Chalk Test Watertight Doors

The hose test is used in conjunction to determine the weather tightness of doors and hatch covers.

Chalk test watertight doors. Close the door tightly then open check the watertight door sealing. Mil dtl 901 shock test h i. Chalk testing is one of the key elements in quality testing at the manufacturing plant. The international association of classification societies states that a chalk test must be followed by a hose test.

Chalk testing is used for visual inspection of the compression integrity of doors and hatches on vessels that hold the potential for flooding. Title 46 title 46 part 163 001 doors watertight sliding and door controls for merchant vessels through the 1991 edition abs standard. Chalk is applied evenly around the knife edge coaming compression bars or panel cross seams of doorways. The rubber joints are carefully examined.

B the operating gear for operating from above the bulkhead deck any sliding watertight door fitted in the bulkhead of a machinery space shall be. If there are irregularities in the chalk markings then it is assumed that these areas are not weather tight. Chalk and hose tests for seals are time consuming and sometimes completely impractical. Chalk testing chalk powder is applied to the coaming compression bars and panel cross seams the hatches are then closed and re opened.

Testing procedures of watertight compartments. Code of federal regulations cfr standards. Specific test requirements are given in 4 4 and table 1. Shipboard machinery equipment and systems requirements for.

How to perform a chalk test on a wheel operated watertight door and how to adjust door dogs should it fail the test. Rules for building and classing steel vessels. Apply chalk to watertight flat sealing continuously. The spray from a nozzle of 12 mm diameter is sprayed from a distance of 1 to 1 5 m with a water jet pressure of 0 5 ms 1.

The chalk must have continuously around the watertight sealing it has water tightness. 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. How to perform a chalk test on an individually dogged watertight door and how to adjust a dog should it fail the test. 2 a every watertight door of the sliding type shall be capable of being operated by efficient hand operated gear both at the door itself and from an accessible position above the bulkhead deck.

Very important to ensure the door perfo.