COPPER TUBES FOR REFRIGERATION AND AIR CONDITIONING SYSTEMS

Standart documents:
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.

Brand: Cu-DHP with the chemical. composition of DIN EN 12735-1:2001, DIN EN 12735-2:2001

Purpose: The pipes are used for installation of piping systems refrigeration and air conditioning systems, as well as internal connecting tubes.

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 MPa at least	Relative Elongation A% at least
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 MPa	Strength at tension R m, MPa, no less	Strength at tension R m, MPa, no less	Grain size μm
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.

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* Requirements for the geometric dimensions of pipes negotiate with the customer when ordering.

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