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Coiling and take-up specialist Meltech Engineering has constructed the world's first, in-line, tensioned rope measuring system for Scanrope Subsea AS, the leading manufacturer of offshore mooring rope for tethering oil and gas platforms, at Tonsberg, Norway.
Scanrope Subsea produce the longest, largest, and lightest synthetic mooring lines for deepwater mooring in the industry. As a typical example, Scanrope Subsea can produce 2,000 meters of polyester “MoorLine” rope with 2,000 tonnes MBL in one length and these ropes can be loaded directly on to ocean going vessels from ScanRope’s Tonsberg quay.
 To compliment this capability, Scanrope Subsea has incorporated the Meltech in-line tensioning and measuring system into their production line. This system addresses the concerns of mooring system designers and installation contractors over accurate length measurement. Know as “The Ruler”, the system will maintain a load in the rope of 1% MBL during length measurement, this being the reference load specified by many classification societies and other international standards for rope prototype testing.
 In-line rope tensioning
Rope tensioning is provided by multiwrap twin wheel capstans positioned in-line between the pay-off and the take-up. The pair of capstans operate with one unit 'leading' and one 'trailing' to provide adjustable tensions of up to 25 tonne in the rope to facilitate length measurement 'under tension'. The drive system is capable of continuous stall operation to allow ropes to remain under tension during weekend shutdown.
“The Meltech, in-line, tensioning equipment will make a big difference to the accuracy of the length of our mooring ropes. Meltech Engineering is one of the few companies able to take on this kind of bespoke development and have been a valuable partner in developing and manufacturing the in-line tensioning equipment,” said Tor Ellefsen, engineering manager, Scanrope Subsea AS. For more information call Meltech-Confex on +44 (0)1254 691488 or
e-mail: sales@meltech.co.uk.
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