Specifications

84 Preservation Specifications
Note:
If the laminated aluminum foil is replaced or repaired following damage, the calculation for the desiccant
required (DU) must be carried out again as follows (example) (→ Page 83).
Calculation example for desiccant units
Determination of DU for the seaworthy transport of an engine to Singapore:
• Laminated aluminum foil surface 10 m²
• Packing material: 3 kg
• Packing for climatic zone C:
17 DU/m² laminated aluminum foil x 10 m²
=
170
+
20 DU/kg
x3kg
=
60
Total 230 DU
Result: Sufficient protection of the engine requires 230 desiccant units (DU).
Humidity Indicator
Humidity indic
ators can be inserted into the foil envelope to show the saturation level of the desiccant. The
indicators signalize by changing color that the specified level of relative humidity has been exceeded. An increase
in relative hu
midity e.g. due to leaks or damage, presents a risk of corrosion for the engine.
A viewing window with a humidity indicator is screwed into the laminated aluminum foil at a point
as far away as possible from the desiccant. It is thus possible to check the relative humidity
inside the foil envelope and / or to verify any changes.
The humidity must be checked regularly every 3 to 4 months.
30
Colored pink:
Relative humidity above
30%.
40
Colored pink:
Relative humidity above
40%
50
Colored pink:
Relative humidity above
50%
Relative humidity above 30%
Reduce time between checks, i.e. check every 4 weeks.
Relative humidity above 40%
The desiccant must be replaced (→ Page 91); evenly distribute the new desiccant primarily in the upper
section of the packaging. Required units of desiccant for special packaging (→ Page 83).
Relative humidity above 50%
Check condition of packed engine, represerve engine, (→ Page 80)and (→ Page 81) and repack engine (→ Page 85).
Note:
The humidity indicator regenerates itself; replacement is not necessary.
Order numbers for p acking materials
Details required when ordering from MTU:
A001061/33E 08-01 ©MTU
TIM ID: 0000010139 – 006