Tag Archive: promyshlennoct and equipment

Western European

Benefits of the Finnish metal formed at the stage of rolled steel. Properties of the steel must be capable of high-quality coating, soft enough to be profiled, and at the same time, the hardness for use on roof. Optimal combination of these parameters is ensured by strict control at all stages of production. Finnish metalocherepitse not aware of the problems coating delamination and inhomogeneity of color. Cause occurrence of such problems is the use of unreconciled primer. Find out detailed opinions from leaders such as incyte by clicking through. The result – pyatnoobraznoe rust and fading, the sheets of the various parties of the same color shade may vary. As for the Finnish metal, different party rental identical for decades. Deserves special attention to the thickness of rolled metal.

As a rule, the Swedes use rental 0,4 mm thick. Sheets of such thickness so vulnerable during installation that does not comply with the requirements of building a number of Western European countries. Some Russian manufacturers are using rolling thickness 0,55 mm. This rental is more difficult to handle because of its rigidity. The result – a violation of geometry and clearly visible seams between the sheets, which destroy the perception of the integrity of the roof. Finnish rental has a thickness of 0.5 mm, and resistant to mechanical stress and is profiled so that the roof looks as a whole, and the joints can be seen, only rising to the roof. When choosing metal roofing should also consider the following factors: the manufacturer (brand), an assortment of roofing components, type of profile, color, cover type, the seller.

Roll Machine Production

Roll forming equipment for the production of galvanized profiles for frame construction is a mini-factory for the production of a complex profiles for frame construction and for construction and reconstruction of the loft. Mini production of rolled sections include: cutting the line, production line for hat profile height 25mm. and 45mm. performing the role of the sheathing; line for production of C and U shaped profiles (Rack and guide), thermo. Forming equipment is optimal, economical and modern tool for the creation of galvanized profiles. Technology of light steel thin- (LSTC) is combined with any conventional technology, by adding them to their advantage: the high rate of construction, low operating cost, free planning, environmental friendliness, completeness of delivery structures on the object, the geometric precision of design and a variety of external finishes.

Building structures based on thin-walled galvanized profiles allow you to apply shallow foundations and produce reconstruction of the roof of the old buildings without increasing substructure due to its low weight. Roll forming equipment for the production of metal intended for the manufacture of metal "Monterrey" "Cascade", "Dune" roll of metal with a lacquer coating. Roll forming equipment for manufacturing, often called simply – Roll Machine. Metal simulates natural tile and is a corrugated steel sheet. The most common is a metal roofing profiles Monterrey, reliable, high-quality, beautiful roofing material, which combines spectacular tiled pattern and practicality. Line for the profile of the Cascade – 21 "produces just 3 types of products: metal" Cascade ", roof profiled MP-20, wall corrugated board CH-20. Profiles produced in the line of the Cascade-21 "are among the the most economical, used for finishing the roofs and facades.

Rosgospena Foaming Agents

Foaming agents are concentrated aqueous solutions of surface-active substances (SAS) and are designed for foam or wetting solutions used in extinguishing fires. Foaming agents in Depending on the chemical composition (surface-active basis) divided into synthetic ftorsinteticheskie, protein, ftorproteinovye. Blowing agents for extinguishing fires in terms of aggregate destination divided into classification groups depending on the application (according to gost 50588): – foaming agents, synthetic hydrocarbon general – purpose foaming agents for: – use in sea water for use at low temperatures, with increased fire extinguishing capability for extinguishing foam of high multiplicity, etc.) – synthetic fluorinated film-forming purpose AFFF; – synthetic fluorinated film-forming earmarked for fire-soluble (polar), flammable liquids AFFF-AR; – protein (including fluoride). Foaming agents, synthetic hydrocarbon utility used for fire extinguishing foam and wetting solutions. These foaming agents were most widely used due to the relatively low cost and availability of raw materials, as well as proven technology of their manufacture.

By extinguishing efficiency, they are inferior foaming agents purpose. Foaming agents include anionic hydrocarbon surfactants with the addition of a corrosion inhibitor. Foaming agents, synthetic hydrocarbon purpose are used for foam to extinguish oil and combustible liquids of different classes, the most inflammable objects, as well as for use with sea water for use at low temperatures, with increased fire extinguishing capability for extinguishing foam of high multiplicity, etc. Foaming agents comprise a mixture of hydrocarbon surfactants with stabilizing additives. Foaming agents, synthetic fluorine-containing film-forming purpose are used for foam to extinguish oil and combustible liquids of different classes, most fire objects.

Unheated Power

In most cases, failures of electrical and electronic equipment caused by overvoltage and / or load changes in the lines of supply. The main reason for the high sensitivity of modern electrical equipment to electromagnetic disturbances caused by the use of integrated semiconductor devices of high dimensionality. The most common source of surge is lightning. It's an unpredictable natural phenomenon of high intensity can cause overvoltage surges transmitted through air supply line, a distance of up to several kilometers from the lightning strike. Spreading of the lightning current along the surface of the earth can cause impulse voltage in cable networks, electric power. In addition to the pulse caused by lightning, surges in the electricity network can be caused by turning on and off of inductive loads (eg motors) or capacitive loads (capacitors for power factor correction) etc. To protect equipment and users, at the entrance of the active power equipment necessary to provide special security devices. These devices divert surges in power lines from the sensitive electrical equipment on the ground.

Currently on the market to achieve the required high level of protection uses the following technologies: Spark gaps. Spark gap – Unheated gas-filled device, dramatically changing its electrical conductivity when a discharge between the electrodes. His used as a rapid switch in communication devices, locations, nuclear and experimental physics, etc. The design gap is simple: in a glass or ceramic container filled with gas, there are 2 or more electrodes from refractory metals or their alloys. For the filling used inert gases and their mixtures, hydrogen, nitrogen, oxygen, air, water vapor.

Common Notions About The Weldability Of Metals

Welding – a complex of several simultaneously occurring processes, the main ones are: the thermal effect on the metal in the weld areas, melting, metallurgical processes, mutual crystallization of metals in spot weld fusion and crystallization of the metal. Weldability – a feature of metal and metal to create a combination for a given welding compound, which meets the requirements stemming from the exploitation product and its device. The complexity of the concept of weldability of materials suggests that in assessing the weldability should take into account the relationship of welding technology in product design and welding of metals and materials. Weldability of many indicators. Measure of the weldability of alloy steels used for the production of chemical equipment, is the ability to produce welded joints that would ensure special qualities – strength at high or low temperatures, corrosion resistance. When welding dissimilar metals weldability criterion is the possibility of education in the United interatomic bonds. Homogeneous metals are joined by welding without the complexity, while some pairs of dissimilar metals are absolutely not form a compound of atomic bonds, for example, welded copper with a crown, or titanium with a carbon steel.

Significant indicator of the weldability of metals is the ability to avoid in the welded joints hardened areas, cracks and other defects that adversely affect the work of the welded product. All this suggests that no single criterion of weldability of the metal. Weldability of metals analyze the physical and technological points of view. Thermal effect on the metal in the weld areas, and the melting process expressed by the welding of his regime. Technological weldability is the ratio of metal to a specific method of welding and the regime. Physical weldability seen occurring in the area of fusion welded metals processes, so there-in-one weld.

Convergence of the particles and create favorable conditions for their interaction is the chosen method of welding, and the flow relevant chemical and physical properties of processes expressed in the joined metals. These properties of welded metals make them a physical weldability. Metals can be either the same or different features and chemical composition. In the first case in terms of chemical composition and properties, it will be homogeneous metals, in the second – mixed. All metals have homogeneous physical weldability. Properties of heterogeneous metals sometimes can not provide the necessary flow of chemical and physical processes in the fusion, so the metals do not have the physical weldability.