6m-12m A106B Carbon Steel Seamless Pipe 20# GB/T8163-2018 Standard

     ASTM A106B 20# Carbon Steel Seamless Steel Pipe Price Concessions Quality Assurance

       Carbon steel seamless steel pipe is a kind of long steel. The steel pipe has a hollow cross-section and is widely used as a pipeline for conveying fluids, such as pipelines for conveying oil, natural gas, gas, water and some solid materials. Compared with solid steel such as round steel, steel pipe has the same bending and torsional strength and is lighter in weight. It is a kind of economic cross-section steel, widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipe, automobile transmission shaft, bicycle frame and steel scaffolding used in construction.

      The manufacture of ring parts with steel pipes can improve the utilization rate of materials, simplify the manufacturing process, save materials and processing time, such as rolling bearing rings, jack sleeves, etc., which have been widely used to manufacture steel pipes.

      Steel pipe is an indispensable material for all kinds of conventional weapons, and the barrel and barrel are made of steel pipe. Steel pipes can be divided into round pipes and special-shaped pipes according to the different shapes of the cross-sectional area. Because the circular surface volume is the largest under the condition of equal circumference, more fluid can be transported with circular tubes. In addition, when the annular section is subjected to internal or external radial pressure, the force is more uniform, so the vast majority of steel pipes are round pipes.

     The use of steel pipe to manufacture ring parts can improve the utilization rate of materials, simplify the manufacturing process, save materials and processing hours, such as rolling bearing rings, jack sleeves, etc., currently has been widely used to manufacture steel pipes

     a106b belongs to the American standard seamless steel pipe and China 20# standardAccording to different production methods, a106b can be divided into hot rolled pipe, cold rolled pipe, cold drawn pipe, extrusion pipe, etc.

      Carbon steel pipe can be divided into seamless steel pipe, straight seam steel pipe, spiral steel pipe, high-frequency welding steel pipe and so on. The raw material of rolled seamless carbon steel pipe is a round tube blank, and the round tube embryo is cut by the cutting machine and the growth of the blank is about 1 meter, and is sent to the furnace by the conveyor belt for heating. The billets are heated in a furnace at a temperature of about 1200 degrees Celsius. The fuel is hydrogen or acetylene. The temperature control in the furnace is the key problem. After the round tube billet is released, it must be perforated by the pressure piercing machine. Generally, the most common piercing machine is the conical roll piercing machine, which has high production efficiency, good product quality, large perforating and expanding diameter, and can wear a variety of steel. After the perforation, the round tube blank is successively rolled by three roller skew, continuous rolling or extrusion. After extrusion, the tube should be removed for sizing. The sizing machine rotates into the steel embryo at high speed through the conical drill to punch holes and form the steel pipe. The inner diameter of the steel pipe is determined by the outer diameter length of the caliper drill bit. After the steel pipe is calibrated, it enters the cooling tower and is cooled by water spray. After the steel pipe is cooled, it will be straightened. After the steel pipe is straightened, it is sent to the metal inspection machine (or hydraulic test) for internal inspection. If there are cracks, bubbles and other problems inside the steel pipe, it will be detected. After the steel pipe inspection, it is also strictly selected by hand. After the steel pipe quality inspection, paint the number, specification, production batch number, etc. And hoisted by crane into the warehouse.

Cold drawing (rolling) carbon steel seamless steel pipe: the circular tube billet - heat - punch to heading, annealing and pickling to apply oil (copper), multi-channel time cold drawing (cold rolled) to the tube billet - heat treatment - straightening, hydrostatic test (NDT) - > tag to put in storage

Carbon steel seamless steel pipe because of its different manufacturing process, and is divided into hot rolled (extrusion) seamless steel pipe and cold drawn (rolled) seamless steel pipe two kinds. Cold drawn (rolled) pipe is divided into two kinds: round pipe and shaped pipe.

In addition, There are also GB/T17396-1998(hot-rolled seamless steel pipe for hydraulic support), GB3093-1986(high-pressure seamless steel pipe for diesel engine), GB/T3639-1983(cold-drawn or cold-rolled precision seamless steel pipe), GB/T3094-1986(cold-drawn seamless steel pipe shaped steel pipe), GB/T8713-1988 (Precision inner diameter seamless steel pipe for hydraulic and pneumatic cylinders), GB13296-1991(stainless steel seamless steel pipe for boilers and heat exchangers), GB/T14975-1994(stainless steel seamless steel pipe for structures), GB/T14976-1994(stainless steel seamless steel pipe for fluid transport)GB/T5035-1993(automotive half Sleeve pipe seamless steel pipe), API SPEC5CT-1999(casing and tubing specification), etc.