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HDPE Fish Cage Tee

HDPE Fish Cage Tee DN90 / DN110 / DN125 mm, PE100 HDPE, to ISO 4427 PE100, for aquaculture cage systems.

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Product Overview

The HDPE Fish Cage Tee is the injection-moulded three-way connection used at every frame corner and pipe intersection of an HDPE floating fish cage. Unlike fabricated or butt-fusion tees that can become weak points under wave loading, the HDPE Fish Cage Tee is injection-moulded from PE100 HDPE as a one-piece component with thickened walls at the intersection for maximum impact resistance.

Standard HDPE Fish Cage Tees are produced in DN90, DN110 and DN125 mm sizes, matching the standing pipe and handrail pipe sizes used across the fish cage range, with 250 mm large tees and elbows available for square cage frames. All tees are pre-drilled for pin fasteners at each connection end, enabling tool-free assembly on site.

Quick Information

  • Product Name: HDPE Fish Cage Tee
  • Material: Injection-moulded PE100 HDPE
  • Nominal Sizes: DN90 / DN110 / DN125 mm
  • Connection: Pin fastener (pre-drilled holes)
  • Standard: ISO 4427 PE100
  • Service Life: 15+ years in seawater

Specification Table

Tee and elbow specifications matched to each fish cage size. All fittings are HDPE injection-moulded, PE100 material, to ISO 4427. Pin holes pre-drilled for connection.

Fitting Type Description Cage Size Qty per Cage
Tee 110 mm 110 mm HDPE Tee, injection moulded 8 m Circular 15 ea
Tee 127 x 125 mm 127 x 125 mm HDPE Tee, injection moulded 10-25 m Circular 17-40 ea
Tee 250 mm 250 mm HDPE Tee, large injection moulded 10 m x 10 m Square Cage 12 ea
Elbow 110 mm 110 mm HDPE Elbow 10 m x 10 m Square Cage 16 ea
Elbow 250 mm 250 mm HDPE Elbow 10 m x 10 m Square Cage 4 ea

Note: Tee quantity varies with cage diameter and standing pipe count. DN90 tees serve handrail pipe circuits; DN110/DN125 tees serve standing pipe frames. Quantities for custom fish cage sizes are calculated at project design stage.

Key Features

  • One-piece injection-moulded body: No weld seam and no butt-fusion weak point - the thickened wall at the intersection of the HDPE Fish Cage Tee carries wave and impact loading that would crack a fabricated fitting.
  • Pre-drilled pin holes: All three ends are pre-drilled for pin fasteners, so the tee locks to the fish cage frame without drilling or welding on site.
  • Three standard sizes plus square-cage fittings: DN90 for handrail pipe, DN110 and DN125 for standing pipe, with 250 mm tees and elbows for square fish farming cage frames.
  • PE100 corrosion-free: No galvanic corrosion in seawater, unlike brass or steel fittings - the tee stays maintenance-free for the 15+ year life of the fish cage.
  • UV-stabilized compound: Carbon black PE100 prevents UV degradation, since tees sit above the waterline in full marine sun exposure.
  • Dimension-matched to cage kits: The tee sizes above are the same ones supplied with our 8-40 m HDPE floating fish cage kits, so spare tees always fit the existing frame pipes.

Production

Raw Material

Every HDPE Fish Cage Tee is moulded from virgin PE100 HDPE injection compound with carbon black. Material test reports are provided per shipment, covering melt flow rate and tensile strength so the fitting keeps consistent toughness in seawater service.

Molding Process

Tees are injection-moulded in a multi-cavity mould, and the pre-drilled pin holes are formed during moulding for consistent tolerance across every piece. This one-step moulding is what gives the fish cage tee its seamless, weld-free three-way body.

Quality Control

Every tee is dimension-checked against drawings, pin hole tolerance is verified for consistent pin fit, and PE100 material traceability is maintained from raw material lot to finished fitting batch.

Applications

  • Floating fish cage frame corners: Three-way connection at each standing pipe intersection of circular cages.
  • Handrail pipe circuits: DN90 tee for handrail pipe continuation around the cage perimeter.
  • Square cage frames: 250 mm tees and elbows for 10 m x 10 m united square fish farming frames.
  • Walkway frame assembly: Tee connection points for walkway panel support structures.
  • Feeding platforms: Frame joints for feed distribution platforms serving groups of fish cages.
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