Amarração de ponto único - Jerryborg Marine

Os produtos de amarração de ponto único da Jerryborg Marine são fabricados e fornecidos de acordo com os documentos de orientação relevantes da OCIMF. Todos os produtos atendem aos requisitos da OCIMF para sistemas de amarração de ponto único, incluindo a orientação da OCIMF sobre aquisição e teste de linhas de amarração emitida em 2000.

Conforme recomendado pela OCIMF, os terminais não devem se concentrar apenas na resistência à tração dos cabos de amarração ao selecioná-los. A capacidade de amortecimento da linha sob tensão e seu desempenho após o uso repetido a longo prazo também devem ser considerados. Explicações específicas sobre esses aspectos podem ser encontradas nas diretrizes subsequentes da OCIMF relacionadas às operações de navios-tanque.

É particularmente importante observar que o desempenho das linhas de amarração não é estático. Com o uso prolongado, a nova resistência à ruptura úmida, a capacidade de amortecimento de tensão e o desempenho geral da linha diminuirão gradualmente. Essa mudança é afetada por vários fatores, como a vida útil real, a frequência do estresse, o tipo e a estrutura da linha, as condições do ambiente operacional, a presença de danos e as condições de armazenamento quando não estiver em uso.

Portanto, ao selecionar linhas de amarração para o sistema de amarração e estabelecer padrões de substituição ou sucateamento correspondentes, os operadores de terminal devem considerar de forma abrangente os fatores acima, em vez de fazer julgamentos com base apenas em um único ponto de dados.

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Single-Point-Mooring-Hawsers-Jerryborg-Marine

Materiais	Poliamida (Nylon)
Densidade	1,14g/cm³
Ponto de fusão	218-258℃
Resistência à abrasão	Excelente
Resistência aos raios UV	Bom
Resistência química	Bom

Single Point Mooring Hawsers Structure

Os cabos de amarração de nylon com trançado duplo da Jerryborg Marine apresentam uma estrutura trançada em camadas. A camada interna é um núcleo trançado de 12 fios, com uma camada externa de proteção trançada. A estrutura geral é robusta e resistente à abrasão, atendendo aos requisitos de força e estabilidade das condições de amarração de ponto único, o que a torna amplamente utilizada em projetos relacionados.

Em ambas as extremidades do cabo de amarração, são usados ilhós pré-fabricados da Jerryborg Marine. Os principais pontos de tensão são equipados com luvas protetoras de metal, e um revestimento de poliuretano é adicionado ao exterior para reduzir o desgaste durante o uso prolongado, aumentando assim a vida útil da linha de amarração.

Dependendo das necessidades reais de uso, a Jerryborg Marine também pode configurar flutuadores apropriados na linha de amarração para manter uma boa flutuabilidade na água, facilitando a operação e o gerenciamento no local.

A produção e os testes dessa série de cabos de amarração de nylon com trançado duplo estão em conformidade com os requisitos relevantes da OCIMF 2000 para cabos de amarração de ponto único.

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Single Point Mooring Hawser Specification

DIÂMETRO	CIRC	PESO	Força de ruptura (tonelada)
mm	polegada	kg/100m	Perna única	Anel isolante
80	10	398	148	252
88	11	482	179	304
96	12	572	208	354
104	13	672	250	425
112	14	772	288	490
120	15	887	327	556
128	16	1010	368	626
136	17	1140	419	712
144	18	1280	460	782
152	19	1420	501	852
160	20	1580	551	937
168	21	1740	599	1018

Outros tamanhos estão disponíveis mediante solicitação.

Advantages of Jerryborg Marine Hawser

1. Greater peace of mind for offshore projects

Once the Marine Hawser is attached, it continuously bears tensile force. In actual offshore applications, your concern isn’t the specifications, but its stable operation during work. In one project involving ship-to-ship iron ore transshipment, the hawser remained attached for several berthings throughout the day without significant slack or deformation. The client later reported that it worked better than expected and required less frequent adjustments.

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2. Suitable for high-frequency operating environments

Some ports require multiple berthings or transshipments per day. Frequent changes in tensile force mean that an insufficiently robust hawser will wear or stretch over time. We select the appropriate number of strands and diameter based on the client’s operational needs. In actual projects, such a hawser can withstand repeated operations without easily encountering problems.

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3. Greater focus on actual wear and tear

In the offshore environment, friction and tensile force are constant. Some clients are concerned about rapid surface wear on the cable when using it for the first time. Our Marine Hawser features a wear-resistant outer layer, and after several weeks of field use, surface wear was minimal. Customers can operate with peace of mind without having to frequently change equipment.

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4. Adjustable length and structure based on project requirements

Different projects have different buoy locations and vessel sizes. An inappropriate length can lead to difficulties on-site.

We typically confirm the intended use with the client before determining the length and specifications. This avoids the need for readjustment on-site.

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5. Easier to coordinate with fenders and buoys

In offshore transshipment projects, hawser is often not procured separately. It’s frequently considered in conjunction with fenders and buoys.

If the entire system is supplied by the same party, specification confirmation is smoother. Size mismatches are also less likely to occur during on-site installation.

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6. More direct communication after completion

Cables are long-term components, and issues inevitably arise that require confirmation, such as the degree of wear requiring replacement.

We maintain contact after completing a project. Clients can directly communicate if they have any questions. Confirming many issues in advance prevents disruptions to work schedules.

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Perguntas frequentes

1. What is a Mooring Hawser?

A mooring hawser is essentially a large cable specifically designed for mooring operations. It’s not the short cable used on ordinary ships, but rather used in single-point mooring or ship-to-ship operations to bear the main tensile force. In many offshore projects, the connection between the ship and the buoy relies heavily on it to withstand continuous tension.

Jerryborg Marine can provide mooring haws of varying strengths depending on the project’s tensile strength. We typically confirm the ship’s tonnage and operating environment first, then recommend the appropriate specifications, rather than providing a generic model.

2. In what scenarios are mooring haws typically used?

This type of cable is commonly found in offshore anchorages, single-point mooring buoys, or ship-to-ship transshipment projects. Especially in oil and ore transshipment, where ships don’t dock but connect directly at sea, the hawser is a critical component.

Jerryborg Marine also provides haws when undertaking buoy or fender projects, facilitating a complete solution for clients and eliminating the need to find separate suppliers.

3. What materials are commonly used in a mooring hawser?

High-strength synthetic fibers, such as nylon or polyester, are commonly used. Different materials have different characteristics; some have high elongation and good cushioning, while others have low elongation and are more stable. The specific choice depends on the project requirements.

Jerryborg Marine will recommend materials based on the client’s operating frequency and stress conditions. For high-frequency ship berthing projects, we will focus more on abrasion resistance and long-term stress performance.

4. How is the strength of the Mooring Hawser determined?

Strength mainly depends on the maximum tensile force of the project. The required breaking strength is usually calculated based on the ship’s tonnage, environmental conditions, and safety factor. It cannot be too low, otherwise there is a risk; nor is it necessary to blindly choose too high, as this will increase costs.

Jerryborg Marine will communicate with the client about the operating conditions before confirming the order. If the client has basic data, we can also assist in verification to avoid selecting the wrong specifications.

5. What problems might arise during the use of a Mooring Hawser?

After prolonged use, common issues include outer layer wear or localized deformation due to stress. In offshore environments, the effects of salt spray and ultraviolet radiation must also be considered. Therefore, regular inspections are necessary.

Jerryborg Marine conducts basic strength and appearance inspections before shipment. If customers discover any abnormalities later, they can take photos, and we will assist in determining whether replacement is necessary.

6. How long can a Mooring Hawser last?

The lifespan is greatly influenced by the frequency of operation. Long-term, high-frequency transport projects will experience faster wear. Periodic use will result in a longer lifespan. The key is regular inspection and maintenance.

Jerryborg Marine also reminds customers to perform daily inspections when providing the hawser. With proper use, it can provide stable service for a considerable period.