PROCESS INDUSTRY PRACTICES
FABRICATION/INSTALLATION DETAILS
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VESSEL; TOLERANCES
(ELEVATION)
vEFV 1 10 2
DRAWING DATE: 05/01/06
REAFFIRMED
PAGE 1 OF 2
PRACTICE REF. '<f:FV1100
1. HEIGHT FROM BASE LINE TO FACE OF TOP NOZZLE
± 1/4" OR 1/64• PER FOOT OF HEIGHT 3/4" MAX.
2. NOZZLES FOR AGITATOR MOUNTING SHALL HAVE
FLANGE FACE ALIGNED WITHIN 1/4 DEG. OF SPECIFIED
PLANE 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 Pl.A TIE FOR
INSTALLED TRAYS ± 1/16"
6. FACE OF NOZZLE TO CENTERLINE OF VESSEL ± 1/8"
7. ALIGNMENT OF FLANGE FACE OF NOZZLE SHALL BE
WITHIN 1/2 DEG. OF SPECIFIED PLANE.
8. LOCATION OF SHELL NOZZLES FROM BASE L!NE SHALL
BE ± 1/4" FOR SHOP FABRICATED VESSELS OR SUBASSEMBLIES AND ± 1/2" FOR FIELD ASSEMBLEO
VESSELS. WHEN LOCATION IS SPECIFIEO FROM OTHER
REFERENCE POINTS, TOLERANCE SHALL BE ± 1/8".
9. ALIGNMENT OF FLANGE FACE OF MANWAY SHALL BE
WITHIN 1 DEG. OF SPECIFIED PLANE.
10. FACE OF MANWAY TO CENTERLINE OF VESSEL ± 1/2"
11. LOCATJON OF MANWAYS FROM BASE LINE SHALL BE
± 1/2" FOR SHOP FABRICATED VESSELS AND SUBASSEMBLIES AND ± 1• FOR FIELD ASSEMBLED VESSELS.
12. BOTTOM OF VESSEL SUPPORT TO BASE LINE +0",-1/32"
PER FOOT OF VESSEL DIAM ETIER, 1/2" MAX.
13. FOR SUPPORTS LOCATIED ABOVE BASELINE, TOLERANCES
SHALL BE +0",-1/32" PER FOOT OF VESSEL DIA.,1/2" MAX.
14. ALIGNMENT 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".
1~. HIGH-POINT TO LOW-POINT OF INSTALLED TRAY LEVEL
AND PLANE WITHIN THE FOLLOYt'ING:
VESSEL ID
• CLASS A
~ 60"
1/8"
>60" TO ~ 120"
3/16"
> 120·
1/4"
16. FAR SIDE OF TOWER TO WEIR PLA'fE ± 1/8"
17. WEIRS SHALL BE UEVEL W1THIN ± 1/16" FROM A LEVEL
PLANE AT THE MIDPOINT OF THE WEIR.
18. TRAY SPAONG :!: 1/8"
19. LOCATION OF TRAY PLATES FROM BASE LINE ±1/8"
20. DEVIATION FROM AVERAGE l.D. (AS DETIERMINED BY
S1RAPPING) FROM NOMINAL 1.0.: ± 1/4" ASME CODE
SECTION VIII TO APPLY TO OUT- OF- ROUNDNESS EXCEPT
WHEN NOTIED OTHERW1SE.
21. PIPE OR WALK.WAY SUPPORTS AND STRUCTURAL
ATTACHMENTS TO: VESSEL CENTERLINE ± 1/8";
BASE LINE ± 1/4".
22. LOCATION OF HORIZONTAL VESSEL SUPPORT FROM
VESSEL CENTERLINES +o• , -1/8"
23. LOCATION OF HORIZONTAL VESSEL SUPPORTS FROM
BASE LINE ± 1/4"; SUPPORTS LOCATED FROM
OTHER REFERENCE POINTS ::1:1/8"
24. LOCATION OF BOTTOM NOZZLE FLANGE FACE FROM
BASE LINE SHALL BE ± 1/4".
25. LIGHT CENTIER 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
GREATIER OF ± 1/8" OR ± 0.02" PER FOOT OF
VESSEL DIAMETIER, 3/8" MAX.
27. BOLT HOLES WITHIN 1/8" OF SPECIFIED LOCATION
28. IF BOTTOM FLANGE IS USEO AS FOOT BEARING
MOUNT AND WITH AGITATOR MOUNTING FLANGE
• CLASS A AND CLASS B TOLERANCES WILL BE GOVERNEO
HORIZONTAL, CENTER OF TOP FLANGE SHALL FALL
BY THE TYPE OF TRAY SPECIFIED. THIS INFORMATION
WITHIN 0.025" PER FOOT (OF DISTANCE BETWEEN
WILL BE PER THE "TRAY SPECIFICATION SHEET/HYDRAULICS.
FLANGE FACES) OF CENTER OF BOITOM FLANGE AND
BOTTOM FLANGE SHALL BE NOT MORE THAN 1/4 DEG.
OFF HORIZONTAL
29. HORIZONTAL CLEARANCE BETWEEN DOWNFLOW PLATE
THESE TOLERANCES APPLY TO VERTICAL lie HORIZONTAL
AND TOP OF INLET WEIR ± 1/16"
VESSELS EXCEPT AS OTHERW1SE NOTED ON VESSEL
30. FOR POST SUPPORTIED TRAYS, CLEARANCE BETWEEN
DRAWING/DATA SHEET RELATING TO SPECIFIC VESSELS.
TRAY COLLAR AND SHELL 0.015• MAX. OVER so,; OF
CIRCUMFERENCE, ± 1/16" MAX. OVER REMAINING 10X.
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