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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