Tianhui piling pipe diameter 630 piling pipe piling dedicated spiral steel pipe piling www.bengguan168.com www.thgangguan.com www.naimoguanjian.com like low pressure fluid with high-frequency spiral welded pipe specifications (SY5039-83) is hot-rolled steel coil tube, often warm spiral shape, frequency lap welding method and welding for general low pressure fluid to high frequency welded steel pipes with spiral seam. 
 ??? 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. 
 ??? 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. 
 ??? Low pressure fluid delivery galvanized welded steel pipes (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 wires of steel pipes. 
 ??? Straight seam welded steel pipe (YB242-63) weld steel pipe longitudinal parallel steel. Usually divided into metric welded steel pipe, welding thin-walled tube, transformer cooling tubing. General low pressure fluid seam submerged arc 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 for water , gas, air and steam, low pressure fluid conveyance of submerged arc welded pipe