摘要
Abstract
To address the difficulties in on-site internal anti-corrosion construction and the challenges in ensuring quality for traditional carbon steel vent pipes of impulse turbines in international hydropower projects,this study explores and verifies the feasibility of polyethylene(PE)pipes as an alternative material.Taking the Nam E-Moum Hydropower Station in Laos as a case study,a comprehensive comparison is conducted among stainless steel pipes,galvanized steel pipes and polyethylene pipes regarding their medium compatibility,strength,anti-corrosion performance,construction difficulty and cost.Mechanical calculations and adaptability assessments including strength,deformation,stability and thermal stress under buried conditions are performed for the selected large-diameter polyethylene pipes.The results indicate that polyethylene pipes with an outer diameter of 500 mm and a wall thickness of 23.9 mm meet all specified mechanical requirements.Engineering practice confirms that the pipe installation and unit operation are stable and reliable.Moreover,compared with steel pipes,polyethylene pipes offer comprehensive advantages such as easier corrosion protection,higher construction efficiency and lower cost.Polyethylene pipes can successfully replace traditional carbon steel pipes for ventilation pipes in impulse turbines,providing a reliable technical solution and practical reference for addressing similar engineering challenges.关键词
冲击式水轮机/通气管/聚乙烯管道/材料选择/埋地管道Key words
impulse turbine/vent pipe/polyethylene pipe/material selection/buried pipeline分类
能源科技
