CHAPTER 5 ERECTION INSTRUCTIONS FOR THE 500-BARREL CAPACITY TANK

TM 5-5430-209-12

CHAPTER 5

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

paragraph 3-4.

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

interchangeable.

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.

Refer to

storage tank erection outfit.

NOTE

paragraph 4-2 and assemble the first bottom plate.

c. Assembling

Intermediate

Bottom

Plates.

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

WARNING

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

seams.

separated from all other plates until it is installed in the

b. With tank bottom dry, apply sealing compound

tank bottom.

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

5-1