4 - Covering >> Using Arma-Chek D Covering
APPLICATION MANUAL
D
© ARMACELL UK LTD.
Covering Of Insulated Objects >> Using Arma-Chek D Covering
d. Allow 36 hours curing time before turning on the
equipment.
CIRCULAR DUCTWORK
Apply the Arma-Chek D or Arma-Chek R covering as
you would for large bore pipework installations. (Refer
to the section on large bore pipework installations on
page 15.)
FITTINGS MADE OF COVERING MATERIAL
The following fi ttings can be fabricated using traditional
sheet metal cladding working practices (leaf/segmenta-
tion) techniques. As an alternative to these time con-
suming methods below are easy step-by step details
for fabricating fi tting templates. The examples below
with the use of the Armafl ex Installation Manual and the
Armafl ex cutting templates that are located on all our
Armafl ex tube cartons should help you on the way.
SEGMENTED BENDS
When using Armafl ex tube on bend fi ttings the following
fabrication technique could be used:
1. Measure the width of the throat and back of a seg-
ment of the assembled segment bend and determine
the circumference.
2. Transfer the circumference measurement (U) to the
Arma-Chek Dcovering material and draw in a line
dividing it in half. Now add a 50 mm wide overlap on
one side.
3. Draw in the segment width for the throat seam at
each end of the circumference, and the segment
width for the back of the bend at the halving of the cir-
cumference. Add an allowance of 5 – 10 mm (de-
pending on the outer diameter of the insulated pipe)
to each side for the butt overlap.
4. Connect the throat and back width measurements (to
which the allowances have been added). Cut out the
segment shape.
5. Optimize the shape of the curve at the widest point of
the cut-out segments by rounding slightly with a pair
of scissors or craft knife.
Remark:
In order to cut out the same segment shape
several times we recommend making a cardboard/
metal template so that the shape can be transferred
to the covering material optimally. The template can
be halved lengthways to make the pieces for the be-
ginning of the bend.
6. Install the segments, beginning with the appropriate
Armafl ex adhesive.
Note: To ensure that the overlap sits tidily, the mate-
rial can be feathered.
D (17)
