TANK REPAIR AND CALIBRATION
Section I. NORMAL PROCEDURES
(3) If leak cannot be corrected by tightening the
bolts; refer to Chapter 9, disassemble and re-erect the
Most leaks in bolted steel tanks occur at bolted
tank using the appropriate re-erection kit.
connections in the bottom plates and in an area of the
b. Leaks caused by Small Arms Fire. Holes in the
side staves within two feet of the bottom. These leaks
tank inflicted by small arms fire can be patched by using
are usually caused by erosion of the foundation material
bolt replacement plugs. Refer to paragraph 3-4 for
which no longer provides the required support for the
installation of bolt replacement plugs.
bottom and side stave plates. Weeping of several tank
joints is not uncommon. A wetted area is formed and
10-3. Burned-Out Tanks
the tank is discolored. However, fuel never reaches the
ground due to evaporation.
Components of tanks which have burned out are usually
10-2. Repair of Leaking Tanks
unfit for salvage because of buckled plates. Any tank
a. Leaks at Bolted Connections.
which has burned out must be completely dismantled
because fire and heat destroy the gasket material.
(1) Locate point(s) of leakage.
Disassemble and re-erect the tank using new gaskets,
(2) If possible, apply additional torque to existing
nuts and bolts as instructed in Chapter 9. Use new
bolts in area of the leak. Tighten bolts just enough to
metal plates if old ones cannot be readily repaired.
stop the leak.
Section II. ALTERNATE METHOD OF BOTTOM REPAIR FPR 3000-AND 10,000-BARREL CAPACITY TANKS.
circulation of air through the tank. Check for trapped
airborne lead vapors.
This section contains an alternate method for tank
c. Clean the tank as instructed in TM 10-1109.
bottom repair on 3000- and 10,000-barrel capacity
d. Perform any work required to raise the heights
tanks. Use of this alternate method, which employs a
of the cleanout cover, water drawoff valve, and pipe
concrete cap over the original bottom, is limited to tanks
connections to compensate for increased height of tank
used to store petroleum products.
bottoms after installation of concrete cap.
Utilization of this technique completely
a. Surface Preparation. The tank bottom, center
eliminates the capability of the tank to be
support base, and side staves, to a height of 24 inches,
totally disassembled and reerected
should be prepared as follows:
it is used only when
(1) Clean the surface to be prepared by dry
permitted by the tactical situation.
abrasive blast cleaning in accordance with Steel
Structures Painting Council Specification SSPC-SP5-63,
a. Completely drain contents of tank.
(1) Use extreme caution in opening and venting
(2) Seal the prepared surface with an epoxy
the tank so as not to create a spark which might ignite
coating per MIL-L-2638C (tanks used in U.S. Army) or
explosive vapors. Do not smoke or light inflammables
MIL-C-4556D (tanks used by U.S. Air Force).
near the tank.
b. Installation of Concrete Cap.
(2) Open pressure vacuum valve and emergency
(1) Refer to table 10-1 for material required to
vent in the tank.
install the concrete cap.
b. Remove cleanout cover and allow tank to vent
until all fumes and vapors have dissipated.
windsails directed into the cleanout opening to aid in