Water blasting

Power Washing. Power washing is similar to steam cleaning, except that the cleaner is injected into a high pressure (6.9—35 MPa (1000—5000 psi)) water blast in power washing. The water can be cold, warm, or hot, because the power washer is fed from a water tap. 

After almost 20 years of service, many leaks developed throughout the mill water supply system. Upon inspection, it was found that perforations had occurred beneath large tubercles. Some tubercles were up to 6 in. (15 cm) in diameter. Accessible pipe was water blasted to remove tubercles, and the deepest metal-loss areas (several thousand) were weld repaired. Perforations ceased. 

Wasser-gang, m. aqueduct drain waterway. -gas, n. water gas, -gasteer, m. water-gas tar, -geblkse, n, water blast, -gefass, n. water vessel (Med.) lymphatic vessel, -gehalt, m, water content, moisture content. 

Cleaning with hand tools Cleaning with power tools Cleaning by sand blasting Cleaning by water blasting and... 

Water blasting will remove substances such as loose and blistered paints, loose rust, grease and other accumulated residue. Although water blasting will not produce a surface equivalent to that produced by sand blasting, it is nevertheless an economical method of cleaning for lining application. 

Uses Corrosion/rust inhibitor in water-based protective coatings inhibits flash rust and In-can rusting stabilizes metal substrates for water blasting... 

High-pressure water blast has been used for prebond surface treatments to eliminate hazardous materials. The combination of high-pressure water abrasion with subsequent application of an adhesive promoter/primer has been found to provide high strength and durable aluminum bonds. 

Materials by Water Blasting Prior to Coating or Recoating—Item 53008-P... 

Cleaning procedures for refinery/petrochemical equipment will continue to emphasize less toxic chemicals, high-pressure water blasting (with water recovery), and considerations for the disposal of the waste materials. Continued use of analytical methods (such as FTIR) may reduce the time necessary to develop an appropriate cleaning sequence. 

Water Blasting Blast cleaning of metal using liigh-velocity water. 

High-pressure pumps Used in many applications including water blast, hydromining, and jet cutting. They can be a wide variety of pump types including positive displacement pumps, rotary pumps, and reciprocating pumps or centrifugal pumps. 

In order to remove NORM, the current standard practice is to water blast, but this generates a considerable waste stream in itself, which is costly to store, and for which, in many regions, no appropriate final disposal option exists. An alternative is to use dry blasting which turns the issue of storing cubic meters of waste to liters of waste. 

The sand test results indicate a brisance of 112 percent of TNT. The detonation velocity is 6,630 meters per second for a density of 1.65 grams per cubic centimeter and 6,800 meters per second at a density of 1.76 grams per cubic centimeter. By the ballistic mortar test the power of PBX is 146 percent of TNT. For the 100°C vacuum stability test, 0.6 cubic centimeters of gas are evolved in 40 hours. The energy of the air blast is 138 percent of TNT and the energy of the water blast is 143 percent of TNT. 

Where the second-stage concrete is placed after the first stage has hardened, sand or water blasting is required to remove laitance and to produce a clean, sound surface. 

Mechanical-based paint removal methods involve machineiy and/or manual labor. Two acceptable methods on exterior surfaces are contained water blasting (Hydrosander, 1990) and abrasive blasting with a vacuum arrangement (LTC, 1990 Vacublast, 1990 Zero, 1985). Table 11.3 lists examples ofvacuum abrasive media-cleaning units. Water blasting requires a containment system, which is very difficult to maintain. In addition, clean-up costs are significant, and water damage to interior structures is a possibility. 

The application of a CFRP lining system to a pipeline is a bond critical application, so the surface of the pipeline must be prepared sufficiently to ensure proper adhesion. Concrete surfaces are profiled using abrasive or water blasting to a minimum International Concrete Repair Institute (ICRI) concrete surface preparation CSP 3, as shown in Figure 1.3, whereas a metallic surface will be prepared using abrasive blasting to a near white metal surface profile. Surface contaminants (laitance, carbonated and weak concrete, cracked and spalled concrete) are removed and the substrate is repaired as necessary. The work requires the pipe surface to be thoroughly cleaned, dried, and dehumidified. 

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