Sea Technology

JUL 2017

The industry's recognized authority for design, engineering and application of equipment and services in the global ocean community

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Page 18 of 68

18 st / July 2017 Self-Sealing Cable Transit Advantages Major advantages to these new cable transit devices include the abil- ity to significantly reduce both upfront installation costs and the total cost of ownership. Shipyards benefit from the faster installation time compared to conventional cable transits. Once the self-sealing cable transit is installed, there are no additional actions other than running the cables. And since the devices seal automatically, significant time blocks can be reallocated to other construction activities that would ordi- narily be reserved for sealing the cable transits after cable installation. Shipowners and operators benefit long term. Since self-sealing cable transits always remain sealed, there is no risk that they would ever be left unsealed like traditional cable transits, thereby eliminating compliance issues during safety surveys while safeguard- ing passenger safety. The added benefit is that cable changes can be made re- motely by leaving pulling strings inside the cable transits. This can be a major benefit by reducing trips up the lad- der and avoiding damaging overhead ceiling tiles. Cable moves, adds and changes are made quickly and effi- ciently, without the need to reopen transit frames or make new openings in the division during refurbishment. Selecting the Right Environment As advantageous as self-sealing ca- ble transits can be, they are specifically intended for use in nonwatertight divi- sions. Cable penetrations in watertight divisions should still use cable transit products that provide a hermetic seal, such as a traditional block-and-transit frame or a liquid-applied sealant. The self-sealing cable transits provide an excellent air and smoke seal, but it is not a hermetic seal, and, thus, they are not rated for use in water- tight divisions. Nevertheless, in cruise line construction, a great deal of the penetrations will oc- cur in nonwatertight divisions; therefore, shipyards and ship- owners can expect substantial cost and time savings. Self-Sealing Cable Transits Are Here to Stay Shipyards have clamored for a bet- ter way to address cable penetrations in nonwatertight divisions for decades. With the introduction of self-sealing cable transits, such as STI Marine's EZ- Path marine cable transit, the dream is now reality. Certification and classifi- cation societies, including DNV GL, ABS, BV and others, have rigorously examined this new class of products. In fact, IACS published a document in February 2013 identified as FTP6, which included additional provisions for evaluating nontraditional cable transits. Beyond that which is required for the traditional cable transits, self- sealing cable transits have been evalu- ated to the additional testing and de- sign criteria to verify performance. The resulting published type approvals validate conformance to both the IMO FTP as well as the additional criteria imposed by FTP6, assuring ship build- ers and owners of the safety and com- pliance of the devices. As shipyards continue to integrate self-sealing cable transits and owners demand their use, this new class of products is quickly becoming the benchmark for cable penetrations in nonwatertight divi- sions. ST Ruben Wansink is the head of marine sales for Europe for STI Marine, a leading manufacturer of cable transits and penetration sealing systems for use in fire-rated bulkheads and decks. He may be reached at James P. Stahl, CFPS, is the vice president and gen- eral manager of STI Marine. He may be reached at (Top and Bottom) EZ-Path marine ca- ble transit. EZ-Path marine cable transit in bulkhead. UNDERWATER LISTENING SYSTEMS Versatile Acoustic Recorders Real-Time Listening Remote Buoys New Noise Processing Features 25 rue Michel Marion 56850 Caudan - France +33 (0)297 898 580 - International Standard and Guideline Compliant (ANSI, MSFD...)

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