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
From 0º - 180º 0 - 40 feet (0 -12,2 M)
From 45º - 225º 40 - 150 feet (12,2 - 45,75 M)
From 90º - 270º 150 - 250 feet (45,75 - 76,25 M)
Cone Roof (any Flate Roof & Dome Roof) From 135º - 315º 250 lebih feet (>76,25 M)
Radius Toleransi
Long Seam Weld (Butt Weld) ± ½ inch (12,25 MM)
± ¾ inch (18,38 MM)
± 1 inch (25,4 MM)
± 1¼ inch (31.75MM)
Circum Weld
3. Check Circumference of a circle ( OD x Pi)
4. Check Levelness (Vertical & Horizontal)
T. Joint 5. Check Peaking (Make Mall of wood)
Shell
R of Tank
Welding position
915 mm
Bottom Plate
any Flate Bottom & Slope Bottom max 13 mm
915 mm
Fillet Weld
0O 6. Check Bending
315O 45O
Welding position
915mm
max 13 mm
270O 90O
225O 135O
7. Check Plumbness (Verticality)
180O 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
Asphalt
Concrete
Foundation
Elevation
0O
315O 45O
Check Elevation (Typical)
270O 90O
225O 135O
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
225O 135O
180O
a. Check Fit-up Joint as per Procedure Specification
b. Check Roundness (Dimensional Inside Diameter)
as per 2 shell Tank after finish Diameter Range Radius Toleransi
From 0º - 180º 0 - 40 feet (0 -12,2 M) ± ½ inch (12,25 MM)
From 45º - 225º 40 - 150 feet (12,2 - 45,75 M) ± ¾ inch (18,38 MM)
From 90º - 270º 150 - 250 feet (45,75 - 76,25 M) ± 1 inch (25,4 MM)
From 135º - 315º 250 lebih feet (>76,25 M) ± 1¼ inch (31.75MM)
3. Check Circumference of a circle ( OD x Pi)
4. Check Levelness (Vertical & Horizontal)
5. Check Peaking (Make Mall of wood)
R of Tank
Welding position
915 mm
915 mm
max 13 mm
6. Check Bending
Welding position
915mm
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 270O
H 90O
B
Bottom Plate
225O 135O
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 J.TC.02 J.TC.03
W.031
Drawing No.
W.013 W.022
Date
Join No.
J.LS.02 J.LS.01
W.016 W.011 Welder Stamp
Code & Standard
4. Installation Nozzle & Manhole
Reinforcing Plate
0O
315O 45O
270O 90O
45º
135O
225O
180O
Formula Check of Dimensional Nozzle :
Check Circumference of a circle ( OD x Pi)
Inspection of Nozzle & Manhole Angle fo Circle X Circumference of a circle =
360º
Check Orientation Nozzle
Check Dimensional & Elevation Nozzle Example :
Check Fit-up OD of Tank : 10300 mm x 3.14 = 32.358 mm
Check Visual Welding
Penentrant Test Joint Welding of nozzle (to knowledge weld defects) 45º X 32.358 = 4.044.7 mm
360º
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
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
47 mm H2O
MPRESSOR
FROM
COMPRESS
FROM
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
Mas Sugeng Riyadi yang Ganteng
he he he he he he he
