Group of companies "Gazovik" accepts orders for the manufacture vertical steel tanks By technical requirement of the customer, tanks for gas stations, tanks for storing oil products and fire tanks of any size and configuration.
Vertical steel tanks RVS are manufactured in accordance with TU 3615-009-37815352-2013.
Questionnaire for the supply of vertical RVS tanks
Storage tank (French re "servoir, from lat. Reservo - I save, I save) - a container designed to store, receive, pump out and measure the volume of liquids or gases.
Depending on the volume and location, the tanks are divided into three classes:
class I- especially dangerous tanks: with a volume of 10,000 m 3 or more, as well as tanks with a volume of 5,000 m 3 or more, located directly along the banks of rivers, large reservoirs and within urban areas;
class II- reservoirs heightened danger: volume from 5000 to 10000 m 3 ;
class III- hazardous tanks: from 100 to 5000 m 3
The degree of danger is taken into account in the design special requirements to materials, control volumes.
The main methods of manufacturing vertical tanks- sheet assembly, roll method or combined method.
The data for the method is provided by the customer, and is also offered by our specialists on the basis of general requirements to RVS.
Vertical RVS tanks are manufactured and operated in accordance with the requirements of the following standards:
- GOST 31385-2008 "Vertical cylindrical steel tanks for oil and oil products. General specifications"
- STO 0048-2005 "Vertical cylindrical steel tanks for storing liquid products. Design rules"
- STO-SA-03-002-2009 "Rules for the design, manufacture and installation of vertical cylindrical steel tanks for oil and oil products"
Based on state standards, the structural parts of the RVS hull are divided into:
- main load-bearing structures
;
-Walling;
TO main supporting structures RVS include:
- wall (including tie-in pipes and hatches);
- bottom edge ring;
- frame and support ring of the frame roof;
- roof anchoring;
- stiffening rings on the wall.
The main requirement for the main load-bearing structures is to ensure the strength of the VST hull as a whole.
TO enclosing structures RVS include:
- the central part of the bottom;
- stationary roof decking;
- floating roof;
- pontoon.
Bottoms of RVS tanks can be flat and conical with a slope from the center or towards the center. All bottom sheets of tanks V = 1000 m 3 and less must have a nominal thickness of at least 4 mm. Tank bottoms V=2000 m 3 and more have central part and thickened annular edges.
Constructions stationary roofs RVS are divided into the following types:
- self-supporting conical roof, the bearing capacity of which is provided by the conical shell of the flooring;
- frame conical roof, consisting of frame elements and flooring;
- a domed roof, the surface of which is close to spherical and is formed by curved frame elements and enlarged flooring elements.
Constructions floating roofs can be of the following types:
- floating roof of a single-deck design with sealed boxes located along the perimeter;
- a floating roof of a two-deck design, consisting of sealed boxes that form the entire surface of the roof;
- a floating roof of a float type.
TO component structures of vertical RVS tanks include:
- lightning rods and grounding fastening structures;
- structures for maintenance of foam generators;
- brackets for fire extinguishing and irrigation pipelines;
- sump (pit) for stripping bottom sediments;
- bottom cleaning hatch;
- manholes and pipes;
- auxiliary metal structures;
- other designs according to the customer's instructions.
Based on state standards, all tanks are divided into the following types:
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with fixed roofs - conical or spherical (RVS);
- with explosion-proof fixed roofs - conical or spherical (RVS);
- with floating roofs (RVSPK);
- with pontoon (RVSP);
- single-walled or double-walled execution (with a protective wall);
- according to special projects, with reference to specific operating conditions.
Depending on the purpose and type of the stored substance, the tanks are subjected to heat and waterproofing, and their inner walls are lined (for example, with acid-resistant materials). Tanks are equipped with heaters, breathing, safety and other valves, fittings, receiving and distributing devices, cleaning devices, level gauges, etc.
Tank Design Plant StroyTechMash designs and manufactures vertical tanks RVS and RVS with a volume of 100 to 5000 cubic meters. on their own production facilities. We also provide professional installation, insulation and application anti-corrosion coating on the inner and outer surface of vertical tanks of the RVS type.
Metal cylindrical tanks of vertical design are manufactured in accordance with the requirements of the Safety Rules PB 03-605-03 "Rules for the construction of vertical cylindrical steel tanks for oil and oil products" and GOST 31385-2008 and GOST 52910-2008 "Vertical cylindrical steel tanks for oil and oil products" .
Plant "StroyTehMash" manufactures metal structures of tanks by rolling. The panels of the wall and the bottom are welded on a slipway and twisted on a rolling machine into a roll onto a metal frame, inside of which a spiral staircase is usually placed.
SPECIAL PRICE FOR VERTICAL TANKS - 82 rub/ton
PRODUCTION TIME - 10 working days
Tanks are manufactured in volumes from 10 cubic meters. (10 tons) up to 5000 cubic meters (5000 tons). Construction of vertical tanks with a volume of more than 5000 cubic meters. they are produced directly at their location using the sheet-by-sheet assembly method, since transportation is quite expensive and, depending on the distance, can cost more than the tank itself.
In the photo, the vertical tank RVS-2000 consists of two coils and a petal roof.
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Characteristics of typical vertical tanks (RVS)
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Designation |
Volume, cu. m |
Diameter, mm |
Height, mm |
Thickness walls, mm |
Number of belts, pcs. |
Weight, kg |
Surface area, sq. m. |
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outdoor |
internal |
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| 4 | 8200 | |||||||
| 8500 | ||||||||
Cylindrical vertical tanks are made of various brands steel, depending on the purpose and the stored liquid. So for oil and oil products, vertical tanks are made of black steel grades ST3 and 09G2S. For drinking water, acids and alkalis, vertical tanks are made of of stainless steel various grades, including from food stainless steel. The thickness of the metal walls for vertical tanks varies depending on their volume, the density of the stored product and the estimated service life, and ranges from 4mm. up to 12mm. For example settlement period services of the vertical tank RVS-400 for light oil products from black steel grade ST3 4 mm thick. is 12 years old. Each additional 2mm of metal thickness on the wall, bottom and roof of the tank adds 5 years to the estimated service life of the tanks. Although these figures are approximate and depend on the quality of maintenance of the vertical tank and its anti-corrosion coating.
Geography of deliveries of vertical RVS tanks
To date, the Plant of Reservoir Structures StroyTechMash has successfully manufactured and installed VST steel structures in many cities of Russia. This list includes: Moscow, Tver, St. Petersburg, Ryazan, Tula, Kaluga, Smolensk, Voronezh, Lipetsk, Tambov, Belgorod, Saratov, Krasnodar, Rostov-on-Don, Kazan, Nizhny Novgorod, Yaroslavl, Ulyanovsk, and other cities and regions of Russia. Thanks to highly qualified specialists of our company, the quality of manufacturing and installation of vertical RVS tanks remains at a high level.
In the photo, the installation of a vertical tank RVS-1000 in Moscow
Tanks for oil and oil products are an indispensable and time-tested method of storing hydrocarbons in oil depots, refineries, chemical industry enterprises and as a reserve for diesel fuel in boiler houses and power plants.
For the central and southern regions of Russia, the tanks are made of steel of the St3ps5 grade, and for the northern regions, steel of the 09G2S grade is used.
The dimensions and weight of a vertical tank depend both on the volume and on the thickness of the sheet steel used in their manufacture.
After graduation welding work vertical tanks are primed and coated with anti-corrosion enamel to prevent rust both outside and inside.
As a rule, tanks intended for storing water and diesel fuel are insulated and heated. Insulation is made with thermal insulation made of mineral wool 50mm or 100mm thick. and sheathed on top of a galvanized sheet with a thickness of 0.5-1mm.
Heating of vertical tanks is carried out either by steam using a pipe coil device at the bottom of the tank, or by an electric heating cable mounted on the bottom of the tank. outside walls.
A special place in our production is occupied by RVS fire tanks designed for fire extinguishing systems of office, public and administrative buildings, shopping and industrial complexes.
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| installation of RVS-200 under diesel fuel | vertical tank RVS-200 installation | vertical tank installation work |
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| RVS-400 for Reutov heating system | RVS400 tanks with insulation |
Methods for the manufacture of RVS tanks
RVS type tanks are manufactured by two methods:
1. Rolling or an industrial manufacturing method involves welding the entire wall and the entire bottom of a vertical tank in the form of a panel spread on a slipway and further winding this web on a coil.
2. The sheet-by-sheet assembly method implies the assembly of the bottom and wall of the RVS tank at the place of its installation by sequentially building up each sheet of metal gradually from the bottom up. This method is used if the thickness of the metal sheets from which the tank is made exceeds 10 mm, as well as during the construction of vertical tanks with a volume of more than 5000 m3
In rare cases, in the manufacture of RVS tanks of non-standard design, a combination of the two methods listed above for the manufacture of vertical tanks is used in the manufacture.
It is worth noting that the rolled production of vertical tanks was developed and introduced from the mid-50s of the 20th century by the Institute of Electric Welding named after Paton E.O. Academy of Sciences of Ukraine. This method was mastered, implemented and put on stream production with subsequent installation in all areas Soviet Union. As a rule, the bottom panel is rolled up into rolls of the same diameter as the walls, and wrapped around the central post supporting the roof of the vertical tank. The manufacture and RVS in this order was called the industrial method.
Design of vertical tanks
The design and engineering bureau of the StroyTechMash Reservoir Design Plant carries out the design of vertical tanks with a volume of 10 to 5000 m3. Standard designs for vertical tanks of the RVS type have existed since the 1970s and were developed by various design institutes of the USSR. But in typical projects, such nuances as snow load, density of the stored product, seismic activity at the site of the future installation, service life and piping of the vertical tank are not taken into account. When designing tanks, the design bureau of the StroyTechMash Plant takes into account all of the above nuances, as well as the individual wishes of the Customer.
Installation of vertical tanks
The Plant of Tank Structures StroyTechMash has its own field team for the installation of vertical tanks. Installation of RVS tanks is carried out in any month of the year, but at an ambient temperature higher than minus 15C Celsius. This is due to the quality of the superimposed weld, at an ambient temperature below -15 ° C, the weld hardens too quickly and voids remain in it (the so-called fistulas). Installation work, for unwinding the wall and bottom from the coil, are carried out using a crane and manual winches with a vertical tank volume of up to 2000 m3, and with a volume above, tractors are involved.
Steel vertical cylindrical tanks RVS used for receiving, storing and dispensing liquid products. As a rule, vertical tanks are used to store:
- oil and oil products (gasoline, diesel fuel, kerosene, fuel oil),
- industrial alcohols, ammonia water,
- liquid raw materials for the food industry: vegetable oils, sugar syrups, etc.
- liquefied gases
- water, including fire-fighting stock.
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:
| Name and volume of the tank m³ |
Diameter, m |
Height, m |
Wall mass, t | Bottom mass, t | Roof weight, t | Weight of other structures, t | Frame and package weight, t | Total mass of the tank, t |
| RVS-100 | 4,73 | 6,0 | 3,60 | 0,76 | 0,87 | 2,14 | 2,10 | 9,47 |
| RVS-200 | 6,63 | 6,0 | 50,3 | 1,47 | 1,69 | 2,47 | 2,10 | 12,77 |
| RVS-300 | 7,58 | 7,5 | 7,18 | 1,95 | 2,34 | 2,84 | 2,30 | 16,61 |
| RVS-400 | 8,53 | 7,5 | 8,04 | 2,40 | 2,66 | 3,60 | 2,30 | 19,01 |
| RVS-500 | 8,45 | 9,3 | 11,75 | 3,48 | 5,05 | 3,76 | 2,30 | 26,34 |
| RVS-700 | 10,43 | 9,0 | 11,75 | 3,58 | 5,08 | 5,55 | 3,20 | 29,16 |
| RVS-1000 | 10,43 | 12,0 | 16,51 | 3,47 | 5,01 | 5,86 | 3,80 | 34,67 |
| RVS-2000 | 15,18 | 12,0 | 25,08 | 8,46 | 13,84 | 6,16 | 5,20 | 58,74 |
| RVS-3000 | 18,98 | 12,0 | 38,60 | 13,43 | 22,80 | 7,38 | 5,70 | 87,91 |
| RVS-5000 | 20,92 | 15,0 | 64,42 | 17,73 | 26,20 | 8,42 | 10,80 | 127,57 |
| 22,8 | 12,0 | 54,10 | 18,98 | 33,95 | 8,61 | 7,80 | 23,43 | |
| RVS-10000 | 28,5 | 17,9 | 86,72 | 42,15 | 78,61 | 12,82 | 14,00 | 234,30 |
| 34,2 | 12,0 | 120,92 | 30,90 | 54,65 | 12,28 | 21,48 | 240,23 | |
| RVS-20000 | 39,9 | 17,9 | 225,14 | 57,41 | 106,05 | 16,78 | 27,37 | 432,74 |
| RVS-30000 | 45,6 | 18,0 | 284,25 | 91,42 | 145,47 | 30,16 | 44,10 | 595,40 |
| RVS-50000 | 60,7 | 18,0 | 431,91 | 154,23 | 325,05 | 16,09 | 67,00 | 994,29 |
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.
There are 4 main types of vertical cylindrical tanks:
- RVS - a vertical steel tank with a fixed roof without a pontoon.
- RVSP - vertical steel tank with fixed roof and pontoon
- RVSPk is a vertical steel tank with a floating roof.
- Tanks with a protective wall ("glass in a glass").
- RVS - a vertical steel tank with a fixed roof without a pontoon.
They are used to store products with relatively low volatility (with a saturated vapor pressure of not more than 26.6 kPa) and an ignition temperature of more than 61 0 C. Most often, fuel oil, diesel fuel, household kerosene, bitumen, tar, oils (in including food) and water. Also, steel vertical cylindrical tanks with a fixed roof without a pontoon can be used to store more volatile (with DNP up to 93.3 kPa) and flammable products. In such cases, the RVS tank is equipped with a gas piping or a light fractions recovery unit. - RVSP - vertical cylindrical tanks with a fixed roof and a pontoon
They are used to store products with saturated vapor pressure in the range of 26.6 - 93.3 kPa and an ignition temperature of less than 61 0 C. Most often they store oil, gasoline, kerosene, jet fuel. A pontoon is a rigid, gas-tight, disk-shaped floating cover placed on a product mirror inside a cylindrical tank so that at least 90% of its area is covered. The annular gap between the pontoon and the tank wall is sealed with a special sealing gate. The pontoon serves to reduce the rate of saturation of the gas-air space of the vertical tank with vapors of the stored product. - RVSPk is a vertical steel tank with a floating roof.
This design of the tank involves the use of a roof located on the surface of the stored product with full contact. The buoyancy of the roof is achieved through the use of sealed compartments or boxes. In an empty vertical cylindrical tank, the roof is located on special supports mounted on the bottom. The elimination of rotation of the floating roof of the tank is achieved by using guide pipes. The disadvantage of a floating roof is the possibility of contamination of the stored product due to precipitation. There are also cases of freezing of the sealing shutter of the roof to the wall. The advantages of this roof design are in reducing product losses from evaporation. - Cylindrical tanks with a protective wall ("glass in a glass").
This design of the vertical tank is used at production sites where there is no possibility of tank farm bundling. Also, cylindrical tanks with a protective wall are built near water bodies and residential settlements to ensure safety. environment and the population. The protective wall is mounted in order to prevent spillage of the product in case of depressurization of the working tank.
Along with vertical tanks, the plant produces horizontal tanks and underground tanks.
Production of vertical steel tanks:
vertical 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. Advantages this method consists in:
- reduction of installation time by 3-4 times by minimizing welding work at the installation site by an average of 80%;
- providing High Quality welds through the use of 2-sided automatic welding in the factory at the manufacturer;
- For the manufacture of panels, steel sheets of modular dimensions 1500 x 6000 mm are used. Welded panels are made on a special stand (installation) of rolling by means of automatic welding.
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 tank
The 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 thickness
The 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 thickness of the wall chords may include an allowance (margin) for corrosion. the minimum structural thicknesses of the walls of the walls of vertical steel VST tanks are provided, depending on its diameter:
Location in the wall of manholes and branch pipes
For 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 lining 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 anchors
When 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 the outer side of the wall below the upper edge by 1.1 m - 1.25 m. In addition to the function of strengthening the tank structure, the ring stiffener 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 form 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 roof
It 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 maintained.
Floating roofs.
They are used in steel tanks that are 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:
- sheet membrane, made by the method of rolling or sheet-by-sheet method;
- ring boxes located around the perimeter.
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 walkways
stairs
To 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 fences
On 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).
Vertical steel tanks (RVS) are applied, first of all, to oil storages and oil depots. So, they are practically indispensable in the process of stationary storage during the extraction, further processing and wholesale distribution of oil and oil products. However, vertical steel tanks can also be used in the process of industrial production of beverages, vegetable oil, as well as bulk and liquid substances, the density of which is not higher than a ton per cubic meter, and the internal overpressure does not exceed 200 mm of water column. In addition, such substances must have a working environment temperature ranging from -60 to +90 degrees C.
The volume of RVS tanks is from 50m3 to 5000m3 (The data is based on standard designs, the actual product data will be contained in the developed projects commercial offer based on customer requirements and questionnaires completed by the customer.)
| Characteristic |
Volume of tanks, m 3 |
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Diameter, D, m |
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Wall height, H, m |
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Product mirror area, m 2 |
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Maximum loading height, m |
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Product density, t / m 3 |
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Internal overpressure, kPa (mm water column) |
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Vacuum, kPa (mm water column) |
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Product temperature, o C |
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Seismicity of the area, score |
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Outside air temperature, o C |
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Load from thermal insulation on the roof, kPa |
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Load from thermal insulation on the wall, kPa |
For those climatic zones where the minimum ambient temperature is -40, RVS steel tanks can also be made of steel class St3, in the same areas where the temperature drops below, it is recommended to use products from steel 09G2S. Steel tanks of vertical type, in which drinking water, various kinds of acids, as well as food liquids should be stored, are made of corrosion-resistant steel 12X18H10T (AISI 321) or its analogues.
Examples of vertical steel RVS tanks manufactured by our company:
You can also see examples of tanks and containers we have made in the section - "Portfolio"
Vertical steel tanks, the volume of which does not exceed 3000 m3, are produced by the method of rolling, containers with a large volume can be manufactured both by means of rolling and by sheet assembly directly at the assembly site.
Weight of tanks this class depends on the corrosion allowance in the area of the tank body and ladder. More accurate information can be obtained by calling us by phone or by contacting us at e-mail.
All tanks are divided into two types: a vertical cylindrical tank (RVS) and a horizontal cylindrical tank (RGC). The appearance of RVS is associated with the name of a Russian engineer - Shukhov V.G., whose projects served as an analogue for the construction of the first steel tanks used to store oil, gasoline and kerosene. RVS are technological tanks for storing, receiving and dispensing oil products, oil and other liquids, the density of which is up to 1 t/m3 inclusive. Most often they are used to store liquids with an aggressive environment, namely: oil, dark and light oil products, acids, chemicals, alkali. That is why the main material for their manufacture is stainless steel.
Tank device
Externally, the RVS tank is a steel vertical cylinder with a conical bottom, the slope of which from the center to the edge of the tank is 1:100, and a conical frameless or shield cover with a slope of 1:8. In order to prevent freezing and application this equipment in any climatic conditions tanks are equipped with steel spiral or sectional heaters and thermal insulation. For maintenance, the tank is also equipped with an external ladder and fenced steel platforms.
Scope of the RVS tank
RVS is one of the fundamental technological structures in tank farms of oil pumping stations, oil depots, oil product pipelines, cluster collection points and central commodity parks of oil fields, and tanks of oil refineries. The main purpose of RVS is to provide full support for reliable operational operation and technological communication from the “field” to the “refinery” or from the “refinery” to the “consumer”.
Types of RVS tanks
Depending on their design features RVS tanks are divided into:
- RVSPK (tanks with a floating roof);
- RVSP (tanks with fixed roof and pontoon);
- RVS (tanks with a fixed roof without a pontoon).
According to the design features of the RVS, there are ground and underground types.
Selecting the type of RVS tank
The type of tank is determined depending on the class of oil and oil products in terms of saturated vapor pressure and flash point:
- at a saturated vapor pressure in the range of 26.6-93.3 kPa (200-700 mm Hg) and with a flash point up to 61 ° C (oil, jet fuel, gasoline, jet fuel), RVSPK, RVSP or RVS equipped with installation for capturing light fractions and a gas piping device.
- at a saturated vapor pressure of less than 26.6 kPa and a flash point of more than 61 ° C (diesel fuel, fuel oil, oil, bitumen, formation water), RVS or RVSP without a gas piping device are used.
RVS hazard classes
RVS tanks are divided into 3 classes depending on the location and volume:
- Especially dangerous tanks:
- - with a volume of 10 thousand m 3;
- - with a volume of 5 thousand m 3 or more, located along the banks of large reservoirs and rivers, or in an urban area.
- Reservoirs of increased danger with a volume in the range from 5 thousand to 10 thousand m 3
- Hazardous tanks - volume in the range from 100 to 5000 m 3.
The hazard class of tanks is one of the fundamental factors in their design. It is taken into account in the requirement for the materials used, the calculation of the reliability coefficient and the scope of control of the documentation of the installation complex.
The main characteristics of the RVS catalog
Depending on the capacity of the tank, its height, diameter and mass are determined:
- RVS 100 m 3 the following parameters are set: 6000mm / 4900mm / 8200kg - height, diameter and weight, respectively;
- RVS 200 m 3 - 6000mm / 6600mm / 12000kg;
- RVS 300 m 3 - 7500mm / 7500mm / 15000kg;
- RVS 400 m 3 - 7500mm / 8500mm / 18800kg;
- RVS 700 m 3 - 9000mm / 10500mm / 26500kg;
- RVS 1000 m 3 - 12000mm / 10500mm / 33700kg;
- RVS 2000 m 3 - 12000mm / 15200mm / 63600kg;
- RVS 3000 m 3 - 12000mm / 19000mm / 87500kg;
- RVS 5000 m 3 - 15000mm / 20920mm / 127560kg.
Production of RVS tanks
Vertical steel tanks are produced exclusively according to individual projects. Whole manufacturing process complies with all legally established requirements of fire, environmental and sanitary and hygienic standards. The supply of tanks is carried out in the form of a roll. At the design stage, the need for the customer to have separate components in the tank is taken into account: branch pipes, hatches, service platforms, ladders, etc.
Methods for the manufacture of RVS tanks
Regardless of the country of manufacture, welded vertical tanks are manufactured by three methods:
- roll method;
- belt growing method;
- belt extension method.
At the same time, the last two manufacturing methods are conventionally also called the “sheet-by-sheet method”.
Production of RVS tanks at MPK Engineer LLC
LLC "MPK Engineer" is engaged in the manufacture of a large range of metal products, in particular RVS tanks to order various types and appointments. Every individual order is carried out on time in accordance with the highest requirements for industrial production. On the site of the plant you can see photos of the finished products. After filling out a preliminary questionnaire, you can contact the plant manager by e-mail or by phone - he will be able to assist you qualified assistance and will answer all your questions. More full information about the work of the plant and interested contacts can be found on the official website of LLC MPK Engineer.
