Ventilation - 744 entries found
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Ventilation systems for restaurant kitchens
Lüftungstechnische Anlagen in gewerblichen Küchen [in German]
Guidelines for the construction and maintenance of ventilation ducts and exhaust hoods with reference to German standards and regulations. Calculation of exhaust hoods. A false ceiling with incorporated ventilation is described. Information is given on the choice of ventilation equipment. Control systems are also discussed.
HLH - Zeitschrift für Heizung, Lüftung, Klimatechnik, Haustechnik, Feb. 1974, No.2, p.55-59. Illus. 6 ref.
Airflow through a slot between two surfaces arranged at an angle
Vsasyvajuščij fakel u ščeli meždu dvumja stenkami, raspoložennymi pod uglom [in Russian]
Local exhaust is often through a slot between 2 inclined surfaces. In order to assess the aerodynamic efficiency of such flow, the author carried out a mathematical analysis of the laws governing it. Equations were established for the determination of air velocity at any point and for the determination of flow lines and equal velocity lines. The relative axial air velocity in the axis of symmetry of the slot is equal to 1.02 and diminishes towards the edges.
Vodosnabženie i sanitarnaja tehnika, Jan. 1974, No.1, p.21-23. Illus. 2 ref.
The 1970 Occupational Safety and Health Act contains a number of specific ventilation requirements for various typical industrial situations. This article describes in simple terms how these requirements can be met by local exhaust systems and how their performance can be checked. Particular attention is paid to the use of common-type instrumentation for determining air velocity and air pressure.
National Safety News, Feb. 1974, Vol.109, No.2, p.49-56. Illus. 2 ref.
Notification No.4/1974 concerning the evacuation of anaesthetic gases from operating theatres, recovery rooms, etc.
Meddelelse nr.4/1974 om bortledning af anæstesigasser fra operationsstuer, opvågningsstuer m.v. [in Danish]
These directives call for effective exhaust ventilation of operating theatres and recovery rooms. The ventilation system should be designed in such a way that the air exhausted cannot be recirculated and that the vapour concentration in the air does not exceed 25% of the lower explosion limit.
Directorate of Labour Inspection (Direktoratet for Arbejdstilsynet), Upsalagade 20, 2100 København Ø, Denmark, 8 Feb. 1974. 2p. Gratis.
Vinyl chloride monomer - Advisory notes for PVC processors.
Data collected in a number of PVC processing plants to identify operations (warehousing, PVC compounding operations, PVC fabrication process) during which residual vinyl chloride monomer (a suspected carcinogen) is released into the work atmosphere are summarised. Advice is given concerning the optimal siting of ventilation.
British Chemical Industry Safety Council of the Chemical Industries Association, Alembic House, 93 Albert Embankment, London SE1 7TU, United Kingdom, May 1974. 4p.
Ventilation conditions of operating theatres - Laughing-gas concentrations in operating theatres
Operationsrume ventilationsstandard - Lustgaskoncentrationer i operationsrum [in Swedish]
Ventilation measurements carried out in 21 operating theatres showed that only 2 of them had the minimum air exchange rate of 2000 m3/h required by Swedish standards. Results of measurements with an infrared analyser to determine the nitrous oxide concentrations in these operating theatres during operations are reproduced. The author established correlations between nitrous oxide concentrations and the air exchange both for theatres with and without local exhaust systems. He proposes a method for calculating personnel exposure to different anaesthetics. The minimum air exchange rate of 2000 m3/h should be observed and the room volume should be large enough to avoid draughts.
Arbete och hälsa - vetenskaplig skriftserie, 1974:3. Arbetarskyddsstyrelsen, Fack, 100 26 Stockholm 34, Sweden, 1974. 41p. 6 ref. Price: Swe-cr.10.00.
Csanâdy Z., Kiss R.
Ventilation of chemical plant - New method for the exact calculation of rim exhaust from surface treatment vats
Entlüften von Chemieanlagen - Neues exaktes Verfahren zum Bemessen der Randabsaugung von Behandlungsbädern [in German]
The proposed formula takes into account the following factors: surface area of vat, environment, location of rim exhaust vents, air turbulence due to arrival of fresh air, heat given off from the vat and toxicity of vapours. The basic principles involved, influence of the vat temperature and required rate of exhaustion are described. Examples of calculation.
Technische Rundschau, 12 June 1973, Vol.66, No.25, p.9-13. Illus.
Some aspects of ventilation in industrial workshops and plants
Quelques aspects de la ventilation des ateliers et des installations industrielles. [in French]
Brief review of the principal sources of workplace atmospheric pollution; discussion of the basic principles involved in designing the necessary ventilation systems. The author describes 4 examples of original ventilation and exhaust equipment: a system for the removal of airborne dust around two 3t electric furnaces situated on each side of the same casting pit; a wet dust-collection system installed on a cupola furnace; a fume exhaust system on a pickling vat; a local exhaust ventilation system for removing dust raised in brushing away enamel chips in brush enamelling.
Caisse régionale d'assurance maladie du Nord de la France, 11 boulevard Vauban, 59024 Lille Cedex, France, 17 Dec. 1973. 17p. Illus. Gratis.
Causes of recirculation of contaminated air in spray booths
Příčiny recirkulace kontaminovaného vzduchu ve stříkacích kabinách [in Czech]
From the results of tests on models, the reasons for abnormalities in air circulation and for the increase in concentrations of harmful substances in the working area of spray booths with ceiling ventilation are given; the flow of the air supplied through the ceiling narrows towards the centre of the booth; the vitiated air circulates along the walls, forming a turbulent zone in the breathing area. This phenomenon is due to pressure conditions in the vicinity of the air inlets as well as to convection currents forming on the wall surfaces, which have a higher temerature than that of the air in the booth. To overcome this situation, the fresh-air flow must be divided into several streams so that the walls have a fresh-air flow sweeping over them; the velocity of the air supply should also be increased. A detailed description is given of several specific cases, with appropriate solutions.
Pracovní lékařství, Oct. 1973, Vol.25, No.9, p.381-386. Illus. 1 ref.
Maisonneuve J., Lardeux P.
How to treat the problem of pollutant removal at the workpost - Study stages
Comment traiter un problème de captation des polluants au poste de travail - Les étapes de l'étude. [in French]
Guidelines are given for dealing with ventilation or dust control problems in industry in a synthesis based on previous studies. The search for an appropriate solution requires a preliminary survey of the work being done, the area occupied by the workers, the pollutant, the pollutant source and the frequency of its emission. The chief parameters which should be considered in designing the system are: air speed, rate of airflow, direction of collection, couplings, pressure drops in ducts, airflow noise, etc. The application of the method to the design of a small sawdust and shavings exhaust system is described. Tables and charts containing the data required for these calculations are given.
Cahiers de notes documentaires - Sécurité et hygiène du travail, 4th quarter 1973, Note No.866-73-73, p.453-469. Illus. 6 ref.
Painting under canvas
Peinture sous toile. [in French]
Disadvantages and limitations of folding canvas painting booths, the use of which is becoming more widespread on account of their low cost and convenient use. However, these booths do not seem to comply with the requirements of the decree of 23 Aug. 1947 respecting the protection of spray painters and varnishers. The article describes various booths and gives the results of smoke tests carried out on a 15 x 6m booth. The findings cover: ventilation; maintenance of canvas walls, lighting, heating, fireproofing and means of egress.
Travail et sécurité, Oct. 1973, No.10, p.480-481. Illus.
Local exhaust system for lathes
Aspiracionnoe ustrojstvo dlja tokarnyh stankov [in Russian]
The design of local exhaust systems for lathes is complicated by the problem of air turbulence around the chuck. The author has studied various aerodynamic profiles for the exhaust hood; the best corresponds to a logarithmic spiral.
Vodosnabženie i sanitarnaja tehnika, Oct. 1973, No.10, p.24-26. Illus. 3 ref.
Fox R.H., Nicol J.F.
Heating, ventilation and higher productivity.
General discussion of thermal comfort in the working situation with consideration of physiological and climatic factors and their relation to typical complaints about the working environment. Graphs are reproduced relating comfortable temperatures with different amounts of clothing and the sensation of thermal comfort with temperature variations.
Work Study and Management Services, Dec. 1973, Vol.17, No.12, p.876-878, 890. Illus. 3 ref.
Industrial ventilation - Compilation of contributions
Promyšlennaja ventiljacija - Tematičeskij sbornik [in Russian]
Compilation of studies by various authors on the following subjects: calculation of the aerodynamic factors which influence heat transfer and dust collection; airflow velocity profiles; natural ventilation of industrial buildings; painting-shop ventilation; foams and foam generators for dust control; rapid method for determining dust particle-size distribution; dust collector for use during the turning of graphite parts; regeneration of fibrous filters; dust collectors; local exhaust; aerodynamic features of deflectors; mathematical models.
Vsesojuznyj central'nyj naučno-issledovatel'skij institut ohrany truda, VCSPS, Obolenskij per. 10, Moskva G-21, USSR, 1973. 190p. Illus. 92 ref. Price: Rbl.1.12.
Fans - Design and operation of centrifugal, axial-flow and cross-flow fans.
This comprehensive textbook is intended for engineering students, designers and practising engineers. It consists of 25 chapters arranged in 8 parts: centrifugal fans; axial-flow fans; blowers; special problems and uses (mine ventilation, boiler fans); constructional shapes and features; sound generation and sound attenuation of fan installations; strength calculations; experimental testing of fans. Industrial applications are dealt with in detail and a great deal of attention is paid to the fundamentals of fluid dynamics as they apply to fans.
Pergamon Press, Headington Hill Hall, Oxford OX3 OBW, United Kingdom, 1973. 592p. Illus. 275 ref. Price: £15.00.
Astleford W.J., Register J.W.
Southwest Research Institute, San Antonio, Texas 78284, USA.
Engineering control of welding fumes.
Description and results of studies and experiments carried out with a view to evaluating the health hazards of various welding processes and to developing criteria for the design of adequate local exhaust systems for the control of welding fumes. Welding fumes (including particulate and gaseous fluorides) were sampled and analysed, and various systems were tested: a cross-draft table, a free-standing rectangular hood and a low-volume, high-velocity fume extracting welding gun. The results are discussed in detail.
Final report. Contract No.HSM 99-72-76, National Institute for Occupational Safety and Health, 5600 Fishers Lane, Rockville, Maryland 20582, USA, July 1973. 112p. Illus. 13 ref.
Siebert G.W., Fraser D.A.
Exhaust ventilation for hot processes.
Industrial processes involving molten metal, furnaces, ovens, etc. present different ventilation problems than cold processes by reason of the thermal draft created above the source. Laboratory investigations were carried out on a small model of a hot process with a low-canopy exhaust hood. It was found that the exhaust airflow rate calculated by means of Hemeon's empirical formula is approximately twice that found in the present controlled laboratory conditions. However, the values predicted from Hemeon's equation appear to be a safe approximation for industrial environments. Minimum exhaust airflow rates vary with the temperature and surface area of the process.
American Industrial Hygiene Association Journal, Nov. 1973, Vol.34, No.11, p.481-486. Illus. 4 ref.
Sepsy C.F., Pies D.B.
An experimental study of the pressure losses in converging flow fittings used in exhaust systems.
Final report on a research project undertaken for the National Institute for Occupational Safety and Health. The results are given in graphical form of an experimental and analytical study of pressure drop in commercial converging-flow fittings for exhaust ventilation systems. 49 fittings over a wide range of sizes and branch angles were studied in the experimental phase, and the analytical study consisted of developing semi-empirical equations which would be applicable to fittings with tapered mainstreams and 30°, 45° or 90° branch angles for all combinations of branch, upstream and downstream diameters. It was observed that pressure-drop design data for converging-flow fittings must be expressed in terms of pressure drop from upstream to downstream; 2 dimensionless pressure-drop parameters are defined and reproduced.
College of Engineering, Ohio State University, Columbus, Ohio, USA, Apr. 1973. 44p. Illus. 3 ref. Gratis.
Standard for the installation of blower and exhaust systems for dust, stock and vapor removal or conveying.
This standard lays down requirements applicable to blower and exhaust systems to eliminate or reduce known fire and explosion hazards. Individual sections are devoted to: general requirements; systems for removal of flammable vapours and residue; duct systems for moving, conveying or transporting stock, vapour or dust; plastic systems for removal of non-flammable corrosive fumes and vapours.
NFPA No.91-1973, National Fire Protection Association, 470 Atlantic Avenue, Boston, Massachusetts 02210, USA, 1973. 29 p. Illus. Price: US-$1.25.
Recommendations for the ventilation of lead accumulator plate manufacturing plants
Rekomendacii po ventiljacii osnovnyh cehov zavodov svincovyh akkumuljatorov [in Russian]
Description of enclosures and exhaust systems on lead-melting tanks and accumulator-plate casting machines and conveyors. Various methods of local exhaust to eliminate lead aerosols and dust, hydrocarbons and ammonia are tabulated, together with the required air speed at the exhaust inlet. An equation is given for determining the air volume required for the dilution ventilation of accumulator stores with high sulfuric-acid concentrations. Special air-inlet arrangements are recommended for rooms where hydrogen may accumulate and form explosive atmospheres.
Naučnye raboty institutov ohrany truda VCSPS, 1973, No.83, p.18-21. Illus. 5 ref.
Nomogram for calculating exhaust systems
Nomogramma dlja rasčeta aspiracionnyh otsosov [in Russian]
Mathematical considerations lead to the derivation of a nomogram for the determination of air volumes to be exhausted from enclosed plant and processes giving rise to both air pollutants and heat.
Naučnye raboty institutov ohrany truda VCSPS, 1973, No.83, p.12-14. Illus. 4 ref.
Parameters for microclimate forecasting
Kenngrössen für die Klimavorausberechnung [in German]
Microclimate data collected in German mines during the summer of 1971 are used to calculate several thermal parameters applicable in air conditioning (equivalent thermal conductivity, humidity), with reference to various factors influencing the mine microclimate: daily tonnage of conveyed run of mine, conveyance density, caving system, pneumatic stowing, solid stowing, rate of airflow, damp and dry airways. Considerations concerning ventilation air losses due to air circulation in goaves, with statistical data tabulated for 1971.
Glückauf, 21 June 1973, Vol.109, No.13, p.675-681. Illus. 6 ref.
Ventilation and air renewal
L'aération et la ventilation. [in French]
The atmosphere of premises may be vitiated by the occupants (oxygen consumption, release of CO2, emanation of odours and humidity, generation of heat), by the work performed on the premises, or by outside air. The ambient air quality must be corrected constantly and vetilation of the premises must be ensured. Natural ventilation (doors, windows, air vents, fanlights, skylights, etc.) is of only limited and variable value. Mechanical ventilation may be local (removal of pollutants) or general (ventilation for air renewal or thermal comfort, or ventilation by conditioned air). This type of ventilation may be provided by blowing in outside air (pressurising the premises) or by exhaust ventilation to remove vitiated air (negative pressure), by a combination of both systems or by controlled mechanical ventilation. Description of fans (axial flow, centrifugal and mixed-flow).
Cahiers de médecine interprofessionnelle, 1st quarter 1973, Vol.13, No.49, p.53-67 + 6p. detachable data sheet. Illus.
Panov S., Talev N.
The vertical distribution of air pollutants in welding shops without fixed welding sets
Vertikalno razpredelenie na vrednostite v zavarăčnite cehove bez stacionarni zavarăčni postove [in Bulgarian]
Results of investigations into the air exchange in welding shops show that, under the conditions investigated, it is not possible to speak of maximum dust concentrations at a given height above the shop floor. The investigations also proved that the highest dust concentrations are generally found immediately under the shop roof, and this regardless of its height. The concentrations measured in the working zone and close to the welding sets were lower than those measured at other points of the shop because of the dilution ventilation provided by outside air which enters into the floor zone of the shop.
Dokladi ot naučnata sesija po promišlena ventilacija i borba s praha, Minsterstvo na narodnoto zdrave, Sofia, Bulgaria, 1971, p.126-135. Illus. 8 ref.
Illiev I., Rukov B.
Study of the effectiveness of four-sided slot exhausts on electroplating vats
Izsledvane efektivnostta na okolovrăstni bordovi smukateli za galvanični vani [in Bulgarian]
Dangerous vapours emanating from electroplating baths are generally eliminated by local exhaust systems. Practical studies showed that the volume of air to be exhausted can be considerably reduced by using 4-sided slot exhausts and lip exhausts, instead of double-sided slot exhausts of the ordinary type. 4-sided lip-type exhausts offer enough practical advantages and economy to compensate for their more sophisticated installation and the loss in bath surface. The studies carried out also confirmed that the visual method of evaluating the elimination of air pollutants by local exhaust is as efficient as the method which consists in carrying out chemical tests.
Dokladi ot naučnata sesija po promišlena ventilacija i borba s praha, Ministerstvo n narodnoto zdrave, Sofia, Bulgaria, 1971, p.164-174. Illus. 2 ref.
A simple method for controlling pollution due to beryllium
Une méthode simple pour contrôler les contaminations dues au béryllium. [in French]
During the drawing from the kiln of beryllium oxide ceramics, local exhaust ventilation is provided by means of a vacuum pump coupled to a detachable filter by a flexible tube. The operator is thus protected from polluted air and the filter retains the substances which will serve to check the level of pollution. A simplified method is described for BeO dosage, based on the fluorescence of morin. An appendix gives a description of beryllium poisoning symptoms and means of medical prevention.
Travail et sécurité, Sep. 1973, No.9, p.418-424. Illus. 7 ref.
Anderson D.P., Anglin M.C., Ayer H.E., Carson G.A.
Identification of the quality and quantity of biologically significant cotton mill dust.
Cotton dust is clearly related to respiratory disease amongst textile workers. Although the specific aetiological agent has not been isolated, it is known that it is contained in the "trash" portion of cotton dust, the mineral and lint portions being of minor hygienic importance. Several sampling techniques for cotton dust are described, notably the vertical elutriator method which correlates well with byssinosis prevalence. Exhaust ventilation, which is available, will be necessary to reduce dust levels below the threshold limit value until the aetiological agent is isolated and can be removed from the cotton before processing.
Journal of Occupational Medicine, Mar. 1973, Vol.15, No.3, p.302-305. Illus. 15 ref.
Organisme professionnel de prévention du bâtiment et des travaux publics.
Measures to control pollutant exhaust gases from internal combustion engines in confined spaces
Lutte contre les gaz polluants issus des moteurs thermiques en milieu confiné. [in French]
Refers to confined spaces such as are found in underground excavations, wells, deep trenches, vats, etc. Recalls the French legislation on the subject, defines the nature of the hazard (gas and toxicity thresholds) and recommends safety measures. Petrol-driven engines should be avoided on account of the difficulty of purifying the exhaust gases. Mechanical and chemical means are recommended for use with Diesel engines. It is essential that the ventilation for each work site should be carefully considered and calculated beforehand.
Fiche de sécurité No. D.401. Cahiers des comités de prévention du bâtiment et des travaux publics, Issy-les-Moulineaux, France, May-Aug. 1973, Vol.28, No.3-4, p.107-110.
Dust control - The low-volume high-velocity system.
Description of a system which can be applied to portable tools and machine tools; it uses very high air velocities passing through aerodynamically designed and located orifices to overcome the dispersive forces generated by the tools themselves and achieves a high standard of dust control. The note describes the equipment and its method of use, specifies extraction rates for various tools, indicates hose and ducting dimensions, and gives general advice on the construction and installation of ducting systems.
Technical Data Note No.1, (Rev), H.M. Factory Inspectorate, Department of Employment, London. H.M. Stationery Office, P.O. Box 569, London S.E.1, United Kingdom, 1972. 3p. Illus. Gratis.
Woods practical guide to noise control.
Keeping the mathematics to a minimum, the author sets out the principles of sound attenuation, with major emphasis on the measurement and control of noise in ventilating systems. Chapters deal with the fundamental concepts of noise physics and hearing, the measurement of acoustic properties, the principles of noise level calculation, the calculation of noise in ventilating systems, the principles of noise control, and examples of noise control.
Woods of Colchester Ltd., Tufnell Way, Colchester CO4 5AR, United Kingdom, 1972. 208p. Illus. 35 ref. Price: £2.00.
Heating and ventilation of foundries
Chauffage et ventilation dans les fonderies. [in French]
French translation of: Heating and ventilation of foundries. Foundry Trade Journal, London, United Kingdom, Sep. 1971, Vol.131, No.2858, p.379-380 and 383. Illus. The author examines some of the problems of ensuring a good working environment in foundries. He states the requirements for adequate heating and ventilation, considers the various factors involved (air-renewal in old and new buildings, dust collection, fume and smoke exhaust, air-pressure differential preventing air flowing from dirty areas to cleaner parts of plant, etc.). Brief description of ventilation and heating methods and equipment for obtaining an acceptable microclimate.
Translation INRS 115 A-72, Institut national de recherche et de sécurité, 30 rue Olivier-Noyer, 75680 Paris Cedex 14, France 1972, 9p. Illus.
Control of fan and compressor noise
A series of 6 papers presented at a seminar held at Washington, D.C., USA, on 23 April 1971 under the following titles: Sources of noise in axial flow fans; Research on fan noise generation; Theory and measurement of model spectra in hard-walled cylindrical ducts; Analysis, testing and design of lined ducts; Blade interaction noise from lift fans; and In-duct investigation of subsonic fan "rotor alone" noise.
Journal of the Acoustical Society of America, May 1972, Vol.51, No.5 (Part 1), p.1411-1482. Illus. 116 ref.
Ventilation and air conditioning
Větrání a klimatizace [in Czech]
This book is intended for design engineers, and for all those responsible for improving and supervising the workplace environment. Individual sections are devoted to: microclimate and man; criteria for the design of ventilation and air-conditioning systems; ventilation and air-conditioning theory; ventilation and air-conditioning system components; ventilation and air conditioning in public and residential buildings; ventilation and air-conditioning in industry and agriculture (hot workplaces, wet workplaces, dusty workplaces, dangerous gases and vapours, textile industry, paper mills, tobacco works, etc.); local exhaust ventilation in industry; automatic control of air conditioning; operation and economic aspects of ventilation and air-conditioning installations.
SNTL-Nakladatelství technické literatury, Spalená 51, Praha, Czechoslovakia, 1971. 562p. Illus. 206 ref.
Graph calculation of natural ventilation
Grafický způsob výpočtu přirozeného větrání [in Czech]
Determination of natural ventilation in a building with numerous ventilation orifices necessitates, in view of wind effects and pressure gradients due to internal/external temperature differences, long and complicated calculations for the determination of internal pressure which is essential for calculating pressure differences for each orifice. The calculations can be considerably simplified by use of a nomogram and graphs. The author's method is described.
Zdravotní technika a vzduchotechnika, 1971, Vol.14, No.5, p.233-241. Illus.
Slot exhaust ventilation devices
Panel'no-ščelevye otsosy [in Russian]
The author explains, with diagrams, the operating principle of simple slot exhaust ventilation devices which are particularly suitable for welding tables, salt baths, electric steel melting furnaces, knockout tables, pan grinders, etc. The devices comprise a steel plate at 30° to the vertical, at the rear of the fume or dust source, equipped with a horizontal slot connected via ducting to a radial fan. A formula for slot-dimension calculation is given.
Mašinostroitel', Feb. 1972, No.2, p.27-28. Illus.
Radon daughters and age of ventilation air
A contribution to the study of the distribution of radon daughters throughout an uranium mine ventilation system, taking into account the concept of radioactive "age" of the air and the processes which affect radon daughter concentrations in mine ventilation air.
Health Physics, July 1972, Vol.23, No.1, p.118-120. Illus. 6 ref.
Experience with an artificially lit and ventilated factory
Erfahrungen mit einer künstlich beleuchteten und belüfteten Fabrikanlage [in German]
Description of a factory building (12.600m2, manufacturing telecommunications equipment, 1000 employees) artificially lit and ventilated and devoid of all roof glazing: factory characteristics, operation with and without heating, regulation of atmospheric humidity, lighting, colour selection, sound levels, dust collection. Special reference is made to microclimate control.
WT - Werkstattstechnik, 1972, Vol.62, No.4, p.189-193. Illus. 1 bibl.
Safety and Health Division, Labour Standards Bureau of the Ministry of Labour (Tokyo)
Design and maintenance of local exhaust ventilation systems
Kyokusho haiki sōchi no hyōjun sekkei to hoshū kanri [in Japanese]
An in-depth guide to the design, construction, selection, inspection and maintenance of local exhaust ventilation systems for the collection of hazardous dust, mists, vapours and gases.
Japan Industrial Safety Association (Chuo Rodo Saigai Boshi Kyokai), 35-4, 5-Chome, Shiba Minato-ku, Tokyo, Japan, May 1972. 167p. Illus. 33 ref.
Górczak F., Piórek S.
Maintaining air purity at the welder's work point in shipbuilding by use of the IWO-8 ventilation system
Zapewnienie czystości środowiska powietrznego na stanowiskach pracy spawaczy okrętowych za pomocą urządzenia wentylacyjnego IWO-8 [in Polish]
After reviewing the various techniques available for the ventilation of shipbuilding welders' work points, the authors indicate the requirements to be met by a local exhaust ventilation system and describe the device designed for welding in confined spaces to which access is difficult, and in tanks. This system, the "IWO-8', was suitable in field trials and reduced welding fume concentrations in double-bottoms and ships' tanks to below prescribed levels.
Prace Centralnego instytutu ochrony pracy, 1972, Vol.22, No.73, p.93-103. Illus. 7 ref.
De Maisonneuve J., Lardeux P.
Ventilation of work premises and work posts - Examples - 6. Handling of dusty lead-based materials
Ventilation des locaux et postes de travail - Quelques exemples - 6. Manipulation de produits pulvérulents à base de plomb [in French]
Description of an installation for collecting dust given off during the manufacture and handling of particulates for the pottery industry (pigments, glazes, etc.). A negative pressure is created at the work post but minimal particulate entrainment is ensured; provision is made for removing deposited dust from exhaust ventilation ducts. Data on system design and calculation are given.
Cahiers de notes documentaires - Sécurité et hygiène du travail, 3rd quarter 1972, No.68, Note No.800-68-72, p.279-283. Illus.
Coal mine ventilation.
This guide is to assist instructors in enabling miners to increase their knowledge of coal mine ventilation practices and to maintain adequate face ventilation in accordance with their ventilation plan. It is in 4 parts: suggestions to the instructor; introduction to the course; text of course; and visual aids. The course is supplemented by a questions and answers section, an instructor's course evaluation form, and 3 short appendices. The 32 visual aids are available in various forms (slides, flip charts, etc.).
Instruction Guide 1, Bureau of Mines, Publications Distribution Branch, 4800 Forbes Avenue, Pittsburgh, Pennsylvania 15213, USA, Apr. 1972. 85p. Illus.
Popov I.I., Raskidkin V.K.
The use of synthetic foamed-film-forming agents in underground mining
Ispol'zovanie sintetičeskih penoplenkoobrazujuščih sostavov v gornyh vyrabotkah [in Russian]
The concentration of toxic and explosive substances given off during the application of foamed-film-forming agents for sealing ventilation ducts and partitions in an experimental gallery is considered. The agents studied consisted of apoxy and coumarin-indane resins, plasticisers, self-extinguishing additives, polyethylenepolyamine and toluene. The concentrations of toluene, epichlorohydrin, vinyl chloride and tricresyl phosphate measured during hand and spray application are given. Formulae for the ventilation rates required during hand and spray application are developed; the air-temperature dependence of the necessary correction factor is presented in graph form. First aid and measures for the protection of skin and mucosae are described.
Bezopasnost' truda v promyšlennosti, Apr. 1972, No.4, p.42-43. Illus.
Level of protection provided by general and local exhaust ventilation installations - Features and requirements
Schutzgüte von Absaug- und Lüftungsanlagen - Merkmale und Anforderungen [in German]
Following basic data on the design of ventilation equipment, two sections are devoted to requirements to be met by general and local exhaust ventilation installations: layout, dimensioning, ducting, air flow, manufacturing requirements, exhaust ventilation equipment, dust collectors, air heating and cooling equipment, safety and comfort of production and maintenance workers, etc. Information is also given on noise control, suppliers and standards.
Verlag Tribüne, Am Treptower Park 28-30, DDR - 1193 Berlin, 1972. 51p. Illus. 14 ref.
Instructions for planning heating and ventilation plant in lead-accumulator factories
Ukazanija po proektirovaniju otoplenija i ventiljacii zavodov svincovyh akkumuljatorov [in Russian]
Basic rules for the elimination of air pollutants in workplaces and the removal of gaseous emanations from accumulator factories, the planning and construction of industrial buildings, and the planning of production processes. Instructions for the heating and ventilation of workplaces (with table of local exhaust ventilation systems adapted to certain types of work), and for filtering and purifying intake air. Numerous diagrammes illustrating the principles of ventilation and exhaust systems are appended.
Vsesojuznyj central'nyj naučno-issledovatel'skij Institut ohrany truda VCSPS, Leningrad, USSR, 1971. 56p. Illus.
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