Transactions Of The American Society Of Heating And Ventilating Engineers Vol 13 PDF Download

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1916 edition. Excerpt: ...custom of the writer to keep several service tests under way continuously for the past few years. In every case the co-operation of some local engineer or organization is sought under whose immediate direction the test is conducted. One of the most recent to be completed may be described as an example of the method pursued in conducting such tests. This test was made in the Pennsylvania Building, Philadelphia, Pa., by Mr. Munsey, engineer. Four standard grades of pipe of FIG. 2. SECTIONS OF SPRINKLER PIPES AFTER YEARS OF SERVICE. well known manufacture were selected and four pieces of each taken at random and coupled together alternately so that the hot water passed through each sample at the same temperature. Details Of Tests Date installed--October 27. 1913. Date removed--November 20, 1915. Location--Hot water return line, Pennsylvania Building, Philadelphia. Temperature of water--175 degrees Fahrenheit average. Amount of water--5,000 gallons per day for GOO days. Method of installation--In form of box coil. A resume of a large number of these service tests compiled from several sources is given in Table 2. Inasmuch as both materials have been found to fail in about the same time under the same conditions, and as both have shown practically no deterioration after many years under other conditions, it would seem that with a correct understanding of the fundamental causes of corrosion a practical solution of this problem should be possible. The author has devoted a considerable portion of his time for the past ten years to a study of the factors governing corrosion of pipe in service, and is writing this paper in order to open up a more general discussion of preventative measures. The inside of pipe is subject to peculiar conditions not...