A low pressure fluid conveyance of submerged arc welded spiral welded pipe specifications (SY5037-2000) is a hot-rolled steel strip coils for tube, often warm spiral shape, using double-sided automatic submerged arc welding or single-sided welding into the legal system with The low pressure fluid such as water, gas, air and steam for the conveyance of submerged arc welded pipe. 
 (2) the low pressure fluid delivery tube with high-frequency spiral welded pipe specifications (SY5039-83) is a hot-rolled steel strip coils, often warm spiral shape, the use of high-frequency overlap welding Welding method for low pressure fluid transport with spiral high-frequency welded steel pipe. 
 3. Pile with spiral welded pipe specifications (SY5040-2000) is a hot-rolled steel strip coils of the tube, often warm spiral shape, made of double-sided submerged arc welding or high frequency welding for civil construction structures, piers, bridges, etc. The foundation piles with steel pipes. 
 4 low pressure liquid delivery pipe with welded steel pipe (GB/T3092-1993), also known as the general, commonly known as the clarinet. Used for conveying water, gas, air, oil and heating steam low pressure fluid, and for other purposes welded steel pipe. The steel pipe connected to the wall thickness is divided into ordinary steel and thicker steel; take over the side into the form without the steel pipe (fluorescent tubes) and with a steel pipe. Specifications of the tubes with nominal diameter (mm) said that the nominal diameter is the diameter of the approximation. The habit usually expressed in inches, such as 11/2 and so on. The low pressure fluid welded steel unless used directly in the transmission fluid, but also a large number used as a low pressure fluid of the original tube of galvanized welded steel pipe. 
 (5) the 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, air, oil and heating steam, heated and other general low pressure fluid or other uses hot-dip galvanized steel pipe welding (furnace welding or welding). Steel pipe connected to the wall thickness is divided into ordinary galvanized steel and thicker galvanized steel; take over the side into the form of threaded galvanized steel pipe and threaded galvanized steel pipe. Specifications of the tubes with nominal diameter (mm) said that the nominal diameter is the diameter of the approximation. The habit usually expressed in inches, such as 11/2 and so on. http://www.thgangguan.com spiral steel pipe http://www.naimoguanjian.com pump tube http://www.hbthgg.com spiral steel pipe factory