Assembly Of The Clamp - TESTO 6448 Instruction Manual

5 Initial operation
On-site preparations
The installation point must be freely accessible and there must be
enough space to work around the pipes.
A stable stepladder is required for all assembly work carried out up
to 3.5 metres off the floor (height of the pipe). A working platform
must be provided for work at greater heights. If the measuring point
cannot be accessed by a platform, then scaffolding or other equip-
ment must be used to provide a safe working platform.
Any cladding or insulation covering the pipes must be removed
around the measuring point (clearance of at least 0.6 metres). Any
grinding work required in the event of corroded pipes must be car-
ried out carefully so that the surface curvature is not destroyed.
5.1.2.

Assembly of the clamp

Assembly recommendations
• Compare the pipe diameters and check the correct size of the
clamp.
• Eliminate all traces of dirt, rust and grease from the assembly
point of the clamp so that the surface is smooth and clean. The
seals and slide plate should be wetted to achieve better adhe-
sion. Seals, nuts and bolts must not be greased!
• Before assembly, mark the position of the clamp to ensure a
correct fit.
• During assembly, ensure that the seals and holder lips remain
clean and that no foreign bodies are found between the seal
and pipe.
• The correct tools (long wrench and/or torque wrench) make as-
sembly easier.
• The bolt threads must not be contaminated.
• If a torque wrench is not used, then the nuts must not be tight-
ened excessively. Always pay attention to the shape of the
Delrin® washer.
• Always carry out a pressure test before closing the clamp. In
the event of leaks, adjust the torque and check again after 20
minutes.
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