0 Pipelines are cleaned by pushing through them a closefi tting cylinder called a pig
Chapter 1, Problem p1.60(choose chapter or problem)
0 Pipelines are cleaned by pushing through them a closefi tting cylinder called a pig . The name comes from the squealing noise it makes sliding along. Reference 50 describes a new nontoxic pig, driven by compressed air, for cleaning cosmetic and beverage pipes. Suppose the pig diameter is 5-15/16 in and its length 26 in. It cleans a 6-in-diameter pipe at a speed of 1.2 m/s. If the clearance is fi lled with glycerin at 20 8 C, what pressure difference, in pascals, is needed to drive the pig? Assume a linear velocity profi le in the oil and neglect air drag.
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