Basic knowledge of storage tank:

Use, storage tank:

Used for steel container for storing liquid or gas seal for steel storage tank, steel storage tank project is essential industries of petroleum, chemical, oil, food, fire, transportation, metallurgy, national defense, critical infrastructure, our economic life always cannot do without steel storage tanks of large and small, an important role steel of the tank in the development of the national economy is irreplaceable. Steel storage tank is the storage of various liquid (or gas) special equipment for raw materials and products, for many enterprises no storage tank can not be normal production, especially the storage state strategic material reserves cannot do without the capacity of various types and. Storage facilities in China to aboveground storage tanks, and the majority of metal structure, the website will introduce commonly used in domestic dome tank, inner floating roof tank and horizontal tank foundation knowledge.

Two, storage tank:

As the storage medium, the tank is a wide variety of forms.

According to the position of classification: can be divided into aboveground storage tanks, underground storage tanks, half underground storage tank, tank, storage tank, sea sea.

According to oil classification: can be divided into the oil tank, fuel oil tank, lubricating oil tank, oil tank, fire water tank and other edible.

Classified according to purpose: can be divided into the production of oil tank, storage tank.

According to the form of classification: can be divided into vertical, horizontal storage tank, storage tank.

Classification: according to the structure can be divided into fixed roof tank, floating roof tank, the spherical tank, etc..

Size classification: more than 100m3 for large storage tank, for vertical storage tank; 100m below 3 for small tanks, for horizontal storage tank.

Three, storage tank standards:

Commonly used storage standard: 1 American Petroleum Institute standard API650; 2 British standard BS2654; 3 Japanese standard JISB8501; 4 German standard DIN4119; 5 petroleum industry standard SYJ1016-82; 6 petrochemical industry standard SH3046-92.

Four, the material storage tank:

Tank engineering materials required for the materials and ancillary facilities material. The material according to the tensile yield strength (in s) or tensile strength (c b) standard for low strength steel and high strength steel, high strength steel for 5000m more than 3 tanks; ancillary facilities (including wind ring, locking, ladder, guardrail etc.) are used in ordinary carbon structural steel with lower intensity, the rest accessories, accessories according to the different uses of other materials. Manufacturing the commonly used in domestic steel 20, 20R, 16Mn, 16MnR and Q235 series etc..

Five, the structure of tank:

At present our country used most widely, the most mature technology is the production and installation of dome tank, floating roof tank and horizontal tank.

(a) tectonic dome tank.

Dome tank is a tank top, tank spherical crown to a steel cylindrical container. Dome tank has the advantages of simple manufacture, low cost, and so on many domestic and foreign industry is most widely used, the most commonly used for volume 1000 -10000m 3, at present, the maximum volume of domestic dome tank has reached 30000m 3.

The bottom of the tank: tank bottom plate assembly, tank bottom plate for central middle board, surrounding the steel plate. Edge board can use strip plate, also can use the arcuate plate. In general, the tank diameter < 16.5m, should use the strip edge plate, tank diameter ≥ 16.5m, should use the bow shape edge plate.

The tank wall of tank wall plate: by ring welding and become, divided into a sleeve type and straight line type.

Sleeve type tank wall circumferential weld the overlap, the longitudinal weld butt. Dome tank by the form, the advantage is to facilitate the ring group, the inverted construction method is safe.

A linear type tank wall circumferential weld butt. The utility model is the same diameter from top to bottom in the tank wall, especially suitable for inner floating roof tank, but the demand of installation is high, the difficulty is greater.

The top of the tank: a tank top with a plurality of fan-shaped plate of welded ball coronal, the internal side of the tank top with steel bar reinforcement, between all the sector plate lap weld, angle steel ring the whole tank top and the upper part of the tank wall panel (or lock) welded into one.

(two) structure of floating roof tank

Floating roof tank is composed of a floating in the medium on the surface of the floating roof and vertical cylindrical tank wall. Floating roof tank reserves with medium increases or decreases lift, a ring seal between the floating roof edge and the tank wall, the medium in the tank is always internal floating roof cover, reduce medium volatile.

The bottom of the tank: volume of floating roof tank is large, the floor with arched edge plate.

The tank wall: the linear tank wall, butt weld should be polished smooth, ensure the inner surface roughness. Floating roof tank is open, for increasing the wall stiffness, should according to the local wind load size, the tank wall top set the wind beam and reinforcing ring.

Floating roof: floating roof is divided into single deck floating roof, double deck floating roof and float type floating roof form.

Single deck floating roof: consists of several separate compartments to form an annular floating ring, the inside is a single plate roof. Single disc is provided with a plurality of annular steel roof bottom reinforcement. Its advantages are low cost, good repair.

Double deck floating roof: composed of upper plate, lower plate and the edge plate, the radial baffle and the baffle into several independent annular tank. Its advantages are large buoyancy, good drainage effect.

(three) structure of the inner floating roof tank

Inner floating roof tank is in the dome tank with floating roof and tank, additional floating roof can reduce the volatilization loss medium, outside the vault can also prevent rain, snow and dust from entering the tank, ensure the medium tank clean. This tank is mainly used for storage of light oils, such as gasoline, aviation kerosene. The straight wall of inner floating roof tank, wall plate butt welding system, according to the requirements of the production of vault vaulted tank. The inner floating domestic top two structures: one is the steel floating and floating roof tank top; another is the shape of the aluminum floating roof assembly.

(four) volume structure for horizontal tank

 horizontal tank is generally less than 100m3, usually used for production or gas station. Horizontal storage tank circumferential weld the overlap, the longitudinal weld the butt. Ring plate are arranged alternately, the singular, that cover the same diameter. Horizontal storage tank end cover is divided into a flat end cover and dished end cover, flat cover horizontal storage tank can bear 40kPa pressure, dished end cover horizontal storage tank can bear 0.2Mpa pressure. The underground horizontal tanks must ring stiffener, strengthening angle simmer crafted.