Seamless Steel Pipe

Seamless Hydraulic Tube, Round cold drawn seamless hydraulic steel tube

Seamless Steel Pipe

Seamless Hydraulic Tube, Round cold drawn seamless hydraulic steel tube
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Seamless Hydraulic Tube

Seamless Hydraulic Tube

Size: 4mm to 130mm outer diameter 
Material:E355 (ST52.4),E235 (ST37.4)
Standard:DIN 2391/C (DIN EN 10305-1),DIN 2445/2 (DIN EN 10305-4)
Finishing:NBK (Phosphate and Normalized)

Seamless hydraulic tube is designed to convey liquid fluids to among hydraulics components, fittings, valves, flanges, and other tools. It is made of material E355 (ST 52.4) or E235 (ST 37.4). These two grades have different chemical composition. This helps to control the working pressure. 


Chemical Composition (%)
Carbon (C)
Silicon (Si)
Manganese (Mn)
Phosphorus (P)
Sulfur (S)
E355 (ST52.4)
⩽ 0.22 
⩽ 0.55 
⩽ 1.6 
⩽ 0.045 
⩽ 0.045
E235 (ST37.4) 
⩽ 0.17 
⩽ 0.35
 ⩽ 1.2 
⩽ 0.045 
⩽ 0.045

Seamless hydraulic tube is made according to DIN 2391/C (DIN EN 10305-1) or DIN 2445/2 (DIN EN 10305-4) standards and it is available in millimeters, inches outer diameter, and inches nominal bore size.


How to make Seamless hydraulic tube


The tubes surface finishing is NBK, where the tubes are phosphate and normalized which provides corrosion resistance. It is oiled inside and outside. Normalize process creates tougher metal product. During normalizing, metals will be heated at a high temperature, and it allowed to naturally cool back down to room temperature by exposure after heating. Metals that have been through this process are more formable, harder and ductile.  

Pressure ratings of Seamless hydraulic tube 


Allowable working pressures are calculated using as per DIN 2413 at normal temperature. The yield and tensile stress values utilize to determine the maximum allowable running pressure and wall thickness required. The tubes and pipes are delivered the actual yield and tensile stress values are verified from the true copy material certificates. Pressure reduction factors at various temperatures show below:


° C 
-40 
120 
150 
175 
200 
250
° F 
-40 
248 
302 
347  
392
482
Rating Factor 
0.90 
1.0 
0.89 
0.89 
0.83
 NA



Seamless hydraulic tube (ST37.4 NBK) Working Pressure Table:


No.

Description

Working Pressure (Bar)

Burst Pressure

(Bar)

IMPA CODE

1

4MM OD x 1.0MM THK x 6 MTR

707

1755

710701

2

5MM OD x 1.0MM THK x 6 MTR

565

1404

-

3

6MM OD x 1.0MM THK x 6 MTR

471

1170

710702

4

6MM OD x 1.5MM THK x 6 MTR

707

1755

710703

5

8MM OD x 1.0MM THK x 6 MTR

353

878

710704

6

8MM OD x 1.5MM THK x 6 MTR

530

1316

710705

7

8MM OD x 2.0MM THK x 6 MTR

707

1755

710706

8

8MM OD x 2.5MM THK x 6 MTR

883

2194

-

9

10MM OD x 1.0MM THK x 6 MTR

283

702

710707

10

10MM OD x 1.2MM THK x 6 MTR

339

845

710708

11

10MM OD x 1.5MM THK x 6 MTR

424

1053

710709

12

10MM OD x 2.0MM THK x 6 MTR

565

1404

710710

13

10MM OD x 2.5MM THK x 6 MTR

707

1755

-

14

12MM OD x 1.0MM THK x 6 MTR

236

585

710711

15

12MM OD x 1.2MM THK x 6 MTR

283

702

710712

16

12MM OD x 1.5MM THK x 6 MTR

353

878

710713

17

12MM OD x 2.0MM THK x 6 MTR

471

1170

710714

18

12MM OD x 2.5MM THK x 6 MTR

589

1463

-

19

12MM OD x 3.0MM THK x 6 MTR

707

1755

-

20

14MM OD x 1.5MM THK x 6 MTR

303

752

-

21

14MM OD x 2.0MM THK x 6 MTR

404

1003

-

22

14MM OD x 2.5MM THK x 6 MTR

505

1254

-

23

14MM OD x 3.0MM THK x 6 MTR

606

1504

-

24

14MM OD x 4.0MM THK x 6 MTR

807

2006

-

25

15MM OD x 1.0MM THK x 6 MTR

188

468

-

26

15MM OD x 1.2MM THK x 6 MTR

226

562

710715

27

15MM OD x 1.5MM THK x 6 MTR

283

702

710716

28

15MM OD x 2.0MM THK x 6 MTR

377

936

710717

29

15MM OD x 2.5MM THK x 6 MTR

471

1170

710718

30

15MM OD x 3.0MM THK x 6 MTR

565

1404

-

31

16MM OD x 1.5MM THK x 6 MTR

265

658

710719

32

16MM OD x 2.0MM THK x 6 MTR

353

878

710720

33

16MM OD x 3.0MM THK x 6 MTR

530

1316

-

34

18MM OD x 1.5MM THK x 6 MTR

236

585

710721

35

18MM OD x 2.0MM THK x 6 MTR

314

780

710722

36

18MM OD x 2.5MM THK x 6 MTR

393

975

710723

37

18MM OD x 3.0MM THK x 6 MTR

471

1170

-

38

20MM OD x 2.0MM THK x 6 MTR

283

702

710724

39

20MM OD x 2.5MM THK x 6 MTR

353

878

710725

40

20MM OD x 3.0MM THK x 6 MTR

424

1053

710726

41

20MM OD x 3.5MM THK x 6 MTR

495

1229

-

42

20MM OD x 4.0MM THK x 6 MTR

565

1404

-



No.

Description

Working Pressure (Bar)

Burst Pressure

(Bar)

IMPA CODE

43

20MM OD x 4.5MM THK x 6 MTR

636

1580

-

44

20MM OD x 5.0MM THK x 6 MTR

707

1755

-

45

22MM OD x 2.0MM THK x 6 MTR

257

638

710727

46

22MM OD x 2.5MM THK x 6 MTR

321

798

-

47

22MM OD x 3.0MM THK x 6 MTR

385

957

710728

48

22MM OD x 4.0MM THK x 6 MTR

514

1276

-

49

25MM OD x 2.0MM THK x 6 MTR

226

562

710729

50

25MM OD x 2.5MM THK x 6 MTR

283

702

710730

51

25MM OD x 3.0MM THK x 6 MTR

339

842

710731

52

25MM OD x 3.5MM THK x 6 MTR

396

983

-

53

25MM OD x 4.0MM THK x 6 MTR

452

1123

-

54

25MM OD x 5.0MM THK x 6 MTR

565

1404

-

55

28MM OD x 2.0MM THK x 6 MTR

202

501

-

56

28MM OD x 2.5MM THK x 6 MTR

252

627

710732

57

28MM OD x 3.0MM THK x 6 MTR

303

752

-

58

28MM OD x 4.0MM THK x 3 MTR

404

1003

-

59

28MM OD x 5.0MM THK x 6 MTR

505

1254

-

60

30MM OD x 2.0MM THK x 6 MTR

188

468

-

61

30MM OD x 2.5MM THK x 6 MTR

236

585

710733

62

30MM OD x 3.0MM THK x 6 MTR

283

702

-

63

30MM OD x 4.0MM THK x 6 MTR

377

936

-

64

30MM OD x 5.0MM THK x 6 MTR

471

1170

-

65

35MM OD x 2.0MM THK x 6 MTR

161

401

-

66

35MM OD x 2.5MM THK x 6 MTR

202

501

710734

67

35MM OD x 3.0MM THK x 6 MTR

242

602

-

68

35MM OD x 4.0MM THK x 6 MTR

323

802

710735

69

35MM OD x 5.0MM THK x 6 MTR

404

1003

-

70

38MM OD x 3.0MM THK x 6 MTR

223

554

-

71

38MM OD x 4.0MM THK x 6 MTR

297

739

-

72

38MM OD x 5.0MM THK x 6 MTR

372

924

-

73

42MM OD x 2.0MM THK x 6 MTR

135

334

-

74

42MM OD x 3.0MM THK x 6 MTR

202

501

-

75

42MM OD x 4.0MM THK x 6 MTR

269

669

710736

76

42MM OD x 5.0MM THK x 6 MTR

336

836

-

77

50MM OD x 3.0MM THK x 6 MTR

170

421

-

78

50MM OD x 5.0MM THK x 6 MTR

283

702

-

79

60MM OD x 3.0MM THK x 6 MTR

141

351

-

80

60MM OD x 5.0MM THK x 6 MTR

236

585

-

81

65MM OD x 6.0MM THK x 6 MTR

261

648

-

82

75MM OD x 3.0MM THK x 6 MTR

113

281

-

83

1/8"NB x 2.41MM THK x 6 MTR

649

1611

-

84

1/4"NB x 3.02MM THK x 6 MTR

618

1536

-


No.

Description

Working Pressure (Bar)

Burst Pressure

(Bar)

IMPA CODE

85

3/8"NB x 3.2MM THK x 6 MTR

523

1298

-

86

1/2"NB x 3.0MM THK x 6 MTR

391

971

-

87

3/4"NB x 3.0MM THK x 6 MTR

312

774

-

88

1"NB x 3.5MM THK x 6 MTR

291

723

-

89

1"NB x 4.55MM THK x 6 MTR

378

939

-

90

1 1/4"NB x 4.85MM THK x 6 MTR

321

797

-

91

1 1/2"NB x 5.08MM THK x 6 MTR

295

734

-

92

2 1/2"NB x 6.3MM THK x 6 MTR

NIL

580

-

93

1/4"OD x 1.2MM THK x 6 MTR

534

1327

-

94

1/4"OD x 1.5MM THK x 6 MTR

668

1658

-

95

3/8"OD x 1.22MM THK x 6 MTR

362

899

-

96

3/8"OD x 1.5MM THK x 6 MTR

445

1105

-

97

1/2"OD x 1.5MM THK x 6 MTR

334

829

-

98

3/4"OD x 2.0MM THK x 6 MTR

297

737

-

99

3/4"OD x 2.64MM THK x 6 MTR

392

973

-

100

1"OD x 3.0MM THK x 6 MTR

334

829

-

101

1 1/4"OD x 3.0MM THK x 6 MTR

267

663

-

102

1 1/4"OD x 3.25MM THK x 6 MTR

289

719

-


Hydraulic Tube (ST52.4 NBK) Working Pressure Table:


No.

Description

Working Pressure (Bar)

Burst Pressure

(Bar)

IMPA CODE

103

10MM OD x 2.0MM THK x 6 MTR

799

1919

710710

104

12MM OD x 2.0MM THK x 6 MTR

666

1599

710714

105

14MM OD x 1.5MM THK x 6 MTR

428

1028

-

106

14MM OD x 2.0MM THK x 6 MTR

571

1371

-

107

15MM OD x 1.5MM THK x 6 MTR

400

959

710716

108

15MM OD x 2.0MM THK x 6 MTR

533

1279

710717

109

15MM OD x 2.5MM THK x 6 MTR

666

1599

710718

110

16MM OD x 1.5MM THK x 6 MTR

375

899

710719

111

16MM OD x 2.0MM THK x 6 MTR

500

1199

710720

112

16MM OD x 3.0MM THK x 6 MTR

749

1799

-

113

18MM OD x 1.5MM THK x 6 MTR

333

800

710721

114

18MM OD x 2.0MM THK x 6 MTR

444

1066

710722

115

20MM OD x 2.0MM THK x 6 MTR

400

959

710724

116

20MM OD x 2.5MM THK x 6 MTR

500

1199

710725

117

20MM OD x 3.0MM THK x 6 MTR

599

1439

710726

118

22MM OD x 2.0MM THK x 6 MTR

363

872

710727

119

25MM OD x 2.0MM THK x 6 MTR

320

768

710729

120

25MM OD x 2.5MM THK x 6 MTR

400

959

710730

121

25MM OD x 3.0MM THK x 6 MTR

480

1151

710731

122

25MM OD x 4.0MM THK x 6 MTR

639

1535

-

123

25MM OD x 5.0MM THK x 6 MTR

799

1919

-

124

28MM OD x 2.0MM THK x 6 MTR

285

685

-

125

28MM OD x 3.0MM THK x 6 MTR

428

1028

-

126

30MM OD x 2.0MM THK x 6 MTR

266

640

-

127

30MM OD x 3.0MM THK x 6 MTR

400

959

-

128

30MM OD x 4.0MM THK x 6 MTR

533

1279

-

129

35MM OD x 3.0MM THK x 6 MTR

343

822

-

130

35MM OD x 4.0MM THK x 6 MTR

457

1096

710735

131

38MM OD x 3.0MM THK x 6 MTR

315

757

-

132

38MM OD x 4.0MM THK x 6 MTR

421

1010

-

133

38MM OD x 5.0MM THK x 6 MTR

526

1262

-

134

42MM OD x 3.0MM THK x 6 MTR

285

685

-

135

42MM OD x 4.0MM THK x 6 MTR

381

914

710736

136

42MM OD x 5.0MM THK x 6 MTR

476

1142

-

137

45MM OD x 5.0MM THK x 6 MTR

444

1066

-

138

50MM OD x 5.0MM THK x 6 MTR

400

959

-

139

50MM OD x 6.0MM THK x 6 MTR

480

1151

-

140

50MM OD x 10.0MM THK x 6 MTR

799

1919

-

141

54MM OD x 6.0MM THK x 6 MTR

444

1066

-

142

60MM OD x 5.0MM THK x 6 MTR

333

800

-

143

60MM OD x 6.0MM THK x 6 MTR

400

959

-


No.

Description

Working Pressure (Bar)

Burst Pressure

(Bar)

IMPA CODE

144

65MM OD x 8.0MM THK x 6 MTR

492

1181

-

145

66MM OD x 8.5MM THK x 6 MTR

515

1236

-

146

76.1MM OD x 6.3MM THK x 6 MTR

331

794

-

147

80MM OD x 10.0MM THK x 6 MTR

500

1199

-

148

90MM OD x 5.0MM THK x 6 MTR

222

533

-

149

90MM OD x 10.0MM THK x 6 MTR

444

1066

-

150

97MM OD x 12.0MM THK x 6 MTR

494

1187

-

151

100MM OD x 10.0MM THK x 6 MTR

400

959

-

152

115MM OD x 15.0MM THK x 6 MTR

521

1251

-

153

120MM OD x 12.0MM THK x 6 MTR

400

959

-

154

130MM OD x 15.0MM THK x 6 MTR

461

1107

-

155

150MM OD x 15.0MM THK x 6 MTR

400

959

-

156

190MM OD x 20.0MM THK x 6 MTR

421

1010

-

157

2"OD x 5.9MM THK x 6 MTR

464

1114

-

158

2"OD x 6.0MM THK x 6 MTR

472

1133

-


Seamless hydraulic tube


Seamless hydraulic tube


Seamless hydraulic tube


Seamless hydraulic tube

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