FAQ · Selection, Price, Installation & Acceptance

Price depends on thickness, resin grade (virgin/recycled), width, quantity and freight. Send us thickness (or application), quantity and destination for a same-day quotation at +86 13105341718.

0.5-0.75mm for normal ponds; 1.0mm with geotextile cushion where gravel or mechanical cleaning is involved.

Smooth for bottoms and gentle slopes; single-textured for 1:2.5-1:3 slopes; double-textured for slopes steeper than 1:1.5.

Virgin HDPE buried under cover lasts 30+ years; exposed service requires carbon-black stabilized black membrane and periodic inspection.

They are the same HDPE material. "Geomembrane" is the standard term (GB/T 17643); "pond liner" is the trade name emphasizing anti-seepage function in aquaculture and ponds.

0.5mm for earthen ponds; 0.75mm+ for raised and intensive ponds, smooth surface for easy cleaning.

Yes, with non-toxic virgin HDPE formula. Ask for the raw material confirmation and test documents when ordering.

Yes. Send pond dimensions and we produce cut-to-size panels to reduce on-site waste.

Smooth for flat and gentle areas (cheaper, easiest welding); single-textured for 1:2.5-1:3 slopes; double-textured for slopes ≥1:1.5. Zoning saves cost while keeping slope safety.

Set by trial weld per machine, film thickness and weather; below 5°C preheat and increase sampling.

Single-textured suits moderate slopes with the rough side toward the cover; double-textured gives the highest interface friction for slopes ≥1:1.5. Double costs more than single.

Yes for slope stability; base may stay smooth. Thickness ≥1.5mm per GB 55012-2021.

1.5-2.0mm double-textured on dam faces; verify chemical resistance for acidic/alkaline tailings.

Two-cloth protects both sides — for dam slopes, stony basins and key works; one-cloth is cheaper for flat, low-risk ponds.

By total weight and film thickness, e.g. 600 g/m² two-cloth-one-film with 0.75mm film. Confirm weight, film, fabric type and width when ordering.

For large areas the composite saves labor and schedule; separate layers suit special protection designs.

Filament (continuous fibers) is stronger and more durable; staple (short fibers) is more economical. Use filament for protection layers, exposed or reinforced zones; staple for general filtration and separation.

300 g/m² for general works; 400-600 g/m² for landfills and stony subgrades.

≥200mm on land, ≥300mm underwater or in critical filters, lapped with the flow.

Staple for general filtration/protection at lower cost; filament for exposed, reinforced or landfill protection layers.

Priced by weight (g/m²), fiber type, width and quantity. Contact +86 13105341718 for current quotes.

400-600 g/m² below and above membrane per most designs.

Black contains carbon black for UV resistance in exposed use; white is standard for covered applications.

EVA for most tunnels — flexible and cold-tolerant; HDPE where groundwater is chemically aggressive.

1.2-2.0mm for road/rail tunnels; 1.5-2.0mm for metro and critical works, subject to design and hydrology.

Arch ≤0.8m, walls ≤1.2m in quincunx layout; densify under high inflow or broken rock.

Double-seam air pressure test at 0.15-0.25 MPa with allowable pressure drop; failed spots patched and retested.

In most landfill and tunnel designs it can replace or reduce gravel layers, saving haulage and time; final decision by designer based on required transmissivity.

Commonly 4-6mm core with 800-1000 g/m² total weight at the base collection layer.

By core thickness, total weight, width and quantity. Send design parameters for a quote: +86 13105341718.

Lay top-down on a prepared base, lap ≥250mm in staggered pattern with bentonite powder in laps, fix at crest trench, and cover with ≥300mm backfill. No welding, but never install in rain.

Membranes give the lowest permeability but need welding; GCL installs fast on damp bases and self-seals. High-grade containment often uses GCL + HDPE composite liner with a leak detection layer.

Yes if no free water; rain or snow installation is prohibited, and installed areas must be covered before rainfall.

Prepare slope and toe footing, fill bags to ~80% with planting soil, stack in staggered courses with connectors, anchor steep zones, then spray-seed and cure.

UV-stabilized PP/PET fabric keeps structural stability for decades while vegetation takes over long-term protection.

Geobags for vegetated, landscape and fluctuating zones; cement blanket for high-scour channels. They can be combined by reach.

Level the base, lay geotextile cushion, unroll top-down with ≥100mm laps along flow, pin the laps, then water evenly to hydrate; keep unloaded for 24 hours.

In mountain, narrow or power-less sites it removes formwork, mixing and pumping, saving time and total cost; heavy-duty wide channels may still favor cast concrete.

The hardened layer is dense and scour-resistant as a lining; for strict containment combine it with a geomembrane underneath.

0.5mm normal ponds; 0.75mm crayfish or mechanical cleaning; 1.0mm plus geotextile where gravel exists.

Yes — non-toxic virgin HDPE formulated for aquaculture; request material confirmation with the order.

Pond bottom area + slope developed area, plus 8-10% for laps and trimming; send measurements for a factory layout and exact quantity.

0.5mm earthen ponds; 0.75mm+ raised/intensive; 1.0mm where machinery operates.

Virgin black membrane with 2.0-3.0% carbon black, one thickness up, anchor trenches ≥60cm and added ballast for typhoons.

Yes — smooth non-fouling surface: drain, pressure-wash, disinfect; saves labor, water and disease carryover.

0.3mm for shallow planting; 0.5mm plus geotextile where machines harvest or gravel exists.

No — non-toxic virgin HDPE is safe for aquatic crops, and it actually improves water and fertilizer retention.

Yes; the smooth film lets you wash and lift roots far faster than digging clay ponds.

0.75-1.0mm municipal; 1.0-1.5mm industrial or deep cells; uprate at the waterline zone.

Yes, HDPE handles acids, alkalis and microbial environments better than PVC-type films — the mainstream choice for sewage containment.

Full visual seam check plus sampled air-pressure tests, vacuum tests at details, batch documents verified, and a staged filling test within allowable drawdown.