Buderus Manual on Trenchless Installation of Ductile Cast ... - Duktus

Fig. 2.21
Left lock
Catch
Right lock
High-pressure lock
With nominal sizes from DN 00 to
DN 1000, the planar locking segments
are inserted in the axial direction through
the twin openings in the end-face of the
socket and are then moved to be evenly
spaced around the circumference. To
simplify the locking process, the openings
are preferably positioned to be at the
crown of the pipe (Fig. 2.23). Once all the
locking segments have been inserted in
the gap in the socket, they are shifted as
a whole around the circumference sufficiently
far for none of the humps to be visible
through the openings in the socket.
The segments are fixed by a clamping strap
and locked by gently pulling the pipe out of
the joint until the welding bead comes to
rest against the segments. An extra-strong
metal clamping strap has proved useful
in directional drilling projects involving a
number of changes of direction (Fig. 2.2 )
A detailed description of how the various
components are dealt with and used
can be found in the operating instructions
(section 11).
Making the BLS ® joint
Fig. 2.22
Fig. 2.23
Fig 2.24
2