Removal Method On Multi Material Body Repair Station

Betafoam Open-Celled Acoustic - Foam

This foam is not fire retardant or self-extinguishing. When oxygen is available for the foam, fire can result due to sparks or other ignition sources.

Fine Aluminum Dust

Fine aluminum dust is combustible and/or explosive. Technical equipment must be handled so that no external ignition sources can pass into the filter or the dust collection container. The stationary "genuine" aluminum vacuum stations used through 2009 (Dansk Klimablock / Aeroweld or Nederman) do not offer the technical equipment protection and also cannot be retrofitted. All these suction devices and the aluminum vacuum devices available on the market are without exception "ignition source free". For this reason vehicles with steel parts and on which flying sparks from the steel components cannot be completely prevented must NOT be worked on in this area.

The Ruwac NA35 Wet Collection for Explosive Materials VAS6572/1 (dust class M) from 2009 and the VAS6572/2 (dust class H) have a 3-part protection against the intake of friction sparks from the possible steel processing. This protection is made of a 5 m long antistatic suction hose, the so-called spark trap and a 5 m long flow calming section. This ensures that also by unintentional sanding of steel components the glowing sparks are cooled well below the ignition temperature of the aluminum dust. The system has the German Technical Inspection Agency certificate for considerably hotter and longer glowing steel sparks.

A second risk is the static charging of metal particles due to friction in the hoses and pipes during the suction process. This static charge can function as an ignition source in the same way as a glowing spark. To make sure that only the antistatic so called "Ohm hoses" can be installed, the suction system connection coupling and the hoses on the suction side have an error safe Storz-C coupling.

The third risk is the suction device's possible impact as an ignition source on the surrounding area. Because this suction device is based on industrial vacuum cleaners it automatically has all constructive features for the use in zone 22 and to prevent a possible impact as an ignition source in the working environment. For accident repairs the work procedures such as cutting, grinding and welding automatically produce more ignition sources than a suction device can.

Fine Steel Dust

Steel sparks and dust are considered to be risk free. In multi material mixed work stations the steel flying sparks present the greatest risk potential for the fine aluminum dust! For this reason and in compliance with the process separation, a steel vacuum must always be provided which is also allocated to always remain at the body work station. Generally only aluminum vacuums are used because they have a tested spark trap, that could be equal to the explosion protection device heat test, while the vacuum sits next to the worker in the work area during this procedure. The Ruwac NA35 Wet Collection for Explosive Materials VAS6571/1 is based on the same basic machine as the VAS6572/2, but without a 3-part spark trap. It is suitable for use in zone 22. The filter is dust class "M" like those suitable for the metal dust.