tank construction

8/8/2019 Tank Construction

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TANK CONSTRUCTION TANK CONSTRUCTION

ANNULAR PLATES

BOTTOM PLATES

SHELL PLATES

ROOF STRUCTURES

ROOF PLATES

MANHOLES & NOZZELSSTAIRWAYS

PLATFORMS


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TYPES OF TANKS TYPES OF TANKS

CONE ROOF

DOME ROOF

INTERNAL FLOATING ROOF

EXTERNAL FLOATING ROOF

FLAT ROOF


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TYPES OF FOUNDATIONS TYPES OF FOUNDATIONS

FULL CONCERETE FOUNDATIONBOTTOM SLOPE FOUNDATION

FLAT BOTTOM FOUNDATION

RINGWALL FOUNDATION


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CONSTRUCTIONCONSTRUCTION

SEQUENCESEQUENCE1. LAY OUT ANNULAR PLATES

2. LAY OUT BOTTOM PLATES

3. ERECT 1ST SHELL COURSE

4. FITUP AND TACK WELD BOTTOM TOSHELL OINT !CORNER OINT"

#. FITUP AND TACK $ERTICAL OINTS

%. ALLIGN $ERTICAL OINTS WITH KEYPLATES

. START WELDING OF $ERTICAL FROMOUTSIDE !$1' $2' $3 AND $4"


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CONTINUE(.CONTINUE(.

). BACKGOUGE $ERTICAL*S FROM INSIDE

+. START WELDING $ERTICALS FROM INSIDE

1,. ERECT 2ND SHELL COURSE PLATES

11. FITUP AND TACK WELD $ERTICALS12. ALLIGN USING KEY PLATES

13. DO NOT FIT UP HORIZONTAL OINTS TILL YOU COMPLETE $ERTICAL OINTS

14. CONTINUE THE SAME PROCESS FOR$ERTICALS

1#. FOLLOW THE SEQUENCE.


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BOTTOM PLATE ERECTION AND WELDING SEQUENCE

BOTTOM PLATES


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1 1

2

2

4 4

4 4

33

3 3

55

5 5

W-/0

S--5-

W-/-67

1 2

2 2

3 2

4 2 86 4

# 2 86 4


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BOTTOM PLATE LAYOUTBOTTOM PLATE LAYOUT


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TANKAGE

BOTTOM PLATE ERECTION

ERECTION WELDING BY SAW PROCESS

BOTTOM PLATE JOINT TESTING

VACUUM BOX TESTING

Testing Requirements

• 100% vacuum box test shall be carried our for allbottom welds.

• 100% Visual Insection shall be erformed for allbottom welds rior to vacuum box test.


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ANNULAR PLATE ERECTION & TESTING


•100% Visual Insection shall be erformed.

• 100% Vacuum box test shall be erformed.•!adio"rah# test shall be carried out as er $I &50'lause (.1.2.

TANKAGE

CORNER WELD JOINT (ANNULAR TOSHELL)

OIL PENETRATE TESTING (OPT)


•)* on the entire len"th after 1st ass of weldin" andafter comletion of first die weldin".•Inside fillet welds in a c#lindrical flat+bottom tan, shall beexamined b# either -#e+enetrant or et+fluorescentma"netic article method before h#drotest.•100% Visual Insection shall be erformed.


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G88/ F09 : ;/ -/ ?8998@98 7- 8097

SELL PLATES ERECTION AN! "EL!INGSELL PLATES ERECTION AN! "EL!ING

SE#UENCESE#UENCE

/)**) $*

$*


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SHELL ERECTIONSHELL ERECTION


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TANKAGE

TANK SHELL VERTICAL WELDING WITH EGW PROCESS

ELECTRO GAS "EL!ING (EG")


• 100% Visual Insection shall be erformed after comletion of weld.

• 100% I ma"netic article test6 shall be done for inside or outside of the 7oint weld face side6

• !adio"rah# testin" shall be carried out as er $I &50 clause (.1.2.


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TANK SHELL HORIZONTAL WELDING WITH SAW PROCESS

TANKAGE

SUB$MERGE! ARC "EL!ING (SA")


• 100% Visual Insection shall be erformed after comletion of weld.



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TANKAGE

SIEL!E! METAL ARC "EL!ING (SMA")


•100% Visual Insection shall be erformed after comletion of weld.


TAN% SELL BELO" &MM TIC% "EL!ING "IT SMA" PROCESS


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KEY PLATE INSTALLATIONKEY PLATE INSTALLATION


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V1V2 V3 V4

V5

F09 : ;/ T;5= >-/ 9- $-6905; 8097

W-/ 9- $-6905;7 -/ 9- -6905;7


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V1 V2 V3 V4 V5

F09 : ;/ T;5= >-/ 9- $-6905; 8097 8< 2/ 7-

W-/ 9- $-6905;7 -/ 9- -6905;7


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'ACTORS A''ECTING TE CONSTRUCTION'ACTORS A''ECTING TE CONSTRUCTION

1. I!)! 8I*9: I$*' )! I$I;


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FACTORS TO BE CONSIDERED DURINGFACTORS TO BE CONSIDERED DURING

CONSTRUCTIONCONSTRUCTION

ROUNDNESSPLUMBNESS

PEAKING

BANDING

MISALLIGNMENTS

EXCESSI$E WELD DEPOSIT

HEAT INPUT CONTROL


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TANKAGE

TANK SHELL INSPECTION REQUIREMENTS AS PER STD

ROUNDNESS CHECKING PICKING / BANDING PLUMBNESS

MAGNETIC PARTICLE TESTING ONTEMP. SUPPORT & VERTICAL JOINTS

TESTING OF SHELL JOINTS USINGTFD METHOD INSTEAD OF RT

TESTING OF SHELL JOINTS USINGRADIOGRAPHIC METHOD (RT)


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OTHER MAIN FACTORS TO BEOTHER MAIN FACTORS TO BE

CONSIDERED IN CONSTRUCTIONCONSIDERED IN CONSTRUCTION

PROPER $ENTILATION

A$OID $ACCUM PRESSURE

CORNER OINT WELD TO BE COMPLETED

AFTER 3RD SHELL ERECTION

INSTALL ER$ !EMERGENCY RELIEF $AL$E"

BEFORE BOX UP.

INSTALL SUPPORTI$E SLINGS' IN

AGGRESSI$E WEATHER CONDITIONS.


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TANK FAILURE !$ACCUM" TANK FAILURE !$ACCUM"


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TANK FAILURE TANK FAILURE


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THANK YOU THANK YOU

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