Classification of carbon steel pipes
Carbon steel pipe is divided into two categories: hot-rolled and cold-rolled (drawn) steel pipes. Hot-rolled carbon steel pipe is divided into general steel pipe, low and medium-pressure boiler steel pipe, high-pressure boiler steel pipe, alloy steel pipe, stainless steel pipe, petroleum cracking pipe, geological steel pipe, and other steel pipes. In addition to general steel pipes, low and medium-pressure boiler steel pipes, high-pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, and other steel pipes, cold-rolled (dial) carbon steel pipes also include carbon thin-walled steel pipes, alloy thin-walled steel pipes, Stainless thin-walled steel pipe, special-shaped steel pipe. The outer diameter of hot-rolled seamless pipes is generally greater than 32mm, and the wall thickness is 2.5-75mm. The outer diameter of cold-rolled seamless pipes can reach 6mm and the wall thickness can reach 0.25mm. The outer diameter of thin-walled tubes can reach 5mm and the wall thickness is less than 0.25mm. Cold rolling has higher dimensional accuracy than hot rolling.
General carbon steel pipe: It is made of 10, 20, 30, 35, 45, and other high-quality carbon steel 16Mn, 5MnV, and other low-alloy structural steel or 40Cr, 30CrMnSi, 45Mn2, 40MnB, and other alloy steel hot-rolled or cold-rolled. Seamless pipes made of low carbon steel such as 10 and 20 are mainly used for fluid transportation pipelines. 45, 40Cr, and other medium carbon steel seamless pipes are used to manufacture mechanical parts, such as the stressed parts of automobiles and tractors. Generally, carbon steel pipe is used to ensure the strength and flattening test. Hot-rolled steel pipes are delivered in a hot-rolled or heat-treated state; cold-rolled steel pipes are delivered in a heat-treated state. The above is the classification of carbon steel pipes.
Making of carbon steel pipe
The raw material of carbon steel pipe is a round tube blank, which is cut by a cutting machine into a blank with a length of about 1 meter, and sent to a furnace for heating through a conveyor belt. The billets are fed into the furnace and heated at about 1200 degrees Celsius. The fuel is hydrogen or acetylene. The temperature control in the furnace is a key issue. After the round tube blank is released from the furnace, it must be pierced by a pressure piercer. Generally, the more common punching machine is the conical roller punching machine. This kind of punching machine has high production efficiency, good product quality, a large amount of perforation and diameter expansion, and can wear a variety of steel grades.
After perforation, the round tube blank is successively cross-rolled, continuously rolled, or extruded by three rolls. After extrusion, the tube should be removed and sized. The sizing machine rotates into the steel billet at high speed through the conical drill bit to make holes to form carbon steel pipe. The inner diameter of the steel pipe is determined by the outer diameter of the drill bit of the sizing machine. After the steel pipe sizes, it enters the cooling tower and is cooled by water spray. After the carbon steel pipe is cooled, it will be straightened. After straightening, the steel pipe is sent to the metal flaw detector (or hydraulic test) by the conveyor belt for internal flaw detection. If there are cracks, bubbles, and other problems inside the carbon steel pipe, they will be detected. After the steel pipe quality inspection, it must pass strict manual selection. After the quality inspection of carbon steel pipe, the serial number, specification, production batch number, etc. are sprayed with paint. And lifted into the warehouse by crane. The above is making of carbon steel pipe.
Excellent carbon steel pipe supplier
From the above introduction, we can learn about the classification of carbon steel pipes and making of carbon steel pipe. If you want to buy high-quality carbon steel pipes, you are welcome to pay attention to an excellent carbon steel pipe supplier JIANGSU TISCO INDUSTRIAL CO.,LTD. We are a professional manufacturer of various types of steel. The factory has fourteen years of export experience. Welcome to inquire and buy.
JIANGSU TISCO INDUSTRIAL CO.,LTD
Post time: Sep-13-2022