Water Blaster

TACJET PTE LTD
Email: tacjetsingapore@gmail.com

Tac Industrial Supply
Email: tacindustrial@gmail.com

190 Woodlands Industrial Park E5
Woodlands Bizhub #09-06
Singapore 757516 
Tel: +65 65703241 
Fax: +65 65703243

TacJet TacJet TacJet

Water Blaster

CE40 Series

Tacjet introduces CE40 Series to market. For more information and you can download catalog, please click on pdf icon.

CE40 Series

CD25 Series OPEN FRAME

Tacjet introduces CD25 Series OPEN FRAME to market. For more information and you can download catalog, please click on pdf icon.

CD25 Series OPEN FRAME

CD50 Series OPEN FRAME

 

 

Tacjet introduces CD50 Series OPEN FRAME to market. For more information and you can download catalog, please click on pdf icon.

CD50 Series OPEN FRAME

CE20 Series

Tacjet introduces CE20 Series to market. For more information and you can download catalog, please click on pdf icon.

CE20 Series
Application
Industries

 Applications

 Recommended
 Pressure (bar)

 Aluminium plant  Hardened bauxite dust on mills, filters, floors, tanks, sumps and sewers.

 350 - 2800

 Aviation  Expansion joints, grease, rubber and hydraulic fluids on runways.

 690 - 1400

 Breweries  Yeast, sediments and fermentation residues on vats, pipe and facilities.

 200 - 2800

 Cement plant  Remove dirt, grease and product build up on grates, floor, external piping, bins, walls, hopper cars and handling equipment.

200 - 690

 Chemical 
 processing
 Chemicals from boiler tubes, tanks, valves. evaporators, heat exchangers, tube bundles, vessels, reactors and storage tanks.

 350 - 2800

 Construction  Concrete demolishing, exposing steel-bars, cutting concrete and steel bars.

 350 - 2800

 Distilleries  Cleaning of heat exchanger, boiler tubes, vats and pipe lines.

 600 - 2800

 Food processing  Grease, fats, oil and dough from ovens, mixers, conveyors and facilities.

 200 - 1000

 Foundries  Removal of deposits, metal oxidation, ceramic & sand core materials for casting.

1000 - 2800

 Highway 
 Maintenance
 Cleaning of grease, vegetation, mud tar, cement or asphalt on vehicles & machinery. Removal of expansion joints, paint strips and concrete demolishing on road bridges.

 350 - 2800

 Marine & Offshore  Removal of marine growth, barnacles, paint and rust on ships, deck, hull and ballast tanks. Oil platforms: storage tanks, boilers, cold cutting, underwater blasting, pipe cleaning, paint and rust.  

 500 - 2800

 Meat packing  Cleaning of grease, fats, blood on conveyors, pipes and drains.

 200 - 690

 Metal processing  Mill scale, rust and weld slag from new vessels, tanks and pipe. 

 1400 - 2800

 Military  Cut & explode mines, decontamination of shells and cutting cordite. Cleaning of machinery & vehicles

 200 - 2800

 Mining  Pre-maintenance cleaning of dump trucks, drag-lines, underground haulage lines and shafts.
 Unclog plant machinery due to coal, rock dust and oil.

 300 - 2800

 Municipalities  Sewers, drains, pipe lines, sanitation, refuse vechicles and reservoirs.

200 - 500

 Oilfield Remove crude oil residues from oil tanks, removal of drilling mud and cement from drill-pipes, remove paint coating and rust on pipes, ladder tanks and walkways.  

 600 - 2800

 Petrochemical Removal of carbon, residues in heat exchangers, soft polymers, boilers, tanks, reactors, cooling towers and general water blasting. Cold cutting and surface preparation. 

 350 - 2800

 Pharmaceutical Cleaning of chemicals from pipes, kettles, tubes, heat exchangers, reactors, filters and evaporators.

 600 - 2800

 Pipe industry Removal of rust and varnish prior to re-coating, grease and oil from pipe threads for inspection, drilling mud and debris in various pipes. 

 600 - 2800

 Power stations Nuclear decontamination of fuel capsules, skips, cold cutting, flash from pre-heater tubes and equipment. Clean debris and contamination from pool. 

 690 - 2800

 Public utilities Reactors and insulators, boiler tubes, vechicles and machinery. 

 350 - 1400

 Mills Cleaning grease, oil, pitch dirt and wood pulp from heat exchanger tubes, foundries, liquor press sections of paper machines, suction rools, stock chests and lines.  

 350 - 2800

 Railroad Gypsum, potash, cement line cars, remove grease, dirt and deposits in truck, undercarriage and tank cars Removal of oil and materials from tanks, remove paint, rust and cement.  

 350 - 2800

 Refineries Wax, paraffin, grease and crude residues, water scale, coke, hard carbons and polymers in heat exchangers, pipes, tubes and tanks. Remove paint coating and rust.

 600 - 2800

 Rubber process Latex, SBR and water scale in reactors, storage tanks, heat exchangers, tubing and pipes.  

 600 - 2800

 Steel mills Water scale, coke, ore or lime in heat exchangers, flues, boilers and open hearths, furnaces and hoppers. 

 600 - 2800

 Surface
 preparation
Remove paint, rust, refractory build-up, salts, concrete and marine growth. 

 500 - 2800

Hydroblasting


Water as blasting media.

Hydroblasting, water jetting or water blasting are terms commonly used when describing water as the tool to do surface preparation. The use of water is a technique for cleaning surfaces, which relies solely on the energy and force of water striking a surface to acheive its cleaning effect. In principel abrasive is not used in hydroblasting systems, hence, the problems caused by dust pollution and by the disposal of spent abrasives are eliminated. However wet-sand blasting is often used in conjuction with 500 to 700 bar water blasters to enhance the productivity and surface finish.  

Surface Condition after Hydroblasting.


Flash rust:

When large areas are hydroblasted, flash rusting which deminish the original surface standard may occur, before painting can be carried out. The degree of flash rusting depends on many factors, such as humidity level, temperature and the length of time the surface is exposed.

Degrees of flash rust:

- Light flash rust     : small quantities of light tan-brown rust will partially discolour the original steel surface. The discolouration may be evenly distributed, or in patches, but it will not be heavy enough to mark an object brushed against the areas.

- Medium flash rust : a layer of light tan-brown rust will cover the original steel surface. This layer may be evenly distributed or in patches, but it will be heavy enough to easily mark objects brushed against the areas.

- Heavy flash rust   : a heavy layer of dark tan-brown rust will be completely covering the original surface. This layer will be evenly distributed and will easily mark objects brushed against the areas.  

Is the flash rust too heavy for coating application, it should be removed by washing down with high pressure fresh water, ideally with a fan jet nozzle using the same equipment as used for hydroblasting at lower pressure. It will cause the surface to re-rust, but it is possible to reduce the degree of flash rusting from heavy to light.

All paint manufacturer have "modified epoxy" paint that can be applied directly on areas with light rust without compromising the lifespand of the coating.


Temperature rise:

The use of hydroblasting will cause the temperature of the steel to rise. The increase of temperature of the steel surface can be substantial, depending on the pressure of the equipment used and will help hydroblasted surfaces to dry off faster, hence reducing the degree of flash rusting.


Removal of foreign elements :

The use of water has the advantage of removing oil and grease from the surface along with salt deposits. This is a major plus point of hydroblasting. The grey, brown to black discoloration of corroded and pitted steel after hydroblasting cannot be removed by further blasting. Studies shows that this thin film consists of mainly ferric oxide, which is an inert material. As it is tightly adherent, it does not present a serious contamination problem.

Surface Profile.

Hydroblasting will not produce a surface profile as such. Weakend steel might erode, resulting in metal loss, but the surface profile exposed after blasting will have been produced by earlier surface preparation or corrosion.

Surface Standards

Surface Preparation Standards.  

Surface preparation standards are stipulated by various bodies throughout the world to designate the cleanliness condition of blasted steel, prior to applying a protective coating.

The applicable cleanliness standard is usually called for by either the protective coating manufacturer or the owner of the structure to be painted.

The most commonly referred to standards are SSPC, NACE, Swedish Standards and ISO.

Each standard is divided into four standards of cleanliness, broadly described as follows; brush off, commercial, near white metal, white metal. Whilst each standard may differ slightly in requirements and terminology the following cross reference chart indicates the close approximation of each level of cleanliness for each standard.

                       BRUSH OFF         COMMERCIAL           NEAR WHITE METAL            WHITE METAL

SSPC              SP 7 - WJ 4          SP 6 - WJ 3                SP 10 - WJ 2                     SP 5 - WJ 1 

NACE                  No.4                     No.3                           No.2                                No.1

SWEDISH            Sa.1                     Sa.2                           Sa.2.5                             Sa.3

ISO 8501             WA.1                    WA.2                          WA.2.5

International        HB.1                     HB.2                           HB.2.5


A brief description of each of the four levels of cleanliness is as follows:

Brush Off - Loose mill scale, loose rust and foreign particles are removed.

Commercial - Mill scale, rust and foreign particles are substantially removed and grey metal is visible.

Near White Metal - Mill scale, rust and foreign particles are removed to the extent that only traces remain in the form of spots or stripes. The cleaned surface will show varying shades of grey.

White Metal - Visible mill scale, rust and foreign particles are entirely removed. The cleaned surface should have a uniform metallic colour but may show varying shades of grey when viewed at different angles.


The full standards are available from each organisation from the following links:

National Association of Corrosion Engineers     http://www.nace.org/

Steel Structures Painting Council                    http://www.sspc.org/

International Organization for Standarization   http://www.iso.ch/

Swedish Institute for Standards                      http://www.sis.se/


The appearance of steel after blasting will vary greatly and is subject to, amongst other things, the condition and appearance of the steel prior to blasting. Other factors that influence the post blasting appearance include, angle of blast and profile height.