Robotics is one of the fastest growing engineering fields of today. Robots are designed to remove the human factor from labour intensive or dangerous work and also to act in inaccessible environment. The use of robots is more common today than ever before and it is no longer exclusively used by the heavy production industries. The inspection of pipes may be relevant for improving security and e...

Pipelines are pressure vessels. Their enviable safety record compares weil with other transportation modes. Typical pipeline fatality rates are about 1% those of rail or air which are, in turn, about 1% of highway fatalities. Pipeline safety is first assured by rigorous inspection during pipe manufacture and line construction. All welds are inspected using radiography to detect voids and ultras...

Preliminary note The pipes and the pipe walls are of the utmost importance to all power plant facilities. Under exploitation, they are subjected to effects of aggressive media, high temperature corrosion and possible mechanical damage. Consequently, special attention is paid to the control of material properties during the power plant construction in order to minimize the risk of flaws or failu...

Managing pipe damaged by Stress Corrosion Cracking (SCC) has been a formidable challenge to the pipeline industry. The development of a practical solution for the measurement and evaluation of SCC has been marred by the complexity of crack shapes, their distribution within a crack colony, and the lack of non-destructive technology capable of reliably measuring the crack depths. Laser ultrasonic...

Underground oil pipelines are made of pressurized pipes, and when damage occurs, the consequences can be disastrous. Pipeline accidents caused by stress can be attributed to material corrosion, impractical design, manufacturing defect, environmental damage, and man-made destruction. In this study, by utilizing the stress analysis software CAESAR II, the stress of pipelines in high and steep slo...

This paper presents a newly developed high temperature ultrasonic sensor and its application to in situ observation of aluminum (Al) alloy during solidification and melting in temperature up to 800C. The ultrasonic sensor mainly consists of a conventional piezoelectric transducer, a titanium buffer rod as an acoustic waveguide and an air cooling pipe. The length is approximately 300 mm. This ul...

To investigate the tube thinning of gas wells in northwestern oilfield, failed tubing was analyzed by using material property testing, SEM, EDS, and XRD. A novel model that specific to service life terms wall thickness established. The is based on circumferential stress tubing. safety factor against internal pressure corrosion rate are considered model. Our results make clear chemical compositi...

Within the Fives Group, Fives Stein, Fives DMS and Fives Bronx design and supply a wide range of production, transformation and treatment lines for carbon, stainless and silicon steel. From pickling and annealing lines to the continuous galvanizing line, from rolling mills to tube and pipe mills, our teams will offer you their expertise and the best available technologies to achieve the highest...

An optimized dictionary of matching pursuit (MP) is designed and combined with the ultrasonic guided wave for characterizing pipeline defect, which consequently achieves good performance in estimating the axial length of a defect. In the research field of guided wave based pipeline defect inspection, quantitative characterization on the detected defect remains as an unsolved research task and i...

This paper investigates the inhibition performance of a typical imidazoline based inhibitor under multiphase flow. Electrochemical impedance spectroscopy (EIS) measurements were carried out in a 101.6 mm I. D.,15 m long acrylic flow loop using ASTM substitute saltwater and carbon dioxide gas. This flow loop system can generate slug flow, fill pipe flow and other multiphase flow patterns. Effect...