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Networks of sewage system.
Networks of sewage system. SPECIFICATIONS OF PIPE FOR SEWAGE SYSTEMS. The pipes
used for the construction of sewage systems will fulfill the specified thing in
the manual of Norms for Design of Sewage system, or in his defect they will
fulfill norms ICONTEC or norms ASTM. The Inspector will be able to order the
tests that he considers advisable for the pipes and he will reject those that
are defective. The costs as much of the tests as of the failed materials, will
be of account of the Contractor and they will be considered including in the
price of this item. The precautions necessary will be taken to prevent damages
to the pipes during their transport and unloads. In the work the cracked or
defective pipes will not be able to be used, to criterion of the Interventoría;
these will be marked and retired of the lot. Pipes of the type of flexible union
will be used. Emphasis in which the specifications of the pipes of concrete, PVC
or stoneware, will be fitted to norms ICONTEC and/or ASTM and therefore the
tubes will have to be, at the time of their use becomes, labeled with legible
marks that indicate their origin (factory), class of tube, diameter, date of
manufacture and resistance.
Metallurgy. Alloys. By alloy the intimate union of in homogenous mixtures
is understood two more metal or. It is very rare to find alloys to the natural
state; one obtains them by fusion, by means of the increase of the temperature,
to the solid state. When the liquid state takes part mercury has left, in which
case amalgam is denominated. When it is obtained a well-defined homogenous alloy
and is denominated aesthetic. The alloys intend to modify in a certain sense the
conditions of metals, being treated for improving under the utilitarian point of
view, or its aspect or its mechanical resistance. But the number of alloys used
in construction is great, and some of them, like the bronze and the brass, date
from very old. The alloys are sometimes true chemical combinations, but in most
of the cases they are simply quite homogenous mixtures, as it can be verified
with the microscopic examination. Also it is called alloys to the combinations
of metals with nonmetals. When alloying itself a metal with another one, is
affected the point of fusion of each one of them. Although the proportion is 50%
of each metal, rare time is the one that can mathematically calculate the point
of fusion of the alloy between copper (fusion point 1088ºC) and the nickel
(fusion point 1454ºC), whose alloy to 50% is with a point of fusion next to the
average those two Arithmetic of temperature. |
