This paper evaluates the added resistance of a torpedo shape AUV, moving inside a water pipeline, due to wall effects within the tube. Today, there are long length pipelines of water or petroleum that need to regular inspection. Early detection of failure will help to prevent breakdown and avoid the huge cost of an accident. As pipelines are enclosed environments and difficult to access, pipeli...

In this study, a total of 6 different composites were obtained by adding 5%, 10% and 15% chopped aramid fiber reinforcement in mm dimensions to each the polypropylene polyethylene matrix elements under same production method conditions. The materials mixed using extrusion then formed into plates press molding technique. Tensile charpy tests these performed their mechanical properties examined. ...

The Pipes-and-Filters design pattern is a well-known pattern to organize and execute components with sequential dependencies. The pattern is therefore often used to perform several tasks consecutively on large data streams, e.g., during image processing or dynamic analyses. In contrast to the pattern’s familiarity and application, almost each common programming language lacks of flexible, featu...

Natural soil pipes are common and significant in upland blanket peat catchments yet there are major problems in finding and defining the subsurface pipe networks. This is particularly important because pipeflow can contribute a large proportion of runoff to the river systems in these upland environments and may significantly influence catchment sediment and solute yields. Traditional methods su...

corrosion of water and gas pipes is not desirable from the view point of health, economy and nuisances. there are many factors in soil which attack the metal pipes for corrosion. (steel, cast, iron and like). that is why the designer of metal pipes for conveyance of metal pipes for conveyance of water and gas should be aware of these factors and pay nutmost care in selection of pipes and protec...

Abstract Aiming to further plastics recycling via rotational moulding processing, blends of virgin and recycled polyethylene sourced from post-consumer were developed. Three different kinds high density – bottles, pipes mixed household waste compounded with medium in an extruder. The ideal amount recyclate was chosen based upon the impact resistance contents (25, 50 75%) plastic 50/50 blend fou...

Deep-water flexible composite pipes have been widely employed in the domain of deep-water oil and gas transportation, high-density polyethylene (HDPE) is used to seal inner sheath internal media containing H2S CH4, due its favorable barrier properties mechanical properties. The morphological evolution HDPE during extrusion process exerts a direct impact on material’s grand canonical Monte Carlo...

Over 124,300 heat pipes were installed in vertical support members on the Trans Alaska Pipeline System. Infrared surveys in the early 1980s revealed cold topping on some of these heat pipes. The cold topping was due to an accumulation of non-condensable gases, a by-product of corrosion or chemical dissociation of anhydrous ammonia. In 2000, Alyeska Pipeline Service Company undertook an experime...

Structural deterioration of drainage pipes has been a major concern for asset managers in maintaining the required performance of the urban drainage systems. Structural deterioration is the reduction of physical integrity, which can be characterized through structural defects such as cracks and fractures that are identified through condition assessment. Due to limited budget and the massive num...

Steel pipes with circular cross-sections are usually used in cooling panels of electric arc furnaces. In the present study pipes with square cross-sections under equivalent conditions were used to obtain more information on the possibility of increasing the heat transfer and cooling efficiency. The results showed increased efficiency of the square pipe compared to the circular cross-section pip...