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Cathodic Protection: For high heads, and where water hammer is a dominant factor, plate steel with modern welded shop joints and Dresser couplings for field joints, and steel cylinder prestressed pipe produce satisfactory conduits. Metal conduits should be safeguarded against tuberculation by cement-mortar lining, bituminous coating, or cathodic protection. As compared to cast-iron pipe in sizes above 48 inches, these types are cheaper and are less damaged by blowouts; but steel pipe must be protected by air-and-vacuum valves against collapse.
Instruments for Personnel Protection.—In order to provide maximum protection to personnel from the hazards of excessive nuclear radiation, three types of monitoring procedures are used in regions where exposure is likely; these include area monitoring, survey monitoring, and personnel monitoring.
Respirators are robust, being made from molded rubber or plastic. They have an exhalation valve and a replaceable cartridge Filter that resists organic vapor and paint spraying. You have to insert the appropriate Filter for the substance being used. Safety glasses Typical jobs requiring eye protection are sanding, painting a ceiling with a textured compound, spraying paint, and most metalwork tasks. Whenever you are using chemicals, make eye protection a priority. |
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