What are the components of ship anchor chains?

Marine anchor chain is an important component of ship equipment, which is a specialized chain that connects the anchor and the hull and transmits the anchor gripping force. It is often composed of anchor end links, middle links, and end links. According to the structure of the chain link, it can be divided into two types: with and without gears, with the former having greater strength than the latter; According to the manufacturing method, it can be divided into cast steel and electric welding, etc. The length of ship anchor chains is measured in sections, with a standard length of 27.5m per section. The internodes are connected by connecting links or connecting shackles. Usually, the main anchor on each side of a 10000 ton ship is equipped with a chain length of about 12 knots.

Anchor chains for welding ships

At present, anchor chains for welding ships have been widely used on commercial ships. Almost all are manufactured using flash welding method, with less use of casting. Except for the attachments which are mostly forged parts, forging has been basically eliminated.

Used for producing graded steel, electric welding is divided into three grades M1, M2, and M3, and cast steel is divided into two grades M2 and M3. Adding A (such as AM2) before the corresponding code indicates the presence of a gear chain, while B indicates the absence of a gear chain (with two levels of BM1 and BM2). The higher the grade of steel, the greater the tensile strength. AM1 grade is quenched steel, while AM2 and AM3 grades are fully quenched fine grain treated steel. For the same vessel, if high-strength steel is used, the chain link size can be appropriately reduced. The size of ship anchor chains needs to be appropriately selected according to the vessel.

Of course, there are also higher-level R4 grade ship anchor chains, but currently there is still Asia Star Ship Anchor Chain Factory that can manufacture them.

The meaning of ship anchor chains

1、 The meaning of anchor: Anchor refers to a device that is installed on both sides of the bow of the ship (some are also installed at the stern) and can catch the bottom after being thrown into the water, and can anchor the ship or other floating body in a certain water area through ship anchor chains or cables.

2、 The main function of an anchor is that it is made of cast steel or forged steel and has a specific shape. An anchor is mainly composed of an anchor shackle (or anchor ring), an anchor shaft, an anchor head, an anchor arm, and an anchor claw. The types of anchors include Hall anchors (also known as Shanzi anchors), Navy anchors, Danforth style anchors, etc. Anchors must be inspected and approved by the department before they can be used. The function of anchor is an important ship accessory for anchoring and mooring.

3、 The meaning and structural characteristics of ship anchor chain. Ship anchor cable refers to the chain used to connect the anchor and the hull. Connected by many chain links, the size is represented by the chain diameter of approximately (millimeters). According to whether there is a support bracket in the middle of the chain link, it can be divided into anchor keys with brackets and anchor chains for ships without brackets. Marine anchor chains can be made by forging, casting, and welding methods. Marine anchor chains are composed of several 'shackles', each section is 25.0-27.5 meters long, and the sections are connected by chain links or shackles. After hoisting the anchor, the ship's anchor chain is stored in the ship's anchor chain compartment at the bow of the ship. The specifications of ship anchor chains shall be calculated and determined in accordance with the ship construction specifications.

4、 The main content of anchor equipment is equipment of anchor, which refers to the general term for anchors, ship anchor chains, windlass machines, ship anchor chain cabins, and ancillary equipment. It consists of anchors, ship anchor chains, ship anchor chain tubes, chain brakes, windlass or winch, ship anchor chain tubes, ship anchor chain compartments, etc. Ships rely on the gripping force of anchors and the weight of ship anchor chains to withstand the forces of wind and waves, ensuring the safety of ship anchoring. Anchor equipment can also assist in ship maneuvering, such as docking, turning, collision avoidance, and shallowing, which are often used to complete operational tasks.

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