Now the city needs seamless steel tubes, can be collectively referred to as hot-rolled seamless steel tubes and cold-rolled seamless steel tubes. The two kinds of steel, the production process is not the same, compared to hot-rolled seamless steel tubes, cold-rolled seamless steel pipe production process is relatively more complicated. Not only to carry out three rolling, as well as crack test, cutting, and then into the final return process. Cold-rolled seamless pipe in the annealing, pickling this step is inevitable. Pickling process, the staff need to wear safety equipment. At the same time also have to look carefully whether there is a large number of bubbles on the surface of the pipe, the more the case, the quality of the steel does not meet the relevant requirements.

        Compared to the tedious steps of cold-rolled seamless steel pipe, hot-rolled seamless steel pipe is much more seemingly. Just need to be in hot-rolled state, after heat treatment can be. However, the delivery intensity slightly higher than the 15 steel, rarely quenching, no temper brittleness. High cold deformation plasticity, generally for bending, rolling, bending and hammer arch processing, arc welding and welding properties of the welding, gas welding, the thickness of small, demanding or complicated shape parts of the shape of the crack. Machinability Cold drawn or normalized state is better than the annealed state, generally used to create less stressed and toughness demanding. The annual inventory of 10,000 tons to maintain annual sales volume of billions of dollars. The sale of products are the implementation of national standards for engineering, coal, textile premises, is the need to go through the selection of relevant staff, as well as through rigorous experiments. After the final test pass, it can be affixed to the surface of the related trademarks, the arrangement of the set 16Mn seamless steel pipe is widely used. General purpose seamless steel pipe is made of common carbon structural steel, low alloy structural steel or alloy structural steel with the most output and is mainly used as a pipe or structural part for transporting fluid. Such seamless steel pipe made of steel is widely used Hydraulic props, high pressure gas cylinders, high pressure boilers, fertilizer equipment, petroleum cracking, semi-axle sleeve car, diesel engines, hydraulic pipe fittings with surface quenching or high-frequency quenching and other treatment. Therefore, depending on the chemical composition (mainly carbon content), heat treatment process and use of different. On the warehouse, ready for delivery. These are just two different seamless steel pipe in the process of making the difference.

        In appearance, there is a difference between the two pipes. First, the length of the cold-rolled seamless steel pipe to be slightly shorter. On the thick wall, cold-rolled seamless steel pipe wall thickness to a little company specializing in the operation of various specifications seamless steel pipe, seamless steel pipe, thick-walled steel, seamless steel pipe manufacturers, the strict implementation of national standards, all from The factory and large state-owned steel mills, such as: Masteel, Laiwu Steel, Baotou, Heavy Steel. As the largest steel pipe production and processing trade enterprise in Luxi, it has a long-term inventory of more than 10,000 tons, and its inventory and sales volume rank the first among similar enterprises across the country. Long-term with a variety of seamless steel tubes, high pressure boiler tubes, fluid pipes, structural tubes, fertilizer tubes and Germany and the United States, Italy imports of alloy steel and other micro smaller. But for thick-walled finish, it is brighter than hot-rolled seamless pipe. At the same time there are still incision in the surface of the pipe, there is not too much obvious rough phenomenon, caliber is not too much burr. Despite the differences, but in the use, are to serve the community to facilitate people's lives.