Document 93JRMw251QpnZ0Z2gvwRGrYL5

More POWER NEWS M POQ 114 Underground Corroilon of Oolvoniiod Stool Pipe A study of underground corrosion of hot-dipped galvanized steel pipe has recently been completed by the National Bureau of Standards. Results confirm previous NBS work by showing that galvanized steel having 3 ounces of sine per square foot of exposed surface Is highly resistant to corrosion in many soils which are very corrosive to bare steeL For the Bureau's study, short lengths of both galvanized and uncoated steel pipe, end also plates of zina, were burled si IS test sites for periods up to 13 years. The sites, located In widely separated parts of the United States, represented a wide range of soil proper* ties. Zinc coatings gave good protection In most ol the soils. In ono sol) in which bare Heel pipe was perforated by cor rosion after exposure (or only e few years, the coating on tba galvanized specimens remained perfectly continu ous for the entire 13-year period. In only two of the IS soils, both organic, was the zinc coaling of negligible -pro* teetive value. In order to get maximum life from galvanized pipe In practice, it Is neces sary either to construct the entire piping system of galvanized pipe or else elec trically insulate the galvanized sections from pipe of other metals. Otherwise, the tine coating will be removed by galvanic action. The General Electric Co will manufsclure (be first Urge generator with liquid* cooled conductors In iho history of the electrical Industry. A new method of cir cuiting s liquid through hollow conduc tors will be used in tho stator of a turbinegenerator set,for the new Eeitlake power plant of the Cleveland Electric Illuminating Co. The unit, consisting of s lindem-compound turbine rated at 208,000 kilowatts snd generator rated st 260,000 kva, will be ene of iho largest In the world. This generator, alone, will be eapoble of supply ing the household electrical needs of 600,. 000 people. Other tetholcsl features of the Cleveland machine Inetodo direct cooling of the ro uting field winding with hydrogen, a new and improved grein-orieoled aJrip steel in the mtgnetlo portion of tho armature, and tn Improved type of Insulation. CE to also supplying three conventional hydrogen-cooled units, each of 125/X)0 kilo watts cspselty, for the Eaitlake plant, which win go Into operation this summer. - The 208,000 kilowatt generator Is scheduled for Installation by the end of 1955. Dependabi POWER--HEt Ticotherm STEAM GENERATORS; Thin battery of four Ticotherm,' Steam Generators dependably" and economically serves tba. power and heat requirement!] of tho 2000-patient Franklin' ' Delano Roosevell Veterans' Administration Hospital a! Peekakili, Now York. Ticotherm Stoam Generators are always your sound choice for maxi mum stoam output at lowest, oporalinq cost. Write for details/ : . i^cnnzctinn iU3iio:u tt0 TAvx*v -umato && t&er.o (nmn-xcasi 319 POWII 11 l .'ft 5IV V JjL0I!Sffl CRIB AVi. AND O 5T.. .PHILADELPHIA S4, PA. NIW YORK HIIIIUMI CHICAOO HOUYYON - ,YMCHU0. V*. Industrial Goars and Speed Reducers l/miTorquo Volvo Controls ft