The Donut Fender is a specific type of Foam Fenders. It is designed to simply slip over a stationary monopile. Due to its construction, the fender floats up and down with the fluctuating water levels and rotates when vessels berth and slide along the fender. The Donut Fender is designed with a 100% closed cell cross-linked polyethylene foam core, a reinforced elastomeric skin and low friction pads at the internal steel core.
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. Additionally, mooring crowns, counterweights (for sub-marine applications) or other features like protective nettings can be added.
The foam hardness, skin thickness, pile/fender diameter and also the height of the fender can be changed on request. ShibataFenderTeam would be pleased to receive your design input allowing us to engineer the correct type, size and overall layout of the Donut Fender.
Proportional load deflection curve
Low shear forces
Self-adjusting to changing water levels
Low installation costs
Generally maintenance free
Individual drafts can be controlled by counterweights
High energy absorption prevents damage to both the fender and moored vessels and makes berthing operations easier and safer.
Quick and easy installation
Manufactured from durable and reliable materials to minimise maintenance costs and maximise performance and lifetime of the fender
The below curve shows the Energy Absorption of the considered HAOHANG Donut Fender under a different % of Compression. Only one side of the Fender is working during compression and not its entire diameter. Performances are usually given up to a compression of 60 % however higher compression is occasionally permissible during short periods of time when accidents occur.
A deflection at and higher than 75 % if applied over hours will reduce the ability of the foam to recover its original shape. It will however continue to insure its securing function. Please note that for such high compressions there is a risk of damaging the internal steel parts of the Donut Fender.
The “Reaction Force” Curve shows the forces generated both on the Vessel hulls and the Steel Monopile during compression of the Donut Fender.
Lock entrance / exit corner fenders
Designed for protecting Harbour entrances like docks, locks or as a guide to ships diverting from their normal paths.
Angled design which presents a softer feel in case of frontal impacts
Longitudinal guide to straighten the Ship in its trajectory avoiding serious damages to hulls and jetty/Quay walls.
Sizes and Shapes are calculated taking into account the Vessel characteristics while reducing the width of the fender to a minimum.
Several fixation methods are available : For instance, the Fender can be glued on a steel plate, bolted on jetty/Quai wall; held by wires or chains and/or strapped.
Attn.Pls We are supplier of Natural Rubber Mat with Tyre Fabrics Raw-Materials for making Airbags.
Application For Donut Fender
Locks and dry dock entrances, corner protection, turning dolphins, areas with large tidal variations or bridge protections
Other monopile structures
Q1. What is your terms of packing?
A: Generally, we pack our goods in inside environmental plastic bags and outside cartons. If you have legally registered patent,
we can pack the goods in your branded boxes after getting your authorization letters.
Q2. What is your terms of payment?
A: usually if the order money less than $1,000, need to pay for full money before producing, if it is more than $1,000, need that T/T 30% as deposit, and 70% before delivery. We’ll show you the photos of the products and packages,enough to keep your products qulity,great thanks! before you pay the balance.
Q3. What is your terms of delivery?
A: EXW, FOB, CFR, CIF, DDU….etc,main according to customer’s requirement,thanks!
Q4. How about your delivery time?
A: Generally, it will take 10 to 20 days after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.
Q5. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.
Q6. What is your sample policy?
A: We can supply free sample if we have ready parts in stock, but the customers need to pay the courier cost.great thanks for your understanding.
Q7. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery,keep the quallity,don’t worry!
Q8: How do you make our business long-term and good relationship?
A:1. We keep good quality and competitive price to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them no matter where they come from.