Cable and pipe transit specialist Roxtec has developed a new nonweld cable and pipe transit frame for the marine industry. These are suitable for new build and refit in marine vessels and offshore platforms and are fully tested and certified. The GHM frame avoids expensive welding, speeds installation and reduces possible hazards. Units are ideal for routing telemetry, power, hydraulics and other services, the UK-based company says. Traditional marine cable transit frames have always been installed by welding to the bulkhead or deck, a time consuming process due for the need to weld in stages and allow for cooling to avoid frame distortion. Roxtec claims that welding can also pose risks as it entails hot work would create safety hazards in areas subject to explosive gasses or materials. Installing and sealing of the GHM frame is entirely mechanical. The frame has a generous 60mm flange allowing round cornered holes to be cut to minimise possibilities of bulkhead cracks. The flange is either bolted or self tapped into the bulkhead and sealed by a concealed gasket. Much lighter than welded frames the GHM also helps to reduce the weight of the vessel. The ease and speed with which the GHM frames can be installed allows them to be fitted or modified while the vessel is at sea or a rig is under operation, according to Roxtec. They are fully compatible with preterminated connectors and where this is desirable the whole assembly could be prewired and offered up to the bulkhead as a complete assembly. All Roxtec transit systems are based on MultiDiameter Technology which enables any diameter of cable or pipe, within the module's capacity, to be easily secured by the removal of the core and the right number of layers within the module. Each module ensures an adequate separation between services, but still enable a large number of cable or pipes to pass through a compact enclosure. The format of modules within the frame can be varied to suit client needs, says Roxtec. Unused modules can be left in the frame for future cable expansion. A compression module within the frame ensures perfect sealing and allows frames to be decompressed when the services passing through the frame are modified. The GHM frame has a 60 minute fire rating and has been tested and certified for use in A60 class bulkheads. Frames have also been pressure tested to 3.33 bar water pressure and a gas pressure of 1.67 bar. While developed with conventional steel vessels in mind, the GHM is also suited to applications in aluminium and GRP craft. Frames are available in a range of sizes from 233mm square to 986mm x 990mm.