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Archive for July, 2012

Pipeline Parts

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Holes in the pipes with a diameter up to 40 mm for welding nozzles must be performed by drilling, milling or cutting down on the press. The hole diameter should be equal to the inner diameter of the pipe with an allowable deviation Niemi 1 mm. Galvanized steel pipes, parts and components are assembled in the screw with fittings of ductile iron, the nut and flange (with valves and equipment). Galvanized steel pipes with a diameter of 50 mm nominal bore and over are allowed to adopt a compound welding. Compound non-galvanized steel pipes, parts and assemblies of them should be carried out on welded-ke, thread, nut and flange (with valves and equipment). For threaded joints of steel pipes should be used cylindrical pipe thread that runs according to gost 6357 (accuracy class B) thumb on the light tubes and thread – in ordinary and reinforced. Turns pipes in heating systems, gas and heating fol-em perform by bending pipes or the use of seamless weld elbows carbon steel according to gost 17375.

The radius of bending pipes nominal bore diameter to 40 mm inclusive. must be at least 2.5 Dn, and with a diameter of 50 mm nominal bore and more – not less than 3.5 pipe Dn. Do not use billets that are “corrugated” formed by the bending of tubes. In systems hot and cold water piping bends and junctions should be done by setting triangles, tees, crosses, gost 8943 and gost 8944, on-water treatment or bending pipes.

Written by Minna

July 25th, 2012 at 5:35 pm

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Rio De Janeiro

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Ministrante of the Workshop Construction of the Ball of Soccer and Polyhedrons 6. Consideraes Final the process of education and developed learning was regulated on the basis of the comments of the reactions of the pupils. Through these reactions we made some conjecturas that had deserved our attention. Amongst these, we detach: The construction of the soccer ball if presents as a strong link that approaches the reality of the pupil of the mathematical contents; The conceptual field? Polyhedrons of Plato? it is presented as adequate to work geometry in Average Ensino; The tasks that involved organization, systematization and formalizao of mathematical contents help in the accomplishment of tasks interdisciplinares; The involved participants in this experience had evolved throughout the passage (action of formation, intervention critical reflection of the results), modifying its attitude in relation to the paper of the mathematics.

The mathematics is an area of knowledge with many alternatives of work, and is always present in the daily one. The development of this article helped to think it us with clarity and to reason better, therefore it was possible to organize the education process, transforming the learning of Mathematics into a pleasant, interesting and challenging study, developing the logical reasoning, the creativity and stimulating the independent thought and the creativity participant them of our workshop. We affirm that we reach our objectives, therefore was possible to work of diversified and attractive form, combining geometry? polyhedrons and ball of soccer. With the activities proposals, the pupils had interacted actively during the episodes of education happened in the Laboratory of Education of the Mathematics, constructing the knowledge on the studied subjects.

Written by Minna

July 1st, 2012 at 12:18 am

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