UFC 3-430-07
24 July 2003
including Change 1, Jan 2004 and Change 2, March 2005
Notes:
1.
Additionally, MUSE boilers and other portable boilers are to be inspected externally and
internally and certified each time they are relocated from one activity to another. MUSE steam coil type
boilers are exempt from annual inspections while in dry or wet lay-up.
2.
All manhole and handhole gaskets must be replaced after application of the strength test
unless they are of the non-compressible steel type.
/2/
3.2
UNFIRED PRESSURE VESSELS. Inspection and test frequencies for
unfired pressure vessels are as shown in Tables 3-2, 3-3, or 3-4, as applicable.
\ Table 3-2 Inspection and Test Frequencies - Unfired Pressure Vessels (UPVs)
Item
Internal Inspection
External Insp. &
Hydrostatic Test
Operational Test
Pressure Vessels
Every 3 years or more
After repair or alteration of
Every 3 years or more
&
frequently as determined
pressure parts. Additional
frequently as determined
Heat Exchangers
by procedures in the
times at the discretion of the
by procedures in the
(15 to 250 psig
NBBI Code for vessels
inspector.
NBBI Code for vessels
MAWP)
subject to corrosion.
subject to corrosion.
After any repair or
After any repair or
alteration of pressure
alteration of pressure
parts.
parts. Inspection must
For LPG see Table 3-3.
include test and
calibration of safety
valves and pressure and
temperature gages.
Pressure Vessels
Every 3 years or more
Every 3 years or more
Every 6 years of service. If
&
frequently as determined
frequently as determined
inspection shows no sign of
Heat Exchangers
by procedures in the
by procedures in the
corrosion, the test may be
(greater than 250
NBBI Code for vessels
NBBI Code for vessels
deferred until the next
psig MAWP)
subject to corrosion.
subject to corrosion.
inspection, but must be tested
After any repair or
After any repair or
at least every 12 years.
alteration of pressure
alteration of pressure
After any repair or alteration
parts.
parts. Inspection must
of pressure parts. Additional
For LPG see Table 3-3.
include test and
times at the discretion of the
calibration of safety
inspector.
valves and pressure and
temperature gages.
Notes:
1.
Test frequencies and inspections may be increased at the discretion of the inspector or owner if
the UPV is subjected, by the nature of its service, to an accumulation of deposits or thermal or
mechanical stresses that could affect the integrity of the vessel.
2.
A hydrostatic pressure test not to exceed 1.5 times the MAWP for BPVC ASME Section VIII
Division 1 vessels and 1.25 times the MAWP for BPVC ASME Section VIII Division 2 vessels may be
substituted for the internal inspection.
3.
If the tube bundle of the heat exchangers is a higher pressure than the shell, both sides of the
heat exchanger must be hydrostatically tested.
4.
Unfired pressure vessels are to be inspected externally and re-certified anytime they are
relocated or moved. It is the activity's responsibility to inform the inspector of the move. For UPVs
designed and built to be portable, reinspections are not required after a move as long as the vessel does
not leave the base. The inspector will indicate the UPV is "portable" on all appropriate reports. Once a
11
Previous Page
