Pile Cluster fabrication

In November 2012, Kvaerner Verdal AS awarded Harland and Wolff the contract to fabricate 8 pile clusters, 12 floatation tanks and 108 conductor guides, which are critical sub-assemblies for two massive oil rig jackets.

The 13,400 tonne jacket for Edvard Grieg offshore oil field and the 14,200 jacket for Martin Linge are both installed in the Norwegian sector of the North Sea to support oil rig facilities developed by Lundin and Total.

• Services: Fabrication & Construction
• Client: Kvaerner Verdal AS
• Project: Edvard Grieg / Martin Linge
• Date Commenced: Q3 2012
• Date Delivered: Q1 2014

Work Scope on the Project Included:

• Norsok standard for fabrication, inspection and protective coatings
• Mud mats
• Pile sleeves, complete with grout pipes
• Pile clusters
• Floatation tanks
• Conductor guides
• All NDT, including MPI, UT and radiography
• Pressure testing of the grout pipe and floatation tanks
• Seafastening and load-out

Quality Performance

• Implemented ISO 3834 pt 2: 2005 prior to project start
• High grade weld specification resulted in 19,953 NDT reports
• MPI & UT weld test of 28,853 m resulting in a defect rate of 0.426%

Lessons Learnt

• Better housing keeping improvements
• Purchase of a suite of weld coordination software modules from The Welding Institute
• Increase in Dimensional Control and Planning personnel

HSE Performance

• Integrated safety and environment management team
• Project specific RAMS
• 1 number LTI’s (minor injury)

Lessons Learnt

• Lessons Learnt findings on notice boards for improved communication
• Improved respiratory protection using air-fed welding screens
• ‘Grit in eye’ incident led to change of grinding process and implementation of better PPE
• Improvements to waste management stream