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Diamond wire cutting - Snorre A

Diamond wire cutting - Snorre A

Project: Dismantling of degasser tank, May 2011.
Installation: Snorre A, Norwegian Continental Shelf.
Scope: Dismantling of degasser tank: d2.3 m, length 6 m, wall thickness 17 mm. Contents comprising 770 titanium pipes. Total weight 11,500 kg.

Challenges:
Large built-in tank surrounded by pipe trenches, cable trenches and various equipment.  Not possible to remove in one piece. Opening to loading site: 1 x 2.5 m. The tank has to be cut into some 20 pieces for removal. Using a Tigair saw would be very time-consuming, and the operators would be exposed to significant vibrations and noise.

Solution:
Equipment/method: Large diamond wire saw (hydraulic). 4-man team with rigging and cold cutting expertise. The weight of each piece must be under 2 tonnes and can then be lowered using pulleys and removed using a pallet jack. The operators planned and completed the assignment from start to finish without involving other disciplines.

Benefits:
Using diamond wire for cutting is ideal on larger constructions. The contents are cut during a single operation along with the outer shell of the tank. The machine is remotely operated, and the operators can remain at a safe distance from rotating tools, noise and vibrations. Good HSE factors and ergonomics.

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