Dredging Equipment
Straatman is an established manufacturer and supplier and well known in the dredging industry for the quality and reliability of our products. Through the years, we developed our dredging equipment program, delivering our products all around the world. Our main products are Bow Couplings, Turning Glands and Quick Release Ball joints. We have our own factory in the Netherlands, which keeps the lines short and we can ensure the quality of our processes and products. Our enthusiastic and skilled team is committed on every level. Delivering high-quality products is our number one priority!
Our Dredging Equipment
Dredging Joints & Equipment
Since 1965, Straatman has been active in the dredging industry, starting with the development of a steel plate ball joint for floating pipelines in cooperation with Bos & Kalis.
Today, Straatman offers a full range of dredging components and equipment, serving customers around the world. Backed by over 65 years of continuous innovation, we are recognized for our reliability, quality, and practical engineering solutions.


Bow Couplings for Hopper Dredgers
Straatman is the proud creator of the bow coupling system, developed for efficient discharge operations on hopper dredgers.
A bow coupling provides a fast and secure connection between the vessel and a floating pipeline, improving efficiency in dredging and land reclamation projects. This solution has become a proven and effective method within the dredging industry.
Key characteristics:
- Hydraulic locking system for safe connection and disconnection
- Heavy-duty design for offshore and harsh conditions
- Unlimited rotation of the male part for operational flexibility
- Proven performance with hundreds of installations worldwide
Since 1984, we have delivered hundreds of bow coupling systems to leading dredging companies worldwide.
Turning glands
Our turning glands are designed to allow rotation within dredging pipelines under pressure and heavy load conditions.
The ball turning gland is commonly applied on cutter suction dredgers, allowing the vessel to rotate freely around the pipeline axis
Benefits:
- Increased manoeuvrability of dredging vessels
- Reduced stress on pipeline systems
- Reliable operation under high-pressure conditions
- Available with wear-resistant and exchangeable liners


Quick Release Ball Joints
Our quick release ball joints are designed for fast connection and disconnection of floating pipelines and hoses, typically used between dredgers and pontoons.
Key features:
- Rapid connection system for operational efficiency
- Hydraulic or manual operation options
- Robust retaining ring construction for secure coupling
- Suitable for cutter suction dredgers and floating pipelines
Often combined with turning glands, these ball joints form a reliable and flexible dredging pipeline system.
Special Dredging equipment
In addition to our bow couplings, turning glands, and ball joints, Straatman offers a range of specialized dredging equipment including jet water monitors and cold-pressed bends. This portfolio supports a wide variety of dredging applications worldwide.
Our in-house facilities enable us to deliver custom-made solutions and special designs, tailored to specific project requirements and operational needs.


Spares & Maintenance
At Straatman, we maintain an extensive and well-organised archive of our dredging equipment projects. This allows us to supply spare and wear parts long after a vessel was built.
Even after years and multiple ownership changes, we can trace the original equipment of a vessel. When replacement parts are needed, we retrieve the exact specifications. Based on this information, we supply the correct parts anywhere in the world.
Let’s discuss your Dredging project
- Specialist in dredging systems
- Proven solutions used in demanding dredging environments
- Over 65 years of experience
- Dutch Engineering and high-quality manufacturing

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