A106B A53 S45C A333GR.6 thick wall steel pipe quality assurance

The production process of thick-walled seamless steel pipes can be divided into four basic methods: cold drawing, cold rolling, hot rolling, and thermal expansion. Uses are divided into seamless steel pipes for structure; seamless steel pipes for transportation; seamless steel pipes for boilers; high-pressure seamless steel pipes for boilers; high-pressure seamless steel pipes for fertilizer equipment; seamless steel pipes for geological drilling; seamless steel pipes for oil drilling; Seamless steel pipes for petroleum cracking; seamless steel pipes for ships; cold-drawn cold-rolled precision seamless steel pipes; various alloy pipes. Seamless steel pipes are expressed in terms of outer diameter and wall thickness. Thick-walled seamless steel pipes are mainly used for machining, coal mines, hydraulic steel, and many other purposes. Hot-rolled thick-walled seamless steel pipes, cold-rolled thick-walled seamless steel pipes, cold-drawn thick-walled seamless steel pipes, extruded thick-walled seamless steel pipes, and stainless steel seamless steel pipes for pipe jacking structures (GB/T14975-2002) are used for Seamless steel pipes of general structure and mechanical structure are widely used in the hot-rolled (extruded, expanded) and cold-rolled (extruded, expanded) and cold-rolled stainless steel of corrosion-resistant pipes and structural parts and parts in the chemical, petroleum, textile, medical, food, machinery and other industries. Drawing (rolling) seamless steel tubes. Stainless steel seamless steel pipes for fluid transportation (GB/T14976-2002) are general seamless steel pipes used to transport water, oil, gas and other fluids. They are usually hot-rolled (extruded, expanded) and cold drawn (rolled) made of stainless steel. ) Seamless steel pipe. Shaped seamless steel pipe is a general term for seamless steel pipes with cross-sectional shapes other than round pipes. According to the different shape and size of the steel pipe section, it can be divided into equal wall thickness special-shaped seamless steel pipe (code D), unequal wall thickness special-shaped seamless steel pipe (code BD), variable diameter special-shaped seamless steel pipe (code BJ). Special-shaped seamless steel pipes are widely used in various structural parts, tools and mechanical parts. Compared with round pipes, special-shaped pipes generally have larger moments of inertia and section modulus, and have greater bending and torsion resistance, which can greatly reduce structural weight and save steel. Seamless steel pipe for structure (GB/T8162-2008) is a seamless steel pipe used for general structure and mechanical structure. Seamless steel pipe for fluid transportation (GB/T8163-2008) is a general seamless steel pipe used to transport water, oil, gas and other fluids. Seamless steel pipes for low and medium pressure boilers (GB3087-2008) are used to manufacture superheated steam pipes, boiling water pipes for low and medium pressure boilers of various structures and superheated steam pipes for locomotive boilers, large smoke pipes, small smoke pipes and arched brick pipes. High-quality carbon structural steel hot-rolled and cold-drawn (rolled) seamless steel tubes. Seamless steel pipes for high-pressure boilers (GB5310-2008) are high-quality carbon steel, alloy steel and stainless heat-resistant steel seamless steel pipes for the heating surface of water-tube boilers with high pressure and above. High-pressure seamless steel pipes for fertilizer equipment (GB6479-2000) are high-quality carbon structural steel and alloy steel seamless steel pipes suitable for chemical equipment and pipelines with a working temperature of -40 to 400 ℃ and a working pressure of 10 to 30 Ma. Seamless steel pipes for petroleum cracking (GB9948-2006) are seamless steel pipes suitable for furnace tubes, heat exchangers and pipelines in petroleum refineries. Steel pipes for geological drilling (YB235-70) are steel pipes used for core drilling by geological departments. They can be divided into drill pipes, drill collars, core pipes, casing pipes and sedimentation pipes according to their uses. Seamless steel pipes for diamond core drilling (GB3423-82) are seamless steel pipes for drill pipes, core rods, and casings used for diamond core drilling. Petroleum drilling pipe (YB528-65) is a seamless steel pipe that is thickened inside or outside at both ends of oil drilling. Steel pipes are divided into two types: wire and non-wired. Wired pipes are connected by joints, and non-wired pipes are connected with tool joints by butt welding. Carbon steel seamless steel pipes for ships (GB5213-85) are carbon steel seamless steel pipes used in the manufacture of Class I pressure piping systems, Class II pressure piping systems, boilers and superheaters. The working temperature of the carbon steel seamless steel pipe wall does not exceed 450℃, and the working temperature of the alloy steel seamless steel pipe wall exceeds 450℃. Seamless steel pipes for automobile axle sleeves (GB3088-82) are high-quality carbon structural steel and alloy structural steel hot-rolled seamless steel pipes used in the manufacture of automobile axle sleeves and axle tubes of drive axle housings. High-pressure oil pipes for diesel engines (GB3093-86) are cold-drawn seamless steel pipes used to manufacture high-pressure pipes for diesel engine injection systems. Precision inner diameter seamless steel pipes for hydraulic and pneumatic cylinders (GB8713-88) are cold-drawn or cold-rolled precision seamless steel pipes with precise inner diameters for the manufacture of hydraulic and pneumatic cylinders. Cold-drawn or cold-rolled precision seamless steel pipe (GB3639-83) is a cold-drawn or cold-rolled precision seamless steel pipe used for mechanical structures and hydraulic equipment with high dimensional accuracy and good surface finish. The use of precision seamless steel pipes to manufacture mechanical structures or hydraulic equipment can greatly save machining man-hours, increase material utilization, and at the same time help improve product quality.

Products Details

Description

Alloy steel pipe is mainly used for high-pressure and high-temperature pipelines and equipment such as power plant, nuclear power, high-pressure boiler, high-temperature superheater and reheater. It is made of high-quality carbon steel, alloy structural steel and stainless heat-resistant steel through hot rolling (extrusion, expansion) or cold rolling (drawing). The biggest advantage of alloy steel pipe is that it can be recycled 100%, which is in line with the national strategy of environmental protection, energy conservation and resource conservation. The national policy encourages the expansion of the application field of high-pressure alloy pipe. At present, the consumption of alloy tubes in China accounts for only half of the total steel in developed countries. The expansion of the application field of alloy tubes provides a broader space for the development of the industry. According to the research of the expert group of alloy pipe branch of China Special Steel Association, the demand for high-pressure alloy pipe length in China will increase by 10-12% annually in the future. Alloy pipe is defined as steel pipe according to the production material (i.e. material). As the name suggests, it is a pipe made of alloy; Seamless pipe is defined according to the production process of steel pipe (seamless seam). What is different from seamless pipe is seamless pipe, including straight seam welded pipe and spiral pipe.

The materials of alloy pipes are roughly as follows

16-50Mn 27SiMn 40Cr 12-42CrMo 16Mn 12Cr1MoV T91 27SiMn 30CrMo 15CrMo 20G

Introduction to alloy steel pipe

Alloy pipes have hollow sections and are widely used as pipelines for transporting fluids, such as pipelines for transporting oil, natural gas, gas, water and some solid materials. Compared with solid steel such as round steel, alloy steel pipe has lighter weight when its bending and torsional strength is the same. Alloy steel pipe is an economic section steel, which is widely used to manufacture structural parts and mechanical parts, such as oil drill pipe, automobile transmission shaft, bicycle frame and steel scaffold used in construction. Making ring parts with alloy steel pipe can improve the material utilization rate, simplify the manufacturing process, save materials and processing hours, such as rolling bearing ring, jack sleeve, etc. at present, steel pipe has been widely used for manufacturing. Alloy steel pipe is also an indispensable material for all kinds of conventional weapons. Gun barrel and barrel should be made of steel pipe. Alloy steel pipe can be divided into round pipe and special-shaped pipe according to different cross-sectional area and shape. Because the circular area is the largest under the condition of equal circumference, more fluid can be transported by circular pipe. In addition, when the ring section is subjected to internal or external radial pressure, the force is more uniform. Therefore, most steel pipes are round pipes.Cr9Mo 10CrMo910 15Mo3 15CrMoV 35CrMoV 45CrMo  15CrMoG 12CrMoV 45Cr 50Cr 45crnimo et al.

Contact us

Please feel free to give your inquiry in the form below We will reply you in 24 hours