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Scroby Sands Offshore Wind Farm - Rope Access Maintenance

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Scroby Sands Wind Farm is an offshore wind farm located 2.5km off the coast of Great Yarmouth on the Scroby Sands sand bank in the North Sea. Abfad Limited have provided rope access services to the wind farm several times, working on various offshore maintenance and refurbishment projects, utilising Abfad's rope access skills,unique knowledge and abilities.

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Scroby Sands Offshore Wind Farm - Rope Access Maintenance

  1. 1. Scroby Sands Offshore Wind Farm - Rope Access Offshore Maintenance www.abfad.co.uk
  2. 2. Scroby Sands Wind Farm is an offshore wind farm located 2.5km off the coast of Great Yarmouth on the Scroby Sands sandbank in the North Sea. The wind farm itself is owned and operated by E.ON and consists of 30 wind turbine generators each rated at 2MW, along with a metrological mast which lies to the North of the wind farm. www.abfad.co.uk
  3. 3. Abfad Limited have provided rope access services to the wind farm on several big projects. www.abfad.co.uk
  4. 4. Monopile refurbishment of the first commercial wind farm in the UK INDUSTRIAL ROPE ACCESS SPECIALISTS www.abfad.co.uk ABFAD LIMITED
  5. 5. EXISTING CONDITION OF MONOPILE STEEL BEFORE PROJECT COMMENCED, SEVERE CORROSION TO STRUCTURAL BEAMS AND MAIN BODY. www.abfad.co.uk
  6. 6. Having extensive experience in dealing with corrosion and specialist coatings, Abfad Ltd were brought in to refurbish the monopiles steelwork from grating elevation to sea level, using rope access techniques and Abfad's unique Magnet System. Once on the monopile structure the extent of the corrosion could be clearly seen. Blasting to SA2.5 standard was carried out to remove all sections of corrosion and the existing coating was profiled and feathered back and the new protective coating applied by airless spray unit. www.abfad.co.uk
  7. 7. Abfad's patented permanent Magnet System has proven invaluable in areas that can only be accessed by rope but need a reliable method of moving the rope technician closer to the working surface and anchoring them securely to enable them to carry out the required work. Use of this Magnet System provides the user with a productivity advantage, increasing the speed of work, such as blasting, spraying, mechanical surface preparation, welding, drilling, NDT inspections etc. by securing the rope technician to the working substrate and enabling a greater precision of work. ABFAD'S MAGNET SYSTEM www.abfad.co.uk
  8. 8. The work by Abfad was a complete success with all corrosion removed and the new coating applied, ensuring the monopile was left with optimum protection against the elements. The work itself was carried out in two phases to enable complete refurbishment of the monopile. Phase 1 consisted of structural steelwork below the walkway gratings being refurbished. Phase 2 was to refurbish all steelwork below the colalr section to sea elevation. Walkway gratings and davit arms were removed in stages to enable each phase to be succesfully completed before moving onto the next. www.abfad.co.uk
  9. 9. INDUSTRIAL ROPE ACCESS SPECIALISTS www.abfad.co.uk ABFAD LIMITED Major Restoration to Scroby Sands Offshore Met Mast
  10. 10. Scroby Sands Wind Farm Due to corrosion and mechanical damage to access ladders, a tender was awarded to Abfad Ltd by E.ON Climate and Renewables UK Ltd. www.abfad.co.uk
  11. 11. S c r o b y S a n d s M e t M a s t F a b r i c a t e n e w l a d d e r s e c t i o n s a n d e i g h t c l a m p s , r e m o v e e x i s t i n g d a m a g e d l a d d e r s e c t i o n s a n d c l a m p s , b l a s t c l e a n t h e s t r u c t u r e t o S A 2 . 5 s t a n d a r d a n d a p p l y a p r o t e c t i v e c o a t i n g , i n s t a l l n e w c l a m p s a n d t i g h t e n u s i n g H y d r a t i g h t h y d r a u l i c e q u i p m e n t , t h e n i n s t a l l n e w a c c e s s l a d d e r s t o t h e s t r u c t u r e . The Project Details. www.abfad.co.uk
  12. 12. B l a s t i n g C o r r o s i o n t o M a s t S t e m a n d U n d e r s i d e o f w a l k w a y u s i n g A b f a d M a g n e t S y s t e m www.abfad.co.uk
  13. 13. PROTECTIVE COATING Once all blasting was completed, the met mast was spray coated with a protective coating in order to protect it from further corrosion.
  14. 14. Once new ladder and clamp sections were fabricated and coated ready for installation, they were installed using powered (battery) winches to swiftly lift the clamps and ladder sections in to place and hold them steady while they were installed by Abfad personnel using rope access techniques. This was to ensure the support vessel deck was not damaged during the lifting process and sea swells. www.abfad.co.uk
  15. 15. HYDRATIGHT HYDRAULIC TIGHTENING Newly fabricated clamp sections were installed by Abfad personnel using rope access techniques. Trained Abfad technicians then tightened the clamps using Hydratight hydraulic equipment. www.abfad.co.uk
  16. 16. Project Completion To complete the project final inspection and commissioning checks were performed using rope access methods. www.abfad.co.uk
  17. 17. www.abfad.co.uk
  18. 18. NDT NDT inspections on the Met Mast were carried out on another visit at a later date, this included tightening of all bolts on the structure. www.abfad.co.uk
  19. 19. INDUSTRIAL ROPE ACCESS SPECIALISTS www.abfad.co.uk ABFAD LIMITED Offshore Met Mast Removal at Scroby Sands
  20. 20. SCROBY SANDS OFFSHORE WIND FARM R E M O V A L O F L A T T I C E T O W E R S E C T I O N O F M E T M A S T www.abfad.co.uk
  21. 21. MET MAST LATTICE TOWER REMOVAL In 2015 E.ON wanted the lattice tower structure of the Met Mast removed. Having over 20 years experience of onshore and offshore rope access Abfad were the ideal candidates to undertake such a task. www.abfad.co.uk
  22. 22. Removal Using Rope Access The lattice tower is constructed in two distinct sections, with the upper part making up about 40% of the tower and consisting of both flanged and bolted vertical sections with welded diagonal tubular bars. www.abfad.co.uk
  23. 23. The lower section of the lattice tower is made up of both vertical and diagonal struts which are fully bolted. www.abfad.co.uk
  24. 24. REDUNDANT ANEMOMETRY DEVICES WERE ALSO PRESENT AT THE TOP OF THE MAST, THESE WERE ALREADY DISCONNECTED FROM ANY SOURCE OF POWER
  25. 25. The lattice tower needed to be removed in manageable sections, along with any instrumentation. Abfad used rope access techniques to rig up a pulley system which would safely and securely lower the cut steel sections onto the walkway and then onto a service vessel for disposal. www.abfad.co.uk
  26. 26. PROJECT COMPLETE All sections of the Met Mast Lattice tower were cut and removed by Abfad's trained rope access technicians, lowered using a rope access pulley system and taken away and disposed of by E.ON. The job was a complete success and accomplished well within schedule. www.abfad.co.uk
  27. 27. Abfad Limited have been established since 1996 and provide IRATA approved rope access services, both onshore and offshore. www.abfad.co.uk info@abfad.co.uk

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