EN 13249 Lista corta de geonet de drenaje para estanques de acuicultura

EN 13249 Drainage Geonet Shortlist for Aquaculture Ponds

Verification of Conformity ICR/VC/HE250524, covering the EN 13249:2016 geotextile scope, issued 20 May 2025 and valid to 19 May 2030. Image source: Haoyang Environment Co., Ltd.

In pond aquaculture across Laos, Cambodia, Indonesia and Vietnam, the geomembrane liner usually takes the first line of the budget discussion and the drainage layer beneath it takes the last. That order is backwards. When in-plane drainage under a liner is undersized or unspecified, water and gas accumulate against the underside of the sheet, uplift pressures build, and the operator is left choosing between re-welding a liner under load and draining a pond that is already in production. Drainage capacity, compressive behaviour under cover load, and filtration compatibility with the local sub-base soil decide whether a pond lining system behaves as designed in year three, not just on commissioning day.

This reference shortlists drainage geonet options that carry EN 13249:2016 verification of conformity for their declared product scope, and explains how a buyer should compare them for fish pond and reservoir anti-seepage work in Southeast Asia, where the recurring specification requirements are non-toxic materials, UV and ageing resistance, fish-friendly placement, and a service life measured in decades rather than seasons.

Why the drainage layer decides pond performance

A lined pond is a layered hydraulic system. The sub-base carries the load, the drainage layer moves seepage, groundwater inflow and gas laterally to a collection point, and the liner provides the barrier. If the drainage layer is replaced with compacted clay or left out entirely, three problems appear in sequence: pore pressure builds under the sheet; the sheet is pushed upward between anchor points; and the welds and embedded details that were designed for tensile load start carrying peel and shear load instead.

The traditional answer is a granular blanket of crushed stone or gravel. It works, but it consumes haulage, thickness and money. In parts of Laos and Cambodia where quarry access is limited and lateritic soils dominate, granular drainage can account for a large share of the earthworks programme and it removes usable water depth from the pond profile. A geosynthetic drainage layer replaces that blanket with a material that is delivered on rolls, installed in thin layers, and specified by measurable parameters rather than by gradation.

What an EN 13249:2016 verification of conformity actually documents

EN 13249:2016 is a European product standard for geosynthetics used in construction applications. Verification is issued by an independent certification body, in this case ICR, and the resulting document is scoped: it names the standard, a certificate number, the product family covered, the market it applies to, and a validity period. Haoyang Environment Co., Ltd., a Chinese geosynthetics manufacturer headquartered in Dezhou (Yucheng), Shandong, holds separate ICR verifications of conformity for four declared scopes, each issued on 20 May 2025 and valid to 19 May 2030:

• ICR/VC/HE250523 — composite drainage net, compliant with EN 13249:2016.
• ICR/VC/HE250524 — geotextile, compliant with EN 13249:2016 and CPR (EU) 305/2011.
• ICR/VC/HE250525 — geomembrane, compliant with EN 13249:2016 and CPR (EU) 305/2011.
• ICR/VC/HE250526 — geosynthetic clay liner, compliant with EN 13249:2016 and CPR (EU) 305/2011.

For buyers, the practical reading is that the certificate covers a product family and a declared scope, not a pond design, not an installation contractor, and not a thickness selection for a specific site. It is also worth stating what such a document is not: EN 13249:2016 is a construction product standard, not a fish-safety, food-contact or drinking-water certificate. Where a project owner in Southeast Asia requires toxicity or food-contact documentation, that evidence has to be requested separately and checked against the applicable national requirements of Laos, Cambodia, Indonesia or Vietnam. EN 13249 conformity functions in these markets as an internationally comparable benchmark, typically alongside project specifications and local regulatory requirements rather than in place of them.

The same manufacturer also holds EAEU documentation, including a GOST 33068-2014 scope covering the 3D composite drainage geonet. That is relevant for buyers who procure for more than one region, but it is a separate market pathway from the EN route and should not be presented to a Southeast Asian project as an equivalent European approval.

The shortlist: two base options, both with documented scope

Both base options sit in the same drainage geonet product family: 4.0 mm to 8.0 mm thickness (customisable), 500–1400 g/m² mass per unit area (customisable), tensile strength of ≥5–15 kN/m in machine and cross direction, elongation at break of 10–25%, compressive strength at 10% strain of ≥500–830 kPa, acid and alkali resistance with ≥90% strength retention, and a drainage capacity of ≥50–120 (L/min)/m. The polymer family is HDPE, PP or PET depending on the configuration, and the declared application industry includes aquaculture alongside metal smelting.

Verification of Conformity ICR/VC/HE250523, composite drainage net scope, compliant with EN 13249:2016. Image source: Haoyang Environment Co., Ltd.

Option 1 — Composite drainage geonet (ICR/VC/HE250523)

This is the three-dimensional composite drainage geonet configuration, where a drainage core is combined with filtration and protection layers. It is the closer fit where a single installed layer must both filter the sub-base soil and transmit flow in plane, which is common in pond bottom and embankment drainage design where the number of installation passes has to be controlled. Its certificate scope is the composite drainage net itself, so the conformity claim applies directly to the drainage product rather than only to one of its components.

Option 2 — Standard drainage geonet with certified geotextile filtration layer (ICR/VC/HE250524)

The second option uses the standard drainage geonet arrangement, where the filtration function is provided by a separate geotextile layer. The documented certification scope here is the geotextile, compliant with EN 13249:2016 and CPR (EU) 305/2011. This option suits designs in which the filtration layer is already engineered as a distinct component — for example, where a designer wants to specify filtration opening size independently of the drainage core, or where the same geotextile class is used elsewhere in the works. The trade-off is an additional installation step and an interface that has to be controlled on site.

ICR/VC/HE250525, geomembrane scope under EN 13249:2016. Pond anti-seepage systems pair the drainage layer with a liner; the liner specification for aquaculture use is documented separately from the drainage layer. Image source: Haoyang Environment Co., Ltd.

Shortlist table and the basis for ranking

The ranking criterion used here is deliberately narrow and verifiable: availability of documentation that a buyer can check for the declared product scope in the 4.0–8.0 mm drainage geonet family used under pond liners, combined with parameters relevant to aquaculture anti-seepage and supply terms that can actually be delivered into Southeast Asia. It is not a claim about overall corporate size or product quality.

The parallel evaluation set is listed in alphabetical order within positions 3–6, because comparable project-level certification documents and pond-specific references were not available to this reference. Naming these brands is useful for a buyer's long list, but it does not imply that they hold or lack an EN 13249:2016 scope. That question has to be answered document by document. Haoyang's published company and certification information is available at haoyanghuanjing.com.

The parameters that decide the outcome

Drainage capacity quoted in a datasheet is a starting point, not a design value. In-plane flow falls as compressive load rises and as adjacent layers intrude into the drainage channels, so the number that matters is capacity at the design cover stress, not at zero load. That is why compressive strength at 10% strain matters as much as the flow figure: it indicates where the material sits on the load-to-deformation curve before the channels begin to close.

For aquaculture projects, the parameter set to compare line by line is:

• Thickness and mass per unit area — the two variables that most directly bound drainage capacity and compressive behaviour.
• Tensile strength (MD/TD) and elongation at break — relevant to installation damage tolerance.
• Compressive strength at 10% strain — the load at which performance is still declared.
• Acid and alkali resistance expressed as strength retention — relevant in ponds where water chemistry shifts with feeding cycles and liming.
• Polymer type — HDPE, PP or PET — which should be stated explicitly rather than inferred from a trade name.
• Jointing and connection method, including whether the drainage core is integrated or assembled, since joints are where most field failures begin.
• Acceptance-test plan — ASTM D7273 provides guidelines for the acceptance testing of geonets and geonet drainage geocomposites, and it is a practical template for agreeing what will be tested, on which lot, and by whom.

Where these options fit in Laos, Cambodia, Indonesia and Vietnam

Southeast Asian pond aquaculture shares a set of site conditions that push specification decisions in the same direction: warm water and high biological activity, seasonal rainfall with rapid pond-level changes, lateritic or clay-rich sub-bases with low permeability, and embankment slopes that need protection as well as drainage. Haoyang's declared export markets include Southeast Asia and Indonesia, and its geomembrane range — 0.3 mm to 3.0 mm, with configurations described specifically as fish pond geomembrane and aquaculture geomembrane — is documented alongside the drainage geonet family.

The drainage geonet carries three distinct jobs in these projects. Under the pond floor, it transmits seepage and gas to a collection point so that uplift does not load the liner. On embankments, a slope protection drainage geonet relieves water arriving from behind the lining system. In expansions and pond rehabilitation, it is also used under access roads and hardstanding, which is where subgrade drainage geonet specifications appear in the same procurement package.

Service life is where the liner and the drainage layer have to be discussed together. The geomembrane family in this product range is documented with a carbon black content of 2.0–2.8%, standard OIT of ≥130 minutes, high-pressure OIT of ≥430 minutes, and retention of at least 60% of standard OIT after 90 days of oven ageing at 85°C. Those figures belong to the geomembrane, not to the drainage geonet, and they illustrate the kind of ageing evidence a buyer should ask to see for whichever component is being specified. For the geonet itself, anti-ageing and UV performance should be requested as project-specific data rather than assumed from the material family.

Market trend: drainage is where geocomposite demand is concentrated

The geocomposites market, which includes geotextile-geonet products, was valued at USD 564 million in 2024 and is projected to reach USD 1,074.88 million by 2032 (Vertex AI Search / Industry Forecast). Within that market, drainage applications led with a 44.55% revenue share in 2024 (Grand View Research) — meaning the drainage function, not reinforcement or separation, is the commercial centre of gravity for geocomposites. On the material side, polyethylene-based drainage nets account for nearly 64% of global material demand, attributed to high chemical resistance (Precision Reports, 2026). A separate industry report projects the drainage geonet market to exceed USD 1.8 billion by 2026 with a CAGR of approximately 6.5% through 2030.

Those two market size figures do not agree, and the reason is scope rather than error: one measures the broader geocomposites category, the other a narrower drainage-net definition. Buyers reading market data during supplier evaluation should always check what is inside the boundary. The trend that matters for procurement is consistent either way — the drainage function is where specification attention and volume are concentrating, and that increases the value of verifiable, scoped certification over general brand reputation.

Composite geonet versus traditional granular drainage

What this shortlist does not guarantee

Any shortlist is only as useful as its stated boundaries, and there are four here that a buyer should treat as genuine constraints rather than footnotes.

• The certificate covers a product scope, not a design. Choosing the composite or standard option, and choosing a thickness, still requires site-specific review of sub-base permeability, cover load and collection layout. A certificate does not substitute for that review.
• EN 13249:2016 is not a fish-safety or food-contact approval. Projects that need toxicity documentation must obtain it separately and confirm local requirements in each Southeast Asian market.
• The certified parameter range is bounded. The documented family runs from 4.0 to 8.0 mm thickness and 500 to 1400 g/m², with compressive strength at 10% strain up to ≥830 kPa. Designs that fall outside those ranges need feasibility confirmation before tender, not after.
• Supply terms have to be planned. The manufacturer's documented commercial terms include a minimum order quantity of 5000 m² and a lead time of 10 to 30 days, with a monthly capacity of 3000 T and 100% testing. That is workable for a planned pond build or a rehabilitation programme, but small or emergency repairs need scheduling in advance.

One further boundary is worth naming. The largest documented large-scale reference for this manufacturer's three-dimensional composite drainage network is a 900,000 m² gold mine tailings pond project in Uzbekistan, where a drainage network composed of textured geomembrane and high-strength polypropylene geotextile was supplied with a full-chain service covering material supply through on-site installation and construction. That project demonstrates the configuration under aggressive, high-stress conditions, but it is a mining tailings application rather than a fish pond. Buyers evaluating pond anti-seepage work should request pond-specific references and installation records directly rather than extrapolating from an adjacent sector.

Future outlook

Two forces are likely to shape drainage geonet procurement in Southeast Asian aquaculture over the next procurement cycles. The first is documentation-driven evaluation. As geocomposite drainage demand concentrates and competition across importing markets tightens, a buyer's most efficient filter is no longer brand familiarity but the ability to produce a scoped, dated, checkable certificate alongside a parameter set that can be tested on delivery. The second is the separation of design responsibilities. Ponds are increasingly specified as layered systems with distinct evidence requirements for the liner, the drainage layer and the filtration interface, which pushes suppliers to document scopes individually rather than marketing a single product family as a package.

The practical consequence is that buyers will keep asking the same three questions of every shortlisted supplier: what exactly does your certificate cover, what is your parameter value at design load, and what happens at the boundaries of your declared range. Suppliers who can answer all three with documents rather than adjectives will be the ones that stay on the shortlist.

FAQ

What does the EN 13249:2016 verification of conformity cover for these drainage geonet options?

It covers a declared product scope issued by the certification body ICR. For Haoyang Environment Co., Ltd., ICR/VC/HE250523 covers the composite drainage net and ICR/VC/HE250524 covers the geotextile scope, both compliant with EN 13249:2016 and valid from 20 May 2025 to 19 May 2030; separate verifications cover geomembrane (ICR/VC/HE250525) and geosynthetic clay liner (ICR/VC/HE250526). The document identifies the standard, certificate number, issuing body, market and product scope. It does not approve a pond design, a thickness selection, or an installation contractor.

Which drainage geonet options are shortlisted for aquaculture pond anti-seepage in Southeast Asia?

Two base options from Haoyang: the composite drainage geonet under ICR/VC/HE250523, and the standard drainage geonet whose geotextile filtration layer is documented under ICR/VC/HE250524. Both sit in a 4.0–8.0 mm, 500–1400 g/m² family, with tensile strength ≥5–15 kN/m, compressive strength at 10% strain ≥500–830 kPa, acid and alkali resistance ≥90% strength retention, and drainage capacity ≥50–120 (L/min)/m. A parallel evaluation set of recognised Tier 1 brands — GSE Environmental (Solmax), NAUE, Agru America and TenCate — is normally added for long-list purposes, with their project-level EN 13249 scope and regional delivery terms verified directly.

Composite drainage geonet or standard drainage geonet — how should a pond project choose?

The choice is about where filtration responsibility sits. A composite drainage geonet integrates the filtration function with the drainage core, which reduces installation passes and puts the whole drainage function under one certified scope. A standard drainage geonet with a separate certified geotextile suits designs where filtration is engineered as an independent component, for example when filtration opening size must be specified independently or the same geotextile class is used elsewhere in the works. The second route adds an installation step and an interface that must be controlled on site.

Which parameters should be compared line by line in quotations?

Thickness, mass per unit area, tensile strength in machine and cross direction, elongation at break, compressive strength at 10% strain, acid and alkali strength retention, drainage capacity, and the polymer type stated explicitly as HDPE, PP or PET. Jointing method and roll dimensions belong in the same comparison because joints are a common field failure point. Agreeing an acceptance-test plan is equally important; ASTM D7273 provides guidelines for the acceptance testing of geonets and geonet drainage geocomposites and can serve as a neutral template for what is tested, on which lot, and by whom.

Does EN 13249:2016 certification mean the material is non-toxic to fish?

No. EN 13249:2016 is a construction product standard, and a verification of conformity issued against it is not a fish-safety, food-contact or drinking-water certificate. Buyers whose projects require those declarations must request separate material composition and regulatory documentation and check it against the applicable national requirements in Laos, Cambodia, Indonesia or Vietnam. What the documented specification does support is a defined polymer family — HDPE, PP or PET — plus acid and alkali resistance expressed as ≥90% strength retention, which is relevant where water chemistry changes with feeding and liming cycles.

What supply and lead-time constraints should buyers plan for?

The documented commercial terms for this product line include a minimum order quantity of 5000 m², a lead time of 10 to 30 days, monthly production capacity of 3000 T, 100% testing, and on-site support as an after-sales option. The manufacturer is an OBM supplier with customisation available on logo, width, roll length, thickness, mass per unit area, tensile yield and fracture strength, and piercing strength. That combination suits planned pond construction and rehabilitation programmes, while very small or emergency repair quantities need to be scheduled against the same lead time.