hull block inspection
TRANSCRIPT
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Technical Seminar
HULL BLOCK INSPECTIONHULL BLOCK INSPECTION
TUNGLINH
27th Feb, 2012
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1.PREPERATION• Standards (acceptance criteria): Yard Quality Standard, IACS Rec.47
• List of WPS, Material Certificates
• Approved Drawing + Letter, Fire divisions (superstructure)
• NDT condition
• QC Inspection Record
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2.SAFETY FIRST“Our work is never so urgent or important
that one cannot take time to do it safely.”
CHECK LIST:
• Personal Protective Equipment (PPE)
• Scaffold, ladder, harness
• Ventilation
• Protected opening
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3.EXECUSION1. Surveyor equipments
2. Deformation & Straightness
3. Misalignment, Missing of structure
4. Thickness, Material grade
5. Criteria areas
6. Continuous of structure
7. Welding sequence & Welding defects
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3.1 Surveyor EquipmentsWeld Gauges
Hammer
Ruler
Taper Gauge
Gap Thickness Feeler Gauge
Caliper
Camera
Light
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3.2 Deformation & Straightness IACS Rec.47, Table 6.10, 6.11
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3.3 Misalignment
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3.4 Material & Thickness Base on Expansion Drawing to define Grade of Material & Thickness of
Plating and Stiffeners
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3.5 Criteria Areas Approved Drawing List of criteria areas + NDT areas
Marked defects of QC
High grade material
Curved form plating
WT, OT bulkhead
(prevent leaking of water)
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3.5 Criteria Areas Beside that: High stress, high corrosion areas
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High stress areas Side shell, Strong member (girder, stringer)
Conner
Toe of brackets
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High stress areas
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High corrosion areas Ballast tanks PSPC
Stern, Fore of ship
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High corrosion areas
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High corrosion areas
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3.6 Continuous of structure
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3.7 Welding sequence & Welding defectsWelding plan
IACS Rec.47
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4.REPORT Clearly writing in English (simple and easy to understand)
Save to system (NPS)
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Technical Seminar
THANK YOU!THANK YOU!