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RAS System Geomembrane Tank Liner

Name: China RAS System Geomembrane Tank Liner Manufacturers, Suppliers and Factory - Low Price - Ruiheng Building Materials
Brand: Ruiheng
SKU: 281763616

HDPE geomembrane liners are the engineering foundation of modern recirculating aquaculture systems (RAS). Made from premium high-density polyethylene, they provide a completely impermeable, non-toxic, and safe sealing solution for aquaculture ponds. This liner offers excellent resistance to UV radiation, puncture, and stress cracking, ensuring long-term performance and durability in demanding aquatic environments. Its smooth surface promotes optimal water flow and is easy to clean.

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Description

Products Description of RAS System Geomembrane Tank Liner

geomembrane liner

Tested Item	Test Method	Frequency	Minimum Average Value
			RH0.50 mm	RH0.75 mm	RH1.00 mm	RH1.50 mm	RH2.00 mm
Thickness, (minimum average), mm Lowest individual reading	ASTM D 5199	every roll	0.50 0.425	0.750 0.675	1.00 0.90	1.50 1.35	2.00 1.80
Density, g/cm3	ASTM D 1505	90,000 kg	0.940	0.940	0.940	0.940	0.940
Tensile Strength at Break, N/mm Strength at Yield, N/mm Elongation at Break, % Elongation at Yield, %	ASTM D 669	9,000 kg	13 7 700 12	20 11 700 12	27 15 700 12	40 22 700 12	53 29 700 12
Tear Resistance, N	ASTM D 1004	20,000 kg	60	93	125	187	249
Puncture Resistance, N	ASTM D 4833	20,000 kg	160	240	320	480	640
Carbon Black Content, % (Range)	ASTM D 603*/4218	9,000 kg	2.0 - 3.0
Carbon Black Dispersion	ASTM D 5596	20,000 kg	Note(1)	Note(1)	Note(1)	Note(1)	Note(1)
Notch Constant Tensile Load, hr	ASTM D 5397,	90,000 kg	300	300	300	300	300
Oxidative Induction Time, min	ASTM D 3895,	90,000 kg	>100	>100	>100	>100	>100

Key Features & Benefit of RAS System Geomembrane Tank Liner

1. Completely sealed and leakproof

Benefits: Prevents water loss, isolates external contaminants, ensures a stable and controlled aquatic environment, and protects groundwater resources.

2. Made from high-quality virgin high-density polyethylene (HDPE)

Benefits: Provides a non-toxic, inert sealing surface that is safe for fish and shrimp, from larvae to harvest, ensuring animal health and welfare.

3. Excellent resistance to puncture, abrasion, and stress cracking

Benefits: Withstands the physical demands of RAS environments, including fish activity, cleaning, and prolonged hydrostatic pressure, ensuring long-term reliability and reducing maintenance costs.

4. Used with high-quality carbon black for excellent UV resistance

Benefits: Provides long-term durability and performance stability for indoor and outdoor tank systems, preventing polymer degradation and extending the life of the liner for decades.

5. Smooth surface for optimal hydraulic performance

Benefits: Promotes efficient water circulation, effectively drains wastewater to a central drain, supports self-cleaning tank designs, and reduces the load on filtration systems.

6. Textured, non-slip surface option

Benefits: Provides secure footing on wet surfaces, reducing the risk of slips and significantly improving safety for operators and maintenance personnel.

Applications of RAS System Geomembrane Tank Liner

1. CircularTanks for fish and Shrimp

Providing a safe, stable, and controlled environment throughout the entire growth cycle (from vulnerable larval stages to harvestable adults), ensuring optimal animal health and productivity.

2. Nursery and Hatchery Ponds

Used in sensitive larval rearing and hatchery units, the inert, non-toxic properties of the lining are crucial to protecting fragile early life stages from contaminants and stress.

3. Water Treatment and Filtration Tanks

Used in lining sumps, sedimentation tanks, and biofilters within recirculation loops, ensuring all process water is safely controlled and managed to avoid leakage or contamination.

4. Makeup Water Reservoirs and Storage Tanks

Used in lining large freshwater or brackish water storage tanks, ensuring the quantity and quality of vital make-up water supplies are maintained and protected from external contaminants.

FAQ

Q1: How thick should a fly ash geomembrane be?
A: Typically 1.5-2.5 mm; thicker thickness is recommended for high-stress applications.

Q2: Why is HDPE the preferred material for fly ash storage?
A: HDPE offers excellent chemical resistance, high tensile strength, and long-term resistance to fly ash leachate (acids, alkalis, and heavy metals).

Q3: Can HDPE geomembranes withstand the high temperatures found in fly ash ponds?
A: Yes, HDPE can withstand temperatures up to 80°C (176°F) and remains stable under typical fly ash storage conditions.

Q4: Does an HDPE geomembrane require a protective layer?
A: Yes, a non-woven geotextile (300-500 g/m²) is recommended to prevent puncture from sharp fly ash fragments.

Q5: Can an HDPE liner be repaired if damaged?

A: Yes, patches can be permanently affixed by squeeze welding or hot wedge welding.