1 generally low pressure liquid delivery spiral submerged arc welded pipe specifications (SY5037-2000) is a hot-rolled steel strip for the tube volume, temperature often spiral shape, using single-sided or double-sided automatic submerged arc welding with the legal system into in water, gas, air and steam is generally low pressure liquid delivery such as submerged arc welding steel pipes. 
 (2) generally low pressure liquid delivery frequency spiral welded pipe specifications (SY5039-83) is a hot-rolled steel strip for the tube volume, temperature often spiral shape, high frequency welding lap welding method for general low pressure liquid delivery Spiral High-frequency welded steel pipe. 
 3. Pile with spiral welded pipe specifications (SY5040-2000) is a hot-rolled steel strip for the tube volume, temperature often spiral shape, with double-sided submerged arc welding or high frequency welded, and for civil engineering structures, piers, bridges, etc. with steel foundation piles. 
 4 low pressure liquid delivery welded steel pipe (GB/T3092-1993), also known as general welded pipe, commonly known as the clarinet. Is used for conveying water, gas, air, oil and steam heating and other general low pressure fluid and other uses welded steel pipe. Then divided into ordinary steel pipe wall thickness and thicker steel; take over the side into the form without the steel tube (fluorescent tubes) and with a steel pipe. Specifications of steel pipe with nominal diameter (mm) that the nominal diameter is the diameter of the approximation. Customarily used in inches, such as 11 / 2 and so on. Low fluid transport in addition to direct welded steel pipe for conveying fluids, but also a lot for low-pressure fluid Galvanized welded steel pipes of the original tube. 
 5 low-pressure fluid Galvanized Welded Steel Pipe (GB/T3091-1993), also known as galvanized welded steel pipe, commonly known as white tube. Is used for conveying water, gas, oil and air heating steam, heated fluid such as low-pressure or other general purpose welding of hot-dip galvanized (furnace brazed or welded) steel pipe. Then divided into ordinary pipe wall thickness galvanized steel and thicker galvanized steel pipe; take over the side into the form without threaded galvanized steel pipe and threaded galvanized steel pipe. Specifications of steel pipe with nominal diameter (mm) that the nominal diameter is the diameter of the approximation. Customarily used in inches, such as 11 / 2 and so on. 
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