Deep Sea Anti-Wave HDPE Circular Tuna/Salmon/Croaker/Round/Square/Truss Type Fish Farming Pens Cages

Product Description

Product Description
HDPE Circular Fish Farming Cages, can also called as round net cage, cylinder net cage, gravity circular cage etc. It has the following characters:
Enhanced stability and durability: Circular cages offer better resistance to wind and waves, ensuring the safety and longevity of the structure.
Efficient space utilization: The circular shape allows for more efficient use of space, maximizing the area available for fish farming.
Improved water circulation: The uniform design of circular cages promotes better water circulation, which is essential for maintaining optimal water quality and promoting fish health.
Reduced stress on fish: The absence of corners in circular cages minimizes stress on fish, leading to improved growth rates and overall well-being.
Easy maintenance and cleaning: The symmetrical design of circular cages makes it simpler to access all areas for maintenance and cleaning tasks.
Versatile and adaptable: Circular cages can be easily modified or scaled up to accommodate different species and varying stocking densities.
Enhanced predator protection: The lack of corners in circular cages makes it more difficult for predators to target fish, providing an additional layer of protection.
Lower construction costs: In some cases, the simplicity of the design and materials used in circular cages can result in lower construction costs compared to other cage types.
Improved monitoring and management: The uniform layout of circular cages facilitates easier monitoring and management of fish populations, as well as the implementation of various aquaculture techniques.
Aesthetic appeal: Circular cages often have a more visually appealing appearance, making them suitable for various environments, including coastal areas and urban settings.
Detailed Photos
Installation Instructions
Installation Guide for Deep-Sea Aquaculture Cages**
1. Site Selection
Choose a location with stable water depth (typically 15-50 meters), moderate currents (0.5-1 m/s), and minimal exposure to extreme weather. Ensure compliance with local environmental and regulatory guidelines.
2. Pre-Assembly
- Lay out HDPE floating pipes, connectors, and buoyancy modules onshore or on a dock.
- Assemble the cage frame by connecting HDPE pipes using clamps or thermal fusion welding. Ensure joints are watertight and structurally secure.
- Attach netting to the frame using UV-resistant ropes or carabiners, leaving openings for feed systems and access points.
3. Deployment
- Tow the pre-assembled cage to the installation site using boats.
- Gradually submerge the cage into the water, allowing it to float naturally. Adjust buoyancy modules to achieve optimal stability.
4. Mooring System Setup
- Anchor the cage to the seabed using heavy-duty chains, synthetic ropes, or gravity anchors.
- Connect mooring lines to the cage's corners at a 30°-45° angle to distribute tension evenly.
- Install sinker weights or mid-water buoys to stabilize the cage against currents.
5. Equipment Integration
- Secure feed dispensers, sensors, and anti-predator nets to the cage structure.
- Test all systems (e.g., automatic feeders, oxygen monitors) to ensure functionality.
6. Final Inspection
- Verify the cage's alignment, buoyancy, and mooring tension.
- Check for leaks, loose connections, or netting gaps.
- Monitor the cage for 24-48 hours to confirm stability under tidal changes.
Safety Notes:
- Use weather forecasts to avoid installation during storms.
- Ensure all personnel wear life jackets and follow maritime safety protocols.
Note: This guide assumes standard HDPE cage systems; adjust steps for specialized designs.
Product Parameters

Stock No.	Circumference (M)	OD of floating pipe (MM)	OD of handrail pipe (MM)	OD of stand pipe (MM)	Breeding area (m2)	Distance of the brackets (M)
HSM0201001	60	315	110	conjoined structure	286	≤2.0
HSM0201002	80	315/355	125	conjoined structure	508	≤2.0
HSM0201003	100	355/400	125	conjoined structure	796	≤2.5
HSM0201004	160	400/450	125	conjoined structure	2038	≤2.5
HSM0201005	200	450/500	125	conjoined structure	3185	≤3.0
HSM0201006	300	500	125	conjoined structure	7165	≤3.0

Qingdao Haosail machinery Co., Ltd. is located in Qingdao, the central ocean city in northern China, and it is a national high-tech enterprise and technology innovation enterprise. Our company focuses on the R & D and production of the intelligent solution of deep-sea aquaculture equipment. Relying on advanced technology and reliable equipment, our company has long-term in-depth cooperation with customers in more than 20 countries such as United States, Australia, Singapore, Poland and Ukraine.
Our company takes scientific and technological innovation as the driving force, inherits the enterprise culture of "Haosail, worthy of your trust", and builds the company into a brand enterprise with a sense of mission and competitiveness.
Our Advantages
HDPE, lightweight high-strength alloy materials and other new materials are adopted in the structure. Computer control, various anti-corrosive, anti fouling (attachments) and anti-aging technologies greatly improve the overall structural strength and flexibility of deep-sea aquaculture net cage, double the service life of the cage, highly reduce the daily maintenance and the cost of aquaculture in unit volume, and improve economic benefits.

FAQ
Question: What are the characteristics of the material used in HDPE fish cages? Answer: HDPE (High - Density Polyethylene) material features high strength, corrosion resistance, aging resistance, and abrasion resistance. It can be used for a long time in complex marine environments like seawater. It is not easily corroded by seawater and can resist the irradiation of ultraviolet rays, thus prolonging the service life of the fish cage. Question: How stable is the structure of HDPE fish cages? Answer: HDPE fish cages usually adopt a reasonable frame structure design. The HDPE pipes are connected into a stable frame through special connection methods. This structure can withstand the impact of external forces such as wind and waves to a certain extent, ensuring the stability of the fish cage in the marine environment. However, the specific stability is also related to factors such as the size of the fish cage, the installation method, and the environmental conditions of the sea area where it is located. Question: How should HDPE fish cages be maintained on a daily basis? Answer: Daily maintenance includes regularly checking whether the netting of the fish cage is damaged, and whether there are cracks or damage to the HDPE frame, such as algae and shellfish on the surface of the fish cage should be cleaned in a timely manner to ensure the normal exchange of water. At the same time, check whether the mooring system is firm to ensure the fixed position of the fish cage in the sea. In addition, pay attention to the operating conditions of aquaculture equipment such as aerators and feeders, and carry out maintenance and upkeep regularly. Question: What is the approximate service life of HDPE fish cages? Answer: Under normal use and reasonable maintenance, the service life of HDPE fish cages is generally 10 - 20 years. However, if the sea area environment is harsh, or if it is severely damaged by external forces during use and not properly maintained, its service life may be shortened. Question:What maintenance technologies are employed for circular fish farming cages?
Answer: Haosail coppor alloy cage net can be used on this circular fish farming cage to highly reduce the maintainance cost, also advanced automation includes robotic cleaning brushes driven by motors will be used to remove algae from normal net automatically. Both of these can reduce manual labor and improves efficiency.