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MONITORING & CHECK FABRICATION & ERECTION STORAGE TANK 1. Inpection Receiving Material from Supplier (Visual, Dimensional, Qty, Mill Certificate & Way Bill) 2. Study & understanding Detail Drawing, Specification, Fabrication Procedure, WPS / PQR & ITP (Inspection & Test Plant) 3. Plat before Cutting, Please Check Dimensional & Identification, Check Bevelling & Check Bending 4. Bending Plate must be Primer Coat before Installation at Fabrication Site Please Check Thickness of Paint DFT as per requirement
Fabrication : 1. Check Fit-up Joint as per Procedure Specification 2. Check Roundness (Dimensional Inside Diameter) as per each Course Tank Diameter Range 0 - 40 feet (0 -12,2 M) 40 - 150 feet (12,2 - 45,75 M) 150 - 250 feet (45,75 - 76,25 M) 250 lebih feet (>76,25 M)
From 0º - 180º From 45º - 225º From 90º - 270º
Cone Roof (any Flate Roof & Dome Roof)
From 135º - 315º
Radius Toleransi ± ½ inch (12,25 MM) ± ¾ inch (18,38 MM) ± 1 inch (25,4 MM) ± 1¼ inch (31.75MM)
Long Seam Weld (Butt Weld)
Circum Weld
3. Check Circumference of a circle ( OD x Pi) 4. Check Levelness (Vertical & Horizontal)
T. Joint
Shell
5. Check Peaking (Make Mall of wood)
Bottom Plate
any Flate Bottom & Slope Bottom Fillet Weld
915 mm
Welding position
max 13 mm
R of Tank
915 mm
0O 315O
6. Check Bending 45O
270O
915mm
Welding position
90O
max 13 mm
135O
225O 180O
7. Check Plumbness (Verticality) All Corner above : 0º, 45º, 90º, 135º, 180º, 225º, 270º, 315º. Tolerancy per 1000 mm / 1 mm A Shell Plate Plumb bob
H B
Bottom Plate
5. Check Visual Welding 6. Check NDE Report such as PT & RT Please Check Specification requirement for Tank above
Erection Work : 1. Check Foundation Elevation Slope of Concrete & Asphalt Concrete Foundation
Asphalt
Elevation
0O 315O
45O Check Elevation (Typical)
270O
90O
135O
225O 180O
2. Check Foundation Orientation of Centerline Concrete 3. Please ensure that Foundation already handover from civil to mechanical and already check all together if all OKE check so :
4. Installation Base Plate Cocrete Asphalt Base Plate annuler type
Vacuum Test of Base Plate (to knowlegde Leakage of baseplate)
Shell Vacuum Gauge Vacuum Box Welding Joint to be tested
Glass
FROM COMPRESSOR
OUT
mm mm Check Distance edge from Bottom Asphalt or Baseplate as per drawing
Inspection of Baseplate : Check Orientation Check Dimensional Check Fit-up Joint & Bevel Check Visual Welding Penentrant Test Joint Welding of baseplate (to knowledge weld defects)
4. Installation as per 2 shell till finish
0O 315O
45O
270O
90O
135O
225O 180O
a. Check Fit-up Joint as per Procedure Specification b. Check Roundness (Dimensional Inside Diameter) as per 2 shell Tank after finish From 0º - 180º From 45º - 225º From 90º - 270º From 135º - 315º
3. Check Circumference of a circle ( OD x Pi) 4. Check Levelness (Vertical & Horizontal) 5. Check Peaking (Make Mall of wood)
R of Tank
915 mm
Welding position
6. Check Bending
max 13 mm
915 mm
Diameter Range 0 - 40 feet (0 -12,2 M) 40 - 150 feet (12,2 - 45,75 M) 150 - 250 feet (45,75 - 76,25 M) 250 lebih feet (>76,25 M)
Radius Toleransi ± ½ inch (12,25 MM) ± ¾ inch (18,38 MM) ± 1 inch (25,4 MM) ± 1¼ inch (31.75MM)
915mm
Welding position
max 13 mm
7. Check Plumbness (Verticality) All Corner above : 0º, 45º, 90º, 135º, 180º, 225º, 270º, 315º. Tolerancy per 1000 mm / 1 mm
0O 315O
45O
A Shell Plate Plumb bob
H B
270O
90O
Bottom Plate
135O
225O
5. Check Visual after Welding
180O
6. Check Penetrant Test or Kerosin Test between Shall with Bottom Plate Please Check Specification requirement for Tank above
Kerosin Test POWDER (CHALK) DIESEL FUEL
7. Check Radiographic Test at Longseam Weld & Circum weld as per Specification Please Check Specification requirement for Tank above
On Tank must be marking Joint No. & Welder Stamp. On film RT must be marking : Project Name J.TC.01 W.031
J.TC.02 W.013
J.TC.03 W.022
J.LS.02 W.016
Drawing No. Date
J.LS.01 W.011
Join No. Welder Stamp Code & Standard
4. Installation Nozzle & Manhole Reinforcing Plate 0O 315O
45O
270O
90O
45º
135O 225
O
180O
Formula Check of Dimensional Nozzle :
Check Circumference of a circle ( OD x Pi) Inspection of Nozzle & Manhole Check Orientation Nozzle
Angle fo Circle X Circumference of a circle = 360º
Check Dimensional & Elevation Nozzle Check Fit-up Check Visual Welding Penentrant Test Joint Welding of nozzle (to knowledge weld defects)
Example : OD of Tank : 10300 mm x 3.14 = 32.358 mm 45º 360º
X 32.358 = 4.044.7 mm
Pneumatic Test of Reinforcing Pad Test of Base Plate (to knowlegde Leakage of baseplate) Pressure Gauge
Reinforcement Plate Shell Plate
NOZZLE
FROM Compressor
4. Installation Roof (Cone Roof, Floating Roof, Lifter Roof, Plain Breather Roof, Dome Roof, Flate Roof
or Vapour Dome Roof)
Ventilation
Inspection of Nozzle & Manhole
FROM MPRESSOR
47 mm H2O
Check Orientation Nozzle Check Dimensional & Elevation Nozzle Check Fit-up Check Visual Welding Penentrant Test Joint Welding of nozzle (to knowledge weld defects) Vacuum Test Hydrostatic Test or Internal Air Pressure
FROM COMPRESS
4. Others Test Water filling to Knowledge Settlement & Leakage Methode : Filling the water 25% hold & check elevation Filling the water 50% hold & check elevation Filling the water 75% hold & check elevation Filling the water 100% hold & check elevation & Leakage
If Oil Tank for Bussines must be TERA (Calibration) by Government BY
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