Roxul Industrial Insulation Process - Manual (Page 20)

Planning and pr
epar
ation
1.1 Planning and preparation
protection can only be achieved with a doubleskin
covering. A doubleskin covering is a factory made
cladding that has been welded or soldered to
make it air proof and diffusion-resistant. In
addition special (local) explosion regulations must
be observed.
In explosive areas electrostatically charged
substances like unearthed cladding or non-
conductive plastics must be grounded (earthed).
For further guidance please consult your local
safety guidelines relating to static electricity.
d) Noise protection
The guidelines for noise in the ordinance and
workplace are stated in the local regulations and
standards. Generally, the level of the guideline values
depends on the nature of the activity.
The sound propagation of installation components
can be reduced using insulation systems. The
nature and effect of the sound insulation depend
on the frequency and the sound pressure level.
C. economics
In the industry there are two grades of insulation.
The first grade focuses on reducing heat losses
and the prevention of injuries to people operating
or working nearby the installations. The second
grade of insulation, the so called “economical
insulation thickness” focuses on significant heat
loss reduction and as a result achieving a better
return on investment.
a) Economical insulation thickness
Insulation reduces the heat losses from the
object. The thicker the insulation, the greater
the heat reduction and consequently, the more
energy is saved. However, the investment and
expenditure, e.g. for depreciation, interest rates
and higher maintenance costs also rise if the
insulation thickness is increased. At a certain
insulation thickness, the sum of the two cost flows
reaches a minimum. This value is known as the
economical insulation thickness. A qualitative
curve of a similar costs function is shown below.
The energy costs cannot be based solely on the
current price. Developments over recent years
indicate energy costs will continue to rise.
Costs
Insulation costs
Economical
insulation
thickness
Total costs
Heat loss costs
Insulation thickness
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