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EN 12735 Seamless, Round Copper Tubes for Air Conditioning and Refrigeration - Dimensions

Dimensions of seamless, round copper tubes for air conditioning and refrigeration piping systems.

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Dimensions of copper tubes according EN 12735 Copper and copper alloys. Seamless, round copper tubes for air conditioning and refrigeration. Tubes for piping systems:

Nominal Outside Diameter
- d -
Nominal Wall Thickness - e - (mm)
Metric SeriesImperial Series
(mm)(mm)(in)0.81.01.251.51.652.02.5
3.18 1/8 C
3.97 5/32 C C
4.76 3/16 C
6 S, C C
6.35 1/4 C C
7.94 5/16 C C
8 S, C C
9.52 3/8 C C
10 S, C S, C
12 S, C
12.7 1/2 C S, C
15 S, C
15.87 5/8 S, C
18 S, C
19.06 3/4 C S
22 S, C
22.3 7/8 C S
25.4 1 S
28 S
28.57 1 1/8 S S
34.92 1 3/8 S
35 S
41.27 1 5/8 S
42 S
53.97 2 1/8 S S
54 S
64 S
66.67 2 5/8 S S S
76.1 S
79.37 3 1/8 S S
88.90 3 1/2 S
92.07 3 5/8 S S
104.80 4 1/8 S S
108 S

Recommended

  • S - available in straight lengths
  • C - available in coils
  • 1 inch = 25.4 mm

Example - Designation of EN 12735 Copper Tube

  • Copper tube EN 12735 R290 15×1.0

where R290 is material temper.

Material Temper

Material TemperTensile StrengthElongation min.Vickers Hardness
DesignationCommonly used term(MPa)(%)HV5
R220 annealed, soft 40 40 - 70
R250 half hard 250 30 75 - 100
R290 hard 290 3 over 100
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  • Engineering ToolBox, (2018). EN 12735 Seamless, Round Copper Tubes for Air Conditioning and Refrigeration - Dimensions. [online] Available at: https://www.engineeringtoolbox.com/EN-12735-copper-tubes-air-conditioning-refrigeration-d_2127.html [Accessed Day Mo. Year].

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