Section 5 Inspection and testing
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Offshore Units, July 2022 - Part 5 Main and Auxiliary Machinery - Chapter 23 Jacking Gear Machinery - Section 5 Inspection and testing

Section 5 Inspection and testing

Parent topic: Chapter 23 Jacking Gear Machinery

5.1 At jacking machinery manufacturers’ works

5.1.1 The complete, assembled, jacking gear unit is to be subjected to a partial load running test with the first assembly for each new building tested to the maximum design jacking load (a minimum of one complete revolution of the main pinion) and the maximum static pre-load holding.

5.1.2 Upon satisfactory testing of the first jacking gear unit, the assembly is to be disassembled for inspection of all main components.

5.2 At the offshore unit construction site

5.2.1 Inspection and testing during construction and assembly is to be carried out to a plan/schedule acceptable to LR, but is to include the following:

  1. Jacking trials to verify satisfactory operation of the jacking machinery at all design jacking and holding load conditions.
  2. Jacking of hull/legs to the full extent of design travel to demonstrate satisfactory alignment of leg, racks, pinions and guides.
  3. Operation of the fixation system at various positions of leg/hull travel.
  4. Operation of the braking devices at the maximum design load to verify effective holding without slippage.
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