This paper presents a numerical investigation of two horizontally mounted four-lobed swirl pipes in terms of swirl induction effectiveness into flows passing through them. The swirl flows induced by the two swirl pipes have the potential to improve the efficiency of Clean-In-Place procedures in a closed processing system by local intensification of hydrodynamic impact on the internal pipe surfa...

Failures in cast iron water mains are more complex and diverse than is widely understood in the industry. This paper discusses the modes and causes of pipe failures that have been encountered during a three year investigation by the National Research Council Canada. In addition to corrosion, manufacturing defects, human error and unexpected levels of pipe loading all play a role in the large nu...

Due to the periodic movement of the piston in the reciprocating pump, the fluid will cause 8 pressure pulsation, and the vibration of the pipeline will lead to instrument distortion, pipe failure 9 and equipment damage. Therefore, it is necessary to study the vibration phenomena of the 10 reciprocating pump pipeline based on the pressure pulsation theory. This paper starts from the 11 reciproca...

Abstract Failure caused by stress corrosion cracking (SCC) is inevitable during the long-term service of nuclear power pipe welds. This mainly due to propagation microcracks in deposited metal, which seriously affects operation safety pressure pipes. Overlay welding practical for repair welding, can introduce compressive residual inside weld seam. In this work, a diagonal T-pipe joint was fabri...

The rupture analysis of lubricating oil pipe has been conducted through chemical composition analysis, metallographic and fracture analysis. results show that there are machining defects bidirectional vibration at the joint pipe, which leads to fatigue fracture.

Z. Burzić, Military Technical Institute, Belgrade, Serbia. Dž. Gačo, F. Islamović, E. Bajramović, Technical faculty, University of Bihac,Bihac, Bosnia and Herzegovina. M. Burzić, University of Belgrade, I.C. Faculty of Mechanical Engineering, Belgrade, Serbia. In present paper, experimental investigations have included the eff ect of exploitation conditions (exploitation time and temperature) o...

The authors have been developing a pipe bender which fabricates pipes of three-dimensional complex shapes from straight pipes based on the penetration bending method. This bender is composed of a movable die supported by a drive mechanism, a fixed die and a pipe feeder. A 3-RPSR parallel mechanism was employed as the movable-die drive mechanism, and its kinematic design was figured out under th...

Three-dimensional finite element modeling of residual stresses in a girth-welded pipe is presented in this paper, with an emphasis on modeling procedures for the global residual stress characteristics. The shell element model with a heat source moving along the circumferential joint is demonstrated to be cost effective and capable of predicting the global residual stress features. Transient res...