Commonly found defects are:
- Partially lacking insulation, typically in way of flanges or at
locations where removal of insulation is necessary for maintenance.
- Oil soaked insulation due to damage or the lack of steel sheeting.
The standard of insulation and protection against oil penetration
into the insulation is an area where the general standard has improved
over the years. In earlier days it was not uncommon for flanges to
be left uninsulated and that metal sheeting of the insulation was
incomplete. In cases where incomplete insulation or unsheeted insulation
is found in locations where oil leakages may occur, the owner and
operating personnel should make improvements regardless of the original
standard.