Page 66: of Maritime Reporter Magazine (September 1990)
Du Pont 'Kevlar' Mooring
Ropes Perform Like Steel,
Handle Better Than Nylon
Cables and ropes of Du Pont's high-strength "Kevlar" aramid fiber are replacing steel wire for some of the world's toughest mooring jobs.
Five times as strong as steel, pound for pound, rope of Kevlar is only one-sixth the weight of steel at equal diameter, with lower stretch than other synthetic fibers.
Groton Pacific, a firm that man- ages three large oil carriers, has for some time specified Kevlar as a syn- thetic replacement material in mooring tails and ropes on its ves- sels Hawaiian King, Hawaiian Sun and Hawaiian Monarch. "These carriers require extraordi- nary performance and safety char- acteristics from a rope material," said Demetrius Panagopulos, technical director for Groton Pa- cific. "We specified mooring tails of
Kevlar because, relative to polypro- pylene tails, Kevlar has low elonga- • ll
A mooring line of Du Pont Kevlar is easily carried by a single crewman. At one-fifth the weight of steel on land, and one-fifteenth the weight in water, the ropes lessen the number of crew hands needed for docking. tion, is stronger and lighter and is easier to handle," he added.
According to Du Pont, rope main- tenance is another area where Kev- lar outperforms steel. The cost sav- ings is in the hours of maintenance on steel wire that are not necessary with the Kevlar rope.
The designer and maker of the lines for Groton Pacific says that mooring lines and mooring tails for tankers and other ships are ideal uses for ropes made of Kevlar. Such uses take full advantage of the many principal characteristics of Kevlar: high strength, light weight, corro- sion resistance, low stretch, long fa- tigue life, weather resistance, chemi- cal resistance and flexibility.
For free literature giving full in- formation on cables and ropes of Du
Point's high-strength Kevlar,
Circle 56 on Reader Service Card
New Literature Describes
Broco Underwater Cutting
And Welding Systems
Broco, Incorporated, Rialto, Cal- if., is offering a new four-page full- color brochure describing the "Bro- co Underwater" line of underwater cutting and welding equipment.
The new literature fully describes and illustrates the features and ben- efits of the BR-22 Ultrathermic
Cutting Torch and Broco Under- water Ultrathermic Cutting Rods.
Also described are SofTouch Wet
Welding Electrodes and the BR-20
SofTouch welds consistently meet AWS D3.6-83/89, the standard for certifying underwater welds.
The Broco Underwater Ultrather- mic Cutting System enables divers to quickly cut through almost any- thing including cast iron, brass, oth- er ferrous and nonferrous metals and concrete. The Ultrathermic
Cutting Rod will cut through ma- rine growth, rust and mill scale eliminating the need for pre-clean- ing.
According to the company, the unique characteristics of Broco Un- derwater Ultrathermic Cutting Sys- tems and SofTouch Wet Welding
Electrodes provide the fastest, most cost-effective means of completing underwater tasks involving cutting or welding.
For more information and free lit- erature from Broco,
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