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PDVSA ENGINEERING DESIGN MANUAL VOLUME 21 ENGINEERING SPECIFICATION

PDVSA N°

TITLE

VESSELS TOLERANCES (VERTICAL AND HORIZONTAL)

A2.701

1

DEC.98

GENERAL REVISION

2

0

MAR.92

ORIGINAL

1

REV.

DATE

APPD.BY Alexis Arévalo

E PDVSA, 1983

DESCRIPTION DATE

Y.K.

PAG. REV.

DEC.98 APPD.BY Jesús E. Rojas

A.A.

J.E.R.

J.S.

E.S.

APPD.

APPD.

DATE

DEC.98

SPECIALISTS

ENGINEERING DESIGN MANUAL

PDVSA

PDVSA A2.701

VESSEL TOLERANCES (VERTICAL AND HORIZONTAL)

REVISION

FECHA

1

DEC.98

Página 1 .Menú Principal

Indice manual

Indice volumen

Indice norma

VESSEL; TOLERANCES

2

(ELEVATION)

16 15

1. HEIGHT FROM BASE LINE TO FACE OF TOP NOZZLE

± 1/4” OR 1/64” PER FOOT OF HEIGT 3/4” MAX. 17 5

14

2. NOZZLES FOR AGITATOR MOUNTING SHALL HAVE FLANGE FACE ALIGNED WITHIN 1/4” OF SPECIFIED PLANE PLUS REQUIREMENTS OF NOTE 28.

18

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

29

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

3

INSTALLED TRAYS

±

1/16”.

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

4

19

7. ALIGNMENT OF FLANGE FACE OF NOZZLE SHALL BE WITHIN 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 ASSEMBLED VESSELS. WHEN LOCATION IS SPECIFIED FROM OTHER REFERENCE POINTS, TOLERANCE SHALL BE ... ± 1/8”

6 1 20

9. ALIGNMENT OF FLANGE FACE OF MANWAY SHALL BE WITHIN 1° OF SPECIFIED PLANE. 7

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 SUB ASSEMBLIES AND + 1” FOR FIELD ASSEMBLED VESSELS

21

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

10 9

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

22

14. ALIGMENT OF CYLINDRICAL SHELL SECTIONS SHALL BE TRUE AND STRAIGHT WITHIN 0.01” PER FOOT OF HEIGHT FROM BASE LINE BUT SHALL NOT EXCEED...3/4”

26

8

22

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

26

VESSEL ID

*CLASS A

< 60”

11

23

>60” TO 120”

23

13

24

12

26

* 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 & HORIZONTAL VESSELS EXCEPT AS OTHERWISE NOTED ON VESSEL DRAWING/DATA SHEET RELATING TO SPECIFIC VESSELS

1/4” 3/8”

17. WEIRS SHALL BE LEVEL WITHIN ± 1/16” FROM A LEVEL PLANE AT THE MIDPOINT OF THE WEIR. 18. TRAY SPACING ± 1/8”

26

27

3/16”

3/16” 1/4”

16. FAR SIDE OF TOWER TO PLATE ....±1/8” 25

28

*CLASS B

1/8”

26

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

ENGINEERING DESIGN MANUAL

PDVSA

PDVSA A2.701

VESSEL TOLERANCES (VERTICAL AND HORIZONTAL)

REVISION

FECHA

1

DEC.98

Página 2 .Menú Principal

Indice manual

Indice volumen

Indice norma

20. DEVIATION FROM AVERAGE I.D. (AS DETERMINED BY STRAPPING) FROM NOMINAL I.D.: ±1/4” A.S.M.E CODE SECTION VIII TO APPLY TO OUT–OF–ROUNNES EXCEPT WHEN NOTED OTHERWISE

VESSEL; TOLERANCES (ORIENTATION)

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

ORIENTATION LINE (REFERENCE)

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”

2

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

3

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

4 1

CLIP NOZZLE

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%

MANWAY

SADDLE

ORIENTATION LINE VERTICAL VESSELS IS BASED ON A DIRECTIONAL CENTERLINE (EX. NORTH. SOUTH ETC..) VESSELS IS BASED ON THE HORINZONTAL CENTERLINE

5 FLANGE

C L BOLT CIRCLE

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

v–tol