Water Proof Large, Medium, Small(Pd No. : 3078863)

(Updated : Feb/14/2017)
product information
Model Nm WPL / WPM / WPS
HS CODE 120760
M.O.Q 1
Keywords Pore sealing device, ship waterproofing equipment, ship's oil-feeding equipment, ship's pore, oil sp
Seller ID Koreaot

[Company History]

* 2014.3 Established KOT Corp.(Busan)

* 2015.2 Established the R&D department

* 2015.7 CEO Succession(Kangmin Kwon ->Kwanghyun J) 

* 2015.8 Increase Capital (50M KRW ->200M KRW)

[Company Vision]

To prevent ship sinking and marine pollution caused by damages of seawater inflow and oil spill due to sea/submarine warfare and collision between ships, we have been developing waterproofing/oiling equipment for ships, vessels, and marine facilities and also pioneering export of seaports and overseas exports for the last several years. In the future, we will show the new technology that extends to the world as well as the domestic market, and take charge of the marine waterproofing/oil storage and the salvage of the sinking vessel.

[Representative Business Model]

Water Proof Large/Medium/Small(By Size)

[Product Description]

The main purpose of this product is to prevent the sinking of the ship by preventing the inflow of seawater by emergency when attached to the outside of the hull when the hull of the ship is broken. It is a device that can prevent or reduce the marine pollution caused by the leakage of the ship when the ship pierces at sea.

[Product Features]

*Model: WPL, Size: W381*L293*T15MM

*Model: WPM, Size: W657*L431*T15MM

*Model: WPS, Size: W933*L638*T15MM

4-1) Pore blocking coverage criteria

4-1-1) The containment range of each device is based on when it is capable of blocking more than 95% of the pore area.

4-1-2) The criterion for the size of the pores to be sealed by each MODEL shall be less than 100mm in size(dimension) of INSIDE GASKETS.

(50mm inward from the edge of the INSIDE GASKETS)

4-2) Pore blocking coverage for each model

The containment range of each device is based on its ability to block over 98% of the pore area.

4-2-1) LSS DLM: 430mm × 230mm Pore size ¢ 100mm Reference depth 10m

- Pore size ¢ 100mm Reference depth 10m, (Based on KOMERI test report)

- Pore size ¢ 200mm Standard depth 5m, (Based on KOMERI test report)

※ Depth of water in above application range can be increased or decreased by production according to required application water depth.

(Currently, the improvement is available with the pore size of ¢ 200mm and depth of 10m)

5. Structure

(2) MAGNET in Fig. 1 (1) is mounted on the rim of the main body by using a stainless steel plate (stainless steel) which is flexible enough to be resistant to tearing, And a gasket made of resin such as rubber having high elasticity is joined to the inside and the outside of the magnet to perform a function of sealing in a double manner.

6. Design and production standards

6-1) Body: Stainless steel (STS301 of KS standard KSD3698)

By selecting a material having a high tensile strength and a low hardness (HB value and HR value), it is possible to increase the response and resilience to the shape (curved surface).

- Tensile strength: 500Kg / or more

- Hardness: HB 207 or less, HR 95 or less

6-2) Magnetic: It is designed / manufactured with the high magnetic force to maintain high attraction force while reducing volume and weight.

- Material: ND-Fe-B Magnet N-35

- Br: ≥1170

- bHc: ≥836KA / m

- iHc: ≥955KA / m

- (BH): ≥263 KJ / m3

- Holding Power: ≥20Kgf / ea

6-3) Gaskets: Resins such as rubber and polyurethane which are flexible and highly elastic are used so as to be able to cope with the shape (curved surface) or bumps. 

- Inside Gaskets: Polyurethane DSE-180P (Dongseo Chemical)

- Hardness: 82 ± 2 Shore A

- Tensile strength: 330 ± 70 Kgf /

- Elongation rate: 500 ± 50%

- Repulsive elasticity: 60 ± 5%

- Adhesion strength with stainless steel: ≥ 50Kgf /

- Outside Gaskets: NBR Rubber

- Hardness: 35 ± 5 Shore A

- Tensile strength: 80 ± 30 Kgf /

- Elongation rate: 300 ± 50%

6-4) The combination of body (stainless steel) and inside gasket should be made by using hot pressing method or molding method to prevent the resin from being separated even at 2Kgf (20m depth) Insert.

- Bond tensile strength: ≥ 5 Kgf /

7. Function and performance of each element

7-1) Body (Body)

The stainless steel plate applied to the body can cope with the sharp part of the hull metal which may protrude when the hull is crushed, without damaging the equipment, and has excellent flexibility and resilience, so that it is highly responsive to the curved surface of the hull. It is also a material that can be long-term stored and used without damaging its function because of its excellent salt resistance and corrosion resistance. (No coating, external exposure)

7-2) Permanent magnet

Permanent magnets assembled on the rim of the device function to keep the resin-like elastic material attached to the outside and inside of the magnet to prevent seawater inflow and outflow of the load without detaching the device attached to the hull. The characteristic of the permanent magnet that the magnetic force is lost in a general preservation state in which the permanent magnet is not influenced by an external magnetic field is referred to as "aging", and the aging is generally 0.5% attenuation in three years. Considering the deterioration of the resin system, the reduction in magnetic force is less than 1% when the lifetime of the device is taken as 10 years. As a result, it can be confirmed that such reduction of the magnetic force is no problem for using the device. The magnets are composed of an optimal magnetic circuit composed of a permanent rare earth permanent magnet combined with a magnetic iron [refer to (5) MAGNET single item in Fig. 1]. Thereby achieving the desired purpose. (The condition of meeting the requirements of Clause 1, Clause 2 and Clause 3 of KOMERI Test Report)

Such magnetic circuit selection can prevent the magnetic field of the piercing block device from affecting the navigation device by blocking magnetic field leakage in other directions.

(Meeting the requirements of Clause 5 of the KOMERI Test Report)

In addition, in order to improve the salt resistance and acid resistance of the magnet, rubber is applied to the outside of all the magnetic force generating elements containing iron by insert-type hot pressing to improve the preservability and durability of the device, to prevent sparks that may have occurred due to the tearing of the surface.

(Meeting the requirements of paragraph 4 of the KOMERI Test Report)

In order to construct an efficient magnetic circuit, the body is fastened with SUS BOLTS together with a separate OUTSIDE GASKET, which is made by extruding magnets with adhesive and rubber coating by hot pressing method. The coupling between INSIDE GASKET and main body improves the fastening force by combining liquid resin by using molding technique. (See the sectional view of the drawing)

7-3) Sealing

Gaskets made of highly elastic resin such as rubber or urethane are assembled to the outside and inside of the magnet close to the magnets to perform the sealing function in duplicate. Outside Gaskets performs sealing function at low water pressure less than 1m or depth of water. When pressure of more than 1m depth and water pressure of 0.01Mpa or more is applied, Gaskets inside the magnet integrated with stainless steel plate is closely attached to the hull outer wall And the function of sealing up to the pore at 10 m (water pressure 0.1 MPa) is smoothly carried out. (Containment efficiency of 98% or more)

(Meeting the requirements of Clause 6 of the KOMERI Test Report)

7-4) Ease of use.

In order to perform the function of the pore blocking well, the adhesion of the magnet to the hull is more than a certain level

. It is natural that the strong adhesive force makes detachment difficult. It may happen that the mounting position is to be changed in the course of taking emergency measures. In this case, if it becomes difficult to detach the wrongly attached device, the device may not fulfill its role as emergency equipment. In order to solve this problem, it is another advantage of this device that it is equipped with a handle applied with the principle of lever, and it is improved to almost no inconvenience to the detachment of equipment while using strong permanent magnet.

8. Validity of test certification

8-1) Desorption test during sailing (Clause 1, KOMERI test report)

The function of sealing the inflow of seawater and the outflow of the load on the wave of the hull is essential for the attraction of the device to the hull. In the case of naval and coastguard vessels, if there is a pore during the engagement, the meaning of the pore blocking device will be maximized when the operation can be carried out even after the emergency containment.

As a result of the verification, we confirmed the detachment of the device after attaching the device, and obtained the same result as the attached report.

8-2) Hydrostatic test (Clause 2, KOMERI test report)

The hydrostatic test is a test to determine how deep the hull depth is to prevent seawater from entering the hull.

When the pressure at a depth of 1m is set at 0.01 MPa ¢ For a 100mm pore,

it is confirmed that the pore can be blocked.

8-3) Attachment test (Clause 3, KOMERI test report)

It is the verification data that the equipment is normally attached easily.

8-4) Electrostatic (spark) test (Clause 4, KOMERI Test report)

This is the verification data against the danger of explosion around the hull where the device is to be installed due to the leakage of the load during the hull piercing. The strong magnet of the device is attracted by the strong self collision with the energy of the magnet itself when it comes close to the metal hull. It is a verification test to check whether a collision spark that may occur at the time.

The collision suppressed by the elasticity of the paint applied to the hull and the rubber applied to the magnet,


8-5) Magnetic field test (Clause 5, KOMERI Test Report)

Magnetic fields above a certain limit can distort the flow of radio waves or radio waves through the magnetic field.

This information is used to check the influence of the magnetic field of the permanent magnet combined with the device on the ship's navigation system when the ship piercing device is stored on the ship or attached to the ship. As a result of the test, it is confirmed that the range of the magnetic field is within 500mm of the apparatus and there is no problem in use.

(Refer also to the fact that the permanent magnet related cargo is loaded on the ship and frequently transported)

8-6) Pore blocking test on water depth (Clause 6, KOMERI test report)

Some experts have questioned the effectiveness of its use at deep water depths in the presentation and demonstration of the pore blocking device.

This is due to the reasoning that it may be difficult to attach or detach the device by the water pressure of the seawater flowing into the ship through the pore area, or it may cause danger to the operator. The test results confirm that there are no problems, and the logical basis for them is as follows.

※ In case of pore of ¢ 200 at depth of 10 m

The outlet pressure is the outlet pressure per unit area; 0.1 MPa 1 Kg / , and the oil output acting on the wave at this time becomes 10 × 10 × 3.14 × 1 = 314 Kgf, which is very powerful force. However, in the case of inflow pressure, the area (waterway, channel) in which the sea water flows (inflow channel) reaches infinity even if it deviates only 100 mm from the pore position.

Therefore, since the pressure is 314 kg ÷ ∞ (infinity), the pressure at the position is greater than the depth pressure (1 kg / cm 2)

There is no swirl. The test results confirm that there is no abnormality in the logical basis.

9. Packing and Storage

9-1) This device is a stockpile (concept like a fire extinguisher) to prepare for emergency disasters. Considering that it is a device that can be stored on ship or on land for very long time, It should be stored in a sealed and airtight container.

9-2) Permanent magnet installed in the device may be sensitive to high temperature and may lose its magnetic force. Therefore, it should be stored at room temperature below 60 ℃ when it is stored. When approaching near firearm, disassemble the package and change the state of magnetic force After confirming, if there is no abnormality, reseal and store.

9-3) When packaging and storing, steel plate of more than 0.5t should be attached to the magnetic force generating part of the device to prevent the deformation of the device and to suppress leakage of the magnetic field.

9-4) The use of the device is to be replaced after one use in consideration of durability due to oxidation or corrosion. If you want to store it for reuse, clean it thoroughly with fresh water to remove salt, dry it completely at room temperature below 60 ℃, seal it with a plastic bag again and keep it in a closed container.

[Other Video]

-  https://youtu.be/cU7QwPNQRK4

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Company Information

company information
Contact Person
Homepage www.koreaot.co.kr , http://seller.buykorea.org/korea-ocean-tec--EC121636
Tel 051-959-8800 Fax
Biz. Type Est. Year
Employees Annual Export USD 0~1 mn
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