Renewable Energy
Safer heavy lifting T
wo companies have cooperated to create an industry-first innovation allowing workers safe and efficient access to install the jackets for 84 wind turbines on the Beatrice Offshore Windfarm project in the Outer Moray Firth. Offshore contractor Seaway Heavy
Lifting awarded the EPCI contract to Ampelmann to design and create an angular boom tip. This will allow secure connection at difficult angles for safe gangway transfer between the 5,000 tonne heavy lift vessel (HLV) Oleg Strashnov and the 2,500 tonne HLV Stanislav Yudin to install 84 individual wind turbines. Conventional gangway tips are
rounded so can fit on the majority of offshore wind turbines or offshore assets. However, due to the size of the HLV, its close proximity to the jackets and the location of its access gates, Ampelmann custom-made the V-shaped tip at the end of the 25m gangway to give workers easy access to build and manage each new wind structure.
Friso Talsma at Ampelmann explains: “Though the tip is a quite a straightforward piece of steel, the rubber covered angular shape now allows us to land at difficult angles as small as 45°, while eliminating the risk of gaps between gangway and structure. It’s a new innovation, tailor-made for this particular project and overcomes a significant safety and potentially costly challenge faced by the operators to ensure safe access to the structures.” The design, development and installation of the detachable tip took around two months and is deployed on the Beatrice project using the company’s A-type motion-compensated gangway system, which is able to transfer people with zero movement in significant wave heights of up to 3m.
Talsma adds: “This type of solution can also be adopted by the oil and gas industry in certain situations.” The Beatrice Offshore Windfarm
project is expected to power approximately 450,000 homes - around three times the number of homes in the Moray and Highland regions of Scotland. Offshore construction began in 2017 and is expected to become fully operational in 2019. l
For more information visit
www.ampelmann.de
NEW HYDRAULIC BOLT TENSIONERS for OFFSHORE WINCH The FTE-Series Elliptical Foundation
ydraulic bolting tools specialist Enerpac has introduced a new portfolio of hydraulic bolt tensioners for critical offshore wind power generation fastening applications. The three new bolt tensioner series are designed
H
for maximum durability in harsh environments, ease of use and improved speed of operation. The PGT-Series Double Deck and
Single-Stage bolt tensioners provide high performance in tight spaces typically found in wind turbines. Key features including auto-retract pistons, over-stroke protection and auto-engage nut rundown. The FTR-Series Foundation bolt
Enerpac FTR-Series tensioners for tensioning wind tower foundations bolts
tensioners are designed specifically for tensioning wind tower foundations bolts. They provide the speed and precision required by this critical application. Long stroke models provide greater speed and ease of use by enabling applications to be completed in a single pull.
bolt tensioners provide an ideal fastening solution on wind tower foundation applications where limited space between the stud and wall prevents the use of standard tools. They feature an elliptical geometry that enables fit in narrow access foundation applications without reducing load capabilities. “Enerpac bolt tensioners are used in some of the most demanding industrial environments imaginable. Our offshore wind bolt tensioners combine precision with ruggedness to give installation engineers a reliable and long-lasting bolt tensioning solution,” says the company’s Maarten Franken. l
For more information visit
www.enerpac.com
www.engineerlive.com 41
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