(openPR) - The standardisation of inert welding gases is uniform throughout the world under the international DIN EN ISO 14175 standard. Previously, inert welding gases were standardised under the European DIN EN 439 standard. Messer, the gases specialist, provides comparison tables on the Internet at www.messergroup.com showing at a glance the allocation of products from the Messer range of inert welding gases and providing comprehensive information about the new designations. The new standardisation is of particular interest to companies with international operations who work in areas requiring licenses.

In addition to the classification of gases and gas mixtures into main groups, changes have also been made to the mix accuracy, the permissible moisture content and the names of the main groups. In the main groups, the changes only affect the forming gases and special gases. The groups have been renamed “N” and “Z”. The group Oxygen “O” has also been added. The maximum permitted moisture content of the gas groups “O” and “C” has been altered as the purities used in practice have far exceeded the standard for a number of years. With regard to the mix accuracy, no definition has been made for additions of less than one per cent. Nothing has changed as far as additions of more than one per cent are concerned.

Messer is one of the leading industrial gas companies, and is active in over 30 countries in Europe and Asia, as well as Peru, with over 60 operating companies. Its international activities are managed from Frankfurt am Main, whilst management of core technical functions – logistics, engineering, production and applications engineering – is undertaken from Krefeld. In 2007, about 4,400 employees generated consolidated sales of €705 million.
From acetylene to xenon, the Messer Group has one of the most diverse product portfolios on the market – it produces industrial gases such as oxygen, nitrogen, argon, carbon dioxide, hydrogen, helium, shielding gases for welding, specialty gases, medical gases and many different gas mixtures.
The Messer Group has state-of-the-art research and competence centers in which it develops applied technologies for the use of gases in almost every sector of industry, in food technology and environmental technology, medicine as well as research and science.

Messer Group GmbH
Vice President
Corporate Communications
Diana Buss
Gahlingspfad 31
47803 Krefeld

Phone: +49 (0) 2151 7811-251
Fax: +49 (0) 2151 7811-598
Email: diana.buss@messergroup.com
www.messergroup.com