Page 262 - Water Standards
P. 262
throw shall be no larger than 0 20mm.
3) When the stator is installed, the composite surface of the
stator and foundation base shall be carefully cleaned.
Packing seals shall be installed in strict compliance with
the design requirements. The air gap between the stator
and rotor shall be well adjusted. The difference between
each gap and the average gap shall be no larger than ±8%
of the average gap.
4 2 11 Installation of the pipes and accessories shall meet the fol⁃
lowing requirements:
1 Pipe quality after being bent shall meet the following require⁃
ments:
1) There shall be no flaws such as fissures, delamination and
over burning.
2 ) The difference between the maximum and minimum
external diameters of the pipe should not be larger than
8% of the pipe diameter.
3) The angle of bending shall be in accordance with the
sample plate.
4) The height of corrugated folds inside of the elbow pipe
should not be larger than 3% of the pipe diameter. The
spacing of folds should not be less than 4 times the fold
height.
5) The ring pipe shall be preassembled after bending and the
radius deviation shall be no larger than 2% of the design
value. The pipes shall be on the same surface and the de⁃
viation no larger than 40mm.
2 Vertical deviation of welded three⁃way pipes shall be no
larger than 2% of the height
3 When the pipes are installed, the position of the weld joints
2 5 5