The Donut Fender is a specific type of foam fender. It is designed to simply slip over a stationary monopile and float freely around a pile. This allows the donut fender to maintain the same attitude in the water even where extreme tidal fluctuations occur. So Donut Fenders are an effective solution for simple berthing dolphins, guiding and turning structures.
Due to its construction, the fender floats up and down a single tubular pile with fluctuating water levels and freely rotates to help align or redirect ships when vessels berth and slide along the fender. Used as a turning dolphin, donut fenders can help ‘guide’ vessels in difficult berthing situations by rotating while under compression.
The Donut Fender is designed with a 100% closed-cell cross-linked foam core. The foam is unsinkable and cannot burst or deflate. The internal steel core of the donut fender is lined with long-lasting, low-friction UHWM bearing pads which need minimal maintenance. It facilitates the rotation of the donut fender around the pile. The Donut Fender skin is durable polyurethane elastomer reinforced with continuous nylon filaments.
Our Donut Fenders are custom designed for every application. The common Donut Fenders are available in diameters from 1,270 mm to 4,220 mm and a maximum pile diameter of 610 mm to 2,388 mm. The donut foam hardness, skin thickness, pile/fender diameter, and also height of the fender can be changed on request.
Note: Performances are based on standard-grade foam. Other grades are also available. Non-standard sizes are available on request. The performance is based on H=1000m or 1 foot at 60% compression.
Donut Outer Dia (mm) | Donut Outer Dia (ft) | Pile Dia (mm) | Pile Dia (ft) | Energy Absorption (kNm) | Reaction Force (kN) | Energy Absorption (ft-kip) | Reaction Fore (kip) |
|---|---|---|---|---|---|---|---|
1270 | 4.2 | 610 | 2.0 | 7.2 | 116 | 1.6 | 7.9 |
1450 | 4.8 | 710 | 2.3 | 9.2 | 131 | 2.1 | 9.0 |
1520 | 5.0 | 762 | 2.5 | 10.5 | 140 | 2.4 | 9.6 |
1780 | 5.8 | 914 | 3.0 | 14.1 | 162 | 3.2 | 11.2 |
1910 | 6.3 | 995 | 3.3 | 16.4 | 175 | 3.7 | 12.0 |
2030 | 6.7 | 1067 | 3.5 | 18.6 | 186 | 4.2 | 12.8 |
2210 | 7.3 | 1185 | 3.9 | 22.3 | 204 | 5.0 | 14.0 |
2290 | 7.5 | 1219 | 4.0 | 23.6 | 210 | 5.3 | 14.4 |
2490 | 8.2 | 1345 | 4.4 | 28.0 | 229 | 6.3 | 15.7 |
2540 | 8.3 | 1372 | 4.5 | 29.3 | 234 | 6.6 | 16.0 |
2790 | 9.2 | 1524 | 5.0 | 35.3 | 256 | 7.9 | 17.6 |
2970 | 9.8 | 1636 | 5.4 | 40.1 | 273 | 9.0 | 18.7 |
3050 | 10.0 | 1676 | 5.5 | 42.1 | 280 | 9.5 | 19.2 |
3300 | 10.8 | 1829 | 6.0 | 49.5 | 304 | 11.1 | 20.8 |
3450 | 11.3 | 1933 | 6.3 | 54.6 | 319 | 12.3 | 21.9 |
3530 | 11.6 | 1981 | 6.5 | 57.2 | 327 | 12.9 | 224 |
3810 | 12.5 | 2134 | 7.0 | 65.9 | 350 | 14.8 | 24.0 |
3960 | 13.0 | 2241 | 7.4 | 72.1 | 366 | 16.2 | 25.1 |
4060 | 13.3 | 2286 | 7.5 | 75.1 | 374 | 16.9 | 25.6 |
4220 | 13.8 | 2388 | 7.8 | 81.3 | 389 | 18.3 | 26.7 |
Welcome you contact us to get more information. We will provide more information about foam filled marine fenders, shipboard foam fenders, workable fenders.
Telephone: +86-532-67730629
Mobile: +86-186 6025 7896 (WhatsApp)
Email: sales@doowinmarine.com
Address: Xiazhuang, Chengyang, Qingdao, China
Telephone: +86-532-8778 8178
Mobile: +86-186 6025 7896 (WhatsApp)
Email: sales@doowinmarine.com
© 2011~2023 Doowin Marine – Qingdao Doowin Marine Engineering Co., Ltd
It’s easy: all we need is your eternal love. But we’ll settle for your email.
Email: sales@doowinmarine.com
Mobile: +86-186 6025 7896 (WhatsaApp)
Telephone: +86-532-87788178
We will contact you within 1 working day.
