Terms in this set (311)
WJ-1 (visual cleanliness) is ISO SA 3
comparable to which
abrasive blast cleaning
standard?
*attaches using vacuum, cables or magnets
*Vertical, Horizontal or overhead surface
Robotic water jetting
*Controlled by single operator
includes
*Collects in excess of 95% of the water, removed
coatings and rust (waste generated)
*Nozzle operator
A typical waterjetting team
*Pump Operator
consists of?
*Additional operators or workers as required
Considerations with Back *Causes Fatique
Thrust are: *Should be no more than 1/3 of operators body weight
*work area is properly barricaded
*Electrical equipment protected from water
*Electrical connections are not allowed to sit in water
*All fittings and hoses are in good condition / proper
pressure rating
Safety considerations
*Nozzles are free of obstructions
before waterjetting are
*System is flushed clean and air removed
*The dump system and all control systems are
operational
*Proper LockOut/ TagOut provisions in place
*Confined entry requirements addressed
, *Worker Safety
*Worker air quality
Waterjetting advantages *Less stringent respiratory requirements
include? *No dust or contamination or clean up
*Environmentally friendly
*Requires less cleanup
*Waterjetting does not leave a surface profile
*Equipment is very expensive
*Danger of Ultra High Pressure hose breaking
Waterjetting disadvantages
*Danger of injection into the skin or serious cuts
include:
*Collecting and disposing of the contaminated
Water
*Proficient operators needed
Cause of Blistering on Oil, moisture and / or grease
coatings?
Saturation point drops as? Air is compressed, making air wetter
Check compressor for Moisture traps, inter cooler and aftercooler
water contamination at?
Common Hot Dipped (HD) Cracking, peeling, bare spots, lumps, Blisters, flux
inspection defects inclusions, ash inclusions and dross inclusions
*Destructive test instrument
*Used on non-magnetic or nonferrous
Substrate
Describe what a Tooke
*has illuminated 50x microscope
Gage is and some models
*good from 0-100 mils
*Groove cut through coating
*Models are Mark II and Mark III
Centrifugal blast machine *Abrasive starved wheel or
showing low amperage *Flooded or choked wheel
could indicate?