1 The following is an example of a general purpose
sample point connection flange which should be sited, as convenient,
on the exhaust duct of each engine for which it may be required to
demonstrate compliance by means of the direct measurement and monitoring
method.
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Description
|
Dimension
|
| Outer diameter
|
160 mm
|
| Inner diameter
|
35 mm
|
| Flange thickness
|
9 mm
|
| Bolt circle diameter 1
|
130 mm
|
| Bolt circle diameter 2
|
65 mm
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| Flange slots
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4 holes, each 12 mm diameter,
equidistantly placed on each of the above bolt circle diameters. Holes on
the two bolt circle diameters to be aligned on same radii. Flange to be
slotted, 12 mm wide, between inner and outer bolt circle diameter
holes.
|
| Bolts and nuts
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4 sets, diameter and length as
required
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| Flange
should be of steel and be finished with a flat face.
|
2 The flange should be fitted to a stub pipe of
suitable gauge material aligned with the exhaust duct diameter. The
stub pipe should be no longer than necessary to project beyond the
exhaust duct cladding, sufficient to enable access to the far side
of the flange. The stub pipe should be insulated. The stub pipe should
terminate at an accessible position free from nearby obstructions
which would interfere with the location or mounting of a sample probe
and associated fittings.
3 When not in use, the stub pipe should be closed
with a steel blank flange and a gasket of suitable heat resisting
material. The sampling flange, and closing blank flange, when not
in use, should be covered with a readily removable and suitable heat
resistant material which protects against accidental contact.