One of the most important regulations to be followed in the construction of bulkheads and watertight doors is that of the SOLAS Convention, and some of the most important are discussed below: Definition of collision bulkhead and definition of freeboard. Class A divisions include all watertight bulkheads. To be considered in this class, they must meet the following criteria: the safety of a ship in damaged condition depends heavily on the strength and integrity of its watertight bulkheads. Many factors come into play when deciding on the position of watertight bulkheads in a ship and their structural design. The collision bulkhead is a heavily reinforced structure, the main purpose of which is to limit the damage of a frontal collision to the part of the bow approaching it. Limiting damage to its front area also means that the collision bulkhead is watertight. It is usually stiffened vertically with sections of edges higher than those of the surrounding structures. It is also stiffened by higher-sweeping triangular spars, called whistling strings. Panting spars are usually provided every 2 meters from the ground, in front of the collision bulkhead.
Collision bulkheads are a type of watertight bulkhead located in the forward part of the ship. This part of the ship is particularly strong because, as the name suggests, it limits the damage caused by complete collisions with other ships or land segments. The anchor is usually located in this part of the ship. Transverse bulkheads divide the ship from side to side and are usually used to create watertight compartments on the ship. In addition, they stiffen the structure of the hull and prevent the stresses of deformation and deposition. If you want to know more about the additional regulations on collision bulkheads, read the video below. The main function of watertight bulkheads is to divide a ship into a series of watertight compartments. Although most watertight bulkheads are transversely aligned, some ships also have impermeable longitudinal bulkheads inside a compartment for a longitudinal compartment in a compartment. In addition to waterproofing, transverse bulkheads also contribute to the transverse strength of the ship. We will discuss this aspect a little later. Corrugated partitions are a kind of corrugated iron partition.
Corrugated cardboard in mechanical engineering is used to naturally add more rigidity to various types of materials, including cardboard and metal. In order to maintain the maximum integrity of the partition, the dimensions of the door are reduced to the strict minimum. In addition, the opening is reinforced by additional metal plates (Double plate), which ensure the maintenance of robustness around the watertight doors. Please correct for Class A. The average temperature on the unexposed side will not exceed 140 ° C of the original temperature, and the temperature at no point, including a seal, will not exceed 180 ° C above the original temperature. 1. Class A bulkheads or decks shall be made of steel or an equivalent metal structure, appropriately stiffened and rendered intact with the main structure of the ship, such as the hull, structural bulkheads and decks. They shall be constructed in such a way that, when subjected to the standard fire test, they are able to prevent the ingress of smoke and flames for 1 hour. In addition, they must be insulated with approved structural insulation, bulkhead panels or deck coverings so that the average temperatures on the unexposed side do not increase by more than 250°F. About the original temperature, the temperature at any given time, including a compound, would not increase by more than 325 ° F. above the original temperature, in the time indicated below: the longitudinal partitions extend forward and backward, dividing the container along its entire length. Engineers use them in lattice partitions to further increase the number of compartments.
This gives the ship even more buoyancy when certain compartments are flooded and isolated. Class A panel: All watertight bulkheads are class A type. Class A bulkheads shall be made of steel or equivalent material and shall meet the standard fire test to prevent the passage of fire or smoke on the intact side for at least one hour. In the case of Class A partitions used, the average temperature on the unaffected side shall not exceed 120 degrees Celsius. In addition, there are three categories of Class A panels, depending on the time until which the temperature should not exceed 160 degrees Celsius at any point of the partition: Watertight doors are usually operated hydraulically or electrically and can be moved horizontally or vertically. The reason why revolving doors are not supplied in watertight bulkheads is that it would be impossible to close a revolving door in the event of flooding. It shall be easy to operate even if the ship is indicated by 15 degrees on both sides, and the control system shall be designed in such a way that the door can be operated both near and far, i.e. from a position above the bulkhead deck. In all vessels, visual displays are provided at the location of the remote control to indicate whether the door is open or closed. (b) The hull, superstructure and deckhouses shall be divided by suitable structural steel or other equivalent metal bulkheads into main vertical zones, the average length of which shall generally not exceed 131 feet on a deck.
As far as possible, the main bulkhead of the vertical area shall be held in a single vertical plane. On ships designed for special purposes, such as: However, ferries for cars or wagons whose installation of such bulkheads would cancel the use for which the ship is intended may be replaced by equivalent means of fighting and limiting a fire if they are expressly authorized by the captain. As the name suggests, watertight bulkheads have one main purpose – to divide the ship into smaller, impermeable compartments. Depending on the size of the ship, they may: (i) If the class B-15 bulkhead plates are to extend beyond the ceiling to the deck above or beyond the lining to the hull, the part of the bulkhead inside the cavity shall meet only the B-0 requirements. (l) Where the cladding or bulkhead panels are framed by the hull or structural bulkheads, the deck inside the cavity thus formed shall comply only with the requirements of Class A-0. To prevent the spread of fire from one compartment to another, all watertight bulkheads are also equipped with a flame retardant coating.