THE EARLY HISTORY OF PVC PIPE By Robert Walker‚ P.E. Uni-Bell PVC Pipe Association (Published in Summer 1990 Edition of the Uni-Bell PVC Pipe News) “Many of you have expressed a curiosity about the historical development of PVC pipe. In response to your requests‚ we provide you with this brief early history of PVC pipe and fittings. PVC was discovered as early as 1835‚ but the first definite report of the polymerization of vinyl chloride did not come until about 35 years later. At that
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Introduction: In any pipe system there is going to be a loss of energy due to the effect of viscosity from a fluid acting upon the surface of the pipe‚ this is called Friction Loss. This type of lost depends on the shear stress due to the walls of the pipe and the fluid. It also depends in weather the fluid is laminar or turbulent. A major difference between these two flows is that due to a viscous layer created in turbulent flow the roughness of the pipe can be taken in account while in laminar
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dy CABERTO‚ GERLYN JOYCE 12-04-12 BS ACCOUNTING TECHNOLOGY I. Context/Background Ben Reed‚ twenty seven‚ graduated from the state university in June 1960 with a B.A. degree in psychology. Ben Reed was hired as assistant office manager at the Acme Medical Association‚ a group health insurance organization. Having a salary of $5000 per year‚ he was responsible for supervising approximately forty female office employees who performed sorting‚ totaling‚ and recording operations concerning
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The oak one day address the reed: "To you ungenerous indeed Has nature been‚ my humble friend‚ With weakness aye obliged to bend. The smallest bird that flits in air Is quite too much for you to bear; The slightest wind that wreathes the lake Your ever-trembling head does shake. The while‚ my towering form Dares with the mountain top The solar blaze to stop‚ And wrestle with the storm. What seems to you the blast of death‚ To me is but a zephyr’s breath. Beneath my branches
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of the army‚ failures of the Roman leaders and government‚ and the barbarian invasions slowly causing the Fall of the already weakening empire. The Barbarians caused the fall of Rome to a moderate extent because while on one hand social stratification had affected Rome with heavy taxation of the lower class leading to the allowance of the barbarian invasions which coincided with the fall of Rome‚ on the other hand‚ the barbarian attacks on Rome occurred only after the empire was left weak because
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Reed Supermarket was fighting to keep market share in Columbus‚ Ohio with a growing number of competitors. Currently holding 14% market share in 2010‚ their focus was to grab 16% in 2011 without expanding into new locations. Reed had to assess which business model could gain two percent market share by 2011. Reed had three options: a) continue with the model they have and hope customer loyalty will give them share; b) continue with the model they have but make some changes; or c) move to an every
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civilization to the Orient. The fact that Alexander’s army refused to cross into India meant the prevention of harmful religions such as Hinduism entering into a knowledge-rich Asia Minor‚ or a philosophy-defined Eastern Europe. In like manner‚ the barbarian invasions into the Western Roman Empire defined the history of Europe for centuries to come. And it was not one barbaric nation; several tribes appeared. The mixing of these barbaric tribes with advanced Roman thought resulted in military‚ cultural
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Pipe Friction Summary The purpose of this lab is to find the friction factor and Reynolds number for laminar and turbulent flow and also for values in the critical zone. Results were taken recorded and used to calculate the friction factor and Reynolds number. They were then compared with the Moody diagram. Aim This lab could be used in industry when dealing with a pipe line containing any type of liquid to calculate the Reynolds number and friction factor. It would also help in pipe
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be used derogatorily in another. Pagden never really gave a definition as to what a barbarian is. It is stated several times that the observers was definitely not barbarians due to the fact that they are civil and politic (Pagden 15). It is understood that the observers classified the group as barbarian due to the fact that they had to give a name to a group of people who are unknown to them. The term barbarian however started to be given to other groups that did not have the same characteristics
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the Rhine River‚ and occupying the area of Central Europe of what is today Germany‚ lived the tribes of the Germanic people. In Germania‚ the Roman historian Cornelius Tacitus gave an account of the lifestyles and organization of these peculiar barbarians. These descendants of modern Germans proved peculiar in that they adopted many qualities typical of barbaric cultures‚ yet they simultaneously practiced virtues more befitting of advanced civilizations‚ values more ethical than even the Roman empire
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