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Carbon steel tubes/Refrigeration tubes

REFRIGERATION TUBES

Marcegaglia dedicated range of carbon steel tubes for the refrigeration industry is carried out within the manufacturing units of Forlì in Italy and, abroad, in Kluczbork, (Marcegaglia Poland) and Garuva (Marcegaglia do Brasil) plants. Versatility, economy and high corrosion resistance are the main features of Marcegaglia steel refrigeration tubes.

PRODUCT RANGE
diameter mm nominal weight g/m
4,75 70
5 74
6 91
6,35 98
8 126
9,50 152

Wall thickness 0,70 mm

SUPPLY CONDITIONS
  • Outside diameter tolerance: nominal ±0,1 mm
  • Wall thickness tolerance +0,05 mm / -0,10 mm
TECHNICAL CHARACTERISTICS
GRADE EN 10305-3 E160 CR2 S3
ASPECT SURFACE 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 timeZinc 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
STANDARD PACKAGING

Examples of standard packaging for all Marcegaglia product range of refrigeration carbon steel tubes. Any specific requests will be dealt accordingly to customer’s needs. Each pallet and each coil is marked with an identification tag allowing the complete traceability of the product.

DOMESTIC MARKET Coils are supplied on wooden pallets (expendable) or on galvanised steel pallets (to be returned). They are laid with wraps parallel to the pallet surface, compactly wound.
Wraps are clamped and secured by suitable straps in three or four points. The maximum weight for each pallet is about 2500 kg.
Cold-rolled strip coils are protected with anti-oxidation oil.
FOR EXPORT
Cold-rolled strip compactly wound coils with anti-oxidation oil are supplied in V.C.I. bag. Coils are laid with wraps parallel to the pallets surface, compactly wound.
Wraps are clamped by suitable straps in three points.
  • All pallets are protected from dust with cardboard packaging
  • Non-standard packaging is developed according to customer request

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