FREQUENCY OF INSPECTION AND TESTS
The following chart lists different types of equipment and the frequency of boiler testing requirements.
For frequency and testing requirements concerning unfired pressure vessels, refer to NAVFAC MO-324.
Table 12-1(B).Boiler Inspection and Test Frequencies
1. Additionally, MUSE boilers and other portable boilers must be inspected externally and internally
and certified each time they are moved from one place to another. A MUSE steam coil type of boiler
is exempt from annual inspections while in dry or wet lay-up.
2. All manhole and handhole gaskets must be replaced after a strength test unless they are made of
PREPARING FOR INSPECTION
WATERSIDE INSPECTION OF BOILER
The activity that operates and maintains
Regular waterside inspection of boiler tubes
pressure vessels provides all of the material and
provides the information required to determine the
labor required to prepare the vessels for inspection.
effectiveness of water treatment, maintenance
You need to help the inspector during inspection.
procedures, diagnoses of boiler operating troubles,
An inspection on pressure vessels located on a
and in general an overall condition of the boiler.
naval base in a foreign country must comply with
Tube failures generally occur in the outer half
NAVFAC MO-324, lnspection and Certification
of the tube nest from external corrosion just above
of Boilers and Unfired Pressure Vessels.
the water drum. When such failures have
occurred, either in operation or under