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Sleeve and insert work 5CSL0-06B
2. Guideline for each installation process
2.1 Sleeve and insert work
2.1.1 Positioning of the pipe holes
1. The through holes for the drain piping should be positioned
such that pipes have a downward gradient (the
gradient must be at least 1/100.The thickness of the insulating
materials must also be taken into consideration.)
2. The diameter of the through holes for the refrigerant piping
should include an allowance for the thickness of the
heat insulation materials.
3. Attention should be paid to the construction of the beam
themselves since there are sometimes parts of the beam
which cannot be used to accommodate through holes.
2.1.2 Selection of sleeve
1. Sleeve work should be performed to make a space for
passing pipe and wire through the wall or ground under
construction.
For example if gas pipe and liquid pipe is 12.7mm , 6.35mm
the sleeve diameter is minimum 79.05mm .
Gas pipe diameter 12.7mm
Liquid pipe diameter 6.35mm
Insulation thickness(gas pipe) 10mm x 2
Insulation thickness(liquid pipe) 10mm x 2
20mm surplus 20mm
Total sleeve diameter 79.05mm
* Assumption : Gas pipe insulation thickness and liquid pipe
insulation thickness is 10mm and 10mm respectively
2.1.3 Sleeve type
NOTE
Pipe
Sleeve
Insulation
Sleeve type should be considered as per local regulation &
laws.
NOTE
CAUTION
1. In high voltage generation places, water-proof flexible
conduit should be used. (in substation room, in elevator
room)
2. Conduit should be chosen in accordance with electrical
installation regulation.
Cable conduit should be considered under the local regulation
& laws.
2.1.4 Insert work and support work
An insert is a metal tool which is inserted into a floor or
beam before the concrete is set such that fittings such as
duct , pipes or suspension bolts for hanging units can be fitted
into the place later. The positioning of the inserts must
be decided early.
1. Insert work
Example : Through holes in a reinforced concrete beam
Molding box
290 Guideline for each installation process
Embedding
depth h
Polyblock
Nail securing
molding box
Suspension bolt