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POWER ENGINEERS' NOTEBOOK PLANT-TtSHD IDEAS TO SOW PROBLEMS Of DESIGH, OPERATION AND MAINTENANCE BRGDGE-LWE TRUSS SUPPORTS STACK BREECHING Tm* ARRANGEMENT of breeching made possible by supporting it M truss, left The initnlUtion connects tke powerhouse and stack ol the Homer Woolen Mills, Eaton Hapids, Mich. Tbs breeching is fabricated of wrought.jron plate. It was Mleeted after tests of various metals because el Its resistance to flue-gas corrosion. Sat&pU ' metals were tested in original breech ing to determine suitability. The' structure was designed by Cummins and Barnard, Ann Arbor, Micku, sod installed by Jarvis Engineering Works. J ) Welch Pittsburgh, Pa, YARD PIPELINE CROSSONG PROMOTES SAFETY Where large pipelines, laid above ground, must be crossed by personnel, insinuation of a fixed crossing con centrate! foot traffic along paths and eliminates hazards of vaulting or scrambling over the line ol various points. At the right are shown precast step sections rnsde from concrete, with nonslip treod sections fixed in the forms before tho concrete is poured. A fight, welded steel structure, complete with handrails, bridges the gap between steps. The bridge unit fits into chan nel-iron facing strips, precast In the step blocks. The steel cross members of the bridge ore tack welded tu the channels at the four corners. This precaution cheeks any tendency of the bridge to tilt in re sponse to a hord tug at the top of the sloping section. If the pipe must be lifted free of (he crossover for ony reason--Instead of being pulled through endwiso--the (our tack welds ere cut with a torch and the bridge unft lifted free, without disturbing * the concrete step sections. These units help maintain attractive appearance of (ho yard and promote safe habits. Elton Sterrett flourton, Texas REBUILDING BLADES SALVAGES OLD STEAM TURBINE We had an obsolete mixed-pressure 6stage impulse turbine that ran well but had to be watched closely. One day something entered the third stage, through the 1-p inlet, and damaged the blading in the rear end. Stages 3 and 4 weren't too bod, hut stages S and 6 had large segments broken out of the blading and nozzle edges. Age of the unit made it doubtful whether replace ment parts should bo made. Dloding of tho first five stages was bronze, and the last stage steel. We decided to try filling out tho broken blades with manganese bronze. The broken places were ground out and vee'd on an emery wheel. By laying the blade on an Iron block, as in the figure, loft, with outside flat surface down the inside surface was first filled (the At-ln. iron rod giving the bronze ao adhering surface) and the blade then tuned over and the outside finished. The rod was knocked off on an emery wheel afld the blade band finished with half-roufld files. Damaged nozzles were repaired by straightening and brazing. Cstefal reinstallation and baloncing of tho 300 blades in the last two stages gave atisfactory service lor another nine years The welding job was somewhat tedious, but we estimated that several thousand dollars were saved. W L Larson Ktamnih Falls, Of< (Continued on page 104) 102 (H4) ROWfR Juiw ltd* SUNYIS DIESEL LUBRICANTS... Keep This Engine Operating Smoothly, All . Piston Rings Free and Bearings O.CC. This TJO-h.p,, d-cylinder, Worthington diesel, direct-connected to on electrie generator, has boon completely protected by Sunvii Oils since the day h wqi Installed. -- Recently It was loro down for Inspection offer 9,200 hours of operation. All pUton rings were free, oad oil-ring slots were open. Main And^ connecting-rod bearings were.In first-dais condition, and not one had to bo replaced. There were no hord, gummy carbon deposits, ft* porfoct condition of Ohio oaglne Is typical of the condition of nechlnei protected by Sunvis Oils. Sunvii Oils ore high-viscosity-index lubricants, many of which ore speefatfy fortified to resist oxidation. Their obiliw to stand up on'lough (obs fs helping many manufacturers to keep Monti running unoolMy and to .produce more for less. j%0 note Svnvli Olio were developed to stand up under high speeds, . heavy loads, and continuous operation even under variable temperature CBftdilfoni. Their long fife and stafaffify have been "Job Proved" in steam hubbies, elr compressors, diesels, and other kinds of machines. For full Mfermoiton colt your neorest Sun office, or write Deportment P-6. <VN OU COMPAHV > Philadelphia 3, Pa. taoloi Sim Ol Cowpcay, Ui--lwMN n4 MmrwI pris>(!D(iis < .1 i i-