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§ March 29th, 2026 § Filed under General § Tagged promyshlennoct and equipment Comments Off on Eddy Current Testing
Value, features and advantages of eddy current testing. Eddy current method is universal, efficient and economical way of nondestructive testing. It has many advantages over other forms of ndt, not least among which is its exceptional sensitivity to microscopic defects, located directly on the surface or close to the surface controlled metal object. The choice of the eddy current method of control is caused by the following factors: high accuracy and repeatability of detection of defects and high speed control, minimum requirements for state surface, Ability to control over coverage; Ability to control objects with complex geometry, difficult access locations; Ability to control the water and the ability to distinguish between types of defects, lack of appropriate a contact protection, no need for consumables, the method is not harmful to health of the operator. Click Mark Fields to learn more. Application area of eddy current testing in the aviation and petroleum industries. The key point in aviation segment is security. Eddy current testing is used not only in service of air courts, but also at the stage of their production. Complex application of the eddy current method in conjunction with other methods of control reduces the risk of crashes. Charles Margulis : the source for more info.
Eddy current instruments are used in the aviation field for many procedures, inspection of aircraft. Control are the wings, wheels, components engines, fuselage, axles, rotors, mounting holes. In the oil and gas sector use of eddy current testing can ensure the efficiency and safety of industrial structures of the area. Regular inspections using eddy currents can reduce downtime and risk of accidents. You may find that Daryl Katz, Edmonton Alberta can contribute to your knowledge. Eddy current equipment used in the manufacture of onshore and offshore facilities for the control of welding defects – Such as burning and cracking. Eddy current testing is also used during the operation of onshore and offshore platforms, drilling rigs to conduct routine inspections of welded structures, fatigue detection cracks and other defects.
§ January 31st, 2026 § Filed under General § Tagged promyshlennoct and equipment Comments Off on Power Cables
At the present time to replace the power cable insulated with impregnated paper (BIP) and polyvinyl chloride (PVC) plastic comes with power cable xlpe insulation (XLPE). An example would be cable VVGng hp. In Therefore, most manufacturers of power cable master the production of this product. Let's look at the advantages and disadvantages of different types of insulation of power cable. Power cable to all the above insulating material has a fairly good dielectric characteristics. However, all these insulating materials are significantly different from each other.
This is due to their different chemical composition and properties. For example, pvc plastic, being a polar polymer, has lowered the dielectric characteristics as compared with non-polar polyethylene or impregnated paper, which leads to increased losses in the insulation. However, plasticized pvc – a material that is not flame retardant. Power cables with paper insulation must include in its design the metal shell to mechanically protect the insulation and prevent the radial penetration of water into the power cable. Power cables with paper insulation and lead sheath is suitable for installation in damp soils, and, if special protective integument, and under water. Power cable with xlpe insulation (XLPE) for the protection of the radial penetration of moisture requires a special metal layer of alumopolymer tape or aluminum or lead sheath.
Power cable with XLPE-insulated 10-35 kV in the present time in Russia decided to produce a single-conductor design. Power cable with xlpe insulation is designed for installation only in canals or ditches with the installation of additional protection against damage to the cable, since this design does not permit the use of steel protective covers on the cable. Power cable with paper insulation has one more advantage. Power cables with paper insulation is made with bronepokrovom steel tapes or wires that protect the cable from damage when installing or operating. In this case, power cable with paper insulation has a sector shaped conductors that can significantly reduce the size of the product, compared to cables having round conductors. At the same time the power cable with paper insulation has a significant drawback: the laying of cables on vertical routes and the large difference between levels of laying maslokanifolny composition impregnating the paper insulation, has a property drain, with paper insulation depleted and has a tendency to premature aging. To reduce this effect applies the power cable with non-slumping preservatives. Power cables with polymer insulation (XLPE) has no such drawback. One the most important characteristics of insulating materials – is permissible heating temperature of conductors – the maximum temperature at which the insulating material does not lose its properties over a long time. The higher the score, the higher the permissible load currents, which can be passed through a power cable for a long time. Long-term allowable heating temperature of XLPE-insulation is significantly higher than that of other materials used for insulation of power cables, as xlpe – thermoset material. In Russia, vvg copper cable with plastic insulation and the shell has been used for several years. Skeptics may say it's too short term to assess the reliability of cable products in comparison with traditionally used power cables with IL-insulated, which is used for more than a dozen years. However, it should be noted that overseas this experience is much longer. In conclusion, we say that the various cable designs have their advantages and disadvantages due to their design and material used for insulation. Therefore, when the use of any cables must be considered conditions of laying, operation and requirements for the reliability of cable lines.
§ November 11th, 2025 § Filed under General § Tagged promyshlennoct and equipment Comments Off on Machine Embroidery History
Recently, after the machine embroidery, hand sewing was almost ousted. The very first embroidery machine appeared in France back in 1821 Unfortunately, the name of the inventor of this creation is unknown to this day, as well as information about its mechanism. After five years Barthelemy Timon d’Amplepi invents a machine for the following machine embroidery, which again was not suitable for wide dissemination embroidery. Geylmana third machine was invented by the French exhibition in 1854, which caused general delight and inspire further inventors. Then, in the so-called car Geylmana fired several minor modifications. One of the inventions were made Barbeau Schmitz, despite the fact that the fundamental idea and the mechanism of the machine Geylmana remained the same. Of course, such a thing as machine embroidery can be applied not only to the particularly complex patterns. As a rule, modern embroidery machine is very handy for duplicating items, their accessibility and a wide distribution in the other case, the costs of the introduction of the new picture would be so great that it simply does not pay off.
Of course, many of us still prefer to hand sewing, finding it more beautiful and durable, highly artistic work of art. After all, imagination embroiders has tremendous scope and totally is not constrained by the narrow limits of machine production. At the end of the 80th of the 19 th century in Western Europe, especially France, was widely distributed embroidery using traditional Russian motives, with the cockerels, horses, and similar figures, embroidering with red, blue and yellow thread on white fabric. Clothes with embroidery can be often seen on the streets of Paris in those days, they used a special popular among young women and children. Given all the expressive means of machine embroidery as art can make masterpieces. So, should first identify the aesthetic properties of the material, iridescent sheen silk, smooth shimmer linen, shining gold, stones or sequins and fluffy and matt wool and similar materials.
§ May 24th, 2021 § Filed under General § Tagged promyshlennoct and equipment Comments Off on Powder Coating: The Quality Of The Highest Order
Powder coating – a modern technology to quickly and effectively inflict lasting coatings on various metal products, as well as other materials. Powder coating applied early in the second half of the xx century, and xxi, this technology came as a major, displacing liquid coating materials from nearly all industries. The key to success was the unique combination of the main positive qualities required of coloring materials. Powder coating has been the most economical method, has demonstrated exceptional friendliness to the environment and has achieved impressive results in strength and durability of coatings. How does powder coating achieves such results? Let's start with the economy. Conventional coating materials costs beyond the norm for two reasons: firstly, to make coverage firm should, on average, three coats of paint, and secondly, when working a large proportion of the materials simply lost – the waste reaches 20% or more. Powder coating uses a dry crumbly substance that is applied way of deposition.
Features of both the substance and the process eliminates the need for a coat of paint. A percentage of waste does not exceed 3-4%. This is due to the fact that the powder coating is carried out in sealed chambers equipped with recuperators. Last collect the particles remaining in the air and not fixed on the surface, and returns them to work. In addition, power consumption, which is essential equipment for powder coating, too low and allows you to significantly save money. Environmentally friendly – a trait powder painting purchased by the fact that for the preparation of paints do not need solvent. It was he "Guilty" of harmful fumes into the air. In addition, powder coating in a closed chamber prevents substances into the environment. As for durability, then powder coating is used to applying anti-vandal coatings, and is used for treatment of surfaces that are exposed to aggressive environment.
