Air conditioning and refrigeration inner grooved copper tube (LWC)
Nacobre Denomination: 122
Designation: Phosphorus Deoxidized
High Residual Phosphorus(DHP)

Nacobre inner grooved tube is a seamless and welded copper tube with smooth O.D. surface and helical, integral ridges on the I.D. for enhanced heat transfer. The internal ridges significantly improve the efficiency of heat exchangers in which refrigerant condenses or evaporates within the tube. Typical applications include fin and tube evaporator and condenser coils for air conditioners, freezers, and refrigerators.
FEASIBLE DIMENSION

DESIGNATION

OUTSIDE DIAMETER (OD)

BOTTOM WALL (WT)

NR. OF GROOVES

HIGH OF GROOVE (H)

HELIX ANGLE ( β )

275-10-28S50

0.275” (7.00 mm)

0.010” (0.25mm)

50

0.008” (0.20 mm)

18°

275-11-28S50

0.275” ( 7.00 mm)

0.011” (0.28mm)

50

0.008” (0.20 mm)

18°

312-12-28S60

0.312” ( 7.94 mm)

0.012” (0.30mm)

60

0.008” (0.20 mm)

18°

375-12-28S60

0.375” ( 9.52 mm)

0.012” (0.30mm)

60

0.008” (0.20 mm)

18°

375-12-28S42

0.375” ( 9.52 mm)

0.012” (0.30mm)

42

0.008” (0.20 mm)

18°

375-13-28S60

0.375” ( 9.52 mm)

0.013” (0.33mm)

60

0.008” (0.20 mm)

18°

375-14-28S60

0.375” ( 9.52 mm)

0.014” (0.36mm)

60

0.008” (0.20 mm)

18°

375-16-28S60

0.375” ( 9.52 mm)

0.016” (0.41mm)

60

0.008” (0.20 mm)

18°

375-18-28S60

0.375” ( 9.52 mm)

0.018” (0.46mm)

60

0.008” (0.20 mm)

18°

500-16-28S60

0.500” (12.70 mm)

0.016” (0.41mm)

60

0.008” (0.20 mm)

18°

625-20-48S60

0.625” (15.87 mm)

0.020” (0.51mm)

60

0.012” ( 0.30 mm)

27°

625-23-48S60

0.625” (15.87 mm)

0.023” (0.58mm)

60

0.012” ( 0.30 mm)

27°

WELDED INNER GROOVED TUBE

275-10-28W54

0.275” ( 7.00 mm)

0.010” (0.25mm)

54

0.008” ( 0.20 mm)

18°

312-12-29W60

0.312” ( 7.94 mm)

0.012” (0.30mm)

60

0.008” ( 0.20 mm)

18°

375-12-28W42

0.375” ( 9.52 mm)

0.012” (0.30mm)

42

0.008” ( 0.20 mm)

18°

375-12-15W62

0.375” ( 9.52 mm)

0.012” (0.30mm)

62

0.010” ( 0.25 mm)

0°

375-12-29W72

0.375” ( 9.52 mm)

0.012” (0.30mm)

72

0.008” ( 0.20 mm)

20°

WELDED CROSS HATCH INNER GROOVED TUBE

375-12-28CHH44

0.375” ( 9.52 mm)

0.012” (0.30mm)

44

0.010” ( 0.25 mm)

20°

375-12-28CHL44

0.375” ( 9.52 mm)

0.012” (0.30mm)

44

0.010” ( 0.25 mm)

20°

375-12-15CHL62

0.375” ( 9.52 mm)

0.012” (0.30mm)

62

0.010” ( 0.25 mm)

0°


CHEMICAL COMPOSITION

Alloy

Cu (%)

P(%)

C12200

99.9

0.015 - 0.040

MECHANICAL PROPERTIES

Alloy

Temper

Tensile Strength (ksi)

Yield Strenght (ksi)

Expansion

Elongation

Averagen grain size (mm)

C12200

H58

36 Min.

30 Min.

N/A

N/A

N/A

C12200

O50

30 Min.

7 Min.

40% Min.

40% Min.

0.040 Max.

C12200

O60

30 Min.

6 Min.

40% Min.

40% Min.

0.040 Min


Note: H58 Temper after grooved

PHYSICAL PROPERTIES


 

UNITS

C12200

MELTING POINT (LIQUIDUS)

°F (°C)

1981 (1083)

MELTING POINT (SOLIDUS)

°F (°C)

DENSITY (TO 20°C)

Lb/cu,in

.323

COEFICIENT OF THERMAL EXPANSION

per °F From 68 to 572

9.8 x 10 –6

THERMAL CONDUCTIVITY

Btu/sq.ft./ft/hr/°F to 68°F

196

ELECTRICAL RESISTIVITY (ANNEALED)

Ohms (circ.mil./ft) to 68 °F

12.2

ELECTRICAL CONDUCTIVITY (ANNEALED)

% IACS to 68°F

85

THERMAL CAPACITY (SPECIFIC HEAT)

Btu/lb/°F to 68|°F

0.09

MODULUS OF ELASTICITY (TENSION))

Ksi

17000

MODULUS OF RIGIDITY

Ksi

6400

ANNEALED TEMPERATURE

°F - °C

700-1200 -375-650

SUITABILITY FOR BEING JOINED BY

 

Alloy

Soldering

Brazing

Oxyacetylene Welding

Carbon Arc Welding

Gas Shielded Arc Welding

C12200

Excellent

Excellent

Good

Good

Excellent


 

 

 

 

 

Alloy

Coated Metal Arc Welding

Resistance welding

Spot

Seam

Butt

C12200

Not recommended

Not recommended

Not recommended

Good

DECIMAL EQUIVALENTS IN INCHES FOR VARIOUS GAGES

Gage No..

1

2

3

4

5

6

7

8

9

BWG

.0.300

0.284

0.259

0.238

.0.220

0.203

0.180

0.165

0.148

AWG

0.2893

0.2576

0.2294

0.2043

0.1819

0.162

0.1443

0.1285

0.1144


Gage No..

10

11

12

13

14

15

16

17

18

BWG

0.134

0.120

0.109

0.095

0.083

0.072

0.065

0.058

0.049

AWG

0.1019

0.0907

0.0808

0.0720

0.0641

0.0571

0.0508

0.0453

0.0403


Gage No..

19

20

21

22

23

24

BWG

0.042

0.035

0.032

0.028

0.025

0.022

AWG

0.0359

0.0320

0.0285

0.0253

0.0226

0.0201

NON DESTRUCTIVE TESTS AVAILABLE
EDDY CURRENT TEST HYDROSTATIC TEST PNEUMATIC TEST

MAXIMUM WORK PRESSURE
P = Maximum work pressure (psi)
S = Minimum tensile strength of material for an specific temper (It is the the value of the tensile strength in psi in Mechanica properties table)
D = Exterior diameter of tube
T = Bottom wall thickness of tube

Note: The cracking pressure is the value of 5 times the work pressure

APPLICABLES STANDARDS
ASTM
ASME
BRITISH STANDARD
DIN
JIS
MIL
NFA
ISO