COPPER TUBES FOR REFRIGERATION AND AIR CONDITIONING SYSTEMS
![]() |
DIN EN 12735-1:2001 Copper and copper alloys. Seamless pipes made from copper for refrigeration and air conditioning equipment. Part 1: Pipes for conducting systems.
DIN EN 12735-2:2001 Copper and copper alloys. Seamless pipes made from copper for refrigeration and air conditioning equipment. Part 2: Pipes for machine.
Designation Standard |
Mark |
* Outside diameter, mm |
* Wall thickness, mm |
The length of pipe in the bay, * m |
State |
DIN EN 12735-1: 2001 |
Cu-DHP |
4,75-25 |
0,35-2,5 |
25; 50 |
R220, R290 |
DIN EN 12735-2: 2001 |
Cu-DHP |
6-25 |
0,5-2,5 |
Upon request |
Y040, Y035 |
The geometric dimensions of DIN EN 12735-1:2001, DIN EN 12735-2:2001.
State and mechanical properties of the material:
1. On DIN EN 12735-1:2001
State |
Ultimate
|
Relative
|
R220 |
220 |
40 |
R290 |
290 |
3 |
Note 1: According to the requirements of BS EN 1173:1996 basic property of the states designated R - temporary resistance. |
2. On DIN EN 12735-2:2001
State |
0.2% yield strength R p0, 2
|
Strength at
|
Strength at
|
Grain size
|
Y040 |
40-90 |
220 |
40 |
15-40 |
Y035 |
35-80 |
210 |
40 |
30-60 |
Note 1: According to the requirements of BS EN 1173:1996 for basic property of the state, designated Y - 0,2%-yield strength in tension.
Note 2: The technology of production of pipes DIN EN 12735-2:2001 states Y040, Y035 in the stage of mining. |
In agreement with the consumer pipes can be manufactured in coils layered ordered winding or coils flat spiral winding.
Surface Quality
The outer and inner surface of the pipe must be clean and smooth.
If necessary, the inner surface of pipes for air conditioning and refrigeration equipment must withstand the test with the residue of DIN EN 12735-1 in accordance with paragraph 8.5. Amount of debris on the inner surface of pipes for air conditioning should not exceed 38 mg / m 2.
Both ends of the tubes for air conditioning and refrigeration equipment must be sealed plugs (plugs).
The pipes should be sealed. Control discontinuities produced by the eddy current flaw detector.
_______________
* Requirements for the geometric dimensions of pipes negotiate with the customer when ordering.
Back to section