Leister Secures China’s Jurong Pumped Storage Project

Author: Mario Jiang, Leister Technologies Ltd.

Supporting China’s Green Energy Shift

Jurong Pumped Storage Power Station is a cornerstone project in China’s energy storage strategy. It was developed and is owned by the State Grid Corporation of China (SGCC). Located in Jiangsu Province, this 1.35 GW hydropower plant plays a vital role in grid stability and renewable integration in the Yangtze River Delta, one of China’s most power-hungry regions.

Rather than continuously generating electricity, the facility stores excess energy by pumping water from a lower to an upper reservoir when demand is low. When needed, the water is released to generate electricity via reversible pump turbines.

A World Record for Dam Height

The dam at Jurong reaches 182.3 meters—making it the highest of its kind worldwide. It can store over 17 million cubic meters of water. Built for long-term performance, the dam structure required the highest sealing integrity across geomembrane installations.

Reliable Sealing for Complex Conditions

In 2025, units completed and facility moved toward full operation, Leister GEO tools performed the final sealing job there. To seal the reservoir’s geomembrane lining, two materials were used: HDPE for solid ground, and TPO on softer backfill. Contractors deployed Leister’s COMET 700 for HDPE welding and TWINNY T7 for TPO seams. Both machines were paired with LQS GEO, Leister’s data-recording system, to track seam quality and ensure documentation compliance.

Seam consistency, temperature control, and speed precision were essential on steep slopes and varying soil conditions. Leister’s lightweight and high-performing tools proved ideal for the task—delivering airtight welds and minimizing rework time, even under pressure.

Sealing Backed by Smart Data

With LQS GEO, project teams documented every weld. This traceability is key for critical infrastructure projects, where proof of performance and long-term reliability are non-negotiable.

Precision Backed by Local Service

In this complex environment, local support was also essential. Leister’s on-site partners ensured training, calibration, and service were available without delay—reinforcing the Swiss standard of quality through every meter welded.

Building infrastructure for energy security? Discover how Leister's welding systems help deliver safe and durable geomembrane seals—anywhere in the world.