Testing & Maintenance of Hatch Covers & Doors: Best Practice Guidance

Coltraco Commitment To :

  • Through-life maintenance support
  • We still maintain units built 20 years ago
  • Extend trade-in credits - replace old units for new
  • UL listing & ABS type approval - Portalevel™ MAX
  • ABS type approval & RINA approval - Portascanner™
  • Be a life-safety technology partner – Permalevel™
  • Certified OEM calibration & ODA service stations

Coltraco manufacture Ultrasonics That Work

Testing & Maintenance of Hatch Covers & Doors: Best Practice Guidance

Failure of the hatch-covers can cause damage to the cargo, loss of vessel stability and ultimately, loss of the vessel. Hatches must meet the SOLAS Convention, the Load Line Convention, classification society rules and IMO and ILO Guidelines. Watertight (WT) hatch covers prevent water ingress and cargo damage, preventing the possible loss of stability. Watertight integrity can also prevent seawater spray, which combined with air, may cause significant corrosion of the vessel structure and consequentially a reduction in strength. Therefore, hatches are fitted to ships to maintain watertight integrity and protect the crew, ship and cargo. In the forward 25% of the vessel, watertight integrity is particularly important as this is where sea loads are at their highest.

Most classification societies and P&I Clubs now recommend ultrasound which can be done in any weather states and when the ship is loaded. For example, UK P&I Club, Loss Prevention Department published updated information from the Carefully to Carry Commitment in 2002 about “testing weather-tight integrity of dry cargo vessels’ hatchcovers” identifying the ultrasonic test as best practice. IACS requires anyone carrying out a survey to be qualified but unlike most manufacturers, Coltraco manufactures Portascanner® WATERTIGHT, whose readings cannot include ambient noise. It is always recommended to conduct one test when the hold is empty and another when loading is completed, as this can reveal leaks caused by hogging or sagging. Ultrasonic leak detectors must be class type approved

Receiver of PortascannerÒ WATERTIGHT

It consists of extension rod connector, Gain 1,2,3, Volume Up and Down Buttons, LCD Visual Display, Mode, On and Off Buttons and Headphone Connection. Following is the way of operation of receiver:

  • It possesses audio and visual outputs.
  • As sensor rod is attached to it, a user can scan the seal at close range entirely.
  • LCD screen shows the visual output of detected ultrasounds.
  • The visual data received can be converted to decibels (dB) reading which is perfect to be tested to certification society standards.
  • Bar graph representation is also available.
  • With standard jack of 3.5 mm, a headphone is attached to the receiver to receive audio signals.
  • Heterodyning is the process through which receiver converts the ultrasound waves into audio signals so that user can easily hear.

Generator of Portascanner Watertight

It consists of Power On and Off Buttons, Transducers, Low Battery Indication and Battery Compartment. The operation of generator of this cable transit watertight areas testing are mentioned below:

  • It is placed on one side of the sealed compartment and turned on.
  • Sensor rod is utilized to scan the seal by user standing on the other side of the compartment
  • Increased signal strength will be shown apparently for leak sites.
  • The numerical display and volume of audible signals can easily show the strength of the signals received by the receiver.

For further information, download PDF File


CEO Message

Integrity and Science Key to Our Culture of Performance

Dear Coltraco Customers, Strategic Partners and Distributors,

Integrity is our defining value. Performance is its consequence. We understand that our customers have choices, and how we perform determines whether customers choose us. Coltraco’s Code of Ethics does not merely require compliance with laws. It embodies a Commitment to positive behaviours that build trust, promote respect, operate with distinction, with courtesy and global levels of performance, demonstrating our integrity and delivering customer performance.

We honour our commitments, communicate transparently, and act with honour. Ethics are the foundation of our performance culture and our science-based approach. We lead in specific technologies delivering the watertight integrity monitoring of marine structures and the monitoring of fixed liquefied gaseous fire extinguishing systems and the room integrity of protected space to ensure agent hold-times post-installation. We show this by our understanding of the science in them and the mathematics that explain them.

I would like to thank you for your business and for the relationships with our Customers, Strategic Partners, Distributors and ODAs who we value so highly.

My kindest regards,

Carl Stephen Patrick Hunter BA(Dunelm) Hon DSc FRINA FIMarEST MRAeS
CEO & Managing Director
Coltraco Ultrasonics Limited
46-47 Mount Street, Mayfair, London W1K 2SA
United Kingdom

Tel:  +44 20 7629 8475
Fax: +44 20 7629 8477

Call Now : +44 207 629 8475


References in PDF Format


Underwriters LaboratoriesUnderwriters Laboratories


Reference Alpha Fire UK Portalevel MAX Sept 2012

Reference Portascanner-II CSD MOD Albion and Bulwark





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