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carbon steel tubes marcegaglia
 

REFRIGERATION TUBES
Technical characteristics

The range of steel refrigeration tubes is manufactured according to the specific sector norms and tolerances. The production is thoroughly tested to allow use in applications such as condensers and evaporators for heating and cooling systems and household appliances.

 

Technical characteristics
GRADE EN 10305-3 E160 CR2 S3
SURFACE
APPEARANCE
Non-coated condition is supplied with slight surface oil and protected ends in order to allow the storage of tubes in proper warehouses and for a reasonable period of time

Zinc coating with minimum thickness above 7 µ, equivalent to 50 g/m2, in order to ensure red rust corrosion resistance in salt spray equal to 48 hours, measured according to ISO 9227

INTERNAL CLEANNESS
AND HUMIDITY
Guaranteed according to reference norm limits
DIN 8964
GUARANTEED MECHANICAL CHARACTERISTICS Tensile strenght ≥ 300 MPa
Rm

Yield point ≥ 180 MPa
R0.2

Percentage elongation at break L0=5,65 √S0 ≥ 25%
R0.2

 

Compulsory testing
Quality controls executed on each coil during manufacturing
EXPANDING TEST The test length of tube that is expanded by an internal mandrel over a length of about 10÷12 mm
reaching an increase of the outside diameter up to 20% over the nominal size, must not show any cracking on visual inspection.
BENDING TEST
A test length of tube is wound around a mandrel the diameter of which is six times the tube’s
outside diameter, without developing any crack or leak.
FLATTENING TEST After flattening, the longitudinal section of a test length of non fin-cut tube, measuring
about 50÷60 mm by crushing tubes, must not show any split or crack of the welding area.
The flattening is done by crushing tubes between two parallel surfaces.
AIR-UNDERWATER TEST 100% tested
  Carbon steel tubes - tubi in acciaio al carbonio, headquarter Marcegaglia

MARCEGAGLIA tube division
via Bresciani, 16
46040 Gazoldo Ippoliti, Mantova - Italy
phone +39 . 0376 685 297
fax +39 . 0376 685 600
tubi@marcegaglia.com

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