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Figure 26: Fitting a flanged probe to process pipework
Once the spectrometer is aligned with the port, fit appropriate bolts as specified in the relevant
standard, and tighten in stages in the order shown below.
Figure 27: Front view of lap-joint flange, hub and bolt holes. Tighten bolts in steps in order 1-2-3-4 to
ensure even compression of the gasket
Ensure that the bolts are sufficiently tight to prevent a leak from your pipework.
5.3.3. Maintenance
Keit recommends regular inspection of the integrity of the welds on the front and rear in line
with local safety procedures.
Inspection of the sealing weld will require removal of the flange and spectrometer from the
pressure vessel and can be completed as part of regular inspection/maintenance of the
spectrometer and pipework.
Do not use impact (e.g. a hammer) to separate components if the gasket becomes stuck to
the flange and hub.
The lap-joint flange may be manufactured from Hastelloy or stainless steel. Care should be
exercised to ensure that it is not corroded by aggressive chemicals during maintenance or
installation.
