vacuum valve (2, fig. 4-8) must be installed directly
If tank is used for water storage, omit
across from first plate with the valve: Refer to paragraph
the emergency vent valve (2, fig. 3-24).
3-16 d and install the first deck plate.
e. Installing Second Deck Plate. Refer to
Install manhole cover (1) with blind
flange set after installing manhole air
paragraph 3-16e and install the second deck plate.
f. Installing Intermediate Deck Plate. There are
twelve intermediate plates. The special plates
(1) Install 30-bolthole gasket on top flange of dome
remaining are installed to suit field conditions. Refer to
(3, fig. 4-10).
paragraphs 3-16d and e and raise and install these
(2) Insert 1/2 -by 1-inch bolts through the flange and
g. Installing Last Deck Plate. Refer to paragraph 4-
gasket, in that order. Gasket will hold bolts in place.
(3) Install 30-bolthole manhole cover (1, fig. 3-24)
17g and install the last deck plate.
h. Installing Manhole Cover.
over the bolts. Install a steel washer and nut on all
bolts. Make sure rounded head of nut is against the
washer. Tighten the bolts.
Section V. ASSEMBLY AND INSTALLATION OF TANK ACCESSORIES
5-18. Emergency Vent
a. General. Refer to paragraph 3-17 for a general
at opening in cover. Insert 1/2-by 1 /2-inch bolts through
the 2-bolt hole channels. Work through the 10-inch hole
description of the vent.
and insert bolts through cover and gasket.
(6) Install 10-inch blind hatch flange over the
(1) Place manhole cover gasket over bolt holes
at opening in cover (1, fig. 3-24). Insert 1/2-by 1/2-inch
(7) Install nuts on the bolts and tighten.
bolts through 2-bolt hole channels. Work through the
5-20. Access Ladder
10-inch hole, and insert bolts through cover and gasket.
a. General. Refer to paragraph 3-19 for a general
(2) Install the vent (2) over the bolts.
description of the access ladder.
(3) Install nuts on bolts and tighten the bolts.
b. Assembly. Refer to paragraph 3-19 and
5-19. Manhole Air Intake
a. General. Refer to paragraph 3-18 for a general
assemble the ladder.
c. Installation. Refer to paragraph 3-19 and install
description of the intake.
5-21. Water Drawoff Valve
(1) Wrap insect screen around outside of the
a. General. Refer to paragraph 3-21 for a general
inside screen ring. Join ends of the screen with copper
description of the water drawoff valve.
(2) Install an outside screen ring at top and
bottom of insect screen to hold it in place. Make sure
(1) Flanged elbow. Refer to paragraph 3-21 and
the screen is not knocked out of position. Tighten the
install the flanged elbow.
(2) Drawoff valve. Refer to paragraph 3-21 and
(3) Install screen ring on top flange of the dome
install the drawoff valve.
5-22. Tank Outlet (4-, 6-, and 8-inches)
(3, fig. 4-10).
a. General. Refer to paragraph 3-22 for a general
(4) Insert flange bolts through cover (1, fig. 3-
24), dust restrictor, pipe sleeve spacers, and top flange
description of the outlet.
b. Installation. Refer to paragraph 3-22 and install
of dome (3, fig. 4-10), in that order. Install nuts on the
bolts and tighten.
the 4-, 6-, and 8-inch elbows and adapters.
(5) Place manhole cover gasket over bolt holes
Section VI. TANK TESTING AND FINAL ASSEMBLY
description of the cleanout cover.
b. Installation. Installation procedures are similar to
Tank interior must be cleaned, inspected, and tested for
those for the 100-barrel capacity tank. Refer to
leakage prior to installation of the cleanout cover. After
paragraphs 3-25 and 3-27 and install the cleanout cover.
installation of cover, the tank site must be cleaned.
5-27. Cleaning Tank Site
5-24. Tank Cleaning and Inspection
The tank erection crew is responsible for initial policing
Refer to paragraph 3-24 and clean and inspect the tank.
5-25. Water Test
of the tank site. Cleaning procedures are described in
Refer to paragraph 3-26 and water test the tank.
5-26. Cleanout Cover
a. General. Refer to paragraph 3-27 for a general