Galvanized Seamless steel pipe, referred to as seamless pipe, is a steel pipe made of a single piece of metal with no joints on the surface. Galvanized Seamless steel pipes are generally used as pipelines or structural parts for conveying fluids, or pipelines for conveying oil, natural gas, gas, water and certain solid materials, etc.

Welded pipe, that is, welded steel pipe, is a steel pipe made of strip steel or steel plate after being crimped and formed. Widely used in water engineering, electric power industry, urban construction, petrochemical industry, chemical industry, agricultural irrigation, etc.; usually used as pipes for bridges, wharves, roads, building structures, etc.; also used for liquid and gas transportation, etc.