Marine Mooring System
QD Waysail
Aquaculture
0102030405
Open Sea Fish Farming Aquaculture Cage HDPE Circular Floating Fish Cage
DESCRIPTION:
The main floating pipe of cage consists of two HDPE pipes with Φ≥200mm, which are welded into a fully closed ring by butt fusion welding. The inner and outer pipes are connected and fixed by a HDPE bracket. The handrail pipe consists of a round, hollow HDPE pipe welded by hot melt into a completely closed ring.
I-Frame consists of double holes HDPE bracket, upright and equal diameter tee, which are welded together by hot melt. Double holes HDPE bracket is a special pipe fittings for wind wave-resistant cage frame, manufactured by mould pressure injection molding, the thickness of the thinnest place is ≥20mm. The thickness of upright pipe and Tee ≥15mm. The I-frame is evenly distributed along the perimeter of the cage frame, with a spacing of 1.5m-2m.
SPECIFICATION:
| Circumference | Floating Pipe Dia. | Handrail Pipe Dia. | Upright Pipe and Tee Dia. | Bracket Hole Dia. | Distance of the Bracket |
| m | mm | mm | mm | mm | m |
| 40-60 | 250 | 125 | 125, 125/125 | 250 | 1.5-2 |
| 60-80 | 315 | 125 | 125, 125/125 | 315 | 1.5-2 |
| 60-80 | 315 | 125 | 140, 140/125 | 315 | 1.5-2 |
| 80-120 | 400 | 140 | 160, 160/140 | 400 | 1.5-2 |
| 100-140 | 450 | 140 | 160, 160/140 | 450 | 1.5-2 |
| 120-160 | 500 | 160 | 180, 180/160 | 500 | 1.5-2 |
DEFINATIONS:
| Component | Definition |
| Float Pipe, Inner | The float pipes provide the structural strength, circular profile and buoyancy to the netpen. The inner float ring is always buoyant and is foam filled. |
| Float Pipe, Outer | The outer float ring provides for similar functions as the inner float ring. The ring is generally flooded, but can be purged of water for additional buoyancy for surface operations. |
| Sink Pipe | Ring at bottom of cage. Composed of HDPE and filled with ballast for negative buoyancy. The negative buoyancy works with the float ring to provide tensile forces to the net and rib lines. |
| Bracket | Molded plastic that connects inner and outer float pipes. Equipped with sockets on dorsal surface over inner float pipe tunnel that anchors and supports stanchions. Generally held in place tangentially via welded stoppers. Brackets will be numbered clockwise, starting with forward most bracket and proceeding starboard. |
| Stanchion | Vertical pipe that supports handrail. It is supported by bracket. |
| Top Net Support | Sub-assembly of 2 rings and stanchions which functions to provide support for the top net and an air space below it when the cage is surfaced |
| TNS Top Ring | Structural Pipe that supports the Top Net out of the water at surface. Typically flooded, but not sealed |
| TNS Stanchion | Vertical Pipe that connects TNS Base Ring to TNS Top Ring. Typically flooded but not sealed |
| TNS Base | Structural Pipe providing buoyancy to lift top net out of water at surface. Typically purged. |
| Main Net | Vertical cylinder of mesh that makes up the majority of the net. Forms the “walls” of the pen |
| Top Net | Horizontal section of mesh, usually circular, at the top of the pen. Forms the “ceiling” of the pen. |
| Bottom Net | Horizontal section of mesh, usually circular, at bottom of the pen. Forms the “floor” of the pen. |
| Jump Net | Vertical cylinder of mesh that typically goes from float pipe to hand rail. Above water line while surfaced, traditionally to prevent fish jumping out in absence of a top net |
| Total Net | Summary net parameters, such as total volume, that are best expressed as cumulative from all net sections. |
| Nursery Net | Nylon net cylinder used inside of main net when fish are too small to be contained within the main net openings. |
| Rib Lines | Rib lines are vertical lines on the exterior of the net, supporting the sink pipe, usually suspended from one of the float pipes or brackets. Rib lines ensure that no weight is taken by the net itself. |
| TNS Lines | TNS Lines are used to keep the top net support in position. |
| Hand Rail Lashing | Lashings that connect mesh to the hand rail. Typically only support jump and top nets |
| Inner Float Pipe Lashing | Lashings that connect mesh to Inner float pipe. Typically support main net section. |
| Sink Pipe Lashing | Lashings that connect mesh to sink pipe. Typically support bottom net. |
| Buoy | Floating object that provides buoyancy. Should be have sufficient buoyancy to provide safety factor in pipe breach event. |
| Buoy Line | Rope connecting the buoys to the net pen. Typical knot - Boom hitch |
| Tow Line Crowsfoot | Responsible for evenly distributing the mooring force into the cage structure. Number varies from 3-7, mirrored about the central bridal. In this structure, the tow line crowsfoot runs from the netpen to the barge riser. |
APPLICATION:
