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Marine Aquaculture
Cage System
Strong Wind &
Wave Resistance
Reduced
Aquaculture
Risks
Increased
Aquaculture
Efficiency
Excellent
Eco-friendliness
& Durability
Stock Code: 2128.HK
CONTENTS
01 Marine aquaculture
Honors
Product Certificates
& Patents
Project Cases
About The Group
Marine Cage Culture
/
03/
05/
02/
04/
06/
MARINE CAGE CULTURE SYSTEM 02
ABOUT THE GROUP
Established in 1986, LESSO (Stock Code: 02128.HK) is a global leader in home furnishings and building materials.
The Group’s business portfolio spans plastic piping, building materials and home furnishings, new energy and others.
It offers a wide range of products such as pipes, new energy solutions, sanitary ware, integrated kitchen cabinets,
integrated doors and windows, water purifiers, water-proofing materials and sealants, fire-fighting equipment, valves,
wires and cables, switches and sockets, roof sheets, items for environmental protection, agricultural facilities, and
ocean aquaculture cages. In 2023, LESSO’s sales revenue reached over USD 4.38 billion.
With the advancement of internationalization and globalization, LESSO has established more than 30 advanced
production bases in 19 provinces across China and some foreign countries, and its industrial and sales networks
cover regions and countries in five continents: Asia, Africa, North America, South America, and Europe. LESSO
remains committed to improving its strategic layout to broaden its sales networks and expand its market reaches,
enabling it to provide customers with diverse products and professional services in a timely and efficient manner.
LESSO has established its R&D center with over 1,000 scientific researchers. It now possesses forty-three national
high-tech enterprises, one nationally accredited enterprise technology center, two post-doctoral research centers, six
nationally accredited CNAS laboratories, one key laboratory for plastic molding processing technology enterprise in
Guangdong Province, and one industrial technology innovation alliance for plastic piping in Guangdong Province.
LESSO now boasts over 3,100 patents (some of them are pending). Its scientific achievements are included in the
National Torch Program Project, the National Key New Products, the Scientific and Technological Achievements
Promotion Project in the National Construction Industry, and the Government Green Procurement List. LESSO has
been awarded many honorary titles by relevant national departments such as the National Manufacturing Individual
Champion Demonstration Enterprise, the National Intellectual Property Demonstration Enterprise, the China Construction Science and Technology Independent Innovation Advanced Enterprise, and the Industrialization Demonstration
Base of the Ministry of Construction. It has won numerous prizes, including the First Prize for Scientific and Technological Progress of the China National Light Industry Council, the First Prize for Scientific and Technological Progress of
the Ministry of Education of PRC, the First Prize for Scientific and Technological Progress in the Guangdong Province,
the First Prize for Technological Invention in Guangdong Science and Technology Award, the Excellence Award of
China Patent Award, the Honorable Mention Award of China Quality Award, and the Guangdong Provincial Government Quality Award.
Patented technologies Production bases
30+
Products provinces
3100+ 100000+ 19
LESSO Research Institute
& Testing Center LESSO College Training Apartment
Enterprise Honors
National High-tech
Enterprise
Nationally Accredited Laboratory
(Registration No.: CNASL2583)
ISO9001、ISO14001、
QHSAS18000
ISO9001, ISO14001, QHSAS18000
China’s Top 500
Private Enterprises
Top 100 Enterprises in
China’s Light Industry
AAA Enterprise
Credit Rating
PICC Product Liability
Insurance
03 MARINE CAGE CULTURE SYSTEM
Product Certificates
MARINE CAGE CULTURE SYSTEM 04
Product Patents 05 MARINE CAGE CULTURE SYSTEM
What is marine aquaculture cage?
A marine aquaculture cage is a floating and anchored enclosure engineered for cultivating aquatic products in open sea
areas. It makes use of extensive marine waters without occupying land, thereby saving resources and benefiting from
excellent water quality. Different from indoor or pond-based aquaculture, marine aquaculture leverages seawater flow for
continuous water renewal and exchange. This process naturally flushes out residual feed and fish excretions without the need
for auxiliary power facilities, while maintaining stable dissolved oxygen levels and superior water quality. These optimal
environmental conditions promote fish growth and production. Thus, fish cultivated in marine cages not only achieve faster
growth rates, but also attain a quality closely resembling that of fish from natural marine environments.
Marine Aquaculture Cage
Comparison Between Traditional and Modern Marine Cages
07 MARINE CAGE CULTURE SYSTEM
Traditional Marine Cages
LESSO Marine Cages
Cage culture is a vital method in marine aquaculture with strong growth potential. Traditional marine cages are built with materials
such as bamboo, wood, and foam floats. Due to their poor structural stability and weak resistance to wind and waves, they can only
be installed in inner bays and nearshore areas. This often leads to overcrowding in farming zones, resulting in pollution, higher
disease risks, and other issues.
New-generation marine aquaculture cages developed by LESSO feature an integrated structure made of high-strength HDPE. With
standardized key components, these cages offer strong resistance to wind, waves, and currents. Their advantages include high
flexibility, quick installation, ease of overall relocation, environmental protection, and strong durability.
Product Standards
LESSO Marine Aquaculture
Executive Standards: QB/T5933, or Q/LS-58
The company mainly manufactures marine cage pipe products with standard dimension ratios (SDR) of 13.6 and 17.
Standard product colors are black or yellow; other colors are available upon agreement by the supplier and buyer. Standard pipe
lengths of cages are generally 9m or 12m;other lengths are subject to agreement between the supplier and buyer.
Unlike conventional linear fixing methods currently on the market,
LESSO anchoring system adopts an advanced tension-buffering
structure. The forces acting on the cage are distributed across
multiple points via primary and secondary cables, minimizing the
impact of wind and waves on the cage in harsh sea conditions and
boosting stability and operational safety. Patent No.:
201520446847.2
Tension-Buffered Anchoring
Made from high-strength HDPE, LESSO marine cage
frame provides excellent flexibility and elasticity to
effectively absorb wave impact and prevent damage.
The brackets adopt an innovative double-layer structure,
paired with continuous walkway for safer and easier
personnel access and operations. Compared with
ordinary discontinuous injection-molded walkway
commonly used in the industry, this continuous walkway
design distributes loads evenly, preventing load stress
concentration and local damage. Patent Nos.:
CN201520446312.5, CN201520446516.9
LESSO Flexible Marine Cage Frame
System Introduction
Product Features
The pipes and fittings for HDPE marine aquaculture cage systems produced by our company are manufactured from high-density
polyethylene (HDPE) through extrusion and injection molding processes.
Beyond the common advantages of plastic pipes and fittings such as good corrosion resistance, eco-friendliness, durability, smooth
surfaces, and low flow resistance, LESSO marine aquaculture cages also offer superior toughness, high strength, and enhanced safety
through the use of imported PE raw materials and an innovative multi-chamber structural technology. As a new-generation product,
LESSO HDPE marine aquaculture cages offer significantly improved overall performance in wind, wave, and current resistance
compared to traditional and other similar cages. They are also more convenient, more efficient, and safer to use, making them highly
regarded and favored in the industry.
MARINE CAGE CULTURE SYSTEM 10
LESSO Marine Aquaculture Cage System Conventional Wooden Marine Cage Culture System
Buoyancy Device
Environmental
Friendliness
Safety
Constructability
Cost-effectiveness
Aesthetics
Mobility
Productivity
Scope of
Application
Seakeeping
Performance
Durability
Cage Volume
Frame
Small volume and low output
Foam materials
Shallow waters in inner bays
Unsafe operation due to no guardrails equipped
Unable to accommodate large net structures
Weak durability results in new construction costs.
None
Inconvenient for relocation during red tides
Small farming capacity; fish are prone to diseases;
poor quality output results in low efficiency.
No toughness and weak seakeeping
5-10 years (wood needs maintenance and
buoys require replacement.)
The cages offer large volume and high output, making them ideal
for large-scale and commercial production. They can be installed
away from bays and shorelines, providing good water quality and
environmental conditions to ensure high survival rates, fast
growth, and high quality of the cultivated marine products.
High Economic Efficiency
Constructed from high-density and high-toughness HDPE, LESSO
marine cages can withstand Level 12 typhoons and tolerate
temperatures as low as -50°C. With a service life exceeding 15
years, they are suitable for offshore aquaculture.
LESSO marine aquaculture cages are made from HDPE, a highly
corrosion-resistant and non-polluting material.
HDPE marine cages are ideal for aquaculture in deeper offshore
waters away from land-based pollution thanks to their strong
wind and wave resistance, as well as long service life. This greatly
expands the farming areas and significantly relieves farming
pressure on nearshore bays.
Strong Wind-Wave Resistance,
Excellent Cold Tolerance & Long Service Life
Expanded Aquaculture Space Eco-Friendly & Pollution-Free
Independent Multi-Chamber Design
Structural
Comparison
Performance
Comparison
Large volume: A single offshore
cage unit is equivalent to the output of
100 traditional cages.
HDPE composite material offers high strength,
excellent corrosion resistance,
and strong wind-wave resistance.
Wood and bamboo materials exhibit poor strength
and weak wind-wave resistance.
HDPE hollow solid-wall pipe
Open waters with depth of 15m to 50m
Good toughness and strong seakeeping
Over 15 years; Main buoyancy materials
require no replacement.
Made from HDPE material,LESSO cages are
fully recyclable and pollution-free.
Equipped with guardrails for protection
Customizable dimensions
Excellent durability ensures low long-term costs.
Good
Easily relocated in the event of red tides
Large farming capacity, fast fish growth rates,
and high quality output
Traditional cages use foam buoys. Peeling and lost fragments are
not fully recyclable, causing serious environmental pollution.
Each pipe contains multiple independent sealed chambers. In the event of partial damage and leakage, water ingress is confined to the affected
chamber(s) and does not compromise all buoyancy pipes. This design greatly reduces operational risks and potential losses associated with
damage.
Used to construct various forms of
aquaculture cages in the aquaculture sector
Applications Used to build floating platforms
for sightseeing, operational
platforms, and floating bridges
in water environments such as
large fish ponds, reservoirs,
hydropower stations, docks, and
seaports
Used to build various forms of
floating platforms, docks, and
swimming pools in the tourism
and entertainment industries
MARINE CAGE CULTURE SYSTEM 12
No. Requirements
a.Carbon black content is only applicable to black pipes.
b.Carbon black dispersion is only applicable to black
pipes, and pigment dispersion is only applicable to pipes
of other colors.
≥20 min
≤3 %
2.0 % - 2.5 %
2
3
4
5
Oxidation Induction Time
Melt Mass-Flow Rate (MFR)
≥20 min
The variation in MFR before and after
processing should not exceed ±20%. 1
2
Pipe Properties
Fittings Properties
System Applicability
Tensile Yield Stress
Tensile Yield Stress, Elongation at Break
Flexural Strength
Ash Content
Butt Joint Tensile Strength Test to failure: Ductile failure - Pass; Brittle failure - Fail
Only applicable to systems with butt fusion connection between pipes or between pipes and fittings.
Physical and Mechanical Properties
Rating ≤3, Performance Grade: A1/A2/A3 or B
Black pipes: ≤0.1%
Other colors: ≤0.5%
Ash Content
Black pipes: ≤0.1%
Other colors: ≤0.5%
PE80: ≥18 MPac,d
PE100: ≥21 MPac,d
≥350 %c,d
6
6
7
7
8
9
3
Flexural Strength ≥20 MPa
Longitudinal Reversion a
Tensile Yield Stress a
Elongation at Break a
≤3 %
PE80: ≥18 MPa
PE100: ≥21 MPa
≥350 %
c. If failure occurs outside the gauge length,
the test is considered passed if the test value meets the
specified requirements.
d.Test can be stopped once required test values are
reached without damaging the sample.
4
5
≥20 MPa
Item
No. Item Requirements
Item Requirements
Melt Mass-Flow Rate (MFR)
The variation in MFR before and after
processing should not exceed ±20%.
Oxidation Induction Time
Longitudinal Reversion
Carbon Black Content a
Carbon Black Dispersion/Pigment Dispersion b
1
a. Only applicable to the walkways
13 MARINE CAGE CULTURE SYSTEM Monocolor/DoubleColor Walkway
Single Bracket Stop Block
Bolts, Nuts, Gaskets Guardrail
Sealed Coupling
HDPE Handrail Pipe
HDPE Buoyancy
Pipe
Vertical Pipe
Single-Layer Bracket Stop Block
Bolts, Nuts, Gaskets Reducing Tee
Sealed Coupling
HDPE Handrail Pipe
HDPE Buoyancy Pipe
Double-Layer Cage Frame Single-Layer Cage Frame
MARINE CAGE CULTURE SYSTEM 14
Pipes and Handrail Pipes for PE Marine Cages
Product Name Specifications dn (mm) SDR Remarks
Specifications dn (mm) SDR Remarks
Fitting
Product Name
SDR17
SDR13.6
SDR17
SDR13.6
SDR17
SDR13.6
SDR13.6
SDR17
SDR13.6
SDR17
SDR13.6
SDR17
SDR13.6
250
315
400
450
500
Marine Cage Buoyancy Pipe
Handrail Pipe
Butt Fusion
90° Elbow
Sealed Butt
Fusion 90° Elbow
Fittings for PE Marine Cages
Platform bracket is
required.
Yellow exterior and
black interior
90
110
110(Double-layer)
315
355
400
SDR13.6, SDR17
90
110
125
SDR11
SDR11
SDR11
For handrail pipes
355
SDR11
SDR11
SDR11
SDR11
SDR9
SDR11
Product Series
140
160
SDR11
SDR11
125
140
140
Vertical Pipe
15 MARINE CAGE CULTURE SYSTEM Product Name Specifications dn (mm) Color Remarks
Monocolor Walkway Pedal
Single Bracket
Double Bracket
Bracket Type II
Integrated Bracket
Single-layer Bracket
Single Bracket Type II
Double Bracket Type II
Double-color Walkway Pedal
Φ315
Φ355
Φ400
Φ400
Φ450
Φ355×140
Φ355×160
Φ400×140
Φ400×160
Pipe spacing: 715
Pipe spacing: 980
Extended type, pipe spacing: 910
130×50
145×75
250×75
300×75
320×75
400×75
Main body: Black
Anti-slip layer: Yellow/black
Main body: Black
Anti-slip layer: Yellow/black
Main body: Black
Anti-slip layer: Black/yellow/dark brown
Main body: Black
Anti-slip layer: Yellow/black
Main body: Black
Anti-slip layer: Yellow/black/dark brown
Main body: Black
Anti-slip layer: Yellow/black/dark brown
Product Name Specifications dn (mm)
MARINE CAGE CULTURE SYSTEM 16
Product Name Specifications dn (mm) SDR
Guardrail
Injection-Molded
Guardrail Type I
Φ130×130
Φ125×950
Φ110
Φ110×770
Φ110×800
Φ125×800
Length: 695
Length: 770
Length: 800
Length: 800, with 125 handrail pipes
Length: 1162, ΦD110 spigot,
with 75 pipes
Length: 950, with 125 handrail pipes
Sealed Coupling
Sealed Equal Tee
Sealed Lateral Tee
Reducing Tee
Stop Block
Sealed End Cap
315
355
400
450
SDR13.6, SDR17
SDR13.6
315
355
400
SDR17
SDR17
160×140
140×125
315
355
400
450
500
315
355
400
400 SDR13.6
Note: The molds for products marked with “★” on this page are still under development.
17 MARINE CAGE CULTURE SYSTEM
Multi-Chamber Welding
Guardrail Installation Handrail Pipe Installation 2 Handrail Pipe Installation Guardrail Installation 2
Buoyancy Pipe Welding
Walkway Welding 2 Walkway Welding 3 Walkway Welding 3 Walkway Installation
Marine Cage Construction Marine Cage 1 Marine Cage 2
Bracket Installation 2
On-Site Assembly Technical Support
1 3 4 Bracket Installation
5
9
6 7
2
8
10 11
14
12
13 15
Buoyancy Pipe
Equipment
Walkway
Equipment
Handrail Pipe
Equipment
Buoyancy Pipe
Fixer
Walkway Fixer
Handrail Pipe
Fixer
Walkway Heater
Handrail Pipe
Heater
Walkway Pressure
Tester
Handrail Pipe
Pressure Tester
Buoyancy Pipe
Heater
Buoyancy Pipe
Pressure Tester
Project Cases
Product Customization & Diversification
To meet the diverse needs of aquaculture operators, marine cages can be customized in various
shapes and sizes, including circular, square, and multi-connected square cages.
19 MARINE CAGE CULTURE SYSTEM Fujian Square Cage Project
Fujian Yufu Island Project
Guangxi Marine Cage Project
MARINE CAGE CULTURE SYSTEM 20
Hainan Chenhai
Four-Modular-Assembly Cage
Guangxi Water
Walkway Project
Yangjiang Marine Cage Project
21 MARINE CAGE CULTURE SYSTEM Guangdong Lake
Viewing Platform Project
Lingshui, Hainan
MARINE CAGE CULTURE SYSTEM 22
Wanshan, Zhuhai
Hainan Marine Cage Project
23 MARINE CAGE CULTURE SYSTEM
LESSO GROUP
Hotline:
E-mail:
+86 4009212800(Ext.1701)
oversea@lesso.com
Website: www.lesso.com
This catalog has been prepared as a support guide. Under no circumstance shall LESSO assume any liability or responsibility with the
information in this catalog. Every effort has been made by LESSO to
provide accurate and up to date information.
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2026.01
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