Hull Steel Wastage, UT Thickness, Renewal Tonnage & Drydock Repair Cost Tool
2011 ESP Code • IACS UR Z10 Survey Logic • Renewal Thickness • UT Trend • Corrosion Margin • Steel Tonnage • Repair Scope • Drydock Cost
Hull Steel Wastage, UT Thickness, Renewal Tonnage & Drydock Repair Cost Tool
Turn ultrasonic thickness readings into a practical structural-repair screen. Compare measured steel with the approved renewal thickness, trend corrosion from previous UT data, estimate crop-and-renew steel weight, and use Advanced to build a location-by-location drydock repair scope, cost and schedule.
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Need much more depth? Click Advanced above.Advanced adds multiple UT locations, non-CSR vs CSR substantial-corrosion logic, pitting/grooving flags, steel/stiffener/weld quantities, scope growth, NDT, coating, access, drydock schedule and full repair-cost build-up.Fast10 primary inputs
Core answerRenewal status + UT trend
CommercialSteel weight + direct repair budget
Representative Hull Member
Enter the actual approved renewal thickness for this member. Do not substitute a generic percentage wastage limit.
mm.
mm. Use the controlling relevant reading.
mm. Vessel/member-specific tren.
mm at the same/comparable point.
years.
m².
mm, subject to approved repair drawing.
selected currency per installed tonne. Include steel/fabrication/labor as appropriate to your quote.
selected currency.
selected currency, if any.
Vessel, Survey & Acceptance Basis
% of allowable wastage margin consumed. Owner planning only.
years.
t/m³.
Acceptance hierarchy: current minimum thickness at or below the entered renewal thickness is treated as a renewal flag. Non-CSR substantial corrosion uses more than 75% of allowable wastage consumed while still within acceptable limits. CSR substantial corrosion uses the measured-thickness band from tren to tren + 0.5 mm. Pitting/grooving may require separate class assessment and can never be cleared by a simple average-thickness pass.
Advanced UT & Renewal Register
Each row is screened independently. Location names remain on screen only and are not sent through Tool Data.
| Location | Member | Orig mm | Prev mm | Years | Current min | t-ren | Pattern | Pit % | Crop m² | Repl mm | Stiff m | kg/m | Weld m | UT pts |
|---|
Steel Quantity & Scope Growth
% of presently identified installed renewal tonnage.
% above expected installed steel weight.
1.00 = base quote.
2.0 approximates both sides of plate.
Yard Cost Inputs
selected currency/t procured/fabricated basis.
selected currency/labor-hour.
labor-hours per installed tonne before complexity.
Access, curvature, confined spaces, overhead welding, staging.
selected currency/m weld.
% of direct steel labor cost.
selected currency/m² coated surface.
selected currency/m² crop area.
% after repair package and incremental dock exposure.
Drydock Schedule & Exposure
t/day on critical repair path.
days.
days.
days.
% of NDT/coating tail overlapped.
days.
selected currency/incremental day.
Survey / Repair Readiness
Structural limitation: this is a survey, repair-scope and drydock-budget screening tool. It does not determine statutory/class scantlings, hull-girder section modulus, buckling capacity, fatigue strength, crack acceptability, insert geometry, local structural adequacy, pitting/grooving acceptance or temporary-repair approval. The attending class surveyor and approved vessel structural documentation control renewal and repair detail.