Tanks Vertical Steel RVS produced by " Volgograd Plant Tank Structures" - PO VZRK have Certificates of Conformity No. ROSS RU. AV28.N12262, No. ROSS RU. AV28.N12263.
tanks vertical steel cylindrical ( RVS) are intended for receiving, storing, dispensing oil products and water, as well as other liquids, in various climatic conditions.
Production of steel cylindrical vertical tanks RVS, which are the cheapest type of oil storage, is carried out in a fairly short time.
Technology manufacturing of vertical tanks involves the use of methods of rolling, sheet-by-sheet assembly, as well as a combined method.
Types of roofs for RVS
Manufacture (production) of vertical RVS tanks by the method of rolling
Rolling is an industrial method of rolling into rolls of welded panels assembled from individual sheets processed around the perimeter. Advantage this method is to minimize welding work on the installation site by an average of 80%, since the work on the connection and welding of the walls, bottoms, pontoon bottoms and bottoms of floating roofs is carried out in the factory using automatic welding.
Steel sheets of modular dimensions 1500 × 6000 mm are welded using automatic equipment into panels of the required sizes and rolled up special devices, which provide their movement and transportation. The length of the rolls reaches 18 m, and the weight is consistent with the carrying capacity of the rolling stock.
The minimum installation time for vertical tanks in this way is reduced by 3–4 times compared to classical system production of RVS tanks from welded sheets.
Manufacture of vertical RVS tanks by sheet assembly method
In addition to the manufacture of vertical tanks by the roll method, the method of assembling the walls and bottoms of the RVS tanks in a sheet-by-sheet version of the walls and bottoms of the VST tanks using sheets with a maximum size of 2500 × 10000 mm is used.
Mechanical restoration sheet edges and chamfering with specified parameters for welding can be done in two ways: on stationary machines (face milling machine, longitudinal milling machine) and manual edge milling machines BM20. Sheet structures of the walls and bottom parts are packed and transported in specially made lodgements (containers).
It is possible to manufacture a vertical steel RVS tank from low-carbon, low-alloy and of stainless steel.
Standard versions vertical steel tanks:
Tanks can be installed underground or above ground. Underground tanks are tanks buried in the ground or sprinkled with soil, when the highest level of the liquid stored in it is at least 0.2 m below the minimum planning mark of the adjacent site, as well as tanks with a sprinkle of at least 0.2 m above the allowable oil product level in the tank and a width of at least 3 m. Ground tanks are tanks in which the bottom is at the same level or higher than the minimum planning mark of the adjacent site within 3 m from the tank wall. In the regions of the Far North with permafrost, the installation of reservoirs on pile foundations is practiced. All tanks are equipped with breathing valves to equalize the treatment inside the tank with the environment when pumping or pumping oil or oil products, receiving devices, and, if necessary, especially when storing oil and dark oil products, systems for washing out bottom sediments. Ventilation pipes on tanks for oil products with a flash point of less than 120 ° C are equipped with fire arresters. Receiving devices of storage tanks for light and dark oil products may differ in design. In the first case, the receiving and releasing device consists of a receiving and releasing branch pipe, a clapper, a clapper control mechanism, which includes a winch and a cable, bypass device and supply pipeline. In the second case, instead of a cracker, there is a riser pipe, which is a continuation of the intake and outlet pipe and is connected to the latter with a hinge. The cracker is a metal damper mounted on the intake and outlet pipe. The damper is mounted on a hinge and closes the branch pipe under the action of its own weight. The valve is opened either under the pressure of the pumped liquid, or with the help of a control mechanism. The control mechanism consists of a cable and a winch, which can have a manual drive for pipelines of small diameters (up to 350 mm) or an electric explosion-proof version for pipelines with a diameter of more than 350 mm. The opening pressure of the flap valve is determined by the weight of the flap itself and the hydrostatic pressure of the liquid column in the tank. The center of the axis of the clapper control mechanism is usually located 900 mm above the axis of the intake and outlet pipe, on which the clapper is attached. Tanks intended for the storage of viscous petroleum products are often equipped with heating systems and covered with heat-insulating non-combustible material. Brick, asbestos cement, slag wool, foam glass can be used as heat-insulating materials. The liquid stored in the tanks is heated by internal heaters with saturated steam or hot water. On the roofs of the tanks, in addition to breathing fittings, there are also skylights and technological hatches for measurements and maintenance, and on floating roofs, in addition, devices for removing atmospheric precipitation through a flexible hose or hinged pipe and a movable ladder. Tank farms for the storage of oil and oil products are complex engineering structures and consist of tanks, usually combined into groups, pipeline systems and other structures. To reduce the loss of oil products during their pumping and injection, groups of tanks with fixed roofs can be equipped with gas equalization systems. These systems are a network of gas pipelines connecting the vapor-air spaces of the tanks to each other through fire barriers. The gas equalization system also includes a gas tank, a condensate collector, a pump for pumping condensate and a condensate pipeline. To disconnect the gas space of individual tanks from the general network, there are shut-off valves and gate valves on the gas pipeline lines extending from the tanks. Reservoirs in which the formation of bottom sediments (sediments) is possible, leading to a decrease in their useful volume, are equipped with hydraulic washout systems. Systems for hydraulic washing of bottom sediments include: a pumping unit for supplying water to the system, a stripping pipeline with a diameter of 150-300 mm to a hydraulic ejector installation, a hydraulic ejector installation consisting of an ejector, a mobile electric pump and hydraulic monitors, a pipeline for removing paraffin-water mixture. Warehouses for oil and oil products, depending on the capacity of tank farms and the capacity of individual tanks, are divided into the following categories (Table 2). The unit nominal volume of tanks, the permissible nominal capacity of a group of tanks and the minimum distance between tanks in one group are determined according to the document and are presented in Table. 3. The vertical tank (RVS) is widely used in the domestic industry for reliable stationary storage of oil, gasoline, diesel fuel, fuels and lubricants, petroleum products and other liquids with increased density. Among the advantages of vertical tanks, one should highlight the short terms of design and subsequent production, as well as affordable price construction and installation finished construction. These advantages are harmoniously combined with increased reliability and durability. Thanks to this, you can use RVS at high-risk facilities. What are the types of vertical tanks?RVS are manufactured by the manufacturer "NEFTEPRAKTIKA" from high-quality and reliable steel with belts in a roll version or using the sheet-by-sheet assembly method. Thanks to modern production facilities our company can manufacture RVS of any type and volume as quickly as possible. We successfully produce: ● cylindrical vertical tanks; ● vertical fire tanks; ● rectangular vertical tanks; ● welded vertical tanks; ● vertical underground tanks; ● vertical tanks with a floating roof (RVSPK); ● vertical roll type tanks; ● vertical tanks with a pontoon (RVSP); ● vertical tanks with a conical bottom; ● vertical containers low pressure; ● vertical roll-up tanks. Choice the best option V this case depends on the type of stored product, the required volume of RVS in cubes, the hazard class of the object and a number of other factors. Responsive managers of our company will always help you to choose a suitable RVS. We will complete the project anywhere in Russia!The extensive geography of activity is one of the important benefits organization "NEFTEPRAKTIKA". We are ready to carry out the construction and installation of RVS in many cities of our country (Penza, Yaroslavl, St. Petersburg, Chelyabinsk, Saratov, St. Petersburg, Samara, Rostov-on-Don, Perm, Moscow, Magnitogorsk, Krasnoyarsk, Krasnodar, Irkutsk, Yekaterinburg, Chita, Trotsky ). If you drive into search engine the phrase "buy RVS" and do not know where to buy vertical containers with a quality guarantee, then with the help of our company you will have the opportunity to successfully resolve this issue. Impeccable service and prompt sales are our principles!To calculate the estimate for the manufacture of RVS, you need to fill out a questionnaire. Our experts will perform an exhaustive calculation, indicate the cost of the RVS device, answer questions of interest, prepare a drawing diagram and do everything possible to create on the very high level steel vertical tank. In our work we use the most modern technologies and stainless steel High Quality. Thanks to this approach, we can guarantee the high quality and advanced features of every VST produced. "NEFTEPRAKTIKA" is a reliable partner for your enterprise! What are steel vertical tanks (RVS), what are they for, how they are made and where you can buy them. Driving through railway stations or industrial areas, you can see futuristic cylindrical objects. silver color towering above the surrounding area by several meters in height. You probably wondered what it could be? These are the so-called vertical steel tanks (RVS). They are intended for the storage of petroleum products and various liquids with a density of 1 t/m³. Stationary storage. Water is also included in this list. The same tank, but for storing acids, alkalis, is made of high quality stainless steel. The cost of such tanks is higher. In order for the water not to freeze, the tanks are equipped with heaters (usually sectional or spiral). Also for this purpose, the container is thermally insulated from the outside with various materials. RVS is a cylinder made of steel, which has a conical bottom. Slope 1:100 from center to edge. To service the tanks, there is a fenced area and a metal ladder on the body. The RVS tank is the main technological structure of tank farms for reserve storage of petroleum products. They provide continuous reliable performance refineries and are an important link in the technological chain. Now throughput there are much more main oil product pipelines than a few years ago. In this regard, the volume of RVS is also growing. This is due to the fact that in order to complete the storage of tanks large capacity less space is needed than for a smaller capacity RVS. RVS structures are produced by rolling metal panels, sheet-by-sheet assembly, or by these two methods in combination. The manufacturing method depends on the customer's requirements. Tanks can be manufactured according to the customer's requirements and projects for various industries. All RVS meet environmental, sanitary and hygienic requirements, as well as the requirements fire safety and norms. At the request of the customer, they can be equipped with special hatches, metal stairs, service platforms, etc. High quality tanks are produced by CENTRREZERVUARSERVICE, which sells vertical tanks rezervuary.com, which has extensive experience in this area. The company is also engaged in the repair and installation of tanks, inspects tanks, paints tanks, cleans tanks from oil products, manufacture and installation of metal structures, manufacture of tanks and installation, equipment for tanks. Thus, RVS will always be in high demand for several decades to come. Due to the high quality requirements, it is certain that these products are strictly controlled at all stages of production. Therefore, there is no doubt about the quality of the products. RVS - steel vertical cylindrical tanks used for receiving, storing and dispensing liquid products. As a rule, vertical tanks are used to store:
The popularity of vertical cylindrical tanks as a way to store oil products, water and other liquids is due to their low cost, speed of manufacture and ease of operation. Technical characteristics of RVS cylindrical tanks:
Types of vertical steel RVS tanks:The choice of the type of cylindrical tank is made at its stage, depending on the stored product, features technological process enterprise and characteristics of the site where it will be installed.
Along with vertical tanks, the plant produces and. Production of vertical steel tanksVertical steel tanks in specially equipped plants by 2 methods: 1. Rolling method: With this method of production, the wall, bottom and roof are delivered to the construction site in the form of rolled welded panels. The advantages of this method are:
2. By sheet assembly method: The method consists in the fact that wall sheets are prepared at the factory ( maximum size sheets: 2500 × 10000 mm), rolled in the radius provided for by the KM project, and sheet parts of the bottom. Further, sheet elements are packed in a special way and prepared for transportation. completely carried out on site. Tanks steel vertical cylindrical are made of low carbon, low alloy or corrosion resistant steel. Structural elements of a vertical steel tankThe bottom of the steel vertical cylindrical tank.For the production of the bottoms of vertical tanks of the RVS type, steel with a thickness of at least 4 mm is used. In small volume tanks (up to 1000 m³ inclusive), the bottom, as a rule, is flat. For VST from 1000 m³ tank bottom made with a slope from the center or to the center. The slope is made in the ratio of 1 to 100. An annular edge is installed on the bottom of the VST tanks with a volume of more than 1000 m³. The thickness of the steel for the edge is from 6 mm or more, depending on the thickness of the lower belt of the VST. The dependence is shown in the table: The bottom of the tank is also often equipped with stripping sumps. They are designed to drain produced water, various deposits and contaminants and are installed in a specially prepared pit. If the slope of the bottom is towards the center, the stripping sump is located in the center of the bottom; if the slope is from the center (or with a flat bottom design) - the sump is located next to the wall at a distance of 600 mm and above. There are two types of sumps: round and tray. The wall of the steel vertical cylindrical tank.The wall is a steel panel welded from sheet metal into several belts. Using the rolling method, the wall is prepared at the factory in the form of a rectangular panel welded from sheet metal 1.5x6 m. A technological allowance of up to 300 mm is left on the panel, from which a jagged assembly joint is cut. Rolled products with a width of 1.8 m to 3 m and a length of up to 12 meters are used for the walls of a sheet assembly. Sheet edge processing is carried out mechanically(milling) or plasma cutting on machines with program management. Sheet rolling is carried out on 3 or 4 roll bending machines. Wall thicknessThe thicknesses of the wall chords are determined at the design stage of a vertical cylindrical tank to ensure the strength of the entire structure. The design thicknesses of the wall chords may include an allowance (margin) for corrosion. GOST 52910-2008 provides for the minimum structural thicknesses of the wall sheets of vertical steel VST tanks, depending on its diameter: Location in the wall of manholes and branch pipesFor the location of manholes and branch pipes in the wall of a vertical cylindrical tank, special holes are provided, which are equipped with a reinforcing pad around the circumference of the installed product (when installing products with conditional pass over 70 mm). In all tanks of the RVS type, a manhole is provided in the first zone of the wall. Vertical tanks with a floating roof RVSPk and with a pontoon RVSP are equipped with an additional manhole for access to the pontoon or roof. Wall anchorsWhen the force from the calculated seismic or wind load exceeds the restoring moment, anchoring of the wall is provided. They are located around the circumference of the wall at a distance of up to 3 m from each other. Stiffening rib.At the top of the wall of the cylindrical tank is the main annular stiffener. For RVSPk tanks with a floating roof, stiffeners are installed on outside walls below the upper edge by 1.1 m - 1.25 m. The annular stiffener, in addition to the function of strengthening the tank structure, acts as a service platform. Roof of a vertical steel tank.Depending on the size and other specific features, stationary roofs are used in vertical cylindrical tanks, which are divided into frameless (self-supporting) and frame roofs of conical and spherical shapes, as well as floating roofs. tank roof rests on a wall with an annular stiffener. The thickness of the roof decking and the section of the elements of frame profiles are designed from 5 mm. Conical shell (conical frameless roof)Applies to vertical steel tanks small volume (100 m³ - 1000 m³). It is a fixed roof in the shape of a cone. The taper angle (15° - 30°) ensures the load-bearing capacity of the tank roof. To increase the bearing capacity, the roof from the outside is equipped with frames (ring-shaped stiffeners). The flooring of such a roof is manufactured at the factory by the method of rolling or sheet by sheet. In the first case, metal-roll up to 7 mm thick is used, in the second - up to 10 mm. As a rule, a conical frameless roof is delivered to the installation site in the form of a round plate with a sector cut. This cutout provides the conical shape of the roof when its edges are pulled together during installation. Spherical shell (frameless spherical roof).It is used on vertical steel cylindrical tanks of medium volume (1000 m³ - 5000 m³). It is a stationary roof in the form of a sphere, which provides its bearing capacity. The load-bearing elements of the frame are absent. The radius of the sphere is designed within 0.8 - 1.2 of the diameter of the tank itself. The flooring of the spherical shell is carried out at the factory in the form of rolled elements of double curvature (in the meridional and annular directions) from rolled metal up to 10 mm thick. At the assembly site, the rolled elements are welded to each other with double-sided seams. Framed conical tank roofIt is used on vertical cylindrical tanks of medium volume (1000 m³ - 5000 m³). tank roof is a fixed roof in the form of a cone. Angle of inclination: 4.76º - 9.46º. Consists of: (1) central shield; (2) sector frames; (3) ring frame members; (4) floor panels. All of the above items are manufactured in the factory. The floor panels can be produced, in particular, by the method of rolling. In this case, during installation, they are deployed on the ground near the bottom and then attached to the already connected frames. Flooring panels can also be produced in a sheet-by-sheet manner. Also often used is the practice of manufacturing roof shields in the factory, consisting of interconnected frame and deck elements. In this case, the roof panels are delivered to the installation site in a special package. The conical frame roof can be produced in an explosion-proof design (easy drop roof). In this case, the roof deck is not welded to the frame, but is attached only to the upper annular wall element. This achieves that in case of an emergency excess of pressure inside the tank, the flooring is torn off the wall. At the same time, the tank itself is not destroyed and the integrity of the wall attachment to the bottom is maintained. Spherical frame (dome roof)It is used on vertical steel tanks of large volume (from 5000 m³, but not more than 50 m in diameter). They are a stationary roof in the form of a sphere with a radial-annular frame system. The radius of the sphere is designed within 0.8 - 1.5 diameters of the tank itself. Spherical frame tank roof consists of: (1) central shield; (2) rolled radial beams; (3) ring frame members; (4) stiffening rings along the perimeter of the wall; (5) flooring sheets. All of the above items are manufactured in the factory. They are delivered to the assembly site in the form of ready-made panels and separate elements of the frame and flooring. The flooring is prepared sheets of metal for sheet assembly, or large-sized cards prepared at the factory. Also, spherical roofs are made in explosion-proof design. In this case, the decking is attached only to the bordering element along the circumference of the roof. This achieves that in case of an emergency excess of pressure inside the tank, the flooring is torn off the wall. At the same time, the tank itself is not destroyed and the integrity of the wall attachment to the bottom is preserved. Floating roofs.They are used in those not equipped with a fixed roof. This type roofs can be used in areas with standard snow load up to 1.5 kPa. There are 2 main types of floating roofs used in tank building practice: (1) single-deck floating roof and (2) double-deck floating roof. Medium-sized tanks (with a diameter of up to 50 m) are equipped with single-deck floating roofs, which are installed at production sites with a standard wind speed of 100 km/h. Single-deck floating roofs are manufactured at the factory and consist of:
Double-deck floating roofs are designed for vertical tanks with a larger diameter (over 50 m) and for areas with higher wind load. Its design allows to reduce dynamic loads on the membrane. There are two options for building a floating roof of this design: (1) the roof is completed with radial compartments and annular compartments of the central part, formed during installation; (2) Radial ducts are factory manufactured to reduce installation work. When installing a floating roof, the membrane is sloped towards the center by weight. This allows you to divert storm water from the surface of the prusha. In the center, a flexible or articulated water outlet is mounted, equipped with an intake device and check valve. This design allows water to be drained and, at the same time, prevents the product stored in the cylindrical tank from protruding onto the roof surface. Seal closures are used to seal gaps between the edge of the floating roof and the tank wall and between the roof spigots and the rails. The material from which they are made is selected from accounting chemical composition and temperature of the product stored in the tank, service life requirements, gas tightness and other specific factors. Tank ladders, platforms and walkwaysstairsTo climb vertical cylindrical tanks, 3 types of ladders are used: ladders for VST of small volume (up to 500 m³), shaft ladders and ring ladders. Tank shaft ladder installed on a separate foundation. In the manufacture of metal structures by the rolling method, the shaft ladder serves as a technological frame (coil) for the tank - welded panels of the wall, bottom and roof decking are wound around it. This provides savings when ordering the entire product, since it eliminates the need to produce a technological frame, which is a non-returnable package. The circular staircase is fixed only on the tank wall, its lower flight is 250 mm behind the ground. This ladder design is more convenient for maintenance of process equipment. Tank ladders vertical steel are arranged with a minimum width of 700 mm. The ladder is installed at an angle to the horizontal surface of not more than 50 ° so that a concentrated load of 4.5 kN is maintained. If the height of the stairs exceeds 9 m, the project provides for intermediate platforms at a distance of no more than 6 m from each other. Steps are made of perforated, lattice or corrugated metal with a minimum width of 200 mm, a height of not more than 250 mm and with a slope of 2 ° to 5 ° to the back face. The handrails of the stairs are made in such a way that they can withstand a horizontal load of 0.9 kN in top point and mounted at a height of 1 m. Platforms, crossings and fencesOn vertical cylindrical tanks with a fixed roof, a fence is installed around its entire perimeter. Also, fences are mounted on the outside of the service platforms located on the roof. The fence is designed so that at any point it can withstand a load in any direction of 0.9 kN. Crossings and service platforms are also used. They are equipped with railings at a height of 1.25 m. Platforms and walkways can withstand a concentrated load of 4.5 kN (on the platform 100 mm x 100 mm). Related Articles
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