The number of general-purpose pipelines in the modern world peaked at the beginning of the current millennium, but the subsequent decline had virtually no impact on market demand for the primary materials used in their construction from scratch...
Reliable pipeline systems allow for the pumping of enormous volumes of liquids and gases from their intake points to intermediate processing points or end users, directly across rough terrain in any weather, regardless of climate zone or time of year...
Wood, once so popular in the last century, has almost completely lost its position as a structural material. It has been replaced by various types of plastic profiles and rolled products produced by ferrous and non-ferrous metallurgy companies...
When dismantling old stoves in clay-plastered rural huts, you can come across grates that have been in use for half a century, originally centimeters thick. Upon closer inspection, you'll notice they're almost completely worn down, splitting into two separate pieces. This isn't caused by mechanical abrasion, but simply by contact with hot coals during the combustion of various fuels in the firebox..
In accordance with the operating principle conceived by the developers, many mechanisms incorporate elements that perform various movements during operation. The simplest to consider and most common in practice is the rotation of cylindrical shafts around a central axis, which must rotate at a predetermined angular frequency without changing their overall spatial orientation...
The performance of pipeline transport systems is directly dependent on the pressure developed by the pumps. The higher the pressure, the greater the throughput and efficiency. Therefore, increasing this value can significantly reduce energy costs for pumping various liquids and gases over short and long distances, thereby maximizing the economic benefits of pipeline operation. On the other hand, a..
Assembly and disassembly are integral operations in the production, maintenance, and repair of all mechanisms consisting of two or more parts. The number of such procedures performed annually worldwide reaches tens, and by some estimates, hundreds of billions, so the importance of improving them is obvious. Even reducing each of them by just one second allows for colossal savings in labor hours sp..
The vast majority of metal structures are assembled from dozens or even hundreds of individual elements, the quality of the resulting framework being determined by the method of joining them together. For individual structures, arc welding or rivets, bolts, and nuts inserted into pre-drilled holes are most often used. The first method yields good results when connecting the main load-bearing eleme..
In the production of various structural materials, standards are used that specify permissible deviations from the ideal dimensions and geometric shapes. The higher the precision of a product, the more complex and expensive the manufacturing methods used to produce it. However, they allow for greater efficiency in solving complex practical problems...
Threaded connections are now widely used in the assembly of various machines and mechanisms, as they allow for the secure fixation of individual parts within a complex structure. Another factor in favor of this approach is the relative ease of assembly operations during construction and disassembly during scheduled maintenance or repairs following the failure of individual components...
In the national economy, there are many tasks associated with the need to divide a solid object into a specific number of pieces. For example, consider the crushing of reinforced concrete structures or brick walls during the complete or partial dismantling of buildings for demolition or reconstruction, the removal of a section of asphalt road for repairing underground utility lines laid across it,..
Modern machinery and mechanisms contain numerous rotating parts, resulting in a strong market demand for their manufacturing materials. When selecting materials from those provided by metallurgical plants, it is necessary to consider numerous factors affecting the overall operation of the system. Therefore, selection is one of the most important engineering tasks and often determines both the reli..
Chromium and nickel, alloying elements introduced into stainless steel during the smelting process, were discovered and studied by chemists along with other elements of the periodic table over the past two or three centuries, but they had never previously been used by humanity for practical purposes. For this reason, archaeological excavations have failed to find traces of ancient civilizations, b..
When creating various equipment and piping systems, it's important to consider ways to seal the internal space to prevent the release of circulating liquids and gases into the environment. Failure to do so will result in the working fluid escaping as pressure increases, leading to unnecessary economic losses due to both the excess consumption of the product itself and the energy expended in pumpin..
Many types of shut-off and control valves feature a reciprocating element whose axial movement in either direction is achieved by shifting along the threads of the supporting element during clockwise or counterclockwise rotation. In gate valves and globe valves, the stem rotates within a threaded hole in the body, moving like a bolt relative to a nut that remains within its own plane. This allows ..
In the electrical industry, the most important characteristic for assessing the suitability of a material for a given purpose is its resistivity, which reflects its ability to conduct electric current. Where current must be minimized, dielectrics with high insulating properties are used, and when obstacles to current flow must be eliminated, silver, copper, and aluminum, which have the highest ele..
Every year, industries across various sectors of the national economy produce a vast array of goods that require transportation from the manufacturer to retail outlets serving end consumers. Most of these goods also require temporary storage in specially equipped hangars and other types of buildings. Loading, unloading, and transporting are labor-intensive, requiring manual labor and considerable ..
In the mechanical engineering industry, the manufacturing process for many vehicle parts and various equipment includes turning to produce rotating bodies of various geometric shapes and sizes. Before subsequent milling, grooving, threading, and drilling operations, all of these bodies share a common characteristic: symmetry around the central axis. This ensures uniform mass distribution and smoot..
Medical research conducted over the past decades has revealed the mechanisms underlying the onset and development of many acute and chronic diseases. Many of these diseases were found to be caused not by biological factors related to heredity or environmental conditions, but by the effects of substances and microorganisms on the tissues of individual organs and the regulatory systems of ongoing bi..
Medical research conducted over the past decades has revealed numerous connections between substances of varying composition and biochemical processes occurring in the human body. It has been discovered that many acute and chronic diseases are caused by certain chemical compounds capable of triggering mechanisms that disrupt the normal energy balance in living cells, as well as influencing the inf..
Currently, the vast majority of food products come to store shelves in packaged form, and containers with lids of various volumes often serve as packaging. They can be made of glass, tin, high- and low-density polyethylene, have a variety of geometric shapes and colors, but in all this diversity, one common feature can be identified for all, namely, that a ring-shaped sealing gasket is always used..
In modern technology, there are practically no simple mechanisms left; each unit consists of dozens or even hundreds, and sometimes thousands of parts that differ in geometric shape, size and functional purpose. To assemble them into a single, well-coordinated system, fasteners are needed to fix their spatial position, as well as, if necessary, to ensure a hermetic division of space into several i..
Turning on lathes is one of the most popular technological methods for producing various parts for complex, multi-part mechanisms in mechanical engineering. To improve the quality characteristics and increase the production rate of all kinds of elements, it is necessary not only to optimize all the operations performed, including the selection of optimal rotation and feed modes, but also a reasona..
Pipeline transport currently covers more than half of the annual freight turnover in the economic activity of all countries on planet Earth. The total length of all sections of branched tree-like structures of pipelines of various diameters is enormous, so there is a steady demand for materials suitable for their construction and repair. Ukrainian metallurgical plants produce large tonnages for th..