Watertight hatch cover and watertight doors tightness can be check by chalk method or hose methods.
Chalk test watertight doors.
Chalk is applied evenly around the knife edge coaming compression bars or panel cross seams of doorways.
Periodically perform either a chalk or light test on all watertight doors to ensure that the knife edge makes contact with the entire door gasket.
11 2015 cryptological technician technical 3rd class shannen maxwell from sierra vista arizona uses chalk on a quick acting watertight door to check its watertight integrity aboard uss cole ddg 67 feb.
Chalk and hose tests for seals are time consuming and sometimes completely impractical.
Shipboard machinery equipment and systems requirements for.
All doors and hatches are chalk tested to make sure the dogs are adjusted properly and the frame was not warped in the manufacturing process.
Title 46 title 46 part 163 001 doors watertight sliding and door controls for merchant vessels through the 1991 edition abs standard.
The rubber joints are carefully examined.
Chalk testing is one of the key elements in quality testing at the manufacturing plant.
Chalk testing is used for visual inspection of the compression integrity of doors and hatches on vessels that hold the potential for flooding.
Ensure that all dogs or closing assemblies move freely and close securely.
Iacs states that this test should be followed by a hose test.
Close the door tightly then open.
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Rules for building and classing steel vessels.
A successful chalk test does not guarantee that a closure is watertight but if the gasket is in good condition and the dogs are properly adjusted it does provide a reasonable assurance of watertight integrity.
The chalk test is a simple means of determining if the gasket is in continuous contact with the knife edge when a closure is dogged.
This method was the traditional way for testing hold cover compression but does not test the watertight integrity of the hold.
The chalk must have continuously around the watertight sealing it has water tightness.
If there are irregularities in the chalk markings then it is assumed that these areas are not weather tight.
Check the watertight door sealing.
What is chalk method.
