Qingdao Luhang Marine Airbag and Fender Co., Ltd
| Name | Floating and Rotation Foam Donut Fender on Mono Pile |
| Application | Corner Protection, Breasting Dolphins |
| Feature | Low Shear Force |
| Size | Customized |
| Material | EVA foam and SPUA coating |
| Service Life | 10-20 Years |
| Brand Name | Luhang |
| Model Number | LHDF |
| Certification | CCS/BV/SGS/ISO |
| Place of Origin | China |
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Product Specification
| Name | Floating and Rotation Foam Donut Fender on Mono Pile | Application | Corner Protection, Breasting Dolphins |
| Feature | Low Shear Force | Size | Customized |
| Material | EVA foam and SPUA coating | Service Life | 10-20 Years |
| Brand Name | Luhang | Model Number | LHDF |
| Certification | CCS/BV/SGS/ISO | Place of Origin | China |
| High Light | dock bumper fender ，cylindrical rotational fender | ||
2.2m Dia 3M Height Low Reaction Floating and Rotation Foam Donut Fender on Mono Pile
Donut fenders are designed to float up and down with the tide on a circular mono-pile either driven into the bed or mounted on the face of a quay wall. Donut fenders are suited for lock entrances, turning structures, approach channels and breasting dolphins. Not only do Donut fenders rise and fall with the tide but due to the low friction guides located inside the fender they also rotate around the pile assisting in lining up vessels for mooring or guiding though a channel.
Structure and Constrution of Foam Dunut Fenders
Applications of Donut Fenders
1. Breasting dolphins
2. Corner protection
3. Guiding structures
4. Locks and dry dock entrances, corner protection, turning dolphins, areas with large tidal variations or bridge protections
5. Other monopile structures
6. Submarine jetties
Characteristics and Advantages of Foam Donut Fenders
1. Proportional load deflection curve
2. Low shear forces
3. Self-adjusting to changing water levels
4. Low installation costs
5. Generally maintenance free
6. Individual drafts can be controlled by counterweights
Sizes and Performance of Foam Donut Fenders
The performance of the standard size Donut fenders given below represents a small selection of sizes selected to give an indication of the performance of a fender as a guide only.
| Pile Diameter (PD) | Outer Diame- | Vertical con- | Energy Ab- | Reaction | Energy Ab- | Reaction |
| 500 | 1000 | 3000 | 14.7 | 224.6 | 24.5 | 374.7 |
| 600 | 1200 | 2000 | 13.7 | 179.5 | 23.5 | 300.2 |
| 600 | 1200 | 3000 | 21.5 | 269.6 | 34.3 | 450.2 |
| 900 | 1800 | 1000 | 15.7 | 135.3 | 26.4 | 224.6 |
| 900 | 1800 | 2000 | 32.3 | 269.7 | 51.9 | 450.2 |
| 900 | 1800 | 3000 | 48 | 405.1 | 78.4 | 674.9 |
| 1250 | 2500 | 2000 | 61.8 | 374.7 | 100.1 | 624.8 |
| 1250 | 2500 | 3000 | 92.2 | 562.1 | 151 | 937.8 |
| 1250 | 2500 | 4000 | 123.6 | 750.4 | 201.1 | 1249.7 |
| 1500 | 3000 | 2000 | 89.2 | 450.2 | 144.2 | 750.4 |
| 1500 | 3000 | 3000 | 133.4 | 674.9 | 200.6 | 1125.2 |
| 1500 | 3000 | 4000 | 177.5 | 899.7 | 289.4 | 1509.7 |
| 2000 | 4000 | 2000 | 157.9 | 600.3 | 257 | 999.6 |
| 2000 | 4000 | 3000 | 236.4 | 899.5 | 385.5 | 1499.9 |
| 2000 | 4000 | 4000 | 315.8 | 1199.7 | 514.1 | 2000.3 |
Generally Donut fenders are designed on a project by project basis taking into consideration the required berthing energy requirement and the size of the pile the fender will be installed on. The installation pile can either be existing or if new then the final size of the fender can be determined taking into consideration movement and therefore energy absorption of the pile.
Pictures of our Foam Donut Fenders
How to Select and Order Suitable Foam Donut Fenders?
Generally Donut fenders are made to measure.
We have therefore given the dimensions, weight and performance (table on previous page) in groups of sizes designed to be an indication of performance only.
Precise design and finalised dimensions can be calculated with project specific pile dimensions and berthing energy/reactive load requirements.
Please just drop us a message here below or send us an email with your requirement for a detailed design to suit your requirements.
Company Details
Business Type:
Manufacturer,Exporter
Year Established:
1998
Total Annual:
6,000,000-8,000,000
Employee Number:
110~120
Ecer Certification：
Verified Supplier
Initially established as Qingdao Luhang Marine Airbag Factory in 1988 and changed to Qingdao Luhang Marine Airbags and Fenders Co.,Ltd in 2011, Qingdao Luhang had been devoted itself to developing and manufacturing marine airbags and marine fenders for more than 2 decades. The factory area i... Initially established as Qingdao Luhang Marine Airbag Factory in 1988 and changed to Qingdao Luhang Marine Airbags and Fenders Co.,Ltd in 2011, Qingdao Luhang had been devoted itself to developing and manufacturing marine airbags and marine fenders for more than 2 decades. The factory area i...
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