Checking of hatches

Sealing and unsealing of hatches:

For the carriage of some cargoes hatches need to be sealed. We can take care of the sealing and after sealing of all hold entrances we will issue a certificate with all seal numbers.

After arrival at the discharge port of a vessel with sealed holds these seals will need to be removed, after verifying if all seals are still in place with the correct numbers according to the certificate issued in the load port. For this service we’re also available 24/7.

 

Checking for watertightness

Hose and Chalk test:

This survey is carried out by 2 surveyors.

When performing a chalk test, the top edge of every compression bar is covered with chalk. Hatches are then fully closed and reopened. The rubber packing is examined for a chalk mark, which should run continuously along the packing’s center. Gaps in the chalk mark indicate lack of compression. Chalk testing merely indicates if hatch panels are aligned and compression achieved. It will not show whether compression is adequate and therefore it is not a test for weather tightness.

When performing a hose test water under pressure is applied to the hatch joints. One surveyor will be inside the cargo hold to check for water ingress.

Ultrasonic testing:

The test involves placing (with hatches closed and secure) an electronic signal generator inside the cargo hold. A sensor is then passed around the outside of all compression joints. Readings taken by the sensor indicate points of low compression or potential points of leakage. Ultrasonic testing overcomes the majority of limitations associated with hose testing and can be carried out when holds are loaded.

We are fully trained to perform this survey. If you are interested, pls contact us well in advance.