Maintaining the watertight integrity of hatch covers, multiple cable transits (MCTs), and watertight doors is crucial for the safety and efficiency of marine structures. We explore the conventional methods of assessing watertight seals, specifically the Hose Test and Chalk Test. We will then compare them to the state-of-the-art ultrasound testing provided by the Portascanner® WATERTIGHT PLUS, a world-leading ultrasonic hatch cover tester.
Conventional Methods: Hose Test & Chalk Test of Hatch Covers, MCTs, and Watertight Doors:
The Hose Test involves spraying high-pressure water onto the hatch covers or doors while visually inspecting for water ingress. Although these methods have been widely used in the past, they have limitations in terms of accuracy, reliability, and practicality. The Hose Test requires time-consuming preparations and may pose safety risks due to the use of high-pressure water. Similarly, the Chalk Test, which relies on observing chalk smudging caused by water ingress, lacks accuracy and consistency, making it less suitable for critical applications.
in pic: Chalk Test being performed on board
in pic: Hose Test being performed on board
Hose Test:
The Hose Test is a commonly employed method for assessing the watertight integrity of hatch covers, MCTs, and watertight doors. It involves directing a high-pressure water spray onto the surfaces of the hatch covers or doors, while an inspector visually inspects for any signs of water ingress. This method relies on the inspector’s observations to determine the effectiveness of the seals.
However, the Hose Test has several drawbacks. Firstly, it requires time-consuming preparations and proper water pressure setup. The visual inspection process can be subjective, leading to inconsistent results. Safety risks may arise due to the high-pressure water spray, potentially endangering personnel and equipment. Due to these limitations, the Hose Test is being replaced by more advanced and accurate methods, such as ultrasonic testing.
Chalk Test:
The Chalk Test is another traditional method used to assess the watertight integrity of hatch covers, MCTs, and watertight doors. It involves applying chalk dust on the sealing surfaces of the hatch covers or doors and then closing them. Any water ingress can be detected by observing chalk smudging caused by the moisture.
However, the Chalk Test has limitations in terms of accuracy and reliability. The visibility of chalk smudging can be affected by various factors, such as environmental conditions and the roughness of the surface. This makes it less suitable for critical applications where precise measurements are required. Moreover, the Chalk Test does not provide quantifiable data, making it challenging to assess the severity of any potential leaks accurately.
in pic: Portascanner® WATERTIGHT PLUS Main Unit and Generator
in pic: Portascanner® WATERTIGHT PLUS in the box
Ultrasound Testing of Hatch Covers, MCTs, and Watertight Doors:
Ultrasonic testing, exemplified by the Portascanner® WATERTIGHT PLUS, offers a superior alternative to conventional methods. This cutting-edge ultrasonic testing equipment is fully ABS Type-Approved and complies with IACS and SOLAS II-1 regulatory requirements. It utilizes ultrasonic technology to provide highly accurate and efficient inspections of hatch covers, ensuring watertight integrity.
Key Features of the Portascanner® WATERTIGHT PLUS:
- User-Friendly: The Portascanner® WATERTIGHT PLUS, an ultrasonic hatch cover tester, provides instant results displayed in decibels (dB) and %OHV, allowing the crew to easily understand and report the findings.
- Versatile & Reliable: With multiple generator options catering to different vessel sizes, from handysize to capesize, this ultrasonic testing equipment offers versatility and reliability for hatch cover tests.
- Multi-Use: In addition to hatch covers, it is also suitable for testing watertight doors and MCTs, making it a comprehensive solution for multiple applications.
- ABS Type Approval: The Portascanner® WATERTIGHT PLUS has undergone rigorous testing and is approved by ABS, ensuring full compliance with classification society requirements.
- Recommended: This ultrasonic testing equipment comes highly recommended by P&I clubs, further attesting to its reliability and effectiveness.
- Made in the UK: Manufactured by Coltraco Ultrasonics, renowned marine regulatory experts, the Portascanner® WATERTIGHT PLUS guarantees quality and expertise.
Benefits and Practicality:
The Portascanner® WATERTIGHT PLUS eliminates the need for time-consuming and expensive training courses. With free training provided, any operator can use the ultrasonic hatch cover tester with minimal instruction. Its handheld design enables easy deployment by the crew on-site, ensuring regular inspections and timely maintenance of the vessel’s hatch covers. The Portascanner® WATERTIGHT PLUS offers unparalleled accuracy, detecting holes as small as 0.06 mm during ultrasonic tests. The instrument’s user-friendly display and intelligent operational modes enhance control and precision during hatch cover testing.
Find out more about Hatch Cover Testing
Conclusion:
In the quest for watertight integrity in marine structures, conventional methods such as the Hose Test and Chalk Test are being surpassed by the advanced ultrasound technology of the Portascanner® WATERTIGHT PLUS. This world-leading ultrasonic hatch cover tester provides accurate and efficient inspections of hatch covers, MCTs, and watertight doors. With its advanced features, user-friendly design, and compliance with regulatory requirements, the Portascanner® WATERTIGHT PLUS ensures watertight integrity and enhances the safety and efficiency of marine operations.
