Steel Pipes Tubes

CONTENTS

02 Company Profile & Brief History

04 Dongbu Steel factory

06 Manufacturing Process

08 Standard Chart

12 ERW Steel Pipes

14 SPIRAL Welded Steel Pipes

16 Carbon steel pipes for general structural purposes

18 Steel Pipes Piles

24 Steel pipe Sheet Piles

30 API

36 Roll Bending Steel Pipes

38 Applications

40 Approved & Authorized specifications

STEEL PIPES & TUBESSTEEL PIPES & TUBES

Dongbu Steel Pipes & Tubes

History

1958. 08Established in Yang-pyung dong,Seoul, Korea

1961. 07Steel Tube started

1973. 03Completion of Welded LightH-Beam Plant

1978. 08Completion of ERW Steel PipePlant

1982. 10Official corporate name changefrom IL-SHIN Steel Co. to DongjinSteel Co. official corporatename change from Dong-jin SteelCo. to Dongbu Steel

1985. 01Technology Research Centerestablished

1991. 09Spiral Steel Pipe Pipe Workscompleted

1994. 10Pre-Engineered Buildingsystem(PEB)started

1995. 06Operation of ERW STS steel pipesdeveloped

1995. 07PEB Works begins

As the pioneer to introduce steel pipes to Korea in 1958, Dongbu Steel has become one of Korea's leading steel makers. Our

track record will show that the company's success is the result of using only state-of-the-art equipment; possessing a wealth

of industry know-how; and maintaining a high level of technical expertise.

Our priorities are simple. Dongbu Steel is wholly customer-oriented. We are devoted to continuously developing new technology

that exceeds our clients' expectations. Because our customers come first, we understand the importance of listening and responding.

We regularly conduct customer satisfaction surveys and quality assessments.

Recognized as a leading blue-chip company in the steel industry, our investors are guaranteed high value-added ROI. Through

pro-active management reform, our employees enjoy a workplace that emphasizes open communication and professional

development. We are committed to protecting the environment, strictly adhering to green management policies.

Our vision is clear. In the 21st century, Dongbu Steel will become the leading steel product provider. To do this, we will

continue to build our three core areas - client satisfaction through product diversification; technological innovation to ensure

high value-added profitability; and the globalization of our workforce through extensive international management training.

It is our sincere hope that you will browse through the pages of Dongbu Steel's website and learn about the valuable role our

company plays as a leader in the world's steel industry.

DONGBU STEEL WILL MAKE IT COME TRUE

Digital revolution and biotechnology cannot exist

without core materials. With our innovative steel technology and

new materials, we seek to build lives of abundance.

We will be the world’s leading provider of comprehensive materials.

Our goal is to invest into research and development to ensure

hign returns for our valued investors.

We are part of your life-nowand in the future

2000. 12$500 million invested into Export Tower

2001. 126 Sigma launched

2002. 08ISO 9001,QS9000,ISO/TS16949Quality Certification acuired

2004. 02Incheon Works Steel Gallery opened

2005. 09$900 million invested into Export Tower

2006. 07CRM Launched

2007. 01Established "Steel Academy"

2008. 03ERW, SPIRAL NDT Inspection FacilityRationalization Completed

2 3

Incheon Works

Dongbu Steel

Pipe & Steel Structure

Carbon steel pipes for

general structural purposes

Steel Pipes Piles

Dongbu Steel factory

Manufacturing Process

Available Size Main Products

Steel pipe Sheet Piles

API

Roll Bending Steel Pipes

High strength Steel Pipes for Bracing

Applications

Approved & Authorized specifications

Standard Chart

ERW Steel Pipes

SPIRAL Welded Steel Pipes

Incheon Works ( 2,320,000Ton/Year )

- Pipe (240,000)

- Pre-coated Metal (490,000)

- Galvanized Steel (640,000)

- Tin Flate (190,000)

- Cold Rolled Steel (700,000)

- H-Beam (60,000)

The Incheon Works division of Dongbu Steel recognizes the importance of Protecting our environment and the

safety precautions that have to be taken. As a result, Incheon Works was first steel works to receive honors as

an Environment-friendly factory in Korea. In addition to promoting environment-Friendly and safe operations,

Incheon Works acquired the ISO 14001 and KOSHA 2000 program certificates.

Incheon Works is a comfortable and secure green factory that contributes to the local community.

4 5

Main Products

Steel pipes forordinary piping

Arc Welded Steel Pipe

Steel pipes forpressure service

Steel pipes for Fuel Gas Piping

Steel pipes for general

Steel Pipe Piles

Steel pipe sheet piles

Line pipeCasing and Tubing

Spec. No.Classification Application

KS D 3507, JIS G 3452, ASTM A135 GrA,ASTM A54 ArA, BS 1387

KS D 3583

KS D 3562, JIS G 3454,ASTM A53 GrB, ASTM A135 GrB

KS D 3631

KS D 3566, JIS G 3444,

ASTM A500, BS 1775

KS F 4602, JIS A 5525, ASTM A252

KS F 4605, JIS A 5530

API 5L

API 5CT

Water supply and sewage, industrial water, irrigation,oil & gas supply, sprinkler,fire hydrant, ship piping etc.

Water service pipe, Polypropylene/FBE coated pipe

For pressure service at temperature not exceeding 350˚C

Fuel and gas piping

Building, bridge, harbor, steel tower, electric light post,scaffold, etc.

building piers, banks, estuaries, civil engineering projects(building bridges, roads, rail roads, and soil sheet piles),foundations for heavy machines and furnaces. More recentapplications include man-made islands, petroleum and LNG storage sites, marine airports, fish husbandry.

Oil or natural gas piping

Oil well casing and tubing

Available Size


22212019181716151413121110987654321

Thickness

22212019181716151413121110987654321

Thickness

1,016 1,066.8 1,100 1,117.6 1,200 1,219.2 1,300 1,320.8 1,400 1,422.4 1,500 1,524 1,600 1,625.6 1,700.0 1,727.0 1,800.0 1,828.0 1,900.0 1,930.4 2,000.0 2,032 2,100 2,133.6 2,200 2,235.2 2,300 2,336.8 2,400 2,438.4 2,500 2,540 2,600 2,641.6

SPIRAL

Forming

Welding

Uncoiler

Cross WelderEdge Milling

Welder

Cut-off M/C

NDT. Hydrostatic testing & Expanding

Sizing Mill

Cut-off M/C

Ultra Sonic Test

Hydrostatic testing & E/F

Uncoiler

ERW Steel Pipes(Outside diameter) 13.8mm~508mm

ERW

Spiral welded Steel Pipes(Outside diameter) 406.4mm~2641.6mm

SPIRAL

Dongbu Steel


89.1 101.6 114.313.8 50.8 76.2

E.R.W

E.R.W

SPIRAL

SPIRAL

133 165.2 216.5 267.4 318.5 355.6 406.4 457.2 508.0 558.8 600.0 609.6 700.0 711.2 800.0 812.8 900.0 914.4 1000.0



Steel Pipes Piles





API



Applications


Standard Chart

ERW Steel Pipes


Classification

ERW

SPIRAL NO.1

SPIRAL NO.2

Outside diameter(mm)

13.8 ~ 508

406.4 ~ 2438.4

609.6 ~ 2641.6

Thickness(mm)

0.8 - 14.5

6 - 22

6 - 22

6 7

Standard Specification Application

Carbon SteelPipes

for GeneralStructuralPurposes

Steel Pipe Piles

Steel pipe sheetpiles

Chemical Composition

KS D 3566

JIS G 3444

KS F 4602

JIS A 5525

KS F 4605

JIS A 5530

STK 290

STK 400

STK 500

STK 490

STK 540

SKK 400

SKK 490

STKT 590

SKY400

SKT490

SPP

SPPS 38

SPPS 42

SPW 400

SPPG

-

0.25

0.30

0.25

0.3

-

0.35

0.35

-

0.35

-

0.30 ~ 0.90

0.30 ~ 1.00

-

0.95

0.040

0.040

0.040

0.040

0.4

0.040

0.040

0.040

0.040

0.035

-

-

-

-

-

KS D 3507JIS G 3452

KS D 3562JIS G 3454

KS D 3583

KS D 3631

C

(Max)

-

0.25

0.30

0.18

0.23

0.25

0.18

0.12

0.25

0.18

-

-

0.35

0.55

0.55

-

0.55

0.40

-

0.55

-

-

0.30 ~ 1.00

1.50

1.50

-

1.50

2.00

-

1.50

0.050

0.040

0.040

0.040

0.040

0.040

0.040

0.030

0.040

0.040

0.050

0.040

0.040

0.040

0.040

0.040

0.040

0.030

0.040

0.040

30kg/

41kg/

51kg/

50kg/

55kg/

41kg/

50kg/

60kg/

41kg/

50kg/

0.03

0.03

0.03

0.03

0.03

0.03

0.03

0.03

0.03

0.03

0.03

0.03

0.03

0.03

0.03

0.03

0.03

0.03

0.90

1.20

1.30

1.40

1.40

1.40

1.40

1.45

1.65

-

-

-

-

-

-

-

-

-

0.22

0.26

0.26

0.26

0.26

0.26

0.26

0.26

0.26

A

B

X42

X46

X52

X56

X60

X65

X70

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

0.15

-

-

Si

(Max)

Mn

(Max)

P

(Max)

S

(Max)

Nb+V

(Max)

Carbon Steel Sheetfor Ordinary Piping

Carbon SteelPipes

for PressureService

Arc Welded SteelPipes

Fuel Gas Piping

API 5L Line Pipe

Physical Requirement

Tensile

Strength

(Min)

Elongation, Min(%)

Specimen(%)

Other Tests

and

Inspections

48,000psi

33.7kg/

60,000psi

42.2kg/

60,000psi

42.2kg/

63,000psi

44.3kg/

66,000psi

46.4kg/

71,000psi

49.9kg/

75,000psi

52.7kg/

77,000psi

54.1kg/

82,000psi

57.7kg/

e = 62,500 x

(A 0.2 ÷ U 0.9)

-

-

-

-

(Non-destructivetest )Each pipe shall beinspected byultrasonic orelectromagneticmethods.(Heat treatment)Weld seam shall beheat treated afterwelding to aminimumtemperature of1000 ° F (538 Г), orprocessedin such a mannerthat no untemperedmartensiteremains.

Weld Portion:

H = 2/3D

The Other Side of

Weld portion:

H = 1/3D

The test shall be

made alternately

with

the weld at 0 deg.

And at 90 deg.

From the line

of direction of

force.

H = Distance

between Exterior

Surfaces

Flattening

H = 2/3D

-

H = 2/3D

Weld portion:H=2/3D

The other sides ofweld protion

:H=1/3D

H = 2/3D

H = 2/3D

H = 7/8D

H = 7/8D

H = 7/8D

H = 2/3D

H = 7/8D

H = 3/4D

H = 2/3D

H = 7/8D

90°x6D

90°x6D

90°x6D

90°x6D

90°x6D

-

-

-

-

-

30

23

15

23

20

23

23

20

23

23

25

18

10

19

16

18

18

16

18

18

(Angle of

Bend)

(Inner

Bend Test

90°x6D

90°x6D

-

90°x6D

Specified respectively in size

and grade.

P = D/2St except that test

pressure shall be limited to

2500 psi for size 3 1/2 in. and

smaller, and to 2800 psi for

size larger than 3 1/2 in.

S = Grade A: 18,000 (Standrad),

22,500(Alternative)

Grade B: 21,000(Standrad),

26,250(Alternative)

Specified respectively in size and

grade.

P = 2St/D , or 3,000 ,

Whichever is the smaller,

P = Test Pressure(psi)

S= Allowable Fiber Stress(psi)

t or a = Wall Thickness

Hydrostatic Test

P = 25

P = 25

P = 25 OR NDT

-

-

-

-

-

-

-

-

-

-

-

-

30

30

25

15 - 18

30

30kg/

38kg/

42kg/

41kg/

21kg/

24kg/

36kg/

32kg/

40kg/

24kg/

32kg/

45kg/

24kg/

32kg/

30,000psi

21.1kg/

35,000psi

24.6kg/

42,000psi

29.5kg/

46,000psi

32.3kg/

52,000psi

39.6kg/

56,000psi

39.2kg/

60,000psi

42.2kg/

65,000psi

45.7kg/

70,000psi

49.2kg/

-

22kg/

25kg/

23kg/

34kg/

25

25

20

18

25

SCH.No

Test pressure

OR NDT

Unit=kgf/

No.11, No.12 Longitudinal Direction

No.5 Transverse Direction

Standard Chart

Dongbu Steel


standard Alternative0.60 x Y.P.0.75 x Y.P.0.85 x Y.P.0.90 x Y.P.

O75 x Y.P.---

41/2 and under65/8 and 85/8103/4 to 1820 and over

D

S

Yield

Strength

(Min)

e= Min. elongation in 2 in.

in percent rounded to

nearest 1/2%

A : Cross sectional area

on the tensile test

specimen(in.2 )

U : Specifies tensile

strength(psi)

*6

(Non-

destructive

test )*7(heattreatment)



Steel Pipes Piles





API



Applications


Standard Chart

ERW Steel Pipes


8 9

Physical Requirement

Yield

Strength

(Min)

Elongation, Min(%)

Specimen(%)

Other Tests

and

inspections

30,000psi

21.1kg/

35,000psi

24.6kg/

30,000psi

21.1kg/

35,000psi

24.6kg/

35

56T+17.50

30

48T+15.00

25

24

22

40,000psi

28.1kg/

35,0000-80,000psi

24.6kg/

80,000-110,000psi

29.5kg/

56.2-77.3kg/

33,000psi

23.2kg/

50,000psi

29.5kg/

50,000psi

32.4kg/

25

e = 56t + 17.50

23

e = 61t = 12.00

-

H = Distance between

Exterior Surfaces

D= Outside Diameter

Flattening

D/t 16H = 0.65DD/t 16H =D/t 0.83-0.0206 D/t

D/t 16H = 0.65D3.93D/t 16H=D 0.98-0.0206D/t3.93D/t 16H=D 1.104-0.0206D/t

9 D/t 28H=D 1.074-0.0194D/t

(Angle of Bend)

(Inner Radius of Bend)

Bend Test

Apply for standard weight and extra strongpipe of NB_2" Weldportion:H=2/3DThe Other Side of Weldportion:H=1/3D The testshall be made alternately with the weld at 9 deg. And at 90 deg.

Weld Portion: H = 2/3DThe Other Side of Weldportion: H=1/3D The test shall bemade alternately with the weld at 9 deg. And at 90 deg.

Apply for NB 2"

Ungalvanized Tubes:

180° /6D

Galvanized Tubes: 90° x 8D

*7( Non-destructivetest )(Heat treatment )

(Weight of Zinc Coating

Test)

immersion in a copper

sulpate solution: 4 dips

-

Standard Specification

Chemical Composition

ASTM A53

ASTM A135

ASTM A500

BS 3601

P = Test Pressure(psi)

S= Allowable Fiber Stress(psi)

t or a = Wall Thickness

Hydrostatic Test

Apply for NB = 2"90 ° x 6DWhen ordered forclose coiling180 ° x 4D

Specified respective in size and

grade.

Note: The maximun pressure

NB 3° P = 2,500psi

NB 3° P = 2,800psi

P = 2St/D Max, 2,500psi

S : Grade A : 16,000-18,000psi

Grade B : 20,000-22,000psi

(But in no case shall the stressproduced exceed 80% of the specified yield point.)

e = 62,500 xA 0.2 ÷ U 0.9

e = 62,500 xA 0.2 ÷ U 0.9

195

215

235

Weld Portion:

H = 2/3D

The Other Side of

Weld portion:

H=1/3D

Weld Portion:

H = 0.66D

The Other Side of

Weld portion:

H = 0.33D

P = 20St/D bar

S = 80% of the Specified

Minimum Lower Yield

Strength (N/mm2)

Apply for NB _ 2"Weld Portion: H = 2/3DThe Other Side of Weld portion:H=1/3D

20 P = 53kg/-

Tensile

Strength

(Min)

60,000psi

42.2kg/

75,000psi

52.7kg/

95,000psi

66.8kg/

10,000psi

70.3kg/

48,000psi

33.7kg/

60,000psi

42.2kg/

48,000psi

33.7kg/

60,000psi

42.2kg/

45,000psi

31.6kg/

58,000psi

40.8kg/

62,000psi

43.6kg/

20-440

360-480

410-530

21.30ton/in²

66.8kg/

50,000psi

60,000psi

66,000psi

30,000psi

35,000psi

40,000psi

30 E=48t+15.00

25 E=48t+15.00

20 E=32t+10.00

- - - -

-

-

- -

P = 2St/D, or 3,000 psi,

Whichever is the smaller

S = 9 5/8 and under 0.80 x Y.P.

10 3/4 and over 0.60 x Y.P.

P = 2St/D, or 10,000 psi,

Whichever is

the smaller 0.8 x Y.P.

Application

Carbon Steel

Pipes

for Ordinary

Piping

Steel Pipe for

Conveying Liquid

Gas, or Vapor

Steel Pipe

and Tubes for

Pressure Uses

Carbon Steel

Structural Tubing

in Round

H-40

J-55

K-55

N-80

I

II

III

L

M

H

C

(Max)

Si

(Max)Others

Mn

(Max)

P

(Max)

S

(Max)

API 5CTCasing and

Tubing- -- - 0.03 0.03

A

B

0.25

0.30

-

-

-

-

0.95

1.20

0.05

0.05

0.06

0.06

ASTM A252 Steel Pipe Piles - -- - 0.050 -

BS 1387

Steel Pipe

for Ordinary

Uses

- -- - 0.060 0.060

-

-

-

A

B

C

0.26

0.26

0.23

-

-

-

-

-

1.35

0.04

0.04

0.04

0.05

0.05

0.05

ERW 320

ERW360

ERW410

0.16

0.17

0.21

-

-

-

-

0.35

0.35

0.030-0.070

0.040-0.080

0.040-1.20

0.050

0.050

0.050

0.050

0.050

0.050

A

B

0.25

0.30

-

-

-

-

0.95

1.20

0.050

0.050

0.06

0.06

Dongbu Steel


Standard Chart



Steel Pipes Piles





API



Applications


Standard Chart

ERW Steel Pipes


( Non-destructive test )(Weight of ZincCoating Test)Weight of ZincCoating.Min. 1.8 oz/ft

An alternative to the hydrostatic test,non-destructive testmay be applied(3/4"- 5",Sch. 10 )

-

*7

(Heat

treatment)

-

*7(Heat

treatment)

*1: For pipe less than 20 in. OD with any wall thickness, and for pipe 20in OD and lager with wall thickness greater than 0.375 in.

*2: For pipe 20 in OD and lager with wall thickness 0.375 in less.

*3: Either Columbium or Vanadium,Titanium or a combination thereof, shall be used at the discretion of the manufacture

*4: Either Columbium or Vanadium or a combination of both shall be used at the discretion of the manufacture

*5: Applies to casting only

*6: For piee 23/8 in. and lager in outside diameter,each pipe shall be inspected by ultrasonic or electromagnetic methods.

*7: Weld seam shall be heat-treated after welding to monimum temperature of 1000°F(538°C), or proceseed in such a mananer that no untempered martensite remains

10 11

_ Steel PipesERW

125150175200225250300350400450500

56789101214161820

139.8165.2190.7216.5241.8267.4318.5355.6406.4457.2508.0

±0.8±0.8±0.9±1.0±1.2±1.3±1.5

----

±1%±1%±1%±1%±1%±1%±1%±1%±1%±1%±1%

4.854.855.35.856.26.407.007.607.97.97.9

-12.5% max

16.119.224.230.436.041.253.865.277.687.597.4

Type of pip Outside diameter(mm)

Permissiblevariations in

thickness

Weight not including soketkg/m

Permissible variations

Taper screw pipe other pipe

Thickness(mm)

(Korean industrial standard dimensions specifications)

A B

KS D 3507(JIS G 3452) Carbon Steel Pipes for Ordinary Piping

5.1

5.5

6.4

6.4

6.4

7.9

7.9

7.9

9.5

9.5

9.5

12.7

16.9

21.7

33.1

41.2

49.3

67.7

77.6

87.5

117

129

141

203

-

-

7

7.8

8.4

9.5

9.5

11.1

12.7

12.7

14.3

-

-

-

36.1

49.9

64.2

81.1

93

122

155

171

228

-

6.6

7.1

8.2

9.3

10.3

11.1

12.7

14.3

15.1

15.9

-

-

21.7

27.7

42.1

59.2

78.3

94.3

123

156

184

213

-

-

8.1

9.3

10.3

12.7

14.3

15.1

16.7

19.0

20.6

-

-

-

26.3

35.8

52.3

79.8

107

127

16

205

248

-

-

-

(Korean industrial standard dimensions specifications)KS D 3562(JIS G 3454) Carbon Steel Pipes for Pressure Service

Type of pipedia

139.8

165.2

216.3

267.4

318.5

355.6

406.4

457.2

508.0

558.8

609.6

660.4

outsidedia

meter(mm)

-

-

-

-

-

6.4

6.4

6.4

6.4

6.4

6.4

7.9

Thick ness(mm)

-

-

-

-

-

55.1

63.1

71.1

79.2

87.2

95.2

103

W(kg/m)

Thick ness(mm)

W(kg/m)

Thick ness(mm)

W(kg/m)

Thick ness(mm)

W(kg/m)

Thick ness(mm)

W(kg/m)

9.5

11.0

12.7

15.1

17.4

19.0

21.4

23.8

26.2

-

-

-

30.5

41.8

63.8

93.9

129

158

203

254

311

-

-

-

Thick ness(mm)

W(kg/m)

Permissible variations in outside diameter

Schedule 10 Schedule 20 Schedule 30 Schedule 40 Schedule 60 Schedule 80

125

150

200

250

300

350

400

450

500

550

600

650

A

5

6

8

10

12

14

16

18

20

22

24

26

B

Dongbu Steel produces pipes of outstanding quality. Our rigorousquality control combined with 40 years of accumulated know-howand technology, are contributors behind our top-quality products.

Excellent qualityThe high-frequency electricity-resistant welding method developed by the Thermatool Group of the

United States is used in the production of our ERW pipes. Thermatool's technology renders superb

weldability to our products. Customer preference for Dongbu Steel's ERW pipes over other available

products is attributed to its wide range of applications.

In order to enhance the ductility of the welded portion Dongbu Steelapplies seam annealing, which uses a high-frequency inductionheating procedure after the welding process.

Immaculate finish on welded sections

With production equipment designed based on our extensive experience, we produce a wide range of pipes with wall thickness ranging from extremely light to heavy from 1/4" to 20" (Ø13.8~508) in outside diameter

A wide range of production capabilities

Annealer

Dongbu Steel




Steel Pipes Piles





API



Applications


Standard Chart

ERW Steel Pipes


12 13

400

450

500

550

600

650

700

750

800

850

900

1000

1100

1200

1350

1500

1650

1800

2000

16

18

20

22

24

26

28

30

32

34

36

40

44

48

54

60

66

72

80

406.4

457.2

508.0

558.8

609.6

660.4

711.2

762.0

812.8

863.6

914.4

1016.0

1117.6

1219.2

1371.6

1524.6

1676.4

1828.8

2032.0

59.2

66.8

74.3

81.8

89.3

96.8

104

63.1

71.1

79.2

87.2

95.2

103

111

119

127

135

143

69.9

78.8

87.7

96.6

105

114

123

132

141

150

77.6

87.5

97.4

107

117

127

137

147

157

167

177

196

107

118

129

140

151

162

173

183

194

216

117

129

141

152

164

176

188

200

212

236

260

283

139

152

165

178

191

204

219

230

255

281

307

150

164

178

192

206

219

233

247

275

303

331

160

175

190

205

220

235

250

265

295

324

354

399

444

171

187

203

219

235

251

266

282

314

346

378

426

473

258

275

291

324

357

390

439

488

537

587

276

293

311

346

381

466

469

521

574

627

297

316

335

373

411

448

505

562

619

675

751

312

332

352

392

432

472

532

591

631

711

791


Type Diameter

outsidediameter( )

Thickness( )

A 15.915.11413.112.711.911.110.39.58.77.97.16.46B

1. The normal diameter of the pipe shall use A or B. If there is a need for the diameter to be represented by A or B, each figure

shall be followed by A or B, respectively.

2. The calculation of weight shall be done according to the following formula, setting 1 steel at 7.85kg. Based on KS A 0021

the digits of the figure shall be cut at the third digit of the significant number.

W=0.02466(D-t) W : pipe weight(kg/m) t : thickness of the pipe(mm) D : outside diameter of the pipe(mm)

3. Other figures shall abide by the agreement made by the ordering client and the manufacturer

Type Permissible varfation% Remarks

Outside

Thickness Normal diameter 450A or lower

Normal diameter 450A or lower

-12.5

-10

15

15

±0.5margin of error is appliedto the circumference

(General pipes:permissible variations in outside diameter and thickness)Arc Welded Steel Pipes (KS D 3583)

Dongbu Steel eatablished Spiral

No.1 , No 2 each at Incheon Works in 1991 and 1996.

Spiral welded Steel Pipes with outside diameter of

16”~104” 406.4-2641.6 mm and thickness 0f 6~22

mm are manufactured by SAW (Submerged Arc

Welding) Process and have distinctive spiral pattern

on welded portion.


_ Welded Steel PipesSpiral

Cut Off Saw Welder

Dongbu Steel




Steel Pipes Piles





API



Applications


Standard Chart

ERW Steel Pipes


14 15

KS D 3566. JIS G 3444

2.0

2.0

2.3

2.3

2.3

2.5

2.3

2.5

2.8

3.2

2.3

3.2

4.0

2.8

3.2

4.0

2.8

3.2

3.2

4.0

5.0

3.2

3.5

4.5

3.6

4.0

4.5

6.0

4.5

5.0

6.0

7.1

4.5

5.3

6.0

7.0

8.24.5

5.8

6.07.08.0

8.2

6.0

6.67.0

8.0

9.0

9.36.0

6.98.0

9.0

10.3

6.4

7.9

9.0

9.5

12.0

12.7

21.7

27.2

34.0

42.7

48.6

60.5

76.3

89.1

101.6

114.3

139.8

165.2

190.7

216.3

267.4

318.5

355.6

0.972

1.24

1.41

1.80

2.29

2.48

2.63

2.84

3.16

3.58

3.30

4.52

5.57

5.08

5.77

7.13

5.96

6.78

7.76

9.63

11.9

8.77

9.58

12.2

12.1

13.4

15.0

19.8

17.8

19.8

23.6

27.3

20.7

24.2

27.3

31.7

36.9

23.530.1

31.1

36.1

41.1

42.138.7

42.4

45.051.2

57.3

59.2

46.2

53.061.3

68.7

78.3

55.1

67.7

76.981.1

102

107

1.238

1.583

1.799

2.291

2.919

3.157

3.345

3.621

4.029

4.654

4.205

5.760

7.100

6.465

7.349

9.085

7.591

8.636

9.892

12.26

15.17

11.17

12.18

15.52

15.40

17.07

19.13

25.22

22.72

25.16

30.01

35.26

26.32

30.87

34.82

40.40

47.01

29.94 38.36

39.61

46.03

52.35

53.6149.27

54.08

57.2665.19

73.06

75.41

58.91

67.5578.04

87.51

99.73

70.21

86.29

98.00103.3

129.5

136.8

0.607

1.26

1.41

2.89

5.97

6.40

8.99

9.65

10.6

11.8

17.8

23.7

28.5

43.7

49.2

59.5

70.7

79.8

120

146

177

172

187

234

357

394

438

566

734

808

952

110 X10

114 X10

133 X10

149 X10

171 X10

196 X10

168 X10213 X10

219 X10

252 X10

284 X10

291 X10421 X10

460 X10

489 X10549 X10

611 X10

629 X10

719 X10

820 X10941 X10

105 X10²

119 X10²

107 X10²

130 X10²

147 X10²155 X10²

191 X10²

201 X10²

0.560

0.930

1.03

1.70

2.80

3.00

3.70

3.97

4.36

4.86

5.90

7.84

9.41

11.5

12.9

15.6

15.9

17.9

23.6

24.8

34.9

3.02

32.7

41.0

51.1

56.3

62.7

80.9

88.9

97.8

115

134

120

139156

179

206

155

197

203

233263

269

315344

363

411

547

470452

515

591

659744

602

734

828

871

108 X10

110 X10

0.700

0.890

0.880

1.12

1.43

1.42

1.64

1.63

1.62

1.61

2.06

2.03

2.00

2.60

2.59

2.58

3.05

3.04

3.48

3.45

3.42

3.93

3.92

3.89

4.82

4.80

4.79

4.74

5.68

5.67

5.63

5.60

6.59

6.56

6.53

6.50

6.46

7.497.45

7.44

7.40

7.37

7.369.24

9.22

9.219.18

9.14

9.13

11.1

11.011.0

10.9

10.9

12.3

12.3

12.312.2

12.2

12.1

Remarks

(Korean industrial standard dimensions specifications) (Korean industrial standard dimensions specifications)

Thickness(mm)


Weight(kg/m)

Sectional Area( )

Radius of Gyration( )

Moment of Inertia( )

Section Modulus( )

9

12

16

19

9

12

16

19

9.0

12

14

9.0

12.0

14.0

16.0

19.0

22.0

9.0

12.0

16.0

19.0

22.0

9.0

12.0

14.0

16.0

9.0

12.0

14.0

16.0

19.0

22.0

9.0

12.0

14.0

16.0

9.0

12.0

14.0

16.0

19.0

22.0

9.0

12.0

14.0

16.0

19.0

22.0

12.0

14.0

16.0

19.0

22.0

12.0

14.0

16.0

19.0

22.0

406.4

457.2

500

508.0

558.8

600

609.6

700

711.2

812.8

914.4

1016.0

88.2

117

154

182

99.5

132

174

205

109

144

168

111

147

171

194

229

264

122

162

214

253

291

131

174

202

230

133

177

206

234

277

319

153

204

237

270

156

207

241

274

324

374

178

237

276

314

372

429

267

311

354

420

484

297

346

395

467

539

112.4

148.7

196.2

231.2

126.7

167.8

221.8

261.6

138.8

184

213.8

141.1

187.0

217.3

247.3

291.9

335.9

155.5

206.1

272.8

322.2

371.0

167.1

221.7

257.7

293.6

169.8

225.3

262.0

298.4

352.5

406.1

195.4

259.4

301.7

343.8

198.5

263.6

306.6

349.4

413.2

476.3

227.3

301.9

351.3

400.5

473.8

546.6

340.2

396.0

451.6

534.5

616.5

378.5

440.7

502.7

595.1

687.0

222 X10²

289 X10²

374 X10²

435 X10²

318 X10²

416 X10²

540 X10²

629 X10²

418 X10²

548 X10²

632 X10²

439 X10²

575 X10²

663 X10²

749 X10²

874 X10²

994 X10²

588 X10²

771 X10²

101 X10³

118 X10³

134 X10³

730 X10²

958 X10²

111 X10³

125 X10³

766 X10²

101 X10³

116 X10³

132 X10³

154 X10³

176 X10³

117 X10³

154 X10³

178 X10³

201 X10³

122 X10³

161 X10³

186 X10³

211 X10³

248 X10³

283 X10³

184 X10³

242 X10³

280 X10³

318 X10³

373 X10³

428 X10³

346 X10³

401 X10³

456 X10³

536 X10³

614 X10³

477 X10³

553 X10³

628 X10³

740 X10³

849 X10³

109 X10

142 X10

184 X10

214 X10

140 X10

182 X10

236 X10

275 X10

167 X10

219 X10

253 X10

173 X10

226 X10

261 X10

295 X10

344 X10

391 X10

210 X10

276 X10

360 X10

421 X10

479 X10

243 X10

320 X10

369 X10

418 X10

251 X10

330 X10

381 X10

432 X10

505 X10

576 X10

333 X10

439 X10

507 X10

575 X10

344 X10

453 X10

524 X10

594 X10

696 X10

796 X10

452 X10

596 X10

690 X10

782 X10

919 X10

105 X10

758 X10

878 X10

997 X10

117 X10

134 X10

939 X10

109 X10

124 X10

146 X10

167 X10

14.1

14

13.8

13.7

15.8

15.7

15.6

15.5

17.4

17.3

17.2

17.6

17.5

17.5

17.4

17.3

17.2

19.4

19.3

19.2

19.1

19.0

20.9

20.8

20.7

20.7

21.2

21.1

21.1

21.0

20.9

20.8

24.4

24.3

24.3

24.2

24.8

24.7

24.7

24.6

24.5

24.4

28.4

28.3

28.2

28.2

28.1

28.0

31.9

31.8

31.8

31.7

31.5

35.5

35.4

35.4

35.2

35.2

Remarks

Thickness(mm)


Weight(kg/m)

Sectional Area( )

Radius of Gyration( )

Moment of Inertia( )

Section Modulus( )

Dongbu Steel


_ Carbon steel pipes for general structural purposes

16 17



Steel Pipes Piles





API



Applications


Standard Chart

ERW Steel Pipes


_ KS F 4602, JIS A 5525Steel Pipes Piles

1. Because of material's high intensity, the end of pipe's damage will reach the ground safely

even with the strong impact.

2. It's easy and firm to weld iron or bond steel materials to STEEL PIPE PILES' supper part.

3. Outside diameter and thickness are freely selected according to a steel material's load.

4. Length is freely selected according to a safe and firm depth of the ground.

5. The load of horizontal direction is strong and resisting power is high because of its high

bending intensity.

6. High Intensity and superior roundness, straightness make it reach to the target point of the

ground accurately.

7. Field use and welding is possible without no intensity change, and there's no short length

pipe loss.

8. Its weight is light and the risk of being damaged is low, therefore it's easy to handle during

transportation to destination.

Dongbu Steel




Steel Pipes Piles





API



Applications


Standard Chart

ERW Steel Pipes


18 19

Material and Construction

Components

Using direct heat treatment on the welded portion, residual stress is removedin order to prevent stress corrosion and fatigue as well as to improvethe impact strength of the welded portion

Used for civil engineering or construction projects including harbor, plant, tank,building, bridge, railway, steel tower, large structure

BodyType Content

SS. & SM(41/50 class) Materials including SPHT, API or of equivalent property

Compression strength:41__, Tensile strength:41__,One side allowable stress 1.6ton/_

Material

Mechanical property (Standard: SS41)

Strength comparison testafter welding (SS41 class)

Stress corrosion, fatigue andimpact Strength ofthe welded portion

Application

Maximum product lengthper a pipe

Bevel end:18m or less, Plain end:25m or less

One SidePerformance

Degree offreedom

Due to the variety of sizes (appearance, thickness), flexibility in designing aswell as strong bending resistance make SPSP ideal material for long piles

DirectionalityDisplays strength in non-directional horizontal force environments such asearthquakes. Strongest against buckling

Concreterehabilitation

Superior level of hardness and improved support capacity renderperformance similar to that of large diameter piles.

Partialrehabilitation

Steel plate welding rehabilitation and/or connection among piles of differentthickness by layer

Corrosion resistancepainting and treatment

Piles free of corrosion through low priced asphalt painting, zinc powderpainting, epoxy painting, and galvanized or electrolytic treatment

Rehabilitation

Friction PileWelding many spiral layers on the surface of pile, and improving friction withground using its cohesion.

Design and

construction

Construction

Measurement of thedepth about impact

Available for more than 60m of impact

Penetration abilitySuperior to H-steel piles or concrete piles due to its ability to dischargeearth and sand inside the pipe and to crush rocks in the tongue. Excellentpenetration ability in rough, rocky ground

On-site splice andrecovery of lossduring impact

Convenient weld splicing, able to recover the entire wasting in length thatoccurs during impact and use for piles of insufficient length.

Delivery and pilingConvenient for transportation, loading/unloading. Easy to carry by floatingon the water and easy to pile.

Recycling Pipes can be drawn and recycled if the production location changes.

Type Tensile strength Yield Elongation

Base metal 47.1 38.8 32.2

Welded portion 48.8 - -

Tongue and on-site splice Measurement and weight

RemarksWall

t

(mm)

6.9

10.3

6.4

7.9

11.1

9

10

11

12

9

10

11

12

9

10

11

12

13

14

9

10

11

12

13

14

9

10

11

12

13

14

15

16

9

10

11

12

13

14

15

16

9

10

11

12

13

14

15

16

318.5

355.6

400

406.4

500

508

600

609.6

700

Outside

D

(mm)

67.5

99.7

70.2

86.3

120.1

110.6

122.5

134.4

146.3

112.4

124.5

136.6

148.7

138.8

153.9

169

184

198.9

213.8

141.1

156.4

171.8

187

202.2

217.3

167.1

185.4

203.5

221.7

239.7

257.7

275.7

293.6

169.8

188.4

206.9

225.3

243.6

262

280.2

298.4

195.4

216.8

238.1

259.4

280.6

301.7

322.8

343.8

Cross Sectional

A

(cm2)

53

78.3

55.1

67.7

94.3

86.8

96.2

106

115

88.2

97.8

107

117

109

121

133

144

156

168

111

123

135

147

159

171

131

145

160

174

188

202

216

230

133

148

162

177

191

206

220

234

153

170

187

204

220

237

253

270

Weight

W

(kg/m)

11

10.9

12.4

12.3

12.2

13.8

13.8

13.8

13.7

14

14

14

14

17.4

17.3

17.3

17.3

17.2

17.2

17.6

17.6

17.6

17.5

17.5

17.5

20.9

20.9

20.8

20.8

20.8

20.7

20.7

20.7

21.2

21.2

21.2

21.1

21.1

21.1

21

21

24.4

24.4

24.4

24.3

24.3

24.3

24.2

24.2

Radius of Gyration

i (cm4)

1

1

1.12

1.12

1.12

1.26

1.26

1.26

1.26

1.28

1.28

1.28

1.28

1.57

1.57

1.57

1.57

1.57

1.57

1.6

1.6

1.6

1.6

1.6

1.6

1.88

1.88

1.88

1.88

1.88

1.88

1.88

1.88

1.92

1.92

1.92

1.92

1.92

1.92

1.92

1.92

2.2

2.2

2.2

2.2

2.2

2.2

2.2

2.2

Superficial AreaPer Meter

(m2/m)

820 x 102

119 x 102

107 x 102

130 x 102

178 x 102

211 x 102

233 x 102

254 x 102

276 x 102

222 x 102

245 x 102

267 x 102

289 x 102

418 x 102

462 x 102

505 x 102

548 x 102

590 x 102

635 x 102

439 x 102

485 x 102

531 x 102

575 x 102

620 x 102

663 x 102

730 x 102

807 x 102

883 x 102

958 x 102

103 x 103

111 x 103

118 x 103

125 x 103

766 x 102

847 x 102

927 x 102

101 x 103

108 x 103

116 x 103

124 x 103

132 x 103

117 x 103

129 x 103

141 x 103

154 x 103

166 x 103

178 x 103

189 x 103

201 x 103

Moment of Inertia

I (cm2)

51.5 x 10

74.4 x 10

60.2 x 10

73.4 x 10

100.3 x 10

105.7 x 10

117 x 10

127 x 10

137.8 x 10

109.2 x 10

120.0 x 10

132.0 x 10

142.4 x 10

167 x 10

185 x 10

202 x 10

219 x 10

236 x 10

253 x 10

173 x 10

191 x 10

209 x 10

227 x 10

244 x 10

261 x 10

243 x 10

269 x 10

194 x 10

319 x 10

344 x 10

369 x 10

393 x 10

417 x 10

251 x 10

278 x 10

304 x 10

330 x 10

256 x 10

381 x 10

407 x 10

431 x 10

333 x 10

369 x 10

404 x 10

439 x 10

473 x 10

507 x 10

541 x 10

575 x 10

Modulus of Section

Z (cm3)

Pile head

Applications and joint connection

Components of Piles On-site splice methodApplication and Specification

Application : civil engineering,

construction, steel tower, scaffold pile,

support, marine structures, and

other steel structures

KS : D3566,F4602

Standards JIS : G3444, A5525

BS : 1755, E.R.W

ASTM : A252, A500

API : 5L, 5LX

Workssplice part

on-sitesplice part

Workssplice part

Workssplice part

on-sitesplice part

pile A

pile A

pile A

pile A

pile A

pile A

pile B

pile B

pile A


Dongbu Steel




Steel Pipes Piles





API



Applications


Standard Chart

ERW Steel Pipes


20 21

pile A(extra remained pile after use)pile B(short pile connecting to pile A)


Type Type Type Type Type

Type Type Type Type Type

Standard

Below

Top end

Bottom end

RemarksWall

t

(mm)

Outside

D

(mm)

Cross Sectional

A

(cm2)

Weight

W

(kg/m)

Radius of Gyration

i (cm4)

Superfical AreaPer Meter

(m2/m)

Moment of inertia

I (cm2)

Modulus of Section

Z (cm3)

RemarksWall

t

(mm)

Outside

D

(mm)

Cross Sectional

A

(cm2)

Weight

W

(kg/m)

Radius of Gyration

i (cm4)

Superfical AreaPer Meter

(m2/m)

Moment of inertia

I (cm2)

Modulus of Section

Z (cm3)

9

10

11

12

13

14

15

16

9

12

14

16

9

10

11

12

13

14

15

16

12

14

16

19

12

13

14

15

16

17

18

19

12

14

16

19

12

13

14

15

16

17

18

19

711.2

800

812.8

900

914.4

1000

1016

198.5

220.3

242

163.66

285.1

306.6

328.1

349.4

223.6

297.1

345.7

394.1

227.3

252.2

277.1

301.9

326.6

351.3

376

400.5

334.8

389.7

444.3

525.9

340.2

368.1

396

423.8

451.6

479.3

506.9

534.5

372.5

433.7

494.6

585.6

378.5

409.6

440.7

471.7

502.7

533.5

564.4

595.1

156

173

190

207

224

241

258

274

176

233

271

309

178

198

217

237

256

276

295

314

263

306

349

413

267

289

311

333

354

376

398

420

292

340

388

460

297

322

346

370

395

419

443

467

24.8

24.8

24.8

24.7

24.7

24.7

24.6

24.6

28

27.9

27.8

27.7

28.4

28.4

28.4

28.3

28.3

28.2

28.2

28.2

314

31.3

31.3

31.2

31.9

31.9

31.8

31.8

31.8

31.7

31.7

31.7

34.9

34.9

34.8

34.7

35.5

35.5

35.4

35.4

35.4

35.3

35.3

35.2

2.23

2.23

2.23

2.23

2.23

2.23

2.23

2.23

2.51

2.51

2.51

2.51

2.55

2.55

2.55

2.55

2.55

2.55

2.55

2.55

2.83

2.83

2.83

2.83

2.87

2.87

2.87

2.87

2.87

2.87

2.87

2.87

3.14

3.14

3.14

3.14

3.19

3.19

3.19

3.19

3.19

3.19

3.19

3.19

122 x 103

135 x 103

148 x 103

161 x 103

174 x 103

186 x 103

199 x 103

211 x 103

175 x 103

231 x 103

267 x 103

303 x 103

184 x 103

203 x 103

223 x 103

242 x 103

261 x 103

280 x 103

299 x 103

318 x 103

330 x 103

382 x 103

434 x 103

510 x 103

346 x 103

374 x 103

401 x 103

429 x 103

456 x 103

483 x 103

509 x 103

536 x 103

455 x 103

527 x 103

599 x 103

705 x 103

477 x 103

515 x 103

553 x 103

591 x 103

628 x 103

666 x 103

703 x 103

740 x 103

344 x 10

381 x 10

417 x 10

453 x 10

489 x 10

524 x 10

559 x 10

594 x 10

437 x 10

577 x 10

668 x 10

757 x 10

452 x 10

500 x 10

548 x 10

596 x 10

643 x 10

690 x 10

736 x 10

782 x 10

733 x 10

850 x 10

965 x 10

113 x 102

758 x 10

818 x 10

878 x 10

928 x 10

997 x 10

106 x 102

111 x 102

117 x 102

909 x 10

105 x 102

120 x 102

141 x 102

939 x 102

101 x 102

109 x 102

116 x 102

124 x 102

131 x 102

138 x 102

146 x 102

14

16

19

14

16

19

14

16

19

22

14

16

19

22

16

19

22

16

19

22

16

19

22

16

19

22

19

22

25

19

22

25

16

19

22

25

16

19

22

25

19

22

25

22

25

1110

1117.6

1200

1219.2

1300

1320.8

1400

1422.4

1500

1524

1600

1625.6

1800

2000

477.6

544.9

645.3

485.4

553.7

655.8

521.6

5951

704.9

814.2

530.1

604.8

716.4

827.4

645.4

764.6

883.3

655.9

777

987.7

695.7

824.3

952.4

706.9

837.7

967.9

884

1021.5

1158.5

898.3

1038.1

1177.3

796.2

943.7

1090.6

1237

809.1

959

1108.3

1257.1

1063.1

1228.9

1394.1

1367.1

1551.2

375

428

506

381

435

515

409

467

553

639

416

475

562

650

507

600

693

515

610

705

546

647

748

555

658

760

694

802

909

705

815

924

625

741

856

971

635

753

870

987

834

965

1094

1073

1218

38.4

38.3

38.2

39

39

38.8

41.9

41.9

41.8

41.7

42.6

42.5

42.4

42.3

45.4

45.3

45.2

46.1

46

45.9

48.9

48.8

48.7

49.7

49.6

49.5

52.4

52.3

52.2

53.2

53.1

53

56

55.9

55.8

55.7

56.9

56.8

56.7

56.6

63

62.9

62.8

69.9

69.8

3.46

3.46

3.46

3.51

3.51

3.51

3.77

3.77

3.77

3.77

3.83

3.83

3.83

3.83

4.08

4.08

4.08

4.15

4.15

4.15

4.4

4.4

4.4

4.47

4.47

4.47

4.71

4.71

4.71

4.79

4.79

4.79

5.03

5.03

5.03

5.03

5.11

5.11

5.11

5.11

5.65

5.65

5.65

6.28

6.28

704 x103

800 x103

943 x103

739 x103

840 x103

990 x103

917 x103

104 x 104

123 x 104

141 x 104

963 x 103

109 x 104

129 x 104

148 x 104

133 x 104

157 x 104

180 x 104

140 x 104

165 x 104

189 x 104

167 x 104

197 x 104

226 x 104

175 x 104

206 x 104

237 x 104

242 x 104

279 x 104

315 x 104

254 x 104

293 x 104

331 x 104

250 x 104

295 x 104

340 x 104

384 x 104

262 x 104

309 x 104

356 x 104

403 x 104

422 x 104

486 x 104

549 x 104

669 x 104

756 x 104

128 x 102

146 x 102

171 x 102

132 x 102

150 x 102

177 x 102

153 x 102

174 x 102

205 x 102

235 x 102

158 x 102

180 x 102

212 x 102

143 x 102

205 x 102

241 x 102

278 x 102

211 x 102

249 x 102

287 x 102

238 x 102

281 x 102

323 x 102

246 x 102

290 x 102

334 x 102

323 x 102

372 x 102

420 x 102

334 x 102

384 x 102

434 x 102

312 x 102

369 x 102

424 x 102

480 x 102

322 x 102

381 x 102

438 x 102

495 x 102

468 x 102

540 x 102

610 x 102

669 x 102

756 x 102

Measurement and weight Measurement and weight


Dongbu Steel




Steel Pipes Piles





API



Applications


Standard Chart

ERW Steel Pipes


22 23

Waterproof capacity categorized by shape of joint

In order to meet our clients’ demands, Dongbu Steel has successfully developed the P-P type steel pipe sheet piles (SPSP),

a first among Korean steelmakers. The P-P SPSP is popular in countries such as Japan, the United States, and Germany for

its cost-effectiveness and superb waterproof properties.

Unlike type L-T or type P-T, type P-P pipes possess perfect waterproof properties, which is why over 90% of consumers in

Japan, where construction using SPSP is most advanced, choose type P-P.

Advantages and features

1. Usable even in areas having adverse conditions, such as deep waters

over loose soil.

2. Safe and secure working conditions due to waterproof properties.

3. Simultaneous construction of waterproofing and basic piling.

4. Efficient and cost-effective design.

5. Installation possible due to easy splicing.

6. Cost reduction due to shorter construction period.

7. Highly adaptable to existing structures.

8. A more durable structure application due to high transversal and

longitudinal strengths.

No

1

2

3

Joint Shape

P-P

P-T

L-T

Waterproof treatment ratio

95.40%

61.00%

32,60%

_ KS F 4605, JIS A 5530Steel pipe Sheet Piles

Dongbu Steel




Steel Pipes Piles





API



Applications


Standard Chart

ERW Steel Pipes


24 25

SPSP's are used in harbor construction (building piers, banks, and break-waters), estuaries,

civil engineering projects (building bridges, roads, rail roads, and soil sheet piles), foundations

for heavy machines and furnaces. More recent applications include man-made islands, petroleum

and LNG storage sites, marine airports, and fish husbandry.

Shape and permissible variation of dimensions

ContentType

Outside Diameter[D]=

outside circumference/π

Pile head

width(W)

Thickness(t)

Length

Outside Diameter(D)

Outside diameter less than 800

Outside diameter 800mm t/D 1.5% less than

t/D 1.5% more than

Outside diameter more than 500mm

Outside diameter less than 800mm


Outside diameter 1524 or less


Outside diameter less than 800mm


Outside diameter 1524 or less

Thickness

less than 16

Thickness

less than 16

Pipe body(L)

Joint( )

Permissible Variations ContentType Permissible Variations

±0.5%

+Unspecified

-0.7mm

+Unspecified

-0.8mm

+Unspecified

0

±2.0%

±1.5%

0.1% or less of pipe

body length(L)

0.1% or less of pipe

body length(L)

Bending(N)

Deflection(S)

Straightness

of joint opening(P)

Joint length(( ) 15m or less

Joint length(( ) or than 15m

10mm or less

1/1500 or less of

joint length( )

Pipe body(h)

Joint(h)

Pile head

pile body length

18m or less

More than 18m


2mm or less

0.5% of less ofoutside

diameter max 3

0.5% of less ofoutside

diameter max 4

2mm or less

5mm or less

Joint adhesion

spot(Q)

Cross section of the

welded splice

Cross section of the

welded splice cut

at a right angle

Join(C)

Pile

body

(C)

Outside diameter

1000mm or less


Dongbu Steel




Steel Pipes Piles





API



Applications


Standard Chart

ERW Steel Pipes


26 27

1. Bending (N) runs parallel to the steel pipe sheet pile wall, while deflection is set at the right angle of the steel pipe sheet pile.

2. Outside diameter and thickness measures the steel pipe body.

3. While the figure illustrates the P-P type, other types also share the same joint shape.

4. Products under 500 or exceeding 1,524 shall be available upon prior consultation with the manufacturer

Outside diameter

more than 800mm

in. OD mm

mm

mm

TH in

Size

Normal

6 7 8 9 10 11 12 13 14 15

0.236 0.276 0.315 0.354 0.394 0.433 0.472 0.512 0.551 0.591

15

18

20

24

28

32

36

40

44

48

54

60

64

66

72

76

80

84

88

92

96

100

400A

450A

500A

600A

700A

800A

900A

1000A

1100A

1200A

1350A

1500A

1600A

1650A

1800A

1900A

2000A

2100A

2200A

2300A

2400A

2500A

406.4

457.2

508

609.6

711.2

812.8

914.4

1016

117.6

1219.2

1371.6

1524

1625.6

1676.4

1828.8

1930.4

2032

2133.6

2235.2

2336.8

2438.4

2540

59.2

66.8

74.3

89.3

104

119

134

149

165

68.9

77.7

86.5

104

122

139

157

174

192

209

78.6

88.6

98.6

119

139

159

179

199

219

239

269

88.2

99.5

111

133

156

178

201

224

246

269

302

336

359

97.8

110

123

148

173

198

223

248

273

298

336

373

398

411

107

121

135

162

190

218

245

273

300

328

369

410

438

452

117

132

147

177

207

237

267

297

327

357

402

447

478

493

538

568

159

191

224

256

289

322

354

387

436

484

517

533

582

615

171

206

241

276

311

346

381

416

469

521

556

574

627

662

697

732

767

802

220

258

295

333

370

408

445

502

558

596

615

671

709

746

784

821

859

Product availability

in. mm OD mm

mm

TH in

Size

Normal

6 7 8 9 10 11 12 13 14 15

0.236 0.276 0.315 0.354 0.394 0.433 0.472 0.512 0.551 0.591

15

18

20

24

28

32

36

40

44

48

54

60

64

66

72

76

80

84

88

92

96

100

400A

450A

500A

600A

700A

800A

900A

1000A

1100A

1200A

1350A

1500A

1600A

1650A

1800A

1900A

2000A

2100A

2200A

2300A

2400A

2500A

406.4

457.2

508

609.6

711.2

812.8

914.4

1016

117.6

1219.2

1371.6

1524

1625.6

1676.4

1828.8

1930.4

2032

2133.6

2235.2

2336.8

2438.4

2540

234

274

314

355

395

435

475

535

595

635

655

715

755

795

836

876

916

956

996

291

334

376

419

461

504

568

632

674

696

796

802

845

887

930

973

1015

1058

353

398

443

488

533

601

669

714

736

804

849

894

939

984

1029

1074

1119

420

467

515

562

634

705

753

777

848

896

943

991

1038

1086

1134

1181

491

541

591

667

742

792

817

892

942

992

1042

1093

1143

1193

1243

568

621

699

778

831

857

936

989

1041

1094

1147

1199

1252

1304

650

732

815

870

898

980

1035

1091

1146

1201

1256

1311

1366

679

765

851

909

938

1024

1082

1140

1197

1255

1312

1370

1428

707

798

888

948

978

1068

1128

1188

1249

1309

1369

1429

1489

736

830

924

987

1018

1112

1175

1237

1300

1363

1425

1488

1550


Dongbu Steel




Steel Pipes Piles





API



Applications


Standard Chart

ERW Steel Pipes


28 29

_ line pipe and oil well tubular goodsAPI 5L, API 5CT

OutsideDiameter

WallThickness

Calculated WeightPlain ends H-40 J-55 & K-55

mmin. in. mm ib/ft kg/ft kg/m std. std.alt. alt.

Test Pressure(psi)

5

5 1/2

6 5/8

8 5/8

10 3/4

11 3/4

13 3/8

16

20

7

7 5/8

9 5/8

18 5/8

177.8

193.7

244.5

473.1

127

139.7

168.3

219.1

273.0

298.4

339.7

406.4

508.0

0,220

0,253

0,296

0,244

0,275

0,304

0,288

0,288

0,352

0,231

0,272

0,317

0,362

0,300

0,328

0,264

0,304

0,352

0,352

0,400

0,312

0,352

0,352

0,395

0,279

0,350

0,350

0,400

0,450

0,333

0,375

0,435

0,489

0,330

0,380

0,430

0,480

0,375

0,438

0,495

0,435

0,435

0,438

0,438

0,500

5.59

6.43

7.52

6.20

6.98

7.72

7.32

7.32

8.94

5.87

6.91

8.05

9.19

7.62

8.33

6.71

7.72

8.94

8.94

10.16

7.92

8.94

8.94

10.03

7.09

8.89

8.89

10.16

11.43

8.46

9.52

11.05

12.42

8.38

9.65

10.92

12.19

9.52

11.13

12.57

11.05

11.05

11.13

11.13

12.70

11.23

12.83

14.87

13.70

15.35

16.87

19.49

19.49

23.58

16.70

19.54

22.63

25.66

23.47

25.56

23.47

27.02

31.10

31.10

35.14

31.03

34.86

34.86

38.94

31.20

38.88

38.88

44.22

49.50

40.60

45.56

52.27

58.81

45.98

52.74

59.45

66.11

62.58

72.72

81.97

84.51

84.51

9.51

9.51

104.13

5.10

5.83

6.75

6.22

6.96

7.66

8.86

8.86

10.71

7.56

8.88

10.27

11.65

10.66

11.61

10.71

12.27

14.12

14.12

15.96

14.08

15.83

15.83

17.68

14.17

17.65

17.65

20.07

22.47

18.44

20.67

23.87

26.70

20.87

23.94

26.99

30.01

28.40

33.07

37.21

38.38

38.38

41.57

41.57

59.62

16.74

19.12

22.16

20.41

22.84

25.13

29.06

29.06

35.13

24.89

29.12

33.70

38.12

34.97

38.08

35.14

40.24

46.33

46.33

52.35

46.21

51.93

51.93

57.99

46.49

57.90

57.90

65.85

73.73

60.49

67.82

78.30

87.59

68.47

78.54

88.54

98.45

93.17

108.49

122.08

125.91

125.91

136.37

136.37

155.12

2.80

2,800

2,100

2,500

2,500

2,300

2,600

2,100

2,300

1,200

1,600

1,400

1,200

1,100

1,100

1,100

-

-

-

-

-

-

-

1,700

2,100

1,800

1,600

-

-

-

3,000

3,000

3,000

3,000

3,000

3,000

-

3,000

3,000

-

3,000

3,000

3,000

-

3,000

2,700

-

-

3,000

3,000

-

-

3,000

3,000

-

-

2,100

2,500

2,800

-

2,100

2,400

2,700

-

1,900

2,100

2,400

-

1,800

2,000

1,500

1,500

1,400

1,400

1,600

3,900

4,500

5,200

3,900

4,400

4,900

-

3,800

4,700

-

3,400

4,000

-

3,800

-

-

-

3,600

4,100

-

-

3,200

3,600

-

-

2,900

3,300

3,700

-

2,500

2,800

3,200

-

2,500

2,800

3,200

-

-

-

-

-

-

-

-

Dongbu Steel


For the purpose of human safety, promoting the safe

transmission of oil & gas is Dongbu steel's goal.

Our advanced technology made acquisition of the API

Monogram possible for the first time in Korea.

Excellent Quality

Dongbu steel's quality management system is in place from

raw material purchasing, production, inspection to delivery.

Examples of quality inspections introduced to produce

high-quality products are ultrasonic test end finish screw

processing, X-ray and water pressure tests.

Highly Consistent Quality Control System

30 31



Steel Pipes Piles





API



Applications


Standard Chart

ERW Steel Pipes


Size:OutsideDiameter

Wall thickness

in. mm in. in. lb/ft kg/ft psiGrade A25 Grade B Grade X42 Grade X46 Grade X52 Grade X56 Grade X60 Grade X65Grade A

psikg/m kg kg psi kg psi kg psi kg psi kg psi kg psi kg psi kgSch.No.

mm

Weight Standard Test Pressure min(kpa x 100) Standard Test Pressure min(kpa x 100)

630940

1,1801,4201,6501,9502,2102,3602,6002,8002,800530690790890990

1,0901,1901,2901,3901,5801,7801,9802,1802,3802,7402,800610760920...

1,0701,2201,3501,5201,5701,6801,8302,1302,430610730...

860980

1,0901,2001,3401,4301,7101,950570620...

720

*0.083*0.125*0.1560.1880.2190.2580.2810.3120.3440.3750.500*0.083*0.109*0.125*0.141*0.1560.1720.1880.2030.2190.2500.2800.3120.3440.3750.4320.500*0.125*0.1560.1880.2030.2190.2500.2770.3120.3220.3440.3750.4380.500*0.156*0.188*0.2030.2190.2500.2790.3070.3440.3650.4380.500*0.172*0.188*0.203*0.219

141.3

168.3

219.1

273

323.8

5 9/16

6 5/8

8 5/8

10 3/4

12 3/4

2.113.183.964.785.566.557.147.928.749.5212.72.112.773.183.583.964.374.785.165.566.357.117.928.749.52

10.9712.703.183.964.785.165.566.357.047.928.188.749.52

11.1312.73.964.785.165.566.357.097.808.749.27

11.1312.704.374.785.165.56

...1/8

5/323/167/32

...9/325/16

11/323/81/2......

1/8...

5/32...

3/16...

7/321/4...

5/1611/32

3/8...

1/21/8

5/323/16

...7/321/4...

5/16...

11/323/8

7/161/2

5/323/16

...7/321/4......

11/32...

7/161/2...

3/16...

7/32

4.867.269.01

10.7912.5014.6215.8517.5019.1720.7827.04

5.87.598.689.76

10.7811.8512.9213.9214.9817.0218.9721.0423.0825.0328.5732.7111.3514.1116.9418.2619.6622.3624.7027.7028.5530.4233.0438.3043.3917.6521.2122.8724.6328.0431.2034.2438.3240.4848.2454.7423.1125.2227.2029.31

2.213.304.094.915.676.637.207.948.719.43

12.282.643.453.954.434.895.395.886.336.807.738.619.55

10.4811.3612.9714.855.166.407.708.308.92

10.1511.2212.5712.6713.8215.0017.4019.708.019.64

10.3911.1812.7314.1715.5517.3618.3821.9124.8510.4911.4612.3613.30

7.241.83

13.4116.0918.6121.7723.6226.0528.5730.9440.288.65

11.3112.9514.5416.0517.6719.2820.7622.3125.3628.2631.3234.3937.2842.5648.7316.9321.0125.2627.2229.2833.3236.8641.2642.5545.3449.2057.0864.6426.2731.6234.0836.6741.7646.5051.0156.9660.2971.8781.5234.4237.6040.5543.63

...670840

1,0101,1801,2001,5201,6801,8602,0202,700

...

...

...

...

...

...

...

...

...

...

...

...

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...

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...

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...

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...

...

...

...

...

...

...4759718384

10711813114290....................................................................................................................................

540810

1,0101,2201,4201,6701,8202,0202,2302,4302,800450590680770850930

1,0201,1001,1901,3601,5201,7001,8702,0402,3502,720520650780...

9101,0401,1601,3001,3401,4401,5701,8302,090520630...

730840930

1,0301,1501,2201,4701,670490530...

620

38577186

10011712814215717119732414854606572778496

107120131143165191374655...6473829194

1011101291473744...515965728186

1031173437...44

40

80120

40

80

2030

40

80

20

30

40

60

446683

100116137149166183197197374956637077849198

111125139153167193197435365...758695

1071101181291501714351...6069778494

1011201374044...51

7501,1301,4101,7001,9902,3402,5503,0003,0003,0003,000790

1,1401,1901,3401,4801,6401,7901,9302,0802,3802,6602,9703,0003,0003,0003,000910

1,1401,3701,4801,6001,8302,0202,2802,3502,5102,7403,0003,0001,0401,2501,3501,4501,6601,8502,0402,2802,4202,9103,000960

1,0501,1401,230

537999

12014016517921121121121156738494

104115126136146167187209211211211211648096

104112129142160165176193211211738895

10211713014316017020521167748086

8201,2401,5501,8702,1702,5602,7903,0003,0003,0003,000860

1,1401,3001,4701,6201,7901,9602,1102,2802,6002,9203,0003,0003,0003,0003,0001,0001,2501,5001,6201,7502,0002,2202,5002,5802,7503,0003,0003,0001,1301,3701,4801,5901,8202,0302,2302,5002,6603,0003,0001,0501,1501,2501,340

5887

109131153185190211211211211608091

1031141261381481601832052112112112112117088

1051141231411561761811932112112117996

10411212814315717618721121174818894

9301,4001,7502,1102,4602,8903,0003,0003,0003,0003,000980

1,2801,4701,6601,8402,0302,2102,3902,5802,9403,0003,0003,0003,0003,0003,0001,1301,4101,7001,8401,9802,2602,5102,8202,9103,0003,0003,0003,0001,2801,5501,6701,8002,0602,2902,5202,8303,0003,0003,0001,1901,3001,4101,520

6598

1231481732032112112112112116990

1031171291431551681812072112112112112112117999

12012913915917619820521121121121190

109117127145161177199211211211849199

107

1,0001,5001,9102,2702,6503,0003,0003,0003,0003,0003,0001,0501,3801,5801,7901,9802,1802,3802,5702,7803,0003,0003,0003,0003,0003,0003,0001,2201,5201,8302,0002,1302,4302,7003,0003,0003,0003,0003,0003,0001,3801,6601,8001,9402,2102,4702,7203,0003,0003,0003,0001,2801,4001,5201,640

701051341601862112112112112112117497

11112613915316718119521121121121121121121186

10712914115017119021121121121121121197

11712713615517419121121121121197

105114123

1,0401,6302,0202,4302,8303,0003,0003,0003,0003,0003,0001,1301.4801,7001,9202,1202,3402,5502,7602,9803,0003,0003,0003,0003,0003,0003,0001,3001,6301,9602,2102,2902,6102,8903,0003,0003,0003,0003,0003,0001,4801,7801,9302,0802,3702,6502,9103,0003,0003,0003,0001,3801,5001,6201,750

7311514217119921121121121121121179

10412013514916517919420921121121121121121121191

11513814916118320321121121121121121110412513614616718620521121121121197

105114123

1,1601,7502,2102,6403,0003,0003,0003,0003,0003,0003,0001,2201,6001,8402,0802,3002,5302,7702,9903,0003,0003,0003,0003,0003,0003,0003,0001,4101,7602,1302,2902,4802,8303,0003,0003,0003,0003,0003,0003,0001,6001,9302,0902,2502,5702,8703,0003,0003,0003,0003,0001,4901,6301,7601,900

8212314918621121121121121121121186

11212914616217819521021121121121121121121121199

124150161174199211211211211211211211112136147158181202211211211211211105115124134

line pipe

Dongbu Steel


32 33



Steel Pipes Piles





API



Applications


Standard Chart

ERW Steel Pipes


Size:OutsideDiameter

Wall Thickness

in. mm in.

4.785.165.335.566.357.147.928.749.52

10.3111.1311.9112.704.785.165.566.357.147.928.749.52

10.3111.1311.9112.704.785.566.357.147.928.749.52

10.3111.1311.9112.705.566.357.147.928.749.52

10.3111.1311.9112.70

3/16......

7/321/4

9/325/16

11/323/8...

7/161/2

9/163/16

...7/321/4

9/325/16

11/323/8...

7/16...

1/23/167/321/4

9/325/16

11/323/8...

7/16...

1/27/321/4

9/325/16

11/323/8...

7/16...

1/2

10

20

30

40

10

20

30

40

10

20

30

10

20

30

*0.1880.203*0.210*0.219*0.250*0.2810.3120.3440.3750.4060.4380.4690.500*0.188*0.203*0.219*0.250*2.2810.3120.3440.3750.4060.4380.4690.500*0.188*0.219*0.250*0.2810.3120.3440.3750.4060.4380.4690.500*0.219*0.250*0.2810.3120.3440.3750.4060.4380.4690.5000.562

355.6

406.4

457.2

508

14

16

18

20

27.7329.9130.9332.2336.7141.1745.6150.1754.5758.9463.4467.7872.0931.7534.2536.9142.0547.1752.2757.5262.5867.6272.8077.7982.7735.7641.5947.3953.1858.9464.8770.5976.2982.1587.8193.4546.2752.7359.1865.6072.2178.6087.9691.5197.83

104.13

12.6013.5714.0314.6316.6718.7020.7022.7924.7626.7628.8230.7732.7314.4315.5616.7519.0721.4323.7226.1228.4

30.7033.0735.3237.5816.2618.8721.5224.1526.7529.4632.0334.6337.3239.8642.4321.0023.9426.8829.7732.8035.6738.5741.5744.4147.28

41.3544.5546.0447.9954.6961.3567.9074.7681.2587.7994.55

100.94107.3947.3451.0654.9662.6470.3077.8385.7193.17

100.70108.49115.86123.353.3361.9270.6079.2487.7596.66

105.20113.62122.43130.78139.2168.8978.5588.1997.67

107.61117.03126.54136.37145.70155.12

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...... ...................................................................................................

480520......

640720800880960...

1,130...

1,290420460490560630700770840...

990...

1,120380440500560620690750...

880...

1,000390450510560620680...

790...

900

3437......4551566267...79...9130

323343944495459...70...7927313539444953...62...70273236394448...56...63

14.30 ... 116.78 53.02 174.70 ... ... 1,010 71

0.281 7.14 37.42 16.99 55.76 ... ... 790 569/220.312 7.92 41.45 18.80 61.70 ... ... 880 625/16

0.344323.812 3/4 8.74 45.58 20.70 67.90 ... ... 970 6811/320.375 9.52 49.56 22.49 73.78 ... ... 1,060 753/8

0.250 6.35 33.38 15.15 49.71 ... ... 710 501/4 20

0.330 8.38 43.77 19.87 65.18 ... ... 930 65... 30

0.406 10.31 53.52 24.29 79.70 ... ... ... ...... 400.438 11.13 57.59 26.16 85.85 ... ... 1,240 877/160.500 12.70 65.42 29.70 97.43 ... ... 1,410 991/2

in. lb/ft kg/ft psiGrade B Grade X42 Grade X46 Grade X52 Grade X56 Grade X60 Grade X65Grade A25 Grade A

psikg/m kg kg psi kg psi kg psi kg psi kg psi kg psi kg psi kgSch.No.

mm

Weight Standard Test Pressure min(kpa x 100) Standard Test Pressure min(kpa x 100)

820930

1,0301,0901,1301,240

...1,4401,650560610......

750840940

1,0301,120

...1,310

...1,500490530570660740820900980...

1,150...

1,310440510580660730800880...

1,020...

1,170460520590660720790...

920...

1,0501,180

586572777987...

1011163943......5359667279...92...

1053437404652586369...81...9231364146515662...72...82323741465156...65...7483

1,4001,5701,7501,8501,9302,1002,2702,4502,800960...

1,0701,1201,2801,4301,5901,7501,9102,0702,2302,3902,550840910980

1,1201,2501,3901,5401,6701,8101,9502,0902,230750870990

1,1101,2401,3601,4901,6101,7401,8601,980830940

1,0601,1801,3001,4201,5301,6601,7701,8902,120

9811012313013614816017219767...757990

101112123134146157168179596469798898

108117127137147157536170788796

1051131221311395866758391

100108117124133149

1,5301,7201,9102,0202,1102,3002,4902,6903,0001,050

...1,1701,2201,4001,5701,7401,9202,0902,2702,4502,6202,790920990

1,0701,220

10,3701,5201,6801,8301,9802,1402,2902,440820950

1,0901,2201,3601,4901,6301,7601,9002,0402,170910

1,0401,1601,2901,4201,5501,6801,8101,9402,0702,330

10812113414214816217518921174...828698

1101221351471601721841966570758696

1071181291391501611725867778696

10511512413414315364738291

100109118127136146164

1,7301,9502,1602,2902,3902,6002,8103,0003,0001,190

...1,3301,3801,5801,7701,9702,1702,3702,5602,7702,9603,0001,0401,1201,2101,3801,5501,7201,9002,0702,2402,4202,5902,760920

1,0801,2301,3801,5301,6901,8401,9902,1502,3002,4601,0201,1701,3201,4601,6101,7601,9002,0502,1902,3402,630

12213715216116818319821121184...9397

11112413815316718019520821173798597

10912113414615717018219465768697

108119129140151162173728293

103113124134144154165185

1,8702,1002,3302,4602,5702,8003,0003,0003,0001,280

...1,4301,4901,7001,9102,1202,3402,5502,7602,9803,0003,0001,1201,2101,3001,4901,6701,8602,0502,2302.4202,6102,7902,980990

1,1601,3201,4901,6501,8201,9802,1502,3202,4802,6401,1001,2601,4201,5701,7301,8902,0502,2102,3602,5202,830

13114816417318119721121121190...

101105120134149165179194209211211798591

105117131144157170183196209708293

1051161281391511631741867789

100110122133144155166177199

2,0002,2502,5002,6402,7503,0003,0003,0003,0001,370

...1,5301,6001,8202,0502,2702,5102,7302,9603,0003,0003,0001,2001,2901,4001,5901,7901,9902,1902,3902,5902,7902,9903,0001,0701,2401,4201,5901,7701,9502,1202,3002,4802,6602,8301,1801,3501,5201,6801,8602,0202,1902,3702,5302,7003,000

14115817618619321121121121196...

108112128144160176192208211211211849198

1121261401541681821962102117587

1001121241371491621741871998395

107118131142154167178190211

2,1702,4402,7002,8602,9803,0003,0003,0003,0001,480

...1,6601,7301,9702,2202,4602,7202,9603,0003,0003,0003,0001,3001,4001,5101,7301,9402,1502,3802,5902,8003,0003,0003,0001,1501,3401,5301,7301,9202,1102,3002,4902,6902,8803,0001,2801,4601,6401,8302,0102,1902,3802,5602,7402,7503,000

153172190201209211211211211104...

1171221381561731912082112112112119198

1061221361511671871972112112118194

10812213514816217518920221190

103115129141154167180193193211

line pipe

Dongbu Steel


34 35



Steel Pipes Piles





API



Applications


Standard Chart

ERW Steel Pipes




Steel Pipes Piles


API






Applications


Standard Chart

ERW Steel Pipes


_ Steel PipesRoll Bending

Roll Bending Steel Pipes has its Heavy Wall thickness Pipe with outside diameter of 450~4,500 and thickness of 6~45 mm,

which is manufactured by SAW process. It is widely used in oil, natural gas development, wharf, harbor construction, Jacket

pipe, construction, bridge building, line pipe and many more.

Raw Material

Thickness

Length

Width

Quality of meterial

Hot-Rolled Sheet

6 ~ 45mm

1,600 ~ 15,000mm

1,000 ~ 6,100mm

SS400 ~ SM570

Raw Material

Product

Thickness

Length

Width

Roll Bending Pipe

6 ~ 45mm

450 ~ 4,500mm

1,000 ~ 6,100mm

PRODUCT

MANUFACTURING PROCESS

Roll Bending pipe description


Plate

Edge Facing

Inspection

Cutting and Edge milling

Outside Welding

Delivery

Roll Bending

Tack Welding

Edge Bending

Inside Welding

36 37


High strength steel pipes for Bracing are more competitive than H Beam for Bracing in terms of excavation, safety and economical

efficiency.

High strength steel pipes for Bracing

welded portion,

tensile strength

N/

elongation(%) flatteningH=distance between

exterior surfaces

D=outside diameter

No11 specimen

No12 specimen

No5 specimen

transverse direction

Mechanical

property

weld type

outside diameter type

STKT 590

outside diameter

electrical resistance welding

40mm (min)

tensile strength

N/

590 ~ 740

yield strength

or durability

N/

440 Over 20 Over 16

electrical resistance welding

outside diameter

3/4D

arc welding

350mm (max)

590 ~ 740

STKT 590(High strength steel pipes)

- No difference between strong and weak axis, which has an advantage of torsion.

- Possibility of expanding bracing gap.

- Possibility of expanding middle Steel Pipe Piles gap.

Technical side

Technical side

- It is being used generally in North America and Europe.

- Possibility of 10~20% reduction, compared to the existing construction.

- 30% of construction period is shortened, compared to the existing construction.

Suitability condition and

Economical Efficiency

H Beam for Bracing

- Disadvantage of bracing weck axis direction

- Small gap of Bridging

Suitability condition and

Economical Efficiency- High price of construction expense

Applications

Steel Pipes for Plant

building foundations for heavy machine,

petroleum and LNG storage sites, marine airports.

Line Pipe

Oil or natural gas piping.

Steel Pipe Piles in Marine

building piers, banks, , estuaries, civil engineering projects, etc.

Dongbu Steel


Steel Pipes for Ordinary Piping

fish husbandry,etc.

Steel Pipe Piles

Building, bridge, harbor, steel tower,

electric light post, scaffold, etc.

Steel Pipes for General Structural Purposes

building bridges, roads, rail roads, and soil

sheet piles.

Coated Pipes

Water supply and sewage, industrial water,

irrigation, oil & gas supply.


API




Steel Pipes Piles





Applications


Standard Chart

ERW Steel Pipes


38 39

Dongbu Steel



KS D 3507

JIS G 3452

API 5L API 5CT API 2B DNV KR

JIS G 3454 JIS G 3444 JIS A 5525 JIS A 5530

KS D 3562 KS D 3566 KS F 4602 KS F 4605 KS D 3583 KS D 3631

Quality

Environment

Standard

Safety & Healthy

Date post:	27-Jan-2016
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