6/
enSTD--Wa 109923707/3110
Piping Systems for Hydraulic, Lubrication and Similar Systems17
After welding:
D Check free passage of the pipe.
D Fill with sulphuric acid (20%) and leave it for 5
hours.
!
CAUTION
Harmful v apours are set free during this process.
Observe the protection regulations of the trade super-
visory board!
D Thereafter, empty the pipes, rinse them well with
water and leave them deposited filled with a soda
solution of 5% (Na
2
CO
3
).
D Thereafter, rinse the pipes again thoroughly with
hot water, dry and preserve them with oil.
D Perform a pressure test applying double operating
pressure.
D After installation and termination of all works, the
entire system is to be rinsed, see SCHOTTEL In-
structions 1100933.
Fastening of conduits
For fastening the conduits it is required to use slightly
dampening or flexibly bedded pipe clamps.
Meticulous installation of the conduits reduces noises
and vibrations and increases the r eliability.
For recommended distance between the pipe clamps
in dependence on the outside pipe diameter, see Fig-
ure 6 and the following table.
Outside pipe diameter
”AD” [mm]
Distance ”L”
[m]
6--12 1.0
12 -- 22 1.2
22 -- 32 1.5
32 -- 38 2.0
38 -- 57 2.7
57 -- 75 3.0
75 -- 90 3.7
90 -- 102 4.0
102 -- 114 4.5
114 -- 168 5.0
Pipe bends are to be supported immediately behind the
bend (Figure 7).
OD
L
Figure 6
Figure 7
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