With the cost of leaking hatches to life, vessel and cargo detrimental, the need for servicing of the hatch covers is clear. High pressure watertight doors are designed for pressures in excess of 100' (30.5m) (this is equivalent to to a pressure of 299 kPa/ or 3 bar). Typical applications include protection for ship power plants, high-pressure chambers, hydro-electric plants and diving/decompression chambers which are often found on oil platforms and support vessels. In these sensitive areas a small 1m2 watertight door is often expected to be able to resist the weight of 30 tonnes of water without buckling or allowing the protected compartment to flood, and as such the requirement for frequent and accurate preventative maintenance on these seals cannot be overstated. Watertight doors are critical to preserving the separation of watertight compartments so flooding can be contained to a local area. Manufacturers of watertight doors often have their own tolerances which allow a certain amount of water to flow through a door per minute at a certain pressure.
The regulations fully state the need to ensue watertight integrity, with periodic inspections required by SOLAS.
SOLAS Reg II-1/13-1.1 – Openings in Watertight Bulkheads and Internal Decks in Cargo Ships
Where penetrations of watertight bulkheads and internal decks are necessary for access, piping, ventilation, electrical cables, etc., arrangements are to be made to maintain the watertight integrity.
Different models of equipment vary, but in general UT equipment consists of two main units; a generator and a receiver. The generator produces an ultrasonic modulated tone, usually at a round 40kHz which is positioned on one side of the seal. The receiver is then used by the operator from the far side of the closed seal. If at any point the seal is imperfect, the ultrasonic signal will be able to pass though the seal through the leak, which can then be detected by the receiver. Some models of ultrasonic watertight integrity testers are capable of detecting leak apertures as small as 0.06±0.02mm in size. UT seals can provide the sensitivity to detect the smallest leaks, and are often displayed in two different types of readout scale: linear and decibel. The linear scale provides an intuitive measurement of the leak size, whereas the decibel scale allows for comparison of standards set by international classification societies.
The Portascanner® Watertight is basically multiple cable transit areas testing device,which is highly efficient in performing its respective job.
Bulk Carrier Hatches with Hatch Cover Tester
The Portascanner® Watertight is used onboard bulk carriers for inspecting the Watertight or Weather tight hatches for leak sites. The magnetic generator can be positioned just inside the hold, on the hatch combing, removing the need to climb down to position the generator at the bottom of the hold on the tank top.
This hatch cover tester is used by the crew for regular maintenance to dramatically reduce the risk of cargo damage from water ingress, and by Marine surveyors for carrying out P&I, Classification Society or Insurance surveys.
strong>Multiple Cable Transits (MCTs) with Hatch Cover Tester
Cable Transit Seals provide a key element in maintaining the integrity of bulkheads and watertight seals onboard Naval, Offshore Oil & Gas and Marine assets. As one of the most neglected areas onboard, having the means to quickly identify the exact location and severity of issues in MCTs can dramatically assist Contractors and Fleet Operators to enhance the flood, fire & smoke protection that a correctly installed MCT seal provides.
Watertight Doors with Hatch Cover Tester
Watertight Doors on offshore Oil & Gas Rigs, Naval and Marine Vessels are regularly inspected & maintained to ensure the integrity of the Bulkheads and watertight barriers are secure. If these areas are neglected, there can be drastic impacts on flood prevention in the event of a major incident, which is exactly what the Portascanner helps to avoid.
Removing old fashioned and inaccurate chalk testing, the Portascanner Technology provides a very quick and accurate method to identify problem areas and fix the issues that exist within these seals.