What is the function of the safety valve of the pneumatic fender
06/02/2025Tips to Check Pneumatic Fender Quality Online
06/03/2025Fenders for Safe Ship to Ship Operations
Introduction: Ensuring Safety in STS Transfers
Ship-to-ship (STS) operations are essential in the maritime industry, enabling the transfer of cargo such as crude oil, LNG, and chemicals between vessels without port docking. However, these operations come with inherent risks, particularly the danger of vessel collisions. That’s why marine fenders play a critical role in preventing damage and ensuring safety.
In this article, you’ll discover why fenders are vital for STS operations, what types are available, and how to choose the most effective solution for your needs.
What Is a Ship-to-Ship (STS) Operation?
A ship-to-ship operation occurs when two vessels moor side-by-side to transfer cargo. Often, shipping companies carry out these operations offshore or in anchorages when port access is limited or impractical.
Because vessels float independently, movement from waves, wind, or current increases the risk of collision. Consequently, shipowners must use specialized fenders to reduce impact forces and maintain vessel integrity.
Why Fenders Are Crucial in STS Operations
Fenders act as shock absorbers between vessels. They not only reduce physical damage but also help ensure smooth cargo handling and safety compliance.
Here’s how they contribute to safer operations:
- Prevent direct hull contact between ships
- Absorb and distribute impact energy during movement
- Minimize structural damage and protect crew members
- Support international safety compliance, including IMO and ISO standards
Without fenders, even minor vessel drift could lead to costly damage or oil spills.
Best Types of Fenders for STS Operations
1. Pneumatic Fenders (Yokohama Type)
Among all fender types, pneumatic fenders are the most common choice for STS operations. Their air-filled design provides excellent energy absorption while minimizing reaction force.
Key Advantages:
- Deliver high energy absorption with low stress on hulls
- Perform well in rough sea conditions
- Allow fast and easy deployment
- Offer flexibility with chain-net, tire-net, or sling-type options
- ISO 17357 1:2014
2. Foam-Filled Fenders
In addition to pneumatic models, foam-filled fenders also provide excellent protection. Their solid foam core ensures buoyancy even when the outer layer is punctured.
Why Choose Foam-Filled Fenders?
- They resist punctures and never deflate
- Their durable construction supports frequent use
- They require minimal maintenance over time
Therefore, they are ideal for medium-sized vessels or calm water operations.
How to Select the Right Fender for STS
Before choosing a fender, you should evaluate several factors. Doing so ensures operational safety and cost-effectiveness.
| Factor | Why It Matters |
|---|---|
| Vessel size | Larger ships need higher energy absorption fenders |
| Sea conditions | Strong currents and waves require pneumatic types |
| Fender placement | Midship, bow, and stern placement improves stability |
| Operation frequency | Frequent use justifies investing in durable materials |
| Safety standards | Fenders must meet ISO 17357 or OCIMF regulations |
In short, matching fender capacity with environmental demands is critical.
Why Choose NANHAI for STS Fender Solutions
At NANHAI, we design and manufacture high-performance fenders tailored for STS operations. Whether you need standard sizes or custom solutions, we have you covered.
Our Advantages:
- Full ISO 17357 compliance
- Custom branding and size options
- On-time delivery and expert support
- Proven track record across global markets
We offer various fender types, including:
- Pneumatic (Yokohama-type and sling-type)
- Foam-filled for high-durability needs
- Full accessory kits (air compressors, chains, valves)
Conclusion: Protect Every STS Operation with Quality Fenders
Every ship-to-ship transfer involves risk. However, with the right fender system, you can safeguard your vessels, cargo, and crew. Pneumatic and foam-filled fenders provide essential protection and ensure regulatory compliance.
If you’re planning an STS operation, don’t leave safety to chance. Contact NANHAI today to get a tailor-made fender solution that meets international standards.
FAQs
Q1: How many fenders are required for STS operations?
Most operations need 4 to 8 fenders depending on the ship size and sea conditions.
Q2: Can pneumatic fenders be reused?
Yes. With proper care and maintenance, they can last over 10 years.
Q3: Are NANHAI fenders certified?
Absolutely. All our fenders meet ISO 17357 and are tested for performance and durability.