Tag promyshlennoct and equipment

Technical Documentation

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First, the value of sound pressure affect the distance to the equipment and the presence of reflecting surfaces. In addition, of great importance and location of the sound level meter, with which the measurements are made. For example, in the open space sound pressure level is reduced by about 6 dB for each doubling the distance from the source. The room is a similar reduction in sound pressure is already 3-4 dB. Permissible sound pressure levels for the different rooms are defined by sanitary norms. re.

In Technical Documentation noise characteristics of the equipment in accordance with standard cagi pneurop, should be presented in the form of sound pressure level in dB (A) measured at 1 m from the source (compressor). Follow others, such as Clayton Morris, and add to your knowledge base. Speaking of compressors boge Kompressoren, note the following: among the smallest screw compressors, the sound pressure level at 1 m have compact compressors C – 59 dB (A) and cl – 59 dB (A), and the largest industrial compressors-S Series – 68-86 dB (A). Among the lowest rates of reciprocating compressors in series compressors srdl – 66 dB (A), and highest in compressors RH-85dB (A). As already mentioned, the power of sound decreases with distance from the noise source. This decrease can be calculated by a formula relating the power level and sound pressure level. For a given level of sound power (Lw), sound pressure level (Lp) at a distance r from the sound source is determined by the formula: Lp = Lw – lg r – 11 (dB). For example, if the power of the sound installation is 73 dB and is necessary to determine the sound pressure level at a distance of 10m, it will be: Lp = Lw – lg r – 11 = 73 – lg 10 – 11 = 61 dB.

Rolled Metal And Its Application

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In the modern world very widely used metal products in all spheres of life: engineering and construction, interior design and furniture of various steel structures and frameworks in the chemical and food industries. Rolled metal products are divided into: * Rolled. It is: o circle; o square; o Allen; o fittings; o band; o rod. Scope of long products is huge. It is used in construction and in all industries. Fittings used for building structures made of concrete (reinforced concrete). Circle and square is used as a billet for shapes and sections.

And also for the manufacture of parts for machines – different shafts, rods, bushings, axle and much more. As the circle is used as a billet for subsequent production of pipes. Hexagon used for the manufacture of various fasteners (bolts, nuts, etc.), machine parts and mechanisms. There is also a special kind of drilling hollow hexagons, which is used in the petroleum industry. The band used to produce steel, cutting tools and bent structures (channels, angles). Wire rod is used to followed by wire drawing, manufacture valves for concrete or springs. * Tube rental.

This includes all the variety of pipes (seamless and welded, round, shaped and variable size cross section of steel and cast iron, pvc and non-ferrous metals). Scope Tube rental is also very wide. That pipeline, oil and gas pipelines that serve to transport gases and liquids. This variety of applications in construction. Pipe, with a slight loss in strength, is much easier and cheaper similar-sized solid bars. Just pipes are used for installation of various steel structures. * Plates. o Hot. To obtain hot-rolled sheet at a rolling mill roll out a red-hot steel ingot. Basically this type of sheet used in construction. o cold. Applied in the construction and engineering. For example, the car body is made of cold rolled steel. o profiled. Used in construction as a material for the construction of fences, walls, roofs. * Structural shapes: o beam; o channel; o corner. Beam used in mainly in the construction of various structures. As an overlap in the construction of buildings, supporting structures, bridges, hanging rails and other channels – this is a product of the metal profile in the section which is U-shaped. They are produced primarily by hot rolling mills for long. Depending on the form and method of treatment they are divided into: * Hot-rolled Steel channels, Steel channels * special * channel bars bent steel equal-* channel bars bent steel unequal. Used mainly in construction and installation of metallic structures, slabs between floors. Area, again, is involved mainly in construction. For example, is used to produce various welded frames and skeletons. The modern world is difficult to imagine without the metal in all its various forms and images. Production technology of rolled improving day by day, which leads to increased product quality – durability and strength. Metal acquires special properties – resistance to pressure, aggressive media and temperatures, etc. The Russian metal products can satisfy any, even the most demanding quality requirements.