Welded Steel Pipe, also known as welded pipe, is made of steel plate or strip steel after curling forming welded steel pipe, general length of 6 meters. The production process of welded steel pipe is simple, the production efficiency is high, the variety specification is many, the equipment investment is little, but the general strength is lower than the seamless steel pipe. The products are widely used in tap water engineering, petrochemical industry, chemical industry, Electric Power Industry, agricultural irrigation and urban construction. FOR LIQUID TRANSPORTATION: water supply, drainage. For Gas Transmission: Gas, steam, Liquefied petroleum gas. As a structural use: As pile driving pipe, as a bridge; wharf, roads, building structures, such as pipe.