Befesa - Presse

News

07.27.2005

S.A.I.C.A. has contracted Befesa for cutting and dismantling works with ultra-high pressurized water (Hydrocutting)

Befesa Tratamientos y Limpiezas Industriales is employing Hydrocutting technology, with very satisfactory results, to dismantle digester tanks. More than 200 meters have now been cut very successfully, considering they are highly explosive and the impossibility of any other technique being utilized.

Hydrocutting consists of utilizing an extremely high pressure water injection system while adding an abrasive element (sand), which is sucked by Venturi effect and used to cut different items such as tanks, beams, reinforced structures, etc. which, due to their state or to them being a potential danger upon them being located in places with highly explosive atmospheres, cannot be cut using conventional hot cutting methods (flame or mechanical cutting).

A minimum of 2,000 bar pressure has to be used for hydrocutting.

The cutting equipment is connected to the elements that are to be cut. This connection is magnetic in the case of metallic structures, and mechanical anchorage in the case of other materials, while the cutting nozzle, which slides in a straight line on the surface, is held by a pneumatic guide. The assault direction and angle on the surface to be cut can be changed.

The cutting equipment operators are always, at least, six meters from the cutting point which means that the degree of safety in the execution of the works is very high.

Hydrocutting allows the execution of dismantling works in explosive atmospheres, on structures located at a certain height, or in situations where stationary structures or scaffolding cannot be installed.

The development of this technique does not involve the use of heat sources and, therefore, the deforming of delicate structures is avoided while the risk of fire and the emission of toxic gasses that might affect both the health of the workers and the environment are also eliminated. As a consequence, the system can be employed in confined spaces and classified areas as there are no gas emissions or sparks.

A remotely controlled automated and robotized system is employed which means that there is a very high degree of protection in terms of worker safety.