As the demand for durable, high-performance geomembranes grows across agriculture, aquaculture, and water conservation projects, standardization becomes essential. In India, IS 15351:2015 serves as the definitive guideline for quality and performance of laminated HDPE woven geomembranes. Developed by the Bureau of Indian Standards (BIS), this specification ensures reliability, consistency, and safety in critical lining applications.
📘 What is IS 15351?
IS 15351:2015 is the Indian Standard titled:
“Agro Textiles — Laminated High Density Polyethylene (HDPE) Woven Geomembrane for Waterproof Lining — Specification.”
It applies specifically to HDPE woven fabric laminated with LDPE or a blend of LDPE and LLDPE. These geomembranes are designed for waterproof lining in canals, ponds, and reservoirs, helping prevent seepage and extend the life of water storage systems.
The standard outlines four types of geomembranes (Type I to IV), based on thickness and mass per unit area, ranging from 0.25 mm to 1.00 mm thickness and 250 to 950 g/m² in weight.
🔍 Key Requirements and Testing Parameters
IS 15351 ensures product integrity through strict testing across several performance indicators:
- Thickness and GSM
- Tensile strength before and after UV exposure
- Tear and puncture resistance
- Impact and bursting strength
- Seam strength, both pre- and post-UV exposure
- Hydrostatic resistance and carbon black content
- Ash content (maximum 1%) to monitor purity
All tests must be performed as per BIS methods (IS 7016, IS 13162, IS 15060, etc.).
⚙️ Material and Lamination Guidelines
The geomembranes covered under IS 15351 are made using HDPE woven fabric laminated on both sides. The lamination uses LDPE or a suitable combination of LDPE and LLDPE, with minimum coating thickness of 25 microns for double lamination, and 35 microns for sandwich lamination.
If the liner is intended for potable water use, the film must be made from food-grade polymer as per IS 10146.
🏷️ Marking, Packaging, and Certification
Each roll must be clearly marked with:
- Manufacturer’s name and source
- Type, dimensions, and GSM
- Batch number and date
- Standard name: IS 15351:2015
- BIS certification mark (if licensed)
Packaging should be in roll form, typically in lengths of 500 meters or as mutually agreed upon by buyer and seller.
📌 Conclusion
IS 15351:2015 is the cornerstone of quality for laminated HDPE woven geomembranes in India. It ensures that materials used for lining ponds, canals, and reservoirs meet national benchmarks for strength, durability, and environmental safety. Whether you’re a manufacturer, government agency, or end-user, understanding and following IS 15351 is essential for delivering long-term performance and trust in water conservation projects.