This paper presents a methodology to quantify and to locate leaks. The original contribution is the use of a tool based on the TrustRank algorithm for the selection of nodes for pressure monitoring. The results from these methodologies presented here are: (I) A sensitivity analysis of the number of pressure transducers on the quality of the final solution; (II) A reduction of the number of pipe...

This paper presents the modelling of stress strain response of glass fibre reinforced epoxy (GRE) composite pipes subjected to multiaxial loadings at room temperature (RT). This particular modelling work was developed to predict the non-linear stress strain response caused by the fatigue cyclic and static loading in the multiaxial ultimate elastic wall stress (UEWS) tests by considering the eff...

Pipes (2003) has proposed a checklist for law enforcement to use in identifying possible members of sleeper cells. The purpose of this research was to evaluate Pipes’ checklist through the judgment of Muslim “insiders.” Thirty-three Muslim insiders responded to Pipes’ checklist by indicating the degree of concern that they believed each item should trigger about a possible sleeper. The sample o...

By the late 1950s, the Soviet Union had acquired a strong position as a world oil exporter, thanks to major discoveries in the Ural-Volga area. In order to transport their oil to strategic areas within the Union and to Europe, the Soviets devised a project to build a colossal pipeline system. This plan caused anxiety at NATO since Russian oil could be wielded as a weapon to weaken the West both...

Incrustations and other biological growths in water mains and distribution pipes cause considerable difficulties in water engineering. The control of such obstructions in the pipes, in most cases, largely depends upon the character and composition of the water and the nature of the pipe material. A few years ago some studies were carried out at Bangalore on the tubercular incrustations in water...

In this paper we derive two rigorous properties of residence-time distributions for flows in pipes and mixers motivated by computational results of Khakhar et al. [Chem. Eng. Sci. 42, 2909 (1987)], using some concepts from ergodic theory. First, a curious similarity between the isoresidence-time plots and Poincare maps of the flow observed in Khakhar et al. is resolved. It is shown that in long...

A method of calculating the coupling impedance and the wake function of resistive beam pipes is given including the short-range behavior of the wake. The pipe is uniform longitudinally but the cross section is arbitrary. The beam is assumed to be ultra-relativistic. A simple computer code is written using the boundary element method. Some results for elliptic, rectangular and hyperbolic pipes a...

Autonomous vehicles will be used without a driver. This will make them less inspected because the driver often listens to the engine and its sounds; however, a passenger in an autonomous vehicle will do other things and even sleep, so there will be no effective inspection on the engine and particularly on the pipes system. This paper suggests a technique to alert about worn out pipes before the...

According to flexibility of pneumatic conveying systems with respect to other types of transmission systems, this system has wide application in industry and agriculture processes. One important application of this system is in the loading and unloading tankers and powdery bulk materials such as trucks carrying cement, plaster and sand. Conveying efficiency is associated with pressure, which in...

In most coal-fired power plants, pulverized coal and primary air flow from the pulverizers through a network of pipes to the burners. For proper operation of the boiler, all the coal pipes connected to any one of the pulverizers should carry the same coal flow rates and the same flow rates of primary air. Instrumentation is available commercially for making on-line measurements of coal flow rat...