PRACTICAL /ˈpræk.tɪ.kəl/

2. effective or suitable to a situation,
3. able to be done or put into action,
4. able to provide effective solutions to problems,
5. directed toward the goal of intended work.

1. relating to actual experience or use of knowledge in activities,

Part 2: Practical Considerations

Successful removal of microscopic contaminants is key, but removal of macroscopic contaminants (oil, dirt, visible rust, etc.) is equally important. Integrating OxNot and vapor blasting into one seamless process creates a new approach to reliable, practical surface preparation that improves control of process variables and project efficiency. 

 

VARIABLE 1: COLLATERAL CONTAMINATION

 

Vapor blasting achieves similar or better results than dry abrasive blasting and hydroblasting without the collateral contamination. Using one-third the water of hydroblasting and up to 90% less grit media than dry abrasive blasting, the process operates using low hydraulic pressure means that grit particles cushioned by vapor won’t embed grit particles into substrates or force water into pores. The vapor droplets encapsulate the grit, adding mass to the particles so they are pulled by gravity to the workspace floor, rather than dispersing to nearby areas. Adding OxNot CleanBlast to the water supply tank in vapor blast equipment allows simultaneous decontamination while vapor blasting to prevent rustback.

VARIABLE 2: AMBIENT CONDITIONS

Dry abrasive blasting cannot be performed in high humidity or precipitation, as equipment easily becomes clogged and inoperable and performance at the nozzle is affected as well. Vapor blasting is less affected by ambient conditions, working in conditions of high temperature, high humidity and precipitation. OxNot CleanBlast is a humidity-loving treatment that works in a similarly wide range of temperatures. However, if rain occurs after application of OxNot CleanBlast, a second rinse is required to remove any rain-deposited contaminants for full efficacy. Liquid-based methods such as vapor blasting and hydroblasting are not suitable for use in freezing temperatures.

VARIABLE 3: WORK SPACE

Large equipment that requires bulky PPE, extensive shrouding, and auxiliary equipment are unwieldy in tight, complex configurations. Self-contained, compact vapor blasting equipment is a better fit in such circumstances because it requires less extensive PPE and shrouding while eliminating the need for large hoppers, dehumidifiers and huge water tanks in the work area.

Advanced vapor blasting equipment is pre-charged from the air compressor before entering the workspace and water vapor encapsulates the grit media, static/spark risks are considerably reduced, a boon for work in exposed spaces and areas with spark risks. Many models of vapor blast equipment is also designed for easy transport on flatbed trailers or the bed of a standard pickup truck and can be maneuvered into position using a standard forklift.

Process wastes in vapor blasting are easier to contain (low dispersion) and reduced in volume because vapor blasting uses only a small fraction of the grit media and water volume used by dry abrasive and hydrojetting equipment. Water and grit media storage, transportation and waste collection logistics are drastically reduced to manageable levels, even in ecologically fragile and remote locations, and using environmentally safe OxNot CleanBlast won't add to the toxic load of process byproducts.

VARIABLE 4: COMPATIBILITY

Heat affected zones (HAZ) created during welding and precision parts with tight engineering tolerances are both susceptible to damage caused by heat and high velocity impact. Heat (created during the high-friction process of dry abrasive blasting) and high velocity (caused by processes employing high pressure such as dry abrasive blasting and hydrojetting) can reduce weaken, warp and reduce substrate thicknesses in these vulnerable areas. heat-causing friction.

 

Vapor blast equipment relies on low-pressure in combination with water vapor to create the same force of impact on cleaning, but without the risk of heat or high velocity. Water cushioned grit media can be dialed in to remove an individual layer of coating or multiple layers of coating at one time.

 

Advanced vapor blast equipment is compatible with vapor blasting grit media as diverse as organic, plastic, glass, engineered and steel media (virtually any media that sinks in water) to clean and decontaminate an extremely wide range of metal surfaces (from hard metals like steel to soft metals like aluminum), without risk of damage to HAZ and metal components with a narrow range of engineering tolerance. Similarly, OxNot CleanBlast is designed to work during vapor blast using any grit media, and is fully compatible with any coating system.

VARIABLE 5: TIME

 

Cutting the cumulative time it takes to achieve a satisfactory end result is the definition of process efficiency. The cumulative duration of a surface preparation project encompasses setup of blast or cleaning equipment, auxilliary equipment, environmental controls setup, labor/cleaning tasks, troubleshooting, inspections and cleanup. The degree of process efficiency directly impacts contractor profits per job and owner profits, since out-of-service assets do not generate ROI.

 

Using OxNot CleanBlast in a vapor blast system cuts the average asset maintenance (surface preparation and coating project) completion time in half by reducing the frequency of interruptions (setup, cleanup and inspections) and scope of equipment and controls required..

 

When rain events occur, even more time is saved by eliminating the need for re-blasting because OxNot CleanBlast retards flash rust during blasting, with no dwell time required. If the process is interrupted by a rain event, a brief rinse to remove potential contaminants deposited by the rain (such as chlorides, dust or acid rain) is all that is needed to refresh OxNot CleanBlast treated metal to coating-ready condition.