What is water jetting?
Water jetting consists of the use of a stream of pressurised water for several applications in various sectors. With the appropriate combination of pressure and flow of the different pumps, and the use of the appropriate accessories is how, this great versatility of applications is achieved.
The systems required consist of an energy source like an electric motor or internal combustion engine, a pump, control mechanism, hoses, pipes, nozzles and various other components necessary for the equipment to function as a system.
The most commons applications are found in:
- Construction: maintenance, repairs, hydrodemolition, etc.
- Surface preparation and coating removal
- Industrial cleaning and maintenance
- Municipal cleaning
- Cold Cutting
It should be noted that sometimes, water jetting applications can be an intermediate activity, which require previous actions that give rise to others later, thus increasing the degree of difficulty in applying these techniques.
This difficulty also responds to use of tools that involve very diverse and specific applications and risks, requiring the use of special equipment, workers with specific training, and an efficient technical and safety coordination.
It is considered that high pressure in water jetting applications begins with a working pressure of about 200-250 bar. The exact pressure within this range, that will determinate the beginning of high pressure varies from country to country, depending on their different regulations. In this regard, each company must be fully aware of the regulations of the country where it operates.
As an example of this situation, below you will find the values from which it is considered high pressure in water jetting in some UE countries:
- In France, is considered to begin with a working pressure higher than 25 bar, according to the standard EN 60335.
- In the Netherlands, according to SIR (Stichting Industriële Reiniging), high pressure means having a working pressure higher than 250 bar or a working pressure higher than 25 bar with a pump power over 10kW.
- In the UK high pressure is considered to begin with a working pressure of around 70 bar.
- In Spain, according to ALTAP (Asociación de Limpieza Técnica y Agua a Presión), high pressure begins with a working pressure of 140 bar.
- In Germany, according to the DGÜV guidelines, high pressure begins with a working pressure of 25 bar.
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