ドーナツ・フェンダー・メーカー

Donut fenders are commonly used in monopile docks, transshipment platforms, or scenarios where the ship’s hull needs to float with tides. Because it fits over a pile, it is more common in areas with large water level fluctuations.

When undertaking such projects, Jerryborg Marine typically confirms the pile diameter and tidal range before determining the fender specifications to avoid problems such as jamming or excessive gaps.

If the inner hole size is designed properly, it will not normally get stuck. A suitable gap needs to be maintained between the inner wall of the fender and the steel pile, and the surface must be relatively flat.

Jerryborg Marine will confirm the pile diameter data provided by the customer before production and allow reasonable tolerances to ensure the fender remains stable when bobbing up and down.

A Donut Fender is a structure fixed to the pile and is mainly suitable for single-point berthing. Regular inflatable fenders are mostly used for berthing between ships or at docks and need to be suspended or fixed to the outside of the structure.

Jerryborg Marine produces various types of fenders. If customers are unsure which type to use, we can also provide suggestions based on the actual berthing method.

Some wear is inevitable over time, especially around the area in contact with the steel pile; this is normal. With frequent use, this area will show more noticeable wear.

Jerryborg Marine makes this area more durable, ensuring it remains stable even under long-term use.

When installing this type of fender, the position must be aligned correctly beforehand, especially when fitting it onto the piling. Make sure it’s inserted smoothly, otherwise it might feel awkward. Also, the gap between the inner hole and the piling shouldn’t be too tight, otherwise it will be difficult to move smoothly later.

Jerryborg Marine usually confirms the dimensions before shipping to avoid on-site adjustments. In actual installation, as long as the dimensions are correct beforehand, the installation isn’t particularly complicated.

Under normal use, there won’t be an obvious deformation. More commonly, there will be gradual wear and tear on the surface. If there is sustained concentrated stress at a single location, there may be slight changes in a localized area, but the overall impact will be minimal.

Jerryborg Marine improves the stability of the rubber layer during product manufacturing, aiming to maintain its original state after repeated use and to prevent significant deformation over time.