| Document ID (ISN) | 55214 |
| CIS number |
91-196 |
| ISSN - Serial title |
Occupational Health Journal |
| Year |
1988 |
| Convention or series no. |
|
| Author(s) |
Yagami T. |
| Title |
Estimate of the efficiency of respirators used against fumes and gas in welding and application of magnetopneumography |
| Original title |
Yōsetsu hyūmu, gasu ni taisuru kokyū-hogogu no seinō-hyōka to haijikai-sokutei no ōyō ni tsuite [in Japanese] |
| Bibliographic information |
July 1988, Vol.11, No.4, p.12-21. Illus. 5 ref. |
| Abstract |
The protective performance of respirators depends upon the collection efficiency of filters, air flow resistance and facial fit. Collection efficiency was estimated by measuring the amount of perifacial leakage of respirable dust, ozone and nitrogen dioxide. The Roken Mask-Tester that was used is a mobile apparatus, freely usable by workers anywhere in the workplace. The fit between face and respirator was evaluated by measuring the rate of dust leakage into the respirator using a high-sensitivity aerosol meter. Retained dust in the welder's lung was measured by magnetopneumography using a computer control system. The latter is a non-invasive, non-destructive technique for estimating the amount and mapping the location of inhaled magnetisable dust in the lung. The present study was performed in a welding test chamber and in welding shops. A strong magnetic field was measured in the lungs of arc welders, especially in those with poorly fitting respiratory protection (collection efficiency of 86% or less). The new type of fibrous active carbon filter provides reliable protection against ozone. |
| Descriptors (primary) |
arc welding and cutting; welding and cutting; leakage testing; respirators |
| Descriptors (secondary) |
gas removing respirators; description of equipment; magnetopneumography; description of technique; particulate removing respirators |
| Document type |
D - Periodical articles |
| Country / State or Province | Japan |
| Subject(s) |
Personal protection
|
| Broad subject area(s) |
Chemical safety
|
| Browse category(ies) |
Respiratory protection
Welding and cutting
|
