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3Selection items
6Steps
1FAQs
GBStandards cited
Summary: Wastewater ponds use 1.5 mm HDPE membrane (2.0 mm for aggressive media) with GCL or geotextile cushion; every pipe and embedment node is extrusion-welded and sealed, verified by 100% weld testing plus full-water test.
Selection Table
| Position / function | Recommended material | Standard |
|---|---|---|
| Pond liner | 1.5 mm smooth HDPE (2.0 mm if aggressive) | GB/T 17643-2025 |
| Secondary layer | GCL 5000 g/m2 for key projects | JG/T 193-2006 |
| Cushion | 300-400 g/m2 staple geotextile | GB/T 17638-2017 |
Installation Steps
- Base acceptance: flat, dry, no sharp objects
- Lay cushion and GCL if designed
- Lay membrane with settlement slack, double-seam on flats
- Extrusion weld and seal all pipes and embedments
- 100% weld testing, repair and retest
- Full-water test then backfill or commission
