1 Scope
This Part of EN 12666 specifies the requirements for pipes, fittings and the system of polyethylene (PE)
piping systems intended to be used for
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— non-pressure underground drainage and sewerage outside the building structure (application area code "U"), and
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— non-pressure underground drainage and sewerage for both buried in the ground within
the building structure (application area code "D") and outside the building structure.
This is reflected in the marking of products by "U" and "UD".
It also specifies the test parameters for the test methods referred to in this European
Standard.
This European Standard covers a range of nominal sizes, a range of pipe series/stiffness
classes and gives recommendations concerning colours.
NOTE 1 It is the responsibility of the purchaser or specifier to make the appropriate selection
from these aspects, taking into account their particular requirements and any relevant
national regulations and installation practices or codes.
In conjunction with CEN/TS 12666-2 [1] it is applicable to PE pipes and fittings, their joints and to joints with components
of other plastics and non-plastics materials intended to be used for buried piping
systems for non-pressure drainage and sewerage.
This European Standard is applicable to PE pipes with or without an integral socket.
The fittings can be manufactured by injection-moulding or be fabricated from pipes
and/or mouldings.
This European Standard is applicable to PE pipes and fittings for the following types
of joints:
NOTE 2 Requirements and limiting values for application area code "D" are given in Tables 3, 6 and Table 12.
NOTE 3 Pipes, fittings and other components conforming to any of the plastics product standards
listed in the bibliography may be used with pipes and fittings conforming to this
European Standard, provided they conform to the requirements for joint dimensions
given in Clause 6 and to the requirements of Table 8 and Table 12.