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SERIM MULSAN

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GRP WATER TANK

The greatest value of Serim Mulsan is presenting a joyful future for you

GRP WATER TANK

GRP Water Tank Features

GRP (Glass Reinforced Polyester) water tank features panels that have gone through a compression molding by a high-temperature, high-pressure hydraulic press, and has a heat deflection temperature greater than 200℃, while compression molding enables both insolubility and infusibility. The temperature of the water stored in a GRP water tank does not experience any deterioration (heat aging) in the material itself at room temperature.

Design in various capacities

Panels in various sizes and shapes feature structures that maximize utilization of the capacity and horizontal and vertical installation spaces, thus sufficiently satisfying customer requirements. Use of such a variety of panels enables the installation of l-shaped, c-shaped and square-shaped water tanks, as well.

Superior Sanitation

Conforming to the regulations of the Food Sanitation Act, GRP panels completely block off the light to prevent the proliferation of bacteria and various germs, while the high-temperature molding process allows for a beautiful surface and hardness that promotes a material resistant to corrosion. Also, any raw materials designated as being potentially harmful in generating endocrine disruptors are not used during GRP production, making them harmless to the human body.

Perfect Water Tightness

It possesses perfect water tightness by using special sealing materials with outstanding weatherproof properties and restitution.

Strength & Durability

Advanced GRP complex materials maintain the highest water pressure resistance thanks to high-temperature, high-pressure press molding, and the internal structures of the water tank have applied STS (stainless steel), while the external structures have been processed with hot-dip galvanization for corrosion resistance.

Outstanding Thermal Properties & Condensation Prevention

Three-layered, thermal panels (25 mm, 50 mm), equipped with GRP's own adiabaticity, retain excellent thermal properties.

Excellent Constructability & Transportability

Panels with great dimensional stability reduce the period of construction to enable convenient the transferring or relocation of materials in narrow spaces on site.

High Quality

Hi Tank pursues an optimal system through quality management with strict design standard and reliable structural stress analysis.
A critical aspect in structural analysis is the design according to safety factor at a threshold level.
Serim’s expertise lies in the design of optimal safety factor considering the expected external forcebased on the Physical properties of the GRP material after long-term use of more than 15years.
Since Hi Tank does not take account of the initial value (100%) of the GRP properties but only considers the minimum value (70%) and safety factor while designing, SERIM Hi Tank guarantees long-term durability.

GRP Degradation Process

Physical properties

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Designed external force

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Water load in the tank,
dead load,
snow load,
wind load,
live load and seismic load

Design standardsDesigned external force > Threshold level ÷ Safety factor

Item Guaranteed Load Conditions
Earthquake Horizontal seismic intensity Kh=2/3G
Hydrostatic Water Level(Height in Meters) ×
pressure 0.1kgf/cm2(0.01MPa)
Snow load 60kg/m2
Wind load Below 60m/sec
Illumination Less than 0.1%
Water temperature Cold and hot water is used up to 50℃
Best Hygienic Properties

With the use of excellent corrosion-resistant panels, the surface of the tank is uniformly smooth without any moss growth and enables long-term use as the panels inhibit the proliferation of bacteria and other various germs by perfectly blocking all the light from outside.

Materials for Reinforced Components

Inside for Liquid part Stainless Steel [STS]
for Air part Plastic or corrosion - resistant material
Outside Steel + hot galvanizing

As chlorine gas remains in the air area and this may corrupt the SUS and other metals, it is critical that anti-corrosion materials are selected.

Product with Inferior Hygienic Properties

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    When light penetrates in the tank

    Moss and microorganism grow

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    When general STS bolts are used in the air area

    Corrosion occurs due to chloride gas

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    Welded type air area of the STS tank

    Corrosion occurs due to chloride gas

Advantages of Hi-TANK GRP water tank

Hi-TANK GRP water tank uses convex type panels for the base. The convex type panel is designed that any increase in water pressure closes the bottom panels joints and the joints are sealed with a special rubber sealant. And the combination of convex type panels with a concave type drain panel ensures complete and faster drainage and the drain panel was specially designed to facilitate periodic water tank cleaning and inspection.

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Optimal structural design

With years of expertise in structure design, we provide perfect structure safety.
We performed structure analysis by the Finite Element Method to secure reliability on a reinforcement system, the strength of panels and pursue the optimal design. By inputting all possible factors such as hydrostatic pressure, seismic load, snow load, wind load, etc. We estimated the stress and distortion level. Through intensive reinforcement on the part with maximum stress, we aimed to design the best stable system.

Structure Analysis Flowchart

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Stress Analysis of the Panel(FEM)

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By modeling the entire system of the basic design, we evaluate the level of stress when inputting loads and find out the part where the maximum stress occur. With repetitive improvement of designing, we establish an optimal system of high reliability.

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Long-term Durability Test(Field test)

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Generally, there is more than one water depletion and filling up a water tank per day on the average.
Therefore, if the tank is used for 15 years, approximately 4000 times of water circulation would occur and the tank would sustain about 4000 repetitive loads.

Stress Analysis of the Panel(FEM)

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By modeling the entire system of the basic design, we evaluate the level of stress when inputting loads and find out the part where the maximum stress occur. With repetitive improvement of designing, we establish an optimal system of high reliability.

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Strain Gauge Test

Long-term Durability Test(Field test)

Generally, there is more than one water depletion and filling up a water tank per day on the average.
Therefore, if the tank is used for 15 years, approximately 4000 times of water circulation would occur and the tank would sustain about 4000 repetitive loads.
Before launching new product into the market, Hi Tank undergoes field tests to check for water leakage and other defects by applying the expected repetitive loads of water circulation to two tanks every day and night for about 6months.
Such tests make us possible to guarantee the safety and durability of Hi Tank.

SERIM HI TANK

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    01 Air-Vent(ABS)

    With PE-mesh insect-guard

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    02 Water tightness

    Maintains perfect water tightness by using sealing tape of PVC foam which is excellent for inhibiting the effects of weathering and for its restorative ability.

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    03 Outstanding Thermal Effect

    Prevents freezing and dew condensation as it demonstrates outstanding thermal effect due to the inherent thermal resistance of the GRP material and polyurethane heat-insulating materials.

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    04 Level Adjustable Foundation

    Replaces concrete foundation
    Allows to make easy and speedy construction
    Allows to adjust a very fine tolerance

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    05 External Ladder

    Aluminum

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    06 Manhole

    Convenient & close structure
    Mounted special lock

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    07 Internal Ladder

    UPVC

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    08 Lower Water-discharging Panel Structure at the Bottom Area

    Uses lowered drainage panel on the bottom so that it can collect and discharge the water.

HI TANK OFFERS

External Reinforcement System.

The External Reinforcement System refers to a system that has been designed to support stress that occurs due to the hydrostatic pressure exerted on the outer part of the tank.
The minimized use of reinforcing materials inside the tank, Hi Tank provides perfect hygiene and convenience of easy cleaning for customers.

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External Reinforcement System at 1~3mH
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    Inside at 1mH

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    Sectional view of the inside at 1mH

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    Inside at 2mH

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    Sectional view of the inside at 2mH

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    Inside at 3mH

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    Sectional view of the inside at 3mH

Characteristics
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    Can be installed in Maximum Capacity of a Same-Sized Place

    When installing tanks for different usage in a narrow space such as underground rooms and partition, it can be installed for the maximum capacity.

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    Diversification of Usage

    By installing partitions, you can use one tank for drinking and the other tank for other purposes(e.g. fire hydrant, etc.)

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    Easy Maintenance

    As two tanks are installed in one-piece, it is easy to maintain the tank. Even during cleaning, suspension of water supply can be avoided owing to use of compartments.

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    Low Price

    Compared with installing each tank for a different usage, the entire prices including installation expenses are lower.

Installation Example
  • serimmulsan Front view of the partition
  • serimmulsan Rear view of the partition

Since partition panels receive repetitive loads from both the front and back, when installing the panels that are under water pressure, we use the same designed panel that are used for the bottom panels.
Also, a compartment tank is structurally safe due to the fact that the bottom part and the ceiling part are mutually connected and fixed onto partition.

Free Capacity Design

The tank is suitable for large-sized underground reservoirs as its structure utilizes horizontal and vertical spaces at the maximum through the use of diverse sizes of panels.

Allowable height for installation of the tank Allowable capacity for installation of the tank
1.0~5.0min height 1~5,000tons
(A tank with a capacity exceeding 5,000tons may be installed through individual design)
  • serimmulsan General square type
  • serimmulsan L-shape type
  • serimmulsan Center-vacant square type
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  • serimmulsan Rectangular-shape type
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※The corner-usage type system creates maintenance space due to the fact that the tank is installed apart from the pillar, regardless of the location of the pillar.

※When installing the tank through lining-processing with FRP, if the pillar takes the role of a wall, it may cause inferiority in the structure intensity of the body and the reinforcement system.

Panel Composition

It is a base pad, comprising a rotating steel support with adjustable height and upper and lower support plates, of a systematized water tank that fixes the ends of both bases with a connecting rod.

Side Panel Composition Standards by Height

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Types and Shapes

Side panel

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Bottom panel

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Celling panel

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Drainage panel / Manhole panel

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Technical Help
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To prevent dew condensation in the water tank
To check the dew condensation in the tank, identify the difference between the inside of water temperature and the outside of tank temperature.
Draw a line vertically at the point and mark the point (A) where the line meets the curve representing the relative humidity inside the tank.
Draw an oblique line to the dew point temperature curve and mark it contact point (B).
Point (B) is the dew point temperature that dew condensation may occur.
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Occurrence of dew condensation
Dew point temperature < the temperature inside the tank : Dew condensation does not occur.
Dew point temperature > the temperature inside the tank : Dew condensation occurs.
Handling of dew condensation
It is important to lower the relative humidity in the tank.
It is important to complement the ventilation/duct system for the size of the tank.
Specifications for Hi Tank

1.Sizes of panels and locations on which they can be affixed

Category Panel Dimension Fitting Specification No. of Locations Affixed Location
Side Panel 1000x2000 up to 200A 2 Upper, lower
500x2000 up to 150A 2 Upper, lower
1000x1300 up to 125A 4 corner
500x1300 up to 125A 2 Upper, lower
1000x1000 up to 100A 4 corner
500x500 up to 300A 2 Whole face
Exclusive Panel 500x1000 up to 300A 1 Whole face

Exclusive panels for fitting (500x1000) are flat, pattern-less plates used for designing with freedom when setting the attachment height of water outlet pipes, alimentary canals, etc.

2.Type and Size of the Fittings

Socket-type

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  D D1 D2 D3
20A 55 33.5 21.4 38
25A 65 40 30.3 46
30A 79 49 39 55
40A 85 55 45 61
50A 98 66.5 56.7 72
65A 120 84 72.2 93
75A 132 97 85 105
100A 170 120 110 127

Flange-type

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  D1 D2
65A 140 175
80A 150 185
100A 175 210
125A 210 250
150A 240 280
200A 290 330
What is SERIM HI-FOUNDATION?

It is a foundation of a systemized water tank which consists of a steel support with adjustable rotary height, a top and a bottom plate and both ends are fixed as a linkage for each foundation.

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Structure Analysis Flowchart

Description Concrete Foundation Adjustable Foundation
Shape
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Pad material Plain concrete+Steel liner STS pipe +SMC
Build Moulding-concrete pouring-Curing-Mortar plaster-Curing Bolt assembling
Leveling Poor horizontality
(Non-precise standing of skid base)		 Precise horizontality
(Precise standing of skid base)
Durability(Strength) Good compression strength, but instabilities for curing, plastering & liner Standardized Uniform Quality with more than 8times safety ratio (Ready made product)
Corrosion resistance Rust on steel liner / Concrete corrosion No rust (Anti corrosion material)
Pad weight reduction / 300 places 165,600kg(100%) 3,600kg(2%)
Build time / 500 tons More than 30days Less than 3days
Structural design and stability verification

SERIM HI-FOUNDATION is a proven product that has undergone a field test for a scientific design and compressive strength test by FEM and a 7 meter high water tank.

FEM analysis result

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HI-FOUNDATION generation stress
Stiffener(Steel) 197kgf/cm2 < 1600kgf/com2
(Allowance rate 8.1 times)
Stiffener Plate(SMC) 17kgf/cm2 < 212kgf/cm2
(Design Margin 12.5 times)

Field Test

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HI-FOUNDATION generation stress Base frame strain Spec
7mh 1.25mm 10.0mm Below
Maximum deformation amount 1.25mm (8 times deformation safety)

SERIM HI-FOUNDATION Prefabricatd Structure

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  • Address : 17, Geumgeonaeam-ro Gadeok-myeon, Sangdang-gu, Cheongju-si, Chungcheongbuk-do, Republic of Korea

  • CEO : Ahn Won-ja, Go Tae-kyung
  • Tel : +82.42.822.6810
  • Fax : +82.42.822.6831
  • E-mail : serimms@serim.kr / sales@serim.kr

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