Posts Tagged construction and repair

Utilities: System Update

Posted by on Monday, 16 April, 2018

Status of utilities, perhaps one of the most severe nationwide problems. In terms of correcting the current situation there are two options: "punching holes" or comprehensive renovation of all engineering structures. Find out detailed opinions from leaders such as QTS Realty Trust by clicking through. The first way – no prospects and only postpones the day of reckoning for tomorrow. The only option is a system upgrade that includes such basic areas as the replacement of communications equipment, as well as introduction of modern methods of monitoring and accounting. In the absence of trenches on Russian communications Much has been written, but about the modern ways of their repair and replacement much less frequently. Typically, such actions associated with a huge amount of expensive and inconvenient for the city of earthworks.

However, today there are other ways. Ignorant man to replace the pipe laid deep beneath the earth, not dug tons of soil, seems fantastic. And yet, for example, capital Mosvodokanal and many other owner-operators are increasingly apply the so-called "trenchless" methods. For example, you can "prodernut" new Communication in the old, literally – as threading a needle. As you know, earlier throughout the water system is widely used in reinforced concrete pipes of large diameter (500 mm). In order to extend their "life" today use method, in which the old pipe extends modern plastic, smaller size. Thanks to its small diameter (300 mm) of such products increases the velocity of the water that has a beneficial effect on its capacity and service life of the restored system is increased by 50 years.

Material

Posted by on Monday, 14 October, 2013

Heaters at the facility should be included after the circulation of material on and off for at least 5 minutes before turning off the circulation at the end of painting. For mixing the coating components, stirring device is used, it should work in the circulation time and the coating. Preparation of material in accordance with the manufacturer's recommendations material. Application of external anticorrosion coating Painters, move the products produced in cell staining. The painter controls the chamber temperature and humidity, dew point defines, controls surface temperature products using the appropriate instruments. Measuring partings should be believed. If the product temperature above the dew point of at least 3C, it is possible to coat the surface products.

If the surface temperature of the products is lower than in 3C dew point, it produced extra heating products in the chamber. Operating modes of the coating produced in accordance with the recommendations of the manufacturers materials. Coating products made on the length of the product, at the ends are recommended for several passages in diameter. Pistol to keep at a distance of 40-50 cm from the product and move it so that the torch was perpendicular to the insulated surface. The coating on the product to produce plots in the form of bands on several passes, applied band coverage should cover the band from a previous application to 1 / 3. The coating on the product is applied in several passes. The number of passes determined by the size and shape of the product. In order to prevent adding water stains, and a coating of uniform thickness recommended 5 – 10 passages when applied to each regular band.

Number of passes depends on the experience of the painter, area coverage, nozzle diameter nozzle. Coating of articles with complex configuration should start with the most difficult areas, then move on to the rest of the surface. When applied to control the thickness of the wet layer is necessary to use the comb. In the process of coating products must be applied coating on witness samples for testing the quality of coverage. Produce the control of coating thickness using an instrument designed to measure the thickness of nonmagnetic coatings. At sites with inadequate thickness cause an extra layer of coverage. The time between applying the base layer coating and an additional layer depends on the material. If you exceed the time, before the application is necessary to make preliminary preparation of the coating. Strip off the coating surface using a grinding machine and dedusted vacuumed or cleaned with compressed air. Produce the control of coating thickness in the field application an additional layer using an instrument to measure the thickness of the coating. The pressure difference on the gauge painting installation at the time of application should be no more than 30 bar. In the case of greater pressure difference to make adjustments in according to the manual installation. Products that are installed on the stand can be removed after a certain time depending on the material properties. Quality control and acceptance of products with the outer corrosion-resistant coating provides otc manufacturer.