COPYRIGHT© 2009~2011 DONGSIN EF ALL RIGHTS RESERVED.

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DONGSIN EF

GREETING

Welcome to DONGSIN EF

DONGSIN EF was established in July 2009. We product and supply high quality METAL EXPANSION JOINT,

FLEXIBLE HOSE and RUBBER EXPANSION JOINT for offshore & ship buildings.

Industry facilities and plants. In Nov 2009, we obtained certificate of Authenticity about RUBBER EXPANSION

JOINT from DUPONT in U.S.A for the first time in Korea.

In May 2010, we also got patent of EXPANSION JOINT, SILICONE JOINT which can stand under movement and

MISS ARRANGEMENT and Fire-Resistant RUBBER EXPANSION JOINT.

DONGSIN EF guarantees that we do not rely on imported products and we supply competitive product based on

Excellent quality and technique.

President Hwa-Jin, Oh

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OVERVIEW

Company Name DONGSIN EF Co.

President Hwa-Jin, Oh

Established Date July 25, 2009

Head Office #205 Hwaseong B/D, 482-8 Mangwon-dong,

Mapo-Gu, Seoul, Korea

TEL 02-6082-6166

FAX 02-6082-6177

Factory Location 44-6 Seokjeong-ri, Daegot-myeon,

Gimpo-si, Gyeonggy-do, Korea

TEL 070-8280-7485~6

DONGSIN EF

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FactorySize

(Square meter) Main Product

Gimpo-si 500

METAL / NON-METAL EXPANSION JOINTRUBBER EXPANSION JOINT

METAL FLEXIBLE HOSE

HISTORY

DONGSIN EF

Since 2009 ~

200907 Establishment of DONGSIN EF co. 11 Obtained ISO11 Acquired Quality Management

System ISO9001Certificate of qualification aboutRubber Expansion Joint from Dupont

12 Signed up supplier forSamsung Heavy Industries

201003 Signed up for Samsung Engineering

and Lotte Construction06 Signed up supplier for ENTOB

- Supplied EXPANSION JOINT to POSCO10 Obtained patent

- Fire-Resistant Rubber Expansion Joint- Low Vibration Silicon Expansion Joint

201101 Signed up for UAE TAKREER02 Obtained ISO 1400103 Signed up for GS Construction04 Supplied HONAM Petrochemical

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DONGSIN EF

ORGNIZED

PRESIDENT

MANAGEMENT PRODUCT QUALITY

SALES

GENERAL AFFAIRS

PRODUCT

DESIGN

INSPECT

SERVICE

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DONGSIN EF

PRODUCT

MAIN PRODUCTS

PLANT SHIP BUILDING

Metal Expansion Joint RUBBER Expansion JointMetal Flexible HoseQuick Coupling Hose Non-Metal Expansion JointSilicone Expansion Joint

Chemical Pipe Acid Pipe Steam PipeLiquid Pipe Gas Pipe High pressure Pipe

Drill Ship General ShipBattle ship

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DONGSIN EF

PRODUCT

Applications : Chemical Pipe and Acid Pipe

Material : Inside Teflon / Outside Steel(SUS304,316L)

Inside Teflon(VITON) / Middle(SILICA) / Outside Rubber(SILICONE)

Manufacturing Size : 2” ~ 20”

Pressure Range : Full Vacuum ~ 10 kg/㎠

TEFRON LINED EXPANSION JOINT SILICONE EXPANSION JOINT

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DONGSIN EF

PRODUCT

HIGH PRESSURE EXPANSION JOINT

Applications : Steam Pipe, Liquid Pipe, High Pressure Gas Pipe, etc.

Material : SUS304, SUS304L, SUS316, SUS31 6L, SUS321, etc.

Manufacturing Size : 2” ~ 20”

Pressure Range : 10 ~ 80 kg/㎠

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DONGSIN EF

PRODUCT

NON-METAL EXPANSION JOINT

Applications : Desulfurizer, Crematory, Steel Mill, Power Plant

Material : Non-Metal

Manufacturing Size : 2” ~ 70”

Pressure Range : 1~ 2 kg/㎠

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DONGSIN EF

PRODUCT

EXHAUST GAS LINES

Applications : Exhaust Pipe, Drainage Duct Line, etc.

Material : SUS304, SUS316L

Manufacturing Size : 2” ~ 78”

Pressure Range : 1 ~ 5 kg/㎠

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DONGSIN EF

PRODUCT

RUBBER EXPANSION JOINT METAL FLEXIBLE HOSE

Applications : Liquid Pipe, Gas Pipe, etc.

Material : VITON, EPDM, CR

Manufacturing Size : 2” ~ 70”

Pressure Range : 1 ~ 250 kg/㎠

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DONGSIN EF

QC WORK FLOW

PRESENT

All products quality in DONGSIN EF

are inspected and checked through

3 steps which are manufacturing

Processing and next step.

1 Step(Imports and Test)

- Inspection when we import

commodities.

(Use standard regulation)

- Approve suitability by filling

in DONGSIN EF Mill sheet2 Step(Inspection and

Test for Processing)

Processing Inspection by

using standard regulation

• Dimension Inspection

• Painting Inspection

• Welding Inspection

• Pressure Test3 Step(Final Inspection

and Test)

Result for final Inspection

and filling Inspection

Report Out.

When customers request for

Dimension Mill Sheet,

Treatment cert(Sub-vendor cert)

and submit External Inspection

Agency Sheet(Sub-vendor cert)

to customers.

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DONGSIN EF

EQUIPMENT

설비 명 규격 및 사양 수량

ROLL Machine 1,220L 1

ROLL Machine 1,220L 1

ROLL Machine 150A~5000A 1

Electric Welder AC Arc 5

Compressor 50 Bar 2

HOIST Crain 4 Ton 1

HOIST Crain 1 Ton 1

CO² Weding Machine 500A 4

CO2 Auto-Welding Machine 650A 1

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DONGSIN EF

EQUIPMENT

설비 명 규격 및 사양 수량

Steam Boiler 5kg 1

BOILER 1500 × 2500L 1

PRESS 300 Ton 1

PRESS 500 Ton 1

RADA 1000A 1

MOLD 2” ~ 18” Each 1SET

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BUSINESS RELATIONSHIP

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CERTIFICATE

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DONGSIN EF

CERTIFICATE

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DONGSIN EF

CERTIFICATE

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