Application scope 1. The pipeline of the power plant boiler pulverization system includes powder conveying pipeline, coarse and fine powder separator pipeline, coal drop pipeline, primary air pipeline, secondary air pipeline, tertiary pipeline, and burner pipeline of the combustion system, as well as slag discharge pipeline, return powder pipeline, and dry ash conveying pipeline of the ash removal and slag discharge system; 2. Wear and tear bends such as raw material conveying pipelines, receiving pipelines, dust removal pipelines, ash discharge pipelines, ash drop pipelines, batching and mixing pipelines, mill outlet pipelines, coal burning pipelines, coal powder pipelines, separator pipelines, burner square and circular pipelines in steel plants; 3. Wear bends such as the outlet pipeline of the cement plant's selection machine, the inlet pipeline of the selection machine, the dust collection pipeline, the vertical mill's air outlet pipeline, the circulating air pipeline, the coal mill's high-temperature fan air pipeline, and the discharge pipeline; 4. Various pipe fittings for processing and conveying materials in petroleum, chemical, mining, coal, coal washing plants, smelting, papermaking, aluminum industry, building materials, powder engineering, grain machinery, etc.