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. 
 Ordinary carbon steel wire casing (GB3640-88) is the electrical installation work in industrial and civil buildings, the installation of machinery and equipment used to protect the wire and the steel pipe. 
 7 straight seam welded steel pipe (YB242-63) is parallel to the longitudinal weld with steel pipe steel pipe. Usually divided into metric welded steel pipe, welding thin-walled tube, transformer cooling tubing. 
 Pressure fluid conveying tube submerged arc spiral welded pipe specifications (- SY5036 -83) is hot-rolled steel strip coils, often warm spiral shape, double submerged arc welding, for the pressure fluid transportation spiral seam steel pipe. Steel bearing ability, good welding performance, a variety of rigorous scientific examination and testing, the use of safe and reliable. Steel pipe caliber, transmission efficiency, and can save the laying of pipeline investments. Mainly used for transporting oil, natural gas pipeline. 
 9. Pressure fluid transport with high-frequency spiral welded pipe specifications (SY5038-83) is the volume of hot rolled strip tube, often warm spiral shape, frequency lap welding welding, for the pressure fluid transportation spiral high-frequency welded steel pipe. Bearing capacity of steel pipe, plastic welding and machining molding; a variety of strict and scientific inspection and testing, the use of safe and reliable, large diameter steel pipe, transmission efficiency, and save the laying of the pipeline investment. Mainly used for laying the pipeline transport oil and natural gas. http://www.hbthgg.com spiral steel pipe http://www.thgangguan.com spiral steel pipe http://www.naimoguanjian.com pump tube