Zhejiang Petrochemical Company PX project involved an annual output of 40 million tons of petroleum refining, 10.4 million tons of arene and 2.8 million tons of ethylene, with a total
investment of 160 billion yuan. WANLI PIPELINE provided a pre-insulated piping system for heating with a diameter within DN50-DN600. With a design temperature of 120℃, design pressure of 1.6MPa and pipeline length of
2000m, the project was installed by underground laying method.