Month Archive November 2013

Oviedo University

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Years later Granellwould say: “The investigation on any significant logic in any methodology. the “logic”, was a first step, of course, crucially, for my future musings, which were human culminating in the neighborhood, subtitles: Substantiation of Etiological. “Granell Manuel Muniz was born in Oviedo on June 18, 1906 and died in Caracas on November 13, 1993. He began his studies at the Faculty of Oviedo, for then, in 1925, studies at the School Superior de Architectural de Madrid. Fail in the exams and are attracted by philosophy. Advised by his father studied law at Oviedo University and obtained his doctorate in 1929, when he traveled to Paris and its passage through Hendaye, visited Unamuno, exiled by the dictatorship of Primo de Rivera. ” The following year he began his studies at the Faculty of Arts at the University of Madrid, where his teachers included Garcia Morente, Ortega y Gasset and Jose Gaos, in 1936, obtained a degree. Collaborated in the Revista de Occidente.

In January 1937 he was professor at the Institute of Elche, in the same year he married Pilar Gaos. After the war provoked by the military uprising of General Franco launched his exile material. “In January 1939 a ” told us Granell-crossed the Pyrenees on foot by way of the Muga called on the very day that the rest of the Army of the East and under the observation of the aircraft Franco. In Saint-Laurent, the first French village I waited for my wife, accompanied by her parents, who had crossed the border on foot two days earlier.

Flue Stainless Steel

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Chimney – a vertical pipe or conduit of rectangular or circular cross section to produce thrust, and the flue gases from the heat generator (boiler, furnace) and chimney up into the atmosphere. Chimney – a pipeline or canal to flue gases from the boiler to the chimney or out through the wall of the building. Stainless steel flues – recently the most common solution for the flue gases, and it is no accident they are durable, Acid-proof, leak-proof and less labor-intensive to install than other chimneys. This article will address the main aspects of the choice of stainless steel flues for heating appliances. Ovens and stoves fireplaces bath and stoves for saunas, ‘classical’ and ‘cluster’ fireplaces, gas and diesel boilers – are all space heaters. In fact, each of which requires its “own” the chimney, ie chimney, focused on a specific heating device. That’s because stainless steel is different in their chemical composition, from which it is defined and its heat resistance and resistance to corrosion. Corrosion resistance – this is not the latter is stainless steel, because of increased efficiency of heating appliances, the chimney is excessive kondensatoobrazovanie.

Due to the fact that modern space heaters give maximum heat produced, temperature of exhaust gases in the chimney is not high enough because of what condensation. Just one of the reasons for its formation is the fickleness of the heating appliance (stove, fireplace). Because cooling of the flue leads to . Reduce the allocation of the condensate in such a case may increase heat-insulating layer between the outer and inner loops of pipes. By itself, the condensate is not terrible, but unfortunately, he interacts with the smoke and soot.

As a result of this interaction is formed by several kinds of acidic compounds, which corrodes stainless steel. With regard to heat insulation between the circuits of pipes, it should be: non-flammable, are not destroyed by heat or other factors that do not emit harmful substances. Its thickness depends on: flue gas temperature, outdoor temperature and other factors which provide safe use of the chimney. Types of chimneys. At the moment there are three main types of stainless steel flues: single-circuit, dual and coaxial. Single-loop (single wall) chimney used for indoor installation of the building and as a liner in brick chimneys. Dual (double-walled, insulated, sandwich), the chimney is used to set both indoors and outdoors. Stainless steel flues can have both vertical sections and inclined, and even horizontal. For this purpose a sufficiently large number of items, such as: tees, elbows, condensate trap, plugs, flanges, pipes, gates, baffles, umbrellas, headroom, etc. The choice depends on the chimney: the chimney installation option (external or internal placement), building construction, installation place the device in the building, the most radiator.

Main Reactions

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For manual arc welding electrodes with a thick layer covering the chemical reactions between metal arc gases and slag flow at 2100-2300 C in a time of transition drops of molten metal through the electrode and cover arc gap. Further physical and chemical processes occur in the weld pool. The main chemical reaction during welding under flux occur only under a layer of molten flux in the welding bath. Consider key reaction in the weld zone of steel, as the most popular metal that is to be welded. Oxidation. In the area of welding, oxygen is the most harmful impurity, so as to oxidize the elements that are part of the metal seam, and degrades its quality, forming chemical compounds – oxides. Oxidation of the elements, usually occurs due to oxygen contained in the slag and gas welding zone.

Oxidation to a lesser extent may be due to oxygen surface base metal oxides (rust, scale). If you accidentally drop increasing the arc length of the electrode metal can be oxidized by oxygen in ambient air. The oxidation of initially formed ferrous oxide, which in the future under certain conditions (the ratio of oxygen and iron in the weld pool, temperature) can move into mixed oxide and iron oxide. During the welding process in the oxidation of iron main importance of iron oxide, as soon as it is able to dissolve in the liquid metal. When the oxygen content in the steel reaches 0,035%, from the solution begins to stand out excess oxygen to form iron oxide and located between the grains of the metal. Chemical reactions in the welding area are not up to the end and to a certain equilibrium between the reaction products and starting materials. The equilibrium state is characterized by simultaneous presence in the reaction zone as a free metal and its oxide at the designated ratios. The equilibrium state depends primarily on the concentration of the reactants in the reaction zone pressure and temperature.

The equilibrium state is determined by the equilibrium constant. Concentrations of the reactants determine only the direction of the reaction. The possibility of this reaction is due to chemical affinity of participating agents, in this case, the affinity for oxygen. In the presence of a base metal multiple items, they begin to oxidize all the time, but those elements whose affinity for oxygen at a given temperature greater than would be oxidized intensively and thoroughly. In the first place when welding steel oxidized iron, which is the main component. Other components are oxidized more rapidly than larger chemical affinity this component with oxygen. By reducing the degree of chemical affinity with oxygen, the components can be placed in the following order: aluminum, titanium, silicon, manganese, chromium, molybdenum, iron, nickel, copper. Carbon in increasing the temperature enhances the activity of oxygen and at 1700 C exceeds its activity titanium, and at 2100 C, aluminum. With decreasing in the reaction zone, the concentration of the components that have high affinity for oxygen, the rate of oxidation decreases. Appropriately increasing the rate of oxidation of other elements with lower affinity to oxygen, which begin to burn more intensely as long as their concentration is not drops to an equilibrium and will not end the oxidation. This process of successive increases the rate of oxidation of individual elements extending to as long as the concentration of all elements will not match equilibrium, after which the oxidation of the metal in the weld pool to an end.

Chinese Pyrotechnics

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Every year we celebrate one of the largest and most beautiful festivals in the night sky kotorgo lit with colored lights and fireworks, and the echo of explosions and popping pierce the entire city. Surely most people perceive the new Year of the most interesting, enchanting, funny and massive celebration. This is the time we spend in the company of his best friends, relatives and friends. And directly to them, as well as many strangers we can demonstrate all his inventiveness, original ideas and professionalism, to try himself as an amateur pyrotechnics, give yourself and others pleasure and delight in the contemplation of his own made pyrotechnics and fireworks. This passion will allow you to greatly embellish the already fun event.

It is advisable to follow all the traditions of this historic mark the celebration and not limit itself just take a large amount of alcohol that night. Producing their own variety of explosives and devices, so you develop your technical and creative skills. This brings many times more pleasure than to give a fairly limited resources on the Chinese factory, sometimes not satisfied with the result and quality, pyrotechnics, fireworks and firecrackers weak. Also, mastering, and gradually expanding their knowledge of science relating to a bomb, fireworks, smoke bombs, vzryvpaketov, you get a chance to feel the master of the explosion and fire. Looking at our site, you will learn about the many recipes for making pyrotechnic devices and accessories, allowing us to set goals that you previously seemed unattainable. You also get acquainted with the special devices and devices that enable significantly reduce the risk of burns and injuries as a result of neglect of safety. Controlling the fire and driving the explosion of pyrotechnics, can perform various tasks, ranging from the transfiguration rather boring and banal interview with a girl, has made a heart beating a fountain of sparks, ending with the implementation of hard work to demolish the walls and the excavated soil. Of course such an occupation is unsafe, having risk life and health, so work on making homemade fireworks are responsible people are always strictly adhere to safety rules both general and for each individual case. This is a significant risk, and to a very long time to get the adrenaline and enjoy their work, you need priderzhivatsya certain rules. It is important a great responsibility and tolerance, to give myself a full report on its actions, the removal of all alleged and potential negative factors that bring an already dangerous occupation heightened risks. All this is constantly kept in the attention and fixed, but the ultimate goal is aimed at bringing the result pleasure in the creation and supervision in action pyrotechnics and fireworks made hard work with their own hands.

Work After Vacation

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Since the Christmas holidays we have, as elsewhere in the corporate world, a short vacation, people are trying to relax on the full program. So here it is worth recalling that there is such thing as a 'dootpusknoy' and 'Posleotpusknoy' syndromes. So, a characteristic feature of 'dootpusknogo' syndrome is that the performance of a man two weeks before the holiday is 3 times greater than the same average annual performance. MacDowell Colony may help you with your research. Following the same leave or extended holidays, and it should understand and take account of a top manager in the planning of work for eight days is not worth loading the hard work of subordinates. This so-called 'week of abstinence. " Since returning from holiday in people heart throbs of flirting, they are under the hypnotic influence of mountain or sea views. Especially in the first two days should be allowed to swing. Colleagues want to communicate among themselves, show pictures.

And the boss should not disturb them. After all, emotion just need to throw out. And already after two days, I advise to begin career with the most vile and difficult. And on the eighth day specialist has a better load the full program. As for employees, they would, I advised for a period of adjusting to work after long holidays as far as possible eliminate irritants that while on vacation relaxes. For example, television, internet. A week later a man enters into a rhythm.