ERECTION INSTRUCTIONS FOR
THE 500-BARREL CAPACITY TANK
Section I. ASSEMBLY AND INSTALLATION OF TANK BOTTOM
5-3. Installation of Bottom Plates
5-1. Center Bottom Plate
a. General. The center bottom plate (1, fig. 4-1) is
Refer to paragraph 4-3 and install the bottom plates.
5-4. Tightening Tank Bottom
a circular, flat, steel, plate. The tank bottom plates are
attached to the outer circumference bolting circle.
Refer to paragraph 4-4 and tighten the tank bottom.
b. Installation. Refer to paragraph 4-1 and install
5-5. Bolt Replacement Plug
the center bottom plate.
If threads are stripped on one or more bolts in tank
5-2. Assembly of Bottom Plates
bottom during tightening process, drive out the bolt and
a. The tank bottom consists of 14 tapered, flat,
replace it with a replacement plug as instructed in
steel plates. Thirteen plates (6, fig. 4-1) are plain, and
5-6. Testing Seams for Leakage
one plate (7) is special.
Thirteen plates are
When the bottom is completely
Refer to paragraph 3-5 and test tank bottom for leaks
installed, the plate pattern resembles a wheel.
utilizing the vacuum seam tester furnished with the
b. Assembling First Bottom Plate.
storage tank erection outfit.
paragraph 4-2 and assemble the first bottom plate.
Do not move from a tested area until all
Fourteen intermediate plates, including an outlet plate
leaks have been corrected.
5-7. Sealing Seams
(7, fig. 4-1), are assembled with channels and strip
gaskets. Except that the channels are placed under the
If tank is to be used for water
right lap seams, follow the assembly procedure outlined
in paragraph 4-2 c. The outlet plate has, in addition, a
storage, do not apply sealing
blind flange set assembled on it. The above procedures
compound to tank bottom.
do not apply to the last bottom plate, since no further
a. Sweep tank bottom clean after testing the
assemblies are made on it. Keep the last bottom plate
separated from all other plates until it is installed in the
b. With tank bottom dry, apply sealing compound
to all bottom seams (fig. 3-16).
d. Assembling Outlet Plate. Refer to paragraph 4-
2 and assemble the outlet plate.
Section II. ASSEMBLY AND INSTALLATION OF SIDE STAVES
5-8. Assembly of Side Staves
bottom edges of staves are called chimes; side edges
a. General. The 500-barrel capacity tank is a
are called vertical seams. The staves have a single row
of boltholes in each seam.
single ring tank.
Place all center support ladder
b. Layout of Staves. Five special and nine plain
components and manhole dome on the bottom prior to
staves make up the ring. Refer to figure 5-1 and lay out
installation of the last stave. This is to avoid having to
the staves around the tank bottom.
lift them over the top of the assembled staves. Top and