Cleaning work - 111 entries found
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Clemmensen O.J., Meuné T., Kaaber K., Solgaard P.
Exposure of nickel and the relevance of nickel sensitivity among hospital cleaners
Review of reports on nickel sensitivity and nickel hand eczema in hospital cleaning workers and report of studies on cleaning water in 5 hospital in-patient units to determine whether this water contained the nickel sensitising agent. Analysis of the fresh water and of the water after various hospital appliances and installations had been washed. Statistically significant increases of the nickel concentrations were found at each step of the cleaning, eventually exceeding the theoretical sensitising safety limit. It is thought that a significant amount of this nickel is released during the cleaning of stainless steel appliances and installations. Nickel penetrates rubber gloves and therefore the wearing of vinyl gloves is recommended.
Contact Dermatitis, Jan. 1981, Vol.7, No.1, p.14-18. 15 ref.
Carlsson L., Wibom R.
Lighting of workplaces in foundries and the iron and steel industry - Maintenance of luminaires, results of a long-term study
Arbetsbelysning i gjuterier och smältverk - belysningsunderhåll, redovisning av resultat från långtidsprov [in Swedish]
Studies over more than a year of 8 types of luminaires installed at 43 foundries, and a questionnaire survey of maintenance practices, are reported. Considerable differences were noted in the degree of soiling due to deposited smoke and dust, depending on luminaire design. The least soiled were those with ventilation. Open reflectors are not suitable for foundries as they are get dirty too quickly. The light output of lamps in closed luminaires fell more quickly than that of those in open ones. Thorough cleaning of luminaires once a year considerably improves lighting conditions.
Ljuskultur, 1979, Vol.51, No.2, p.11-27. Illus.
Hazard control of liquid oxygen systems.
The many opportunities for unsafe conditions in liquid oxygen storage and equipment cleaning are noted and methods for avoiding the conditions are described. Hazards include low temperatures, detonation and fire, pressure when liquids become gases, reactions of oxygen, brittle fracture of metals, whipping of pipes due to release of gas, presence of impurities. Materials for cleaning must be carefully chosen since very small amounts of foreign substances are dangerous. Problems occurring during cleaning are mentioned (vacuum pumps without adequate traps; presence of organic material, phosphates or silicates; use of makeshift wood plugs). Permissible metals (stainless steel or copper, aluminium and nickel alloys) and non-metals (fluorinated polymers, silicone rubbers) and their use in containers, pipes and fittings, gaskets, valves, pumps, gauges, venting systems, and cleaning techniques are described.
Professional Safety, Jan. 1979, Vol.24, No.1, p.21-25. 8 ref.
Methods and equipment for cleaning belt conveyors
Massnahmen und Einrichtungen zur Säuberung von Gurtbandförderern [in German]
Many serious accidents found in all statistics are due to cleaning conveyor belts while still in motion. In principle, steps should be taken to prevent clogging or fouling requiring too frequent cleaning, already at the design stage, or by additional equipment (e.g. scrapers). Description of methods and devices for cleaning the belt (various types of scraper, washing systems, anti-fouling materials), drums (scrapers, supplementary rollers, self-cleaning surfaces, heating) and supporting rollers. Another solution proposed is that of turning over the belt.
Die Industrie der Steine und Erden, Sep.-Oct. 1978, No.5, p.150-157. Illus. 5 ref.
Use of petrol as a solvent or detergent
Moottoribensiinin käyttö liuotin- ja puhdistusaineena [in Finnish]
Användning av motorbensin som lösnings- och rengöringsmedel [in Swedish]
This circular, addressed to all agencies of the Finnish Labour Inspectorate, draws attention to the hazards involved in using petroleum motor spirit as a solvent or cleaning agents. Petrol contains benzene (4-7%) which is haematotoxic and leukaemogenic, and neurotoxic organic lead compounds (0.1-0.7Pb/L). These substances may be inhaled or absorbed cutaneously. The circular requests the agencies concerned to prohibit the use of petrol for the above purposes, replacing it by less harmful solvents. CIS has only the Swedish-language version.
Kiertokirje 7/76, Directorate of Labour Protection (Työsuojeluhallitus), Hämeenkatu 13b, 33101 Tampere, Finland, 11 May 1976. 1p.
Cleaning small containers that have held combustibles.
This data sheet covers small containers such as drums, cans, fuel tanks of cars and trucks and tanks for domestic storage that cannot be entered for cleaning purposes. It lists the precautions which should be taken to ascertain the nature of the contents, the personal protective equipment that should be worn and the general safety measures to be followed when cleaning empty containers with water or steam. The container should be inspected and tested if necessary to ascertain that it is clean.
Data Sheet 432, Revision A, National Safety Council, 425 North Michigan Avenue, Chicago, Illinois 60611, USA, 1975. 2p. 4 ref. Price: US-$0.50.
Mason E.W., McKinlay A.F., Clark I., Saunders D.
Thermoluminscence sensitivity variations in LiF:PTFE dosemeters incurred by improper handling procedures.
Thermoluminescent dosimeters consisting of lithium fluoride (LiF) in a polytetrafluoroethylene (PTFE) matrix are used extensively in the assessment of personal radiation dose. An anomalous darkening effect of a single batch of discs and the corresponding sensitivity loss were investigated. The possibility of contamination with grease or dust is hypothesised. Cleaning according to the manufacturers' instructions (washing in chloroform, methanol, distilled water, ultrasonic cleaning, with and without annealing) promoted discoloration. Other possible causes are examined. Recommendations are given for the manufacture and use of LiF:PTFE discs.
NRPB:R37, National Radiological Protection Board, Didcot, Oxon. H.M. Stationery Office, P.O. Box 569, London, S.E.1, United Kingdom, Aug. 1975. 13p. Illus. 7 ref. Price: £0.50.
The safe cleaning, repair and demolition of large tanks for storing flammable liquids.
This note gives advice on gas freeing, cleaning and inerting procedure for repairing and demolishing large tanks of this category. Subjects dealt with include: fire and explosion hazards; precautions to be taken with large tanks for low-flash liquids (flash point below 38°C) and less volatile substances (flash point over 38°C); legal requirements.
Technical Data Note No.18 (Rev), H.M. Factory Inspectorate, Department of Employment, London. H.M. Stationery Office, P.O. Box 569, London S.E.1, United Kingdom, 1973. 4p. Gratis.
Variations in hydrocarbon gas concentration during supertanker cleaning operations
This short article discusses some of the results obtained by exact measurements of gas concentrations aboard a very large crude carrier (VLCC) before and after unloading crude oil and before, during and after tank cleaning operations. Samples were drawn from different levels below deck, and concentrations of each of the hydrocarbon gases from methane to hexane were determined by gas chromatography. Forced ventilation brought total gas concentration well below the lower explosion limit. Pronounced changes were found in composition of gas mixture in the ullage and in the empty tank before and during washing.
Nature, 19 Jan. 1973, Vol.241, No.5386, p.196-197. Illus. 7 ref.
Environmental problems associated with the manufacture and use of coated materials
8 papers presented at a Conference organised by the British Occupational Hygiene Society (Swansea, 14-15 September 1971). Individual subjects treated include: the control of solvent emission from solvent vapour cleaning plants; chromium plating; some environmental problems of the metal spraying processes; paints and painted surfaces; the danger of lead in paints; metal coating in heavy engineering; epoxy resins in surface coatings; environmental problems in the production of printed circuits. (For the complete proceedings of this Congress, see CIS 73-373).
Annals of Occupational Hygiene, Apr. 1972, Vol.15, No.1, p.83-155. Illus.
Weichardt H., Lindner J.
Field studies in solvent plants - First report: Measurement techniques for determining solvent concentrations at various trichloroethylene degreasing installations
Felduntersuchungen in Lösungsmittelbetrieben - 1. Mitteilung: Messmethoden zur Überprüfung des MAK-Wertes an verschiedenen Trichloräthylen-Waschanlagen [in German]
Description of a measurement programme for an industrial hygiene survey (solvent analysis; urine, blood and expired-air analysis; measurement of exposure time; continuous and intermittent air sampling and analysis) and of the investigation of open, semi-covered and closed degreasing vats. Following discussion of the measurement methods used (detector tubes, adsorption on activated charcoal, ultraviolet and infrared photometry, gas chromatography), the results of urine, blood and air analyses are reported; these analyses have demonstrated the superiority of closed, automatic installations.
Zentralblatt für Arbeitsmedizin und Arbeitsschutz, Nov. 1972, Vol.22, No.11, p.323-332. Illus. 19 ref.
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