Pressure Vessel Assembly Model FLE Assembly
2-16 750-192
10. Installation of Pressure Vessel to
Base
If the pressure vessel has been built on stands or is
suspended, follow the earlier procedures for
mounting and securing the pressure vessel to the
base.
Figure 2- 29: Leak testing the completed pressure
vessel to the boiler design pressure
WARNING - The assembled Model FLE
pressure vessel is heavy. Until the pressure
vessel is secured to the base, it will be
unstable when standing in an upright position.
Failure to adequately and properly restrain
and/or suspend the drum and tube assembly
prior to securing it to the base may allow the
assembly to fall with the possibility of causing
serious personal injury or death
11. Pressurized Leak Test
After the pressure vessel has been assembled, a
leak test must be performed. The leak test takes as
much time as is needed to check that there are no
leaks. The assembler is responsible for arranging
and preparing for the leak test. An air compressor
capable of pressurizing the flooded pressure vessel
to its design pressure will be required.
If any ferrule-to-drum joint leaks are apparent, the
affected ferrule will need to be driven deeper into
the drum. Relieve the hydraulic pressure, remove
the retainer plate and drive the ferrule deeper into
the drum. Drive the ferrule only far enough to
eliminate leakage.
Table 2- 2: Recommended Pressure for Leak Test
A leak test requires that the following must be
attended to:
• Connection points to the pressure vessel must be
blocked with blind flanges, plugs, or caps
capable of withstanding the required test
pressure.
• A valve capable of withstanding the required test
pressure must be installed in the vent fitting at the
top of the pressure vessel.
• A source of clean water with a minimum
temperature of 70°F must be available to fill the
pressure vessel.
CAUTION - Before resealing the
ferrules, relieve pressure from the vessel.
Once the ferrules are resealed, repeat the
pressurized leak test.
Figure 2-29. With the vessel flooded and
pressurized, check for leaks at all ferrules and
flanges
Boiler Design Recommended
Pressure for Leak Test
15 psi Steam 15 psi
150 psi Steam 150 psi
160 psi Hot Water 160 psi
To Next Page
Loading...
