FRIATEC FRIALEN, Fitting Instructions Manual

12

4.8

Pre-heating for reducing the annular gap between coupler and
pipe.

WARNING!
Only use fusion units which have been approved by the manufacturer
with regard to their function for the processing of FRIALEN

®

 Safety

Fittings. See DVS 2207-1.
Use FRIAMAT

®

 fusion units only for FRIALEN

®

 UB d 710!

Preheating barcode (see also instruction leaflet enclosed with the
component part)

The ring gap between the coupler and the pipe can be compensated for
to a certain extent by using a specifically matched preheating barcode
(Figure 9). The maximum bridgeable distance between the coupler and the
pipe may not exceed 3 mm across the entire circumference. For the coupler
mounted and centred at the pipe,
this means: 

Δ

 d 

≤

 6 mm.

For relining slide-over couplers REM
d110/DN100 and d160/DN150, a
maximum gap of 2 mm applies. The
thermal reduction of tensions in the
joining area has also a positive
effect on the fusion result.

Procedure:

1. Preparation of the joining area corresponding to the FRIALEN

®

 installation

instructions for large pipes and pipe network relining.

2. Centre the coupler on the pipe such that the ring gap across the

circumference is as equal as possible. If required, support the coupler.

3. Close the ring gap with adhesive tape to prevent heat losses.
4. Close open pipe ends (chimney effect).
5. Standard processing:

I. Preheating of first coupler side, record yellow barcode with FRIAMAT

®

electrofusion unit and start the process; then

II. preheating of second coupler side, record yellow barcode with

FRIAMAT

®

 electrofusion unit and start the process; then

III. first coupler side: check the ring gap: if it is still too large, the

preheating can be repeated 2 x maximum. If ok: Start 

fusion of first

coupler side

, (white barcode), then

IV. second coupler side: check the ring gap: if it is still too large, the

preheating can be repeated 2 x maximum. If ok: Start 

fusion of

second coupler side

, (white barcode)

Figure 9

FL_2104_8_GB_II_08.p65

25.03.2008, 9:48 Uhr

12