4/
enSTD--Wa 109923707/3110
Piping Systems for Hydraulic, Lubrication and Similar Systems17
Cutting pipes to length
After bending the pipes are cut rectangular to length
(Fig.2,max.1/2_ deviation of angle).
This is facilitated by a sawing--off device.
!
ATTENTION
Pay attention again that the tail end of the pipe remains
with sufficient length ( = 2x h)!
For cutting the pipes do not use pipe cutters, otherwise
the pipe wall is cut biased and with it a strong gener-
ation of burrs.
Figure 2
After sawing the pipes off, deburr the tail ends (Figure
3), about 0.2 mm x 45_ at the inner and outer edge, and
are rinsed w ith degreaser.
If possible, mount completed pipes immediately; in
case the pipes (short time) have to be stored it is re-
quired to close both tail ends with plastic caps (do not
use cleaning wool or other fuzzy material).
0.2x45_
0.2x45_
Figure 3
Hot bending of pipes
Prior to bending it is required to fill the pipes with steel
balls with a diameter of approx. 2 mm, then closing both
tail ends. Heat the bending point of the pipe up to ap-
prox. 850 °C (dark red); higher temperatures bear the
risk of the filling material getting stuck to the pipe.
Empty the pipe after bending and leave it deposited for
about 5 hours filled with sulphuric acid of 20%, for this
it is required to observe the protection regulations of the
trade supervisory board given that harmful vapours are
set free.
Thereafter, empty the pipes, rinse them well with water
and leave them deposited filled with a soda solution of
5% (Na
2
CO
3
).
Thereafter, rinse them again thoroughly with hot water,
dry and preserve them with oil.
In case of intermediate s torage close both tail ends of
the pipes.
After installation the entire system is to be rinsed, see
SCHOTTEL Instructions 1100933.
To Next Page
Loading...
