PDVSA N° TITLE

REV. DATE DESCRIPTION PAG. REV. APPD. APPD.

APPD.BY DATEDATE

VOLUME 21

� PDVSA, 1983

ORIGINAL

Alexis Arévalo Jesús E. RojasDEC.98 DEC.98

ENGINEERING SPECIFICATION

MAR.92

DEC.98 Y.K.1

0

GENERAL REVISION 2

1

A.A.

J.S.

J.E.R.

E.S.

ENGINEERING DESIGN MANUAL

SPECIALISTS

APPD.BY

A2.701 VESSELS TOLERANCES(VERTICAL AND HORIZONTAL)

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(ELEVATION)VESSEL; TOLERANCES

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5

15

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2918

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3

4

20

10

7

9

21

11

8

22

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26

26

23

23

25

24

28

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1

2627

26

26

1. HEIGHT FROM BASE LINE TO FACE OF TOP NOZZLE

± 1/4” OR 1/64” PER FOOT OF HEIGT 3/4” MAX.

2. NOZZLES FOR AGITATOR MOUNTING SHALL HAVEFLANGE FACE ALIGNED WITHIN 1/4” OF SPECIFIEDPLANE PLUS REQUIREMENTS OF NOTE 28.

3. DISTANCE FROM BOTTOM TO TOP OF TRAY SUPPORTS ± 1/8”

4. WEIR HEIGHT± 1/16” MEASURED AT HIGH POINT OF WEIR.5. VERTICAL CLEARANCE UNDER DOWNFLOW PLATE FOR

INSTALLED TRAYS ± 1/16”.

6. FACE OF NOZZLE TO CENTERLINE OF VESSEL..... ± 1/8”

7. ALIGNMENT OF FLANGE FACE OF NOZZLE SHALL BEWITHIN 1/2” OF SPECIFIED PLANE.

8. LOCATION OF SHELL NOZZLES FROM BASE LINE SHALL

BE ± 1/4” FOR SHOP FABRICATED VESSELS OR SUB–ASSEMBLIES: AND ± 1/2” FOR FIELD ASSEMBLEDVESSELS. WHEN LOCATION IS SPECIFIED FROM OTHERREFERENCE POINTS, TOLERANCE SHALL BE ... ± 1/8”

9. ALIGNMENT OF FLANGE FACE OF MANWAY SHALL BEWITHIN 1° OF SPECIFIED PLANE.

10. FACE OF MANWAY TO CENTERLINE OF VESSEL ...± 1/2”

11. LOCATION OF MANWAYS FROM BASE LINE SHALL BE± 1/2” FOR SHOP FABRICATED VESSEL AND SUBASSEMBLIES AND + 1” FOR FIELD ASSEMBLED VESSELS

12. BOTTOM OF VESSEL SUPPORT TO BASE LINE + 0”,–1/32PER FOOT OF VESSEL DIAMETER , 1/2” MAX.

13. FOR SUPPORTS LOCATED ABOVE BASELINE, TOLERANCES SHALL BE + 0”,–1/32” PER FOOT OF VESSEL DIAMETER, 1/2”MAX.

14. ALIGMENT OF CYLINDRICAL SHELL SECTIONS SHALL BETRUE AND STRAIGHT WITHIN 0.01” PER FOOT OF HEIGHTFROM BASE LINE BUT SHALL NOT EXCEED...3/4”

15. HIGH–POINT TO LOW–POINT OF INSTALLED TRAY LEVEL AND PLANE WITHIN THE FOLLOWING.

VESSEL ID *CLASS A *CLASS B

< 60” 1/8” 3/16”

>60” TO <120” 3/16” 1/4” >120” 1/4” 3/8”

16. FAR SIDE OF TOWER TO PLATE ....±1/8”

17. WEIRS SHALL BE LEVEL WITHIN ± 1/16” FROM A LEVEL PLANE AT THE MIDPOINT OF THE WEIR.

18. TRAY SPACING ± 1/8”

19. LOCATION OF TRAY PLATES FROM BASE LINE ...+1/8”

* CLASS A AND CLASS B TOLERANCES WILL BE GOVERNED BY THE TYPE OF TRAY SPECIFIED. THIS INFORMATION WILL BE PER THE TRAY SPECIFICATION SHEET/HYDRAULICS.

THESE TOLERANCES APPLY TO VERTICAL & HORIZONTALVESSELS EXCEPT AS OTHERWISE NOTED ON VESSELDRAWING/DATA SHEET RELATING TO SPECIFIC VESSELS

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REVISION FECHA

ENGINEERING DESIGN MANUAL

VESSEL TOLERANCES(VERTICAL AND HORIZONTAL) DEC.981

PDVSA A2.701

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REVISION FECHA

ENGINEERING DESIGN MANUAL

VESSEL TOLERANCES(VERTICAL AND HORIZONTAL) DEC.981

PDVSA A2.701

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.Menú Principal Indice manual Indice volumen Indice norma

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VESSEL; TOLERANCES(ORIENTATION)

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14

SADDLE

CLIPNOZZLE

ORIENTATION LINE(REFERENCE)

MANWAY

1. LOCATION OF SADDLE FROM ORIENTATION SHALL BE +3/16”2. LOCATION OF CLIPS FROM ORIENTATION LINE SHALL BE + 1/4”

3. LOCATION OF NOZZLES FROM ORIENTATION LINE SHALL BE + 3/16

4. LOCATION OF MANWAYS FROM ORIENTATION LINE SHALL BE + 1”5. ALLWABLE TOLERANCE ON NOZZLE BOLT HOLE ORIENTAATION + 1/16”

THESE TOLERANCES APPLY TO VERTICAL & HORIZONTAL VESSELS EXCEPT AS

OTHERWISE NOTED ON VESSEL DRAWINGS/DATA SHEETS RELATING TO SPECIFIC VESSELS

FLANGE C BOLT CIRCLEL

5

ORIENTATION LINE VERTICALVESSELS IS BASED ON A DIRECTIONALCENTERLINE (EX. NORTH. SOUTH ETC..)VESSELS IS BASED ON THE HORINZONTALCENTERLINE

v–tol

20. DEVIATION FROM AVERAGE I.D. (AS DETERMINED BY

STRAPPING) FROM NOMINAL I.D.: ±1/4” A.S.M.E CODESECTION VIII TO APPLY TO OUT–OF–ROUNNES EXCEPTWHEN NOTED OTHERWISE

21. PIPE OR WALKWAY SUPPORTS AND STRUCTURAL ATTACHMENTS TO: VESSEL CENTERLINE.... ±1/8”: BASE LINE ....± 1/4”

22. LOCATION OF HORIZONTAL VESSEL SUPPORT FROM VESSEL CENTERLINES.... +0 –1/8”

23. LOCATION OF HORIZONTAL VESSEL SUPPORTS FROM BASE LINE....+1/4” SUPPORTS LOCATED FROM OTHER REFERENCE POINTS.... +1/8”

24. LOCATION OF BOTTOM NOZZLE FLNAGE FACE FROM BASE LINE SHALL BE ...+1/4”

25. LIGHT CENTER PUNCH MARK (WITH A ROUND NOSE STAMP) THE PRINCIPAL CENTER LINES SHOWN ON ORIENTATION PLAN. CIRCLE PUNCH MARKS WITH PAINT TO DESIGNATE LOCATION.26. SUPPORTS OUT OF LEVEL OVER ANY DIAMETER THE GREATER OF + 1/8” OR +0.02” PER FOOT OF VESSEL DIAMETER, 3/8” MAX.

27. BOLT HOLES WITHIN 1/8” OF SPECIFIED LOCATION

28. IF BOTTOM FLANGE IS USED AS FOOT BEARING MOUNT AND WITH AGITATOR MOUNTIHG FLANGE HORIZONTAL, A PLUMB BOB DROPPED FROM CNTR. OF TOP FLANGE SHALL FALL WITHIN 0.025” PER FOOT (OF DIST. BETWEEN FLG. FACES) OF CENTER OF BTM. FLG., AND BTM. FLG. SHALL BE NOT MORE THAN 1/4” OFF HORIZONTAL.

29. HORIZONTAL CLEARRANCE BETWEEN DOWNFLOW PLATE AND TOP OF INLET WEIR + 1/16”

30. FOR POST SUPPORTED TRAYS, CLEARANCE BETWEEN TRAY COLLAR AND SHELL 0.015” MAX. OVER 90% OF CIRCUMFERENCE,+ 1/16” MAX. OVER REMAINING 10%