© ARMACELL UK LTD.
D
APPLICATION MANUAL
4 - Covering >> Using Arma-Chek D Covering
Covering Of Insulated Objects >> Using Arma-Chek D Covering
ELBOWS
1. Measure the maximum and minimum length of the
elbow segment (a) and determine the circumfer-
ence.
2. Follow the same procedure as described in points 2
- 6 ”segmented bends“. (Point 2: instead of the seg-
ment width for the throat seam measure/draw in the
minimum elbow segment length. Instead of the seg-
ment width for the back of bend measure/draw in the
maximum elbow segment length (b)).
Note:
Draw in these lengths on one side only!! Add
allowance of 5 – 10 mm for the butt overlap to one
side only.)
a
b
TWO PIECE BENDS
(fabricated from Armafl ex sheet material)
1. Measure the length of the inner (throat) seam of
the bend and determine the number of segments.
The number of segments should be chosen to achieve
an exact fi t on the outer side (back) of the bend (re-
commendation: minimum segment width in the throat
area > 20 mm.)
2. Determine the circumference of the insulated pipe
and transfer this to the covering material. Halve the
circumference.
3. Transfer segment width for the throat seam to each
end of the circumference drawn, and the segment
width for the back of the bend to the halved circum-
ference.
4. Connect the determined segment widths to each
other - taking into account the additional allowance
of an overlap of 5 to 10 mm at each end.
5. Extend the circumference on one side by the overlap
measurement of 50 mm.
6. Cut out the fi nished segment which can be used to
fabricate further segments.
7. Fabricate initial pieces for the beginning of the bend
with a half segment and possibly the additional allow-
ance of an appropriate bend extension.
8. Assemble the segments fi rst taking one of the initial
pieces.
Note:
All overlap areas require all-over coverage with
the appropriate Armafl ex adhesive. On large bore
“pulled bend” pipework (hydraulically bent pipes) use
what is known as the ”wrap-around technique“ as a sim-
pler alternative to the procedure described here. Note:
Always allow for 50% overlap when using the “wrap-
around technique”.
For this technique it is possible to use the Arma-Chek D
covering bandage or self adhesive tape material (avail-
able on rolls).
(18) D
