Seamless tubes

  

Smooth walls for flow continuity:

 The extrusion manufacturing process provides tubes with smooth and plain walls, which combined with internal scaling prevention, enable conveyance of fluids with minimum pressure losses, maintaining the same flow during the useful life of the installation.

Resistance to internal working pressures:

Copper tubes are seamless, enabling a minimum wall thickness calculated to withstand completely the working pressures present in any installation, in addition to offering a safety factor of 5 times the continuous working pressure.

Resistance to Corrosion

 Due to its characteristics, copper is undoubtedly the adequate metal for tube manufacturing. Copper has the distinctive feature of a rust layer coating, which penetrates metal in only a few microns. This layer acts as an indefinite protection, thus the excellent performance of copper tubes with all construction materials and fluids conveyed, ensuring a long useful life

Manufactured in rigid and flexible temper

Rigid : straight lengths of 6.10 m (20 feet)
Flexible :rolls of 15.24 m (50 feet) and 18.30 m (60 feet) long with the possibility of manufacturing other lengths according to market needs

Light weight

  

Easy to join

 Due to the joining methods used in copper tubes - capillary soldering and compression in rigid tubes, flare at 45° and compression in flexible tubes - as well as the light weight of the material and the use of minimum and light tools, joints are performed easily and fast

Composition of copper used in Nacobre tubes

  
Alloy C12200
Trade Name Phosphorous copper
Copper 99.90 % (Cu + Ag with specified elements)
Phosphorus 0.015 a 0.040 %

Physical characteristics of copper used in Nacobre tubes
Melting temperature 1,083 ºC

Density (20ºC)

 8.94 gr/cm3
Thermal conductivity (68 ºF): 196 BTU/ft2/ft/hr/ºF
Specific heat (20 ºC): 0.092 Cal/gr/ºC

                                          Internal Working Pressures (kg/cm2)
Rigid Copper Tube  

OPERATING TEMPERATURE

NOMINAL

OUTSIDE
10 C (50 F)
37.8 C (100 F)

DIAMETER

DIAMETER

S = 682.14 kg/cm2

S = 421.94 kg/cm2

TUBE TYPE
pulg
mm
pulg
mm
M
L
K
M
L
K
1/4

6.

35

  
3/8
9.
 525

87.

961

104.

264

122.

839

54.

409

64.

493

75.

983
3/8

9.

5

  
1/2
12.
 700

65.

131

88.

952

129.

198

40.

287

55.

022

79.

916
1/2

12.

7

  
5/8
15.
 875

56.

375

82.

340

101.

816

34.

871

50.

932

62.

979
3/4

19

    
7/8
22.
 225

46.

473

66.

389

97.

264

28.

746

41.

065

60.

163
1

25

  
1
1/8
28. 575

38.

421

56.

375

74.

703

23.

765

34.

871

46.

208
1
1/4

32

  
1
3/8
34.
 925

38.

548

50.

061

60.

638

23.

844

30.

966

37.

508
1
1/2

38

  

1

5/8

41.
 275

37.

772

46.

588

56.

375

23.

364

28.

817

34.

871
2

51

  

2

1/8

53.
 975

34.

056

41.

424

49.

550

21.

066

25.

623

30.

649
2
1/2

64

  

2

5/8

66.
 675

31.

234

38.

264

45.

351

19.

320

23.

668

28.

052
3

76

  
3
1/8
79.
 375

28.

857

36.

104

43.

881

17.

850

22.

332

27.

143
4

102

  
4
1/8
104.
 775

28.

584

33.

389

40.

975

17.

681

20.

653

25.

345

OPERATING TEMPERATURE

NOMINAL

OUTSIDE
148.9 C (300 F)
204.4 C (100 F)

DIAMETER

DIAMETER

S = 330.52 kg/cm2

S = 210.97 kg/cm2
TUBE TYPE
pulg
mm
pulg
mm
M
L
K
M
L
K
1/4

6.

35

  
3/8

9.

525

 46. 248

54.

819

64.

585

43.

527

51.

594

 60. 786
3/8

9.

5

  
1/2

12.

700

 34. 244

46.

769

67.

929

32.

230

44.

017

 63. 933
1/2

12.

7

  
5/8

15.

875

 29. 640

43.

292

53.

532

27.

897

40.

746

 50. 383
3/4

19

    
7/8

22.

225

 24. 434

34.

906

51.

139

22.

997

32.

852

 48. 131
1

25

  
1
1/8

28.

575

 20. 201

29.

640

39.

277

19.

012

27.

897

 36. 966
1
1/4

32

  
1
3/8

34.

925

 20. 267

26.

321

31.

882

19.

075

24.

773

 30. 006
1
1/2

38

  

1

5/8

41.

275

 19. 860

24.

495

29.

640

18.

691

23.

054

 27. 897
2

51

  

2

1/8

53.

975

 17. 906

21.

780

26.

052

16.

853

20.

499

 24. 520
2
1/2

64

  

2

5/8

66.

675

 16. 422

20.

118

23.

845

15.

456

18.

935

 22. 442
3

76

  
3
1/8

79.

375

 15. 172

18.

982

23.

071

14.

280

17.

866

 21. 714
4

102

  
4
1/8

104.

775

 15. 028

17.

555

21.

544

14.

144

16.

522

 20. 276

OPERATING TEMPERATURE

NOMINAL

OUTSIDE
148.9 C (300 F)
204.4 C (100 F)

DIAMETER

DIAMETER

S = 330.52 kg/cm2

S = 210.97 kg/cm2
TUBE TYPE
pulg
mm
pulg
mm
M
L
K
M
L
K
1/4

6.

35

  
3/8

9.

525

42.

620

50.

520

59.

520

 27. 205

32.

247

37.

991
3/8

9.

5

  
1/2

12.

700

31.

558

43.

100

62.

601

 20. 144

27.

511

39.

958
1/2

12.

7

  
5/8

15.

875

27.

316

39.

897

49.

333

 17. 436

25.

466

31.

489
3/4

19

    
7/8

22.

225

22.

518

32.

168

47.

128

 14. 373

20.

533

30.

082
1

25

  
1
1/8

28.

575

18.

616

27.

316

36.

196

 11. 883

17.

436

23.

104
1
1/4

32

  
1
3/8

34.

925

18.

678

24.

256

29.

381

 11. 922

15.

483

18.

754
1
1/2

38

  

1

5/8

41.

275

18.

302

22.

574

27.

316

 11. 682

14.

409

17.

436
2

51

  

2

1/8

53.

975

16.

502

20.

071

24.

009

 10. 533

12.

812

15.

325
2
1/2

64

  

2

5/8

66.

675

15.

134

18.

540

21.

974

 9. 660

11.

834

14.

026
3

76

  
3
1/8

79.

375

13.

982

17.

494

21.

262

 8. 925

11.

166

13.

571
4

102

  
4
1/8

104.

775

13.

850

16.

178

19.

854

 8. 840

10.

326

12.

673

Note: These values are based on tube strength only, and are applicable to systems using adequate mechanic joints.

The working pressure values calculated above are given in kg/cm2; if you require this pressure in lb/sq in, multiply the applicable value times 14.22
The formula used for calculation of internal pressure is :

Where:
emin = Minimum wall thickness in mm
P = Allowable pressure in kg/cm2
D = Outside diameter in mm
S = Allowable stress in kg/cm2

  
                                                 Internal Working Pressures (kg/cm2)

Flexible Copper Tube, Refrigeration Type, General Purpose and Automotive Uses

  

OPERATING TEMPERATURE
NOMINAL OUTSIDE 10 C (50 F) 37.8 C (100 F) 65.2 C (150 F)
DIAMETER DIAMETER

S = 682.14 kg/cm2

S = 421.94 kg/cm2

 S = 358.65kg/cm2
TUBE TYPE
pulg mm pulg mm refig U.gen refig U.gen refig U.gen

1/

8

3.

175

1/

8

3.

175

356.

37

356.

37

220.

43

220.

43

187.

37

187.

37

3/

16

4.

763

3/

16

4.

763

222.

11

222.

11

137.

39

137.

39

116.

78

116.

78

1/

4

6.

350

1/

4

6.

350

161.

33

161.

33

99.

79

99.

79

84.

82

84.

82

5/

16

7.

938

5/

16

7.

938

136.

84

136.

84

84.

64

84.

64

71.

95

71.

95

3/

8

9.

525

3/

8

9.

525

112.

53

112.

53

69.

60

69.

60

59.

16

59.

16

1/

2

12.

700

1/

2

12.

700

83.

03

83.

03

51.

36

51.

36

43.

65

43.

65

5/

8

15.

875

5/

8

15.

875

70.

43

70.

43

43.

56

43.

56

37.

03

37.

03

3/

4

19.

050

3/

4

19.

050

58.

29

58.

29

36.

05

36.

05

30.

65

30.

65
OPERATING TEMPERATURE
NOMINAL OUTSIDE 121.1C (250 F) 176.7 C (350 F) 204.4 C (150 F)
DIAMETER DIAMETER

S = 334.74 kg/cm2

S = 286.22 kg/cm2

 S = 210.97kg/cm2
TUBE TYPE
pulg mm pulg mm refig U.gen refig U.gen refig U.gen

1/

8

3.

175

1/

8

3.

175

176.

35

176.

35

172.

67

172.

67

110.

22

110.

22

3/

16

4.

763

3/

16

4.

763

109.

91

109.

91

107.

62

107.

62

68.

69

68.

69

1/

4

6.

350

1/

4

6.

350

79.

83

79.

83

78.

17

78.

17

49.

90

49.

90

5/

16

7.

938

5/

16

7.

938

67.

71

67.

71

66.

30

66.

30

42.

32

42.

32

3/

8

9.

525

3/

8

9.

525

55.

68

55.

68

54.

52

54.

52

34.

80

34.

80

1/

2

12.

700

1/

2

12.

700

41.

08

41.

08

40.

23

40.

23

25.

68

25.

68

5/

8

15.

875

5/

8

15.

875

34.

85

34.

85

34.

12

34.

12

21.

78

21.

78

3/

4

19.

050

3/

4

19.

050

28.

84

28.

84

28.

24

28.

24

18.

03

18.

03

Note: These values are based on tube strength only, and are applicable to systems using adequate mechanic joints.
                                                Internal Working Pressures (kg/cm2)
Flexible Copper Tube, Type L    
OPERATING TEMPERATURE
NOMINAL OUTSIDE 10 C (50F) 37.8 C (100F) 65.2 C (150F)
DIAMETER DIAMETER S=682.14kg/cm2 S=421.94kg/cm2 358.65kg/cm2
pulg mm pulg mm      

1/

4

6.

35

3/

8

9.

525

104

.3

64

.5

54.

8

3/

8

9.

5

1/

2

12.

700

89.

0

55

.0

46.

8

1/

2

12.

7

5/

8

15.

875

82.

3

50

.9

43.

3

3/

4

19

  

7/

8

22.

225

66.

4

41

.1

34.

9

1

 

25

  

1

1/8

28.

575

56.

4

34

.9

29.

6

OPERATING TEMPERATURE
NOMINAL OUTSIDE

121.1 C (250 F)

176.7 C(350 F)

204.4 C(400 F)
DIAMETER DIAMETER S=334.74 Kg/cm2

S=286.22 Kg/cm2

210.97 kg/cm2
pulg mm pulg mm      

1/

4

6.

35

3/

8

9.

525

51.

6

50

.5

32.

2

3/

8

9.

5

1/

2

12.

700

44.

0

43

.1

27.

5

1/

2

12.

7

5/

8

15.

875

40.

7

39

.9

25.

5

3/

4

19

  

7/

8

22.

225

32.

9

32

.2

20.

5

1

 

25

  

1

1/8

28.

575

27.

9

27

.3

17.

4

Note: These values are based on tube strength only, and are applicable to systems using adequate mechanic joints.