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NOV ELMAR, a division of National Oilwell Varco UK Limited

Primary frame for Wireline unit

Offshore Containers · Cargo Lashing & Container Equipment

Class-certified type (DNV register) · technical data sheet not yet verified​​⁠‌‍‍​‌‌⁠⁠⁠⁠‌‍‍​‌​​

Primary frame for Wireline unit by NOV ELMAR, a division of National Oilwell Varco UK Limited. DNV TA certificate TAS00003GA.

Inspection

Inspector Detail

Common issues

  • Corrosion at weld seams and base-plate contact points, especially where coating has been damaged during rig-up/rig-down
  • Loosening or fatigue cracking of foundation/securing bolts from vibration during operation
  • Deformation of lifting or securing points from repeated crane handling
  • Coating breakdown exposing structural steel to seawater spray
  • Wear or elongation of pad-eye/shackle attachment holes from repeated lashing loads
  • Damage to structural members from mishandling during mobilisation or demobilisation

Inspection checklist

  • Visual inspection of all welds for cracking, especially at load-bearing joints
  • Check foundation/securing bolts for tightness and corrosion; verify torque against the applicable table
  • Inspect lifting points and pad-eyes for wear, deformation, and current load marking/certification
  • Confirm coating condition and touch up as required
  • Verify structural alignment/flatness against the original arrangement where distortion is suspected
  • Check the lashing/securing arrangement against the vessel's cargo securing manual, where applicable
  • Confirm any load test or proof load certificate for the frame's lifting points is still current

Service intervals

Visual structural inspectionat each mobilisation and at least annually while in service
Bolt torque checkat each mobilisation
Coating touch-upas needed based on inspection findings, typically reviewed annually in marine service
Load test/certification renewal of lifting pointsper class/flag requirement or the specific certificate's validity - confirm against that certificate

Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.

Critical spares

  • Securing/foundation bolts and fasteners, grade matched to the original specification
  • Coating/touch-up system matching the original specification
  • Pad-eye/shackle hardware - rated and certified equivalents only
  • Wear pads or skid plates at ground-bearing points, if originally fitted
  • Elastomeric shock/vibration mounts between frame and equipment, if fitted

Safety

  • Structural failure risk if load-bearing welds or bolts are not verified before use
  • Dropped-object risk from a failed lifting point - confirm current load certification before any lift
  • Corrosion pitting and sharp edges during inspection - standard PPE precautions apply

Class survey

As lifting/securing equipment, class will want current certification for load-bearing or lifting points on the frame and evidence of periodic structural inspection; the frame itself is not normally a separately classed item unless part of a certified lifting appliance.

Classification

DNV type approval

Listed in the DNV Approval Finder at the time we recorded it. The certificate is issued by DNV, not by us; check its current status at DNV.

CertificateTAS00003GA
Open the certificate at DNV
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