Seamless steel pipe according to the different cross-sectional shape can be divided into round tube and shaped tube. To be seamless steel pipe to manufacture. Seamless steel pipe for geological drilling (YB235-70) is a seamless steel pipe used for core drilling in the geological department. 6. seamless steel pipe for oil cracking (GB9948-88) is applicable to the oil refinery furnace tubes, heat exchangers and seamless pipe.
Structure seamless steel pipe (GB / T8162-1999) is used for general structure and mechanical structure seamless steel pipe. According to different uses need to have other cross-section shape of the shaped seamless steel pipe.
Seamless steel and round steel and other solid steel, the same bending strength in the bending, the lighter weight, is an economic section of steel, is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipe, car drive shaft , Bicycle frames and steel scaffolds used in construction. Seamless steel pipe is a kind of hollow cross-section, there is no seam around the long steel. Therefore, galvanized steel pipe with wire plating as plating are dynamic in nature, with the difference between the wire plating, plating bath galvanized steel pipe is dynamic nature.
The tank by the upper and lower parts, the upper part of the plating tank, the lower part of the storage solution circulation tank, the narrow width forming a shape similar to the trapezoidal grooves in the plating bath has a channel running plated galvanized steel pipe, There are two holes in the bottom of the storage tank is connected to the lower, and the formation of the bath round robin system and sump pump. Unlike wire and galvanized steel pipe but has its unique slot equipment is more complex. Electroplated galvanized steel pipe with wire plating, as are all continuous plating, but different plating equipment.
Tests showed that aluminum sulfate and aluminum potassium sulfate is difficult to completely remove the one-time, affect the brightness of the coating, but not serious, may be accompanied by the consumption, the brightness can be restored at this time plating solution through the processing, according to new techniques additional ingredients required,to complete the conversion. Reorganization process, not only to carry forward the original process high current efficiency, fast deposition rate advantages, but also the dispersion ability and throwing ability has been greatly improved in the past can not be plated complex parts, simple and complex parts can now plated and protective properties increased by 3 to 5 times faster than a single metal. The British, European and International standard for hot-dip galvanizing is BS EN ISO 1461 which specifies a minimum coating thickness to be applied to steel in relation to the steels section thickness e.g. a steel fabrication with a section size thicker than 6 mm shall have a minimum galvanized coating thickness of 85 µm.
A hot-dipped galvanized coating is relatively easier and cheaper to specify than an organic paint coating of equivalent corrosion protection performance. Saving time and effort: the the galvanizing process faster than other coating construction method, and can avoid the the brushing time required on site after installation.