Archive | May, 2008
Paint Removal
Seems like paint removal ought to be a simple concept, right? But how much paint do you remove to remove half of the paint? How do you sample an area to show that you left 75% of a coating?
Continue reading...Terminology
16. May 2008
When is clean clean? What is clean water? What does profile really mean? When is salt salt? What are bulk properties versus surface properties? These are just a few of the areas where terminology confuses standards languages.
Continue reading...Radioactive Contamination
16. May 2008
Removal of Surface Radiation from Steel- Dry Blasting compared to Ultra-High Pressure Water UHP WJ is routinely used to remove surface radiation from steel in nuclear plants. John S. Oechsle Jr., who is now retired, worked with S.G. Pinney & Assoc. in Florida and prior to that in the 1950’s worked with Metalweld and [...]
Continue reading...Calculating Erosion
16. May 2008
Calculation of Erosion in terms of energy per square area per minute per hydraulic horsepower. One of the major UHP pump manufacturers has studied this erosion and energy concentration at length as they sell both cleaning and cutting equipment. A typical surface cleaning application is 0.8 liters/minute (3 gallons per minute) at 280 MPa (40,000 [...]
Continue reading...Cleaning Sewer Pipe
16. May 2008
D. Wright, J. Wolgamott, G. Zink, WJTA American Waterjet Conference, Houston, paper 2B-1, (2005); D. Wright, J. Wolgamott, G. Zink, 2005 WJTA American Waterjet Conference, Houston, paper 2B-2, (2005) No surprises here, I’m thinking. This erosion of material (if the nozzle is at rest) is also true for interior pipe cleaning. Zink and Wolgamott of [...]
Continue reading...Substrate Change
16. May 2008
1999 Thiokol Paper on Erosion of Steel Substrate Exposed to Ultra-High Pressure Waterjet The 1999 WJTA paper by Swenson and Miller of Thiokol “EROSION OF STEEL SUBSTRATES WHEN EXPOSED TO ULTRAPRESSURE WATERJET CLEANING SYSTEMS “ is a good summary of the substrate change. My thoughts on this: The first pass of a UHP [...]
Continue reading...Metal Removal
16. May 2008
In Mid-May, 2008, I got two separate inquiries about “how much metal will UHP WJ remove compared to dry Blasting? In each case, the owner was looking at corroded areas and didn’t have a protocol or specification for UHP WJ for corrosion removal. The question of material removal of metals has been studied for several [...]
Continue reading...Case Histories
16. May 2008
I will be posting case histories in this category from time to time. I hope you will add your commentary to these vignettes in order to promote continuous improvement initiatives.
Continue reading...Cleaning
15. May 2008
The more I talk with people the more I realized that cleaning and surface preparation are really two different discussions. Certainly the two overlap, but the object of surface preparation, while usually involving cleaning, has a realm of terminology and aims that are very specific to future action to be taken, while cleaning is an [...]
Continue reading...Newsletters
13. May 2008
Posts in the Newsletter are sent to subscribers. Registered users of Flotsam and Jetsam can select which posts they choose to receive by editing their profile. If you want to subscribed to the Newsletter specifically, look under Newsletter on the right and register. If you are logged in and wish to unsubscribe, go to the same place.
Continue reading...- stuart: I am not going to be original this time, so all I...
- generic drugs pharmacy: Very interesting and amusing subject. I read with...
- cheap generic drugs: Thank you! You often write very interesting articl...
- Internet Banking: Just killing some time on Digg and I found you...
- estiseami: FANTASTIC!...
Asides 
Got back from MegaRust in June. Immediately involved in flash rust -ISO- paint for companies in UK and France involved in Maritime (IMO)
@michal63 Paint is the first line of defense against corrosion problems. It is cost savings- but part of maintenance.
Just finished yesterday a major re-write of Waterjet surface preparation document- once again. NOw for something more fun.
Latest Flickr photos
© 2009 Flotsam and Jetsam. Powered by Wordpress.
16. May 2008
0 Comments