STRAUBENHARDT – High safety standards are valid for the employee’s health protection during welding and similar applications such as processing various materials with a laser. These let arise chromium IV particles, which are demonstrably carcinogenic. The lawmaker has set strict guidelines on how to eliminate these pollutants safely and effectively from the air. As a manufacturer of filter and extraction systems, TBH GmbH currently offers one of the worldwide largest range of DGUV approved mobile welding fume systems in accordance with valid guidelines DIN EN ISO 15012-1 and DIN EN ISO 15012-4.
In accordance with the German Occupational Safety and Health Act, the percentage part of dangerous fumes and gases in the air cannot exceed defined limit values. These depend on the harmfulness of each contaminant. Gaseous and particulate hazardous substances within welding fume are respirable. Inhaled chromium expositions are so small that they can penetrate the alveoli and settle there.
To assure a safe and effective filtration of these very harmful hazardous substances from the ambient air, the lawmaker and the Employer’s Liability Insurance Association demand using filter and extraction systems for thermal processes. In accordance with TRGS 528, only extraction systems, which carry the seal „approved against hazardous substances according to welding fume efficiency class W3”, are allowed to use for these processes. If not all operating systems carry this seal, an inspection will cause the shutdown of the production line.
TBH filter and extraction systems with the “DGUV test seal” meet the required protection level in accordance with TRGS 528. In reference to that, the TRGS 560 regulate the requirements concerning air return when operating with carcinogenic contaminants. The thermal processing of nonmetal material releases harmful particles in nanoscale as well.