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DATA SPECIFICATION TANK

I. Title: Elevated Water TankII. Specification: Tank Capacity = 15000gal

Rate of Water Flow in pipe = 350gpmIII.Design Sheet:ITEM

NUMBERSPECIFICATION:

15000gal;450gpm

SYMBOL CALCULATEDVAUES

ITEM #1 Conversion ofvolume to feet ofwater

V 2000

ITEM #2 Calculation ofweight of water

W 124800lbs.

ITEM #3 Assumed height ofthe tank for betterlongitudinalpressure

H 15ft.

ITEM #4 Calculation of radiusof water tanks

r 6.514ft.

ITEM #5 Diameter of the tank D 13.028ftITEM #6 Shape and figure of

the water tank (cylindrical

shape)ITEM #7 Mass of water in the

tankM 3875.776slug

ITEM #8 Cross-sectional areaof the tank at thebottom

Ab A=20.464

ITEM #9 Gauge pressure ofthe tank

Pg 6098.414lb/ft^2

ITEM #10 Longitudinal-stressof the cylinder tank

Sl 24393.659lb/ft^2

ITEM #11 Absolute pressure inwater tank

Pab 8215.214lb

ITEM #12 Minimum thicknessof wall of the tank

t 1.097

ITEM #13 For minimummaterial needed indesign

D=H for min.material

MATERIALITEM #14 Tank Structure


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STEELA Sheet TYPE ASTMA570B Plate TYPE ASTMA36C Rolled structure

shape

TYPE ASTMA36

ITEM #15 Tank DesignStandard

ITEM #16 Design LoadA Specific Gravity S.G. 1B Shape Factor sf 0.6C Allowable Soil 10000psf D Roof snow load 0E Sealants IBC/AWWA

ITEM #17 Sealants

ITEM #18 Supportpedestal/columnA Support column Type ACI 371R-98B Concrete

B.1 Compressivestrength

a Concretesupportstructure

4000psi

b Foundations 3500psiB.2 Air Trainment Type Per ACI 316

B.3 Curing Type ASTM C309,ACI308

B.4 Formwork Type ACI 347 RB.5 Concrete finish Type ACI 371R-98

ITEM #19 HydrostaticITEM #20 Perspective

Data specification tank

1.) Rate of water flow in pipe: 350GPM

2.) Tank capacity: 15,000gal

3.) Approximate height from ground to elevated tank:

40ft


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4.) Length of discharge line including valves and

fittings: 300ft

5.) Approximate distance of fresh water supply from

pump: 25ft

Calculation of Water Tank

ITEM # 1: CONVERTION OF VOLUME TO FEET OF WATER:

FORMULA:CUBIC FEET OF WATER = GALLONS OF WATER / 7.5CUBIC FEET OF WATER = 15 000 / 7.5 = 2000 CUBIC FEETCUBIC FEET OF WATER = 2 000 ft

ITEM # 2: CALCULATION OF WEIGHT OF WATER:

FORMULA:WEIGHT OF WATER IN POUNDS = CUBIC FEET OF WATER x

62.4W = V x 62.4W = 2000 x 62.4W = 124 800 lbs.

ITEM # 3: ASSUMED HEIGHT OF THE TANK FOR BETTERLONGITUDINAL PRESSURE

We assumed 15 feet for better longitudinal pressure andTangential Pressure

H = 15 ft.

ITEM # 4 : CALCULATION OF RADIUS OF WATER TANKS:

FOR CYLINDRICAL TANK:FORMULA : V = rH


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V = Volume in Cubic Feet= 3.14 or 22/7, a constant

r = radius (half of the diameter) of the tankH = Height in Feet

Computation: r = (v/H )= (2000/15x )= 6.514 ft.

ITEM # 5: DIAMETER OF THE TANK

FORMULAD = 2rD = diameter

Computation: D = 2 x 6.514 D = 13.028

ITEM # 6: SHAPE AND FIGURE OF THE WATER TANK

FIGURE:

ITEM # 7: MASS OF WATER IN THE TANK:

FORMULA:M = D x VM = Mass of fluidD = Mass densityV = Volume of the Tank


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Comuputation: M = 62.4 x 2000 / 32.2M = 3875.77 slug

ITEM # 8 : CROSS SECTIONAL AREA OF THE TANK AT THEBOTTOM:

A = r UPPER VIEW:

Computation: A = (6.514)A = 20.464 ft

ITEM # 9 : GAUGE PRESSURE OF THE TANK:

PGAUGE = W / AW = Weight of tankA = Cross Sectional Area of the Tank

Calculation: PGAUGE = W / APGAUGE = 124 800 / 20.414P GAUGE = 6098.414lb/ft

ITEM # 10 : LONGITUDINAL STRESS OF CYLINDRICAL-TANK

Note: to avoid error additional 4 times the gauge pressure of tank

FORMULASL (4 x PGAUGE )


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Calculation : SL = 4 x 6098.44S L = 24 393.659 lb/ft

ITEM # 11 : ABSOLUTE PRESSURE IN WATER TANK:

FORMULA:PAB = PATM + PGAUGEPAB = ABSOLUTE PRESSUREPATM = ATMOSPHERIC PRESSUREPGAUGE = GAUGE PRESSURE

Calculation: PATM = 14.7 lb/inchPAB = (14.7 x 12 x 12lb/ft) + 6098.414P AB = 8 215.214 lb/ft

ITEM # 12 : MINIMUM THICKNESS OF WALL OF THE TANK:

Note: The minimum thickness of the tank is in longitudinal Stress

FORMULA:t = [PAB x D/4 x SL]t = thickness of the walled-cylindrical tankSL = longitudinal-stress

Calculation: t = [(8215.214 x 13.028) / (24 393.6594)] t = 1.097ft

Group no. Rate of

water flowin pipe

H2O tank

capacity

Approx.Height

fromground toelevated

watertank

Length ofdischarge

lineincluding

valvesand

fittings

Approx.distance

of freshH2O

supplyfrompump

1 300gpm 10 000gal 30ft 150ft 40ft2 350 15 000 35 175 353 450 20 000 40 200 30


7/10

4 500 25 000 45 225 285 600 30 000 40 250 256 200 12 000 25 300 427 250 13 000 22 350 388 150 8 000 42 400 23

9 375 17 000 48 450 20

Note:

1. Specify standard diagram of suction and dischargepipings. Include necessary valves, gauges and fittingsand other accessories. Provide connection for priming.

2. Give the complete specs of the pump suitable for thepurpose.

3. Design the most economical dimensions of the ff:

a. Elevated H2O reservoir, cylindrical body w/ conicalroof and hemispherical bottom.

b. Structural supports including columns, horizontalstructures and diagonal bracings (round bars), baseanchor bolts, concrete footings including rebars of thebars.

c. Air vents, manhole, access ladders, balcony includingcheckered footings.

d. Other accessories.

4. If the pump is directly connected to an electric motor,220v 3phase, 60hz, determine the standard table Hp ofthe motor, give complete specs.

5. Prepare the complete bill of the materials of the entire

installation according to the following format.6. Make a uniform scaled drawing.

ITEM #13: FOR MINIMUM MATERIAL NEEDED IN DESIGN(elevatedwater tank)


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Using: MAXIMA MINIMA from DIFFERENTIAL CALCULUS

Calculation:

V= r^2H

-least amount of material to be usedfor an open top cylindrical tank

D=HSince our design of water tank withD=15.04ft and H=15ftD is approximate to H then our materialis in minimum materials.

MATERIALS

ITEM #14: TANK STRUCTURE

The materials, design, fabrication, and erection of the boltedsteel tank shall conform to AWWA D103-97, to the Principle ofStandard Specification 12B of the American Petrolium Institute, orto Columbians specifications which are derived from engineeringprinciples, industry experiences, and the aforementioned

standards and specifications.

A. STEELSteel sheets shall conform to or shall be at least

equal to hot-rolled quality per ASTMA570 Grade 33 withminimum yield strength of 33000psi. Minimumthickness shall be 12gauge(0.0972 minimum).

B. PLATESSteel plates shall conform to or at least be equal

to the requirements of ASTM A36 with minimum yield

strength of 36000psi.C. ROLLED STRUCTURAL SHAPES

Rolled structural shapes shall conform to ASTMA36.

ITEM #15: TANK DESIGN STANDARD:


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1. The materials, design, fabrication, and erection of the boltedtogether tank shall conform to the AWWA Standard forFactorcy Coated Bolted Steel Tanks for Water Storage.

2. The tank coating system shall confirm solely to Section 10.6

Thermoset Powder Coatings of ANSI/AWWA D103, latestrevision.3. All materials furnished by the tank manufacturer, which are

in contact with stored water, shall be certified to meetANSI/NSF Additive Standard No. 61. Certification of adistributor, and not the tank or coating manufacturer, willnot be accepted.

4. The RTP(rolled, tapered panel) bolted tank design shall havelap joint connections on both vertical and horizontal shellseams. American Petroleum Institute(API 12B) flanged panel

tank design will not be acceptable.

ITEM #17: SEALANTS:1. The lap joint sealant shall be a one component, moisture

cured, polyurethane compound. The sealant shall be suitablefor contact with potable water and meet applicable FDA Title21 regulations, as well as, ANSI/NSF Additives Standard 61.

2. The sealant shall be used to seal lap joints, bolt connections,and sheet edges. The sealant shall cure to a rubber like

consistency, have excellent adhesion to the fusion coating,have low shrinkage, and be suitable for interior and exteriorexposure.

3. Sealant curing rate at 73 degrees F and 50% RH.a. Tack-free time: 6 to 8hours.b. Final cure time: 10 to 12days.

4. Neoprene gaskets and tape type sealer shall not be used inliquid contacting surfaces.

ITEM #18: SUPPORT PEDESTAL/COLUMN:-Concrete or steel pedestal design

A. The support column for the water storage tanks shallbe of jump-form concrete construction in accordance with ACIstandards 313-91 and ACI 371R-98.

B. Concrete:1. Compressive Strength


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a. Concrete support structure = 4000psi(28Mpa)

b. Foundation = 3500psi (24Mpa)2. Air Trainmen:

a. Per ACI 3183. Curing:a. Conform to ACI 318 and ACI 308b. Curing compounds shall be membraneforming or combination curing/surfacehardening typessConforming to ASTM C309

4. Formworka. Formwork design, installation and removalshall conform to the requirements of ACI 318

and the recommendation of ACI 347 R.5. Concrete Finish

a. Per Section 3.5 of ACI 371r-98b. A beveled-edge rectangular pattern (thesize of the 4 tall jump forms) shall be formedinto the outer column surface.

ITEM #19: HYDROSTATICS:1. Following completion of erection and cleaning of the tank,

the structure shall be tested for liquid tightness by fillingtank to its overflow elevation.2. Any leaks disclosed by this test shall be corrected by the

erector in accordance with the manufacturersrecommendations.

3. Water required for testing shall be furnished by the Owner atthe time of tank erection completion and at no charge to theContactor. Disposal of test water shall be the responsibilityof the Contactor.

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