|Document ID (ISN)||107962|
|ISSN - Serial title
||0007-9952 - Cahiers de notes documentaires - Hygiène et sécurité du travail
|Convention or series no.
||INRS ND 2273-208-07
||Haguenauer D., Marchal P., Jacques M.
||Validation of test methods for switchable welding filters
||Validation des méthodes d'évaluation des filtres de soudage commutables [in French]|
||3rd Quarter 2007, No.208, p.19-33. Illus. 6 ref.
||Manufacturers of welding protective equipment supply face shields with variable light transmission. At rest, they are clear but they darken as soon as the welding arc is activated, so as to ensure eye protection against the optical radiation emitted by the arc. The aim of this study was to check whether the test methods recommended by the EN 379 standard take into account the specific characteristics of this type of filter. Checks were carried out under the conditions specified by EN 379 as well as beyond, clearly showing that when the angle of incidence of the radiation reaches or exceeds 30° from the perpendicular to the screen, the efficiency of these filters drops significantly. The standard recommends taking transmission measurements up to 15°; however, a welder is likely to work at an estimated maximum angle of 30°, a value which will be proposed when the standard is revised.
||polarized light; angle of vision; equipment testing; face shields; arc welding and cutting
||standardization; description of equipment
||D - Periodical articles
|Country / State or Province||France|
||Metal production and metalworking
|Broad subject area(s)
||Face and eye protection
Welding and cutting