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5.1.1 Measuring of fusion zone of
the pipes (and the lateral
outlet spigot), marking and
removing oxide layer
The fusion zone: is the area of pipe
covered by the saddle; for a side outlet
it is the insertion depth on the smooth
pipe spigot. The oxide layer in the
area of the fusion zone, which has
formed on the surface of the HDPE
pipes during storage, must be
totally
removed with a hand scraper or a
scraper tool (e.g. FWSG SE) imme-
diately
before
assembly (See Figure
14).
A processing allowance of several
millimetres in addition to the covered
area provides proof after fusion that
the oxide layer has been properly
removed from the pipe.
WARNING!
If the oxide layer is not removed
completely, leaking fusion joints
may result.
Worn blades of the scraper tool and manual scraper must be replaced.
A one-time, complete removal is sufficient (min. 0.15 mm). A uniform surface
without flattening and material grates at the pipe diameter should be the
result.
WARNING!
Filing or sanding of the pipe is not permitted because contaminations
are introduced.
Figure 14
Figure 14 a
FL_2104_8_GB_II_08.p65
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Summary of Contents for FRIALEN
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