1. What Is Ship-to-Ship (STS) Operation and Why Is It Risky?
Ship-to-Ship (STS) operations happen when two ships are moored side-by-side to transfer cargo, usually oil, LNG, or chemicals. While this process is common, it can be risky. Waves, wind, and current can move the ships and cause them to collide. This might lead to damage, cargo spills, or even injuries.
To stay safe, ships need strong, reliable protection between their hulls. That’s where pneumatic fenders come in—they act like giant cushions that absorb shock and reduce impact during STS transfers.
2. What Are Pneumatic Fenders and How Do They Work?
Pneumatic fenders are large, air-filled rubber cylinders. They usually have a tough outer rubber layer, layers of tire cords inside, and metal flanges at both ends. Some fenders come with chain and tire nets for extra protection.
They work by compressing the air inside when pressure is applied. This lets them absorb a lot of energy while keeping reaction force low. This makes them much better than solid rubber fenders when it comes to protecting ships during side-by-side contact.
3. Why Are Pneumatic Fenders Ideal for STS Operations?
High Energy Absorption, Low Reaction Force
Pneumatic fenders can absorb up to 90% of impact energy while giving off very low force in return. This helps protect both ships during mooring.
Float with the Tide
Since they float, pneumatic fenders rise and fall with water levels. No matter how the tide moves, the fender stays in the right place and keeps working.
Easy to Install and Move
They are lightweight and easy to handle. You can inflate or deflate them quickly, making them ideal for both short-term and emergency use.
Long-Lasting and Easy to Maintain
Made from high-quality rubber and reinforced with tire cords, they resist seawater, sunlight, and rough weather. Most can last 6 to 10 years with only basic maintenance like pressure checks and cleaning.
Environmentally Friendly and Cost-Effective
By reducing the chance of ship collisions, they help prevent oil leaks and pollution. Although the initial price may be higher, they save money over time by reducing damage and insurance claims.
Meet International Standards
Many pneumatic fenders meet ISO 17357 standards, making them suitable for use on oil tankers, LNG ships, offshore platforms, and navy vessels.
4. Meet SunHelm – A Trusted Pneumatic Fender Manufacturer
About SunHelm
SunHelm Marine is a professional marine equipment manufacturer based in Shandong, China. Since 2003, they’ve focused on producing pneumatic fenders, marine airbags, foam fenders, and more. Their products are certified by ISO9001, ISO14001, CCS, BV, DNV, and other major classification societies.
Product Highlights
- SunHelm uses 100% natural rubber and high-strength cord layers to make strong, safe fenders.
- Their fenders can handle pressure far above ISO 17357 standards.
- Each fender is customizable in size and can be delivered quickly, saving storage and shipping costs.
- Available sizes range from 500 mm to 4500 mm in diameter and up to 6000 mm in length.
Service and Support
- SunHelm offers full support, from design consultation to after-sales service.
- Their team has over 5 years of experience and can help plan the best STS fender setup.
- They offer warranties, free replacements, and remote installation guidance.
- The company works with reliable shipping partners to reduce delivery time and cost.
5. Why Choose SunHelm for Your STS Fender Needs?
| Benefit | How SunHelm Delivers |
|---|---|
| Top Performance | Exceeds ISO pressure standards; built-in safety valve |
| Wide Size Options | Custom sizes from 500 mm to 4500 mm for all ship types |
| Cost Saving | Foldable for shipping; long service life lowers total cost |
| Certified Quality | ISO17357, CCS, BV, and other certifications |
| Reliable Support | Experienced team and fast technical assistance |
6. Conclusion
Pneumatic fenders are a must-have for safe and smooth ship-to-ship operations. They offer high shock absorption, move with the water, and are easy to use and maintain. SunHelm is a trusted brand that delivers top-quality fenders with reliable service and global certifications.
Whether you’re transferring oil between tankers or managing emergency docking, SunHelm’s pneumatic fenders give you peace of mind, protect your investment, and help you stay compliant with safety standards.