Copper Fin Tubes

Low/Medium High Fin

Internal Fin

Corrugated Fin

Inner Star Fin

High Performance Fin CH-B

High Performance Fin EH-B

Low/Medium High Fin

Integral external fins giving increased external surface area. Used in condensers, evaporators, oil coolers, air coolers, air conditioning equipment. Typical sizes for low fin tubes are given in the table below, other sizes are possible. Medium high fins are available on tubes 15.88mm od to 22.22mm od, 10 to 11 fins per inch and fin heights up to 8mm. For additional details see page Low Fin Tubes or page Medium High Fin Tubes.

Plain ends		Finned section
Outside diameter (D)	Wall thickness (t)	Outside diameter (df)	Wall thickness (Tf)	Root diameter (dr)	Fins/inch
12.7	1.7	12.7	1.24	9.6	16 - 40
15.88	1.7	15.88	1.24	12.7	16 - 40
19.05	1.7	19.05	1.24	15.88	16 - 40
22.22	1.7	22.22	1.24	19.05	16 - 40
25.4	1.75	25.4	1.24	22.22	16 - 40

Internal Fin

Integral internal copper fins of 2.5mm to 3mm height give improved heat transfer and excellent reistance to vibration. Used in water coolers, evaporators, refrigerators, air conditioning equipment. Typical sizes are given in the adjacent table, other sizes are possible.

	Tube outside diameter
	12.7	15.88	19.05	22.22
T_w	0.55	0.6	0.6	0.6
H_f	0.25	0.3	0.3	0.3
No of fins	60	80	92	112
Angle (β)	18°	18°	18°	18°
Angle (α)	40°	40°	40°	40°

Corrugated Fin

Internal and external spiral corrugated copper fins of 0.5mm to 1.5mm height create progressive turbulence giving a high degree of thermal conductivity. Particularly suitable for use in fluid to fluid, gas to gas heat exchange. Used in air conditioning exchangers and chiller units. Typical sizes are given in the table below, other sizes are possible.

Material	Copper
Temper	Hard, half hard, annealed
Outside diameter of plain ends (D)	9.53mm to 25.4mm
Thickness of plain ends (T)	0.5mm to 2.0mm
Pitch of corrugations (P)	3mm to 10mm
Depth of corrugations (H)	0.5mm to 1.5mm
Number of treads	1 to 3
Length (L)	500mm to 6000mm
The length of plain ends and interim lands to suit clients' requirements

Inner Star Fin

A thermal conduction tube in which aluminium moulded fins are annealed processed inside the copper tube to give increased surface area. Used in evaporators and condensers on chiller units. Typical sizes are given in the table below, other sizes are possible.

Material outer tube	Copper half hard
Material fin	Aluminium alloy
Outside diameter	16mm to 19mm
Tube thickness	0.8mm to 1.0mm
Number of fins	5 or 10
Length	Up to 8000mm
End rebate	To suit clients' requirements

High Performance CH-B

A tube having integral external fins 26 to 40 fins per inch and increased fin height with a trapezoidal shape plus integral internal fins. Used in codensers, double type heat exchangers. Typical sizes are given in the table below, other sizes are possible.

Plain End		Fin Details			Finned Section
Outside diameter (D_o)	Wall thickness (T_w)	Fins/inch (A)	No. of ridges	Depth of ridges	Outside diameter (D_f)	Root diameter (D_r)	Wall thickness	Fin height (F_w)
19.05	1.25	26	10	0.3	18.8	16.4	0.6	1.2
19.05	1.25	33	30	0.3	18.8	16.4	0.6	1.2
19.05	1.25	40	38	0.3	18.8	16.4	0.6	1.2

High Performance EH-B

A tube having integral external fins 42 fins per inch with fine openings in the external skin and circumferential tunnels plus integral internal fins. Used in condensers. Typical sizes are given in the table below, other sizes are possible

Plain End		Fin Details			Finned Section
Outside diameter (D_o)	Wall thickness (T_w)	Fins/inch (A)	No. of ridges	Depth of ridges	Outside diameter (D_f)	Root diameter (D_r)	Wall thickness	Fin height (F_w)
19.05	1.25	42	38	0.35	18.5	15.8	0.6	0.64
18.88	1.20	42	30	0.35	18.15	15.6	0.6	0.64