure |
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Term
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Definition
-Diver is primary inspector
-Most widely used means of inspection
-Prime means of NDE
-Stereoscopic view, color recognition
-The start point for all other testing or inspections |
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Term
| describe magnetic particle testing |
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Definition
| The area to be inspected is magnetized and a magnetic particle rich “ink” is applied, the particles are drawn to the surface or near surface defect and are made visible with an ultra violet light |
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Term
| magnetic particle testing cant be used on? or is difficult to use on? |
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Definition
-Hard to use on rough surfaces
-Cannot be used on non ferrous metals |
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Term
| how does Ultrasonic Testing work? |
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Definition
| Thickness measurements are obtained by measuring the time required to send sound through material |
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Term
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Definition
-Allows for the inspection of thick pieces of steel, only the surface needs to be accessed
-High degree of skill required to interpret the results |
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Term
| what are 4 Stages of Inspection on a structure or part over time? |
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Definition
| by manufacturer, as being built, once installed, routine |
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Term
| Areas/ Defects during Inspection- |
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Definition
| gross structural defects, marine fouling, debris fouling, corrosion, surface and internal weld defects |
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Term
| gross structural defects are ? |
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Definition
-Serious dents, buckling or deformation
-Missing members, components, lost or badly corroded anodes
-Paint coatings or cladding removed or damaged
-Damaged cabling and ducting
-Cracked pile grouting
-Unstable foundations, scouring or settlement
-Spalling of concrete
-Bolts missing from assemblies
-Lost or displaced instrumentation |
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Term
| effects of marine fouling is |
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Definition
-Increase of deadweight, wave loading, and drag
-Exaggeration or lessening of corrosion
-Concealment of features or defects
-Blockage of intakes
-Fouling of moving parts
-Fouling of instrumentation |
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Term
| 2 types of marine fouling are ? |
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Definition
-1 Soft
-Easy to remove but important due to their bulk
-2 Hard
-Harder to remove due to their density
-Able to constrict flow and instrumentation |
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Term
| types of soft marine fouling |
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Definition
Algae
Bacteria
Sponges
Sea squirts
Hydroids
Sea weeds
Bryozoa
Anenomes
Deadmens fingers |
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Term
| types of hard marine fouling |
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Definition
Barnacles
Mussels
Tube worms |
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Term
| Results of marine fouling- |
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Definition
| change of water flow around structure, blockage of intakes/ outfalls |
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Term
| Environmental conditions on marine growth- |
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Definition
| sunlight, food in water, depth of water, temperature of water |
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Term
| General Visual Inspection |
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Definition
1. Marine growth inspection- clear concise terms, correct terms/ references
2. Protective coatings- extent/ depth of pitting, nature/ extent of blistering, take sample of blister
3. Cleaning- air/ silica up to 600 mm from weld, metal brush 75mm
4. Stand off photography- physical damage/ debris, report/ log each photo
5. Taut wire damage survey- at least 2 planes at right angles to each other ( photography) |
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Term
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Definition
| blistering, flaking, cracks, weathered scraping |
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Term
| fouling causing Metal loss |
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Definition
| flaking, pitting, rust, abrasions |
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Term
| fouling causing Member deterioration |
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Definition
| twisting , bending, denting, buckling, broken |
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Term
| fouling causing Connection Deterioration |
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Definition
| missing/ broken bolts, strength, loose, spaces, broken welds |
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Term
| sings of Corrosion of rebar |
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Definition
| same as loss, rust stains on concrete |
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Term
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Definition
| shape ( impact/ overloading) |
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Term
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Definition
| cracks Loss- Spalling ( bad mix/ moisture/ frost), abrasions ( bumpers/ fenders/ ice), chips |
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Term
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Definition
Rot- discoloration, organic growth, disintegration
-Water logged-sinks
-Timber loss- debris, ice, abrasions, smoothing
-Member deformation- warped, twisted, split, bent, cracks, splinter |
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Term
| Rubber/ Fiberglass fouling |
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Definition
-Cracks- chemical, melting, distortion
-Member deformation- twisted, dents, warped, crimped |
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Term
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Definition
-Mechanical- chipping, cracking
-Chemical- general disintegration
-Water logged- discoloration, sinks |
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Term
| when reporting concrete condition/fouling you report? |
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Definition
| cracking/ spalling-shape, orientation, length, depth, size, width |
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Term
| when reporting condition of steel or fouling you report? |
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Definition
-member deterioration/ metal loss/ general- shape, location, deformation, size
-Corrosion-remove blister/ growth, type of corrosion, pitting, flaking, location, size |
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Term
| when reporting condition of timber or fouling you report? |
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Definition
- breakage- size, shape, orientation, location, core drill
-Cracking-size, shape, orientation, location, depth, width
-Rot-(top of pile/ water line/ bolt holes/ connections)- remove growth, brackets, sheathing, collars- core sample/soundings/ probe
-Weathering-grey, cracking, warping- core drill, sounding
-Marine borer attack- tube worms, marine animals |
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