REFRIGERATION TUBES
Marcegaglia do Brasil range of electro-welded steel tubes, unplated or zinc dedicated to the refrigeration industry 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. Versatility, economy and high corrosion resistance complete the features of Marcegaglia refrigeration tubes.
| outside diameter mm |
tolerance mm |
wall thickness mm |
tolerance mm |
| 4,00 | ± 0,08 | 0,64 | ± 0,13 |
| 4,76 | ± 0,08 | 0,71 | ± 0,13 |
| 6,00 | ± 0,08 | 0,71 | ± 0,08 |
| 6,35 | ± 0,08 | 0,71 | ± 0,08 |
| 7,94 | ± 0,08 | 0,71 | ± 0,08 |
| 9,52 | ± 0,08 | 0,71 | ± 0,08 |
Grade
Welded low carbon steel tube 1006/1010 (SAE J526)
Surface appearance
Resistance in salt spray:
according to ASTM B117 (zinc coated tube) ≥ 48 hours
The unplated tube is supplied with oiled outer surface
Hot dip galvanized
Physical-chemical properties
ASTM A254 e NBR 14666
Insoluble internal residue max 12 mg/sqm
Soluble internal residue max 28 mg/sqm
Total internal residue max 40 mg/sqm
NBR 14667
Internal moisture max 50 mg/l
NBR 14668
Chemical reactivity
NBR 14669
Compatibility with R134a gas max -36 °C
Mechanical characteristics
Tensile strength ≥ 290 MPa
Yield strength ≥ 170 MPa
Elongation ≥ 14%
Hardness max 80 HR 15 T
Hydrostatic resistence ≥ 725 psi
Expansion max25%
|
