During the Material Receiving Inspection of the 5th Shipment at the Storage Yard of Gumti site, damages with plastic deformation had been found in the SCCD material delivery from J&M located in Myanmar. The bended damages were recorded in the NCR submitted to the Engineer for notification and inspected/witnessed by the Engineers representative during the RFI inspection. Investigations have been conducted to determine the root cause of the damages on the SCCD. The result of the investigation think that it was caused by rough handling during transportation in Chittagong port by the personnel who handled the SCCD from unloading, loading and shifting the SCCD from one place to another.  |
| Markings. Using thermal Chalks to control the temperature not more than 600 Fahrenheit. Chalk will melt if the temperature exceeds the required. |
 |
Straightening shall be carried out by heating, the steel shall be heated not higher than temperature of 600℃. The temperature shall be measured by thermal control crayons. The SCCD shall be re-bended until the SCCD reaches the original position and design or until acceptable tolerance is attained. After heating, the material shall be cooled slowly in air without any forced cooling method.
|
After the repair of the damaged SCCD, internal checking shall be carried out and checked following the table below for the allowable flatness of SCCD panel required by the Specification table below.
 |
| Gap Verification not more than 6mm |
 |
| Verification of Angle |
 |
| Striaghtness Check |
Damaged or repaired part shall be checked within allowable tolerance value specified by the table below.
|
Item
|
Tolerance(mm)
|
|
Flatness
|
w/150 (w : Plate Length)
|
Visual check on repairing area shall be inspected internally and with the presence of the Engineers Representative. RFI shall be submitted:
>After surface treatment on damaged area (Internal Inspection).
>After painting on repaired area (Engineer Inspection).
After finished final coat, DFT (Dry Film Thickness) shall be measured with DFT meter (Engineer Inspection).
No comments:
Post a Comment