MIL-HDBK-1004/10

= %&&

%&&&&&&&&&

x 3.1416 x 28 x

A

2

14 + 28

B

A

= 3,894 ft

B

(4)

Therefore:

A

= 1,759 ft

T

A

= 1,935 ft

C

A

= 3,894 ft

B

(5)

Total = 7,588 ft (wetted area of tank bowl).

b)

Area of riser pipe:

= 2Br

h

A

R

R

R

where

r

= 2.5 feet (radius of riser)

R

h

= 115 feet (height of riser)

R

A

= 2 x 3.1416 x 2.5 feet x 115 feet

R

A

= 1,806 ft

R

c)

Maximum design current for tank:

I

= 2.0 mA/ft x 7,588 ft

T

I

= 15,176 mA or 15.2 A

T

d)

Maximum design current for riser:

I

=

Rx 1,806 ft

2.0 mA/ft

I

=

R 3.6 A

3,612 mA or

e)

Minimum weight of tank anode material:

W

= YSI/E

where

W

= weight of anode material

Y

=

design life

S

=

anode deterioration rate

I

=

maximum design current

E

=

anode efficiency

158

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