A chalk test is a way of verifying that the gasket in a watertight door is evenly contacting the frame which ensures a watertight seal.
Chalk test watertight doors.
Iacs states that this test should be followed by a hose test.
This method was the traditional way for testing hold cover compression but does not test the watertight integrity of the hold.
The rubber joints are carefully examined.
Shipboard machinery equipment and systems requirements for.
Chalk testing is used for visual inspection of the compression integrity of doors and hatches on vessels that hold the potential for flooding.
Code of federal regulations cfr standards.
The chalk must have continuously around the watertight sealing it has water tightness.
Close the door tightly then open.
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.
Chalk testing is one of the key elements in quality testing at the manufacturing plant.
Chalk and hose tests for seals are time consuming and sometimes completely impractical.
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.
Apply chalk to watertight flat sealing continuously.
What is chalk method.
Watertight hatch cover and watertight doors tightness can be check by chalk method or hose methods.
Title 46 title 46 part 163 001 doors watertight sliding and door controls for merchant vessels through the 1991 edition abs standard.
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.
Ensure that all dogs or closing assemblies move freely and close securely.
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If there are irregularities in the chalk markings then it is assumed that these areas are not weather tight.
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.
Rules for building and classing steel vessels.
