Anchor Chain Product Tech News

Stud link vs studless anchor chain: working load differs by 1.5x. Compare AM2 vs AM3, selection tips, and why Norway and Chile choose differently. SMEOCEAN.

This is the second article in our Marine Delta Plate series. In the first article, "5 Questions to Confirm Before Ordering Marine Delta Plate," we covered the key parameters to confirm before placing an order — including the two manufacturing options: forged and plate-cut. In this article, we go deeper: What exactly is the difference between these two methods? If you've already determined the SWL and class society requirements but are still unsure which process or material to choose, this guide will help you decide.

A Marine Delta Plate (also called Triangle Plate) is a critical connecting component in towing and mooring systems, linking the main towline to the bridle chains. If the specifications aren't confirmed before ordering, you might end up with parts that don't fit or lack the required strength — and the rework cost can far exceed the price of the plate itself.

If you work with anchor chains, you‘ve probably noticed that Kenter shackles are everywhere, while D-type joining shackles are increasingly rare. Modern vessels overwhelmingly use Kenter shackles as the standard for connecting chain sections. But why did this shift happen? The answer comes down to one fundamental issue: the D-type joining shackle cannot pass through the windlass gypsy wheel.

If you work with anchor chains, you know that every component must be precise. End shackles (ES) and joining shackles (JS) are two of the most easily confused components. They look similar but serve completely different purposes and are not interchangeable.

In anchor chain systems, the Marine Swivel Forerunner (also known as a Swivel Group) is a crucial component connecting the anchor and anchor chain. At SMEOCEAN, we specialize in supplying high-quality swivel forerunners for marine and offshore applications. As discussed in our previous article, this design with special swivels effectively prevents excessive twisting of the anchor chain, improving operational smoothness.

A forelock shackle is a specific type ofshackle designed for use within stud link anchor chains. These anchor chains are distinguished by their studs—raised sections along the links that help maintain the chain's shape and reduce wear during use. The forelock shackle serves as a reliable means of connecting the stud link anchor chain to various fittings, such as deck fittings on ships, termination points on marine structures, or within navigation buoy mooring bridle systems.

DIN 763 is a German industrial standard that specifies round steel link chains with a long link design. The key feature is that the inner length (a) is significantly larger than the inner width (b) – typically 3 times or more. This gives the chain a stretched appearance, making it easy to hook, loop, or wrap around objects.

This article mainly introduces a real order for CM690-76mm stud anchor chains from Canada, specifically designed for offshore operations and ABS-certified vessels, and details the ABS-certified manufacturing process.