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October 13, 2021
Stainless steel pipes are divided into ordinary carbon steel pipes, high-quality carbon structural steel pipes, alloy structural pipes, alloy steel pipes, bearing steel pipes, stainless steel pipes, and bimetal composite pipes, plating and coating pipes to save precious metals and meet special requirements. . There are many types of stainless steel pipes, their uses are different, their technical requirements are different, and their production methods are also different. The currently produced steel pipes have an outer diameter range of 0.1-4500mm and a wall thickness range of 0.01-250mm. In order to distinguish its characteristics, steel pipes are usually classified as follows. […]
October 13, 2021
Seamless carbonsteel pipe is a capillary tube made of steel ingots or solid tube blanks through perforation, and then made by hot rolling, cold rolling or cold drawing. Seamless carbon steel pipes have an important position in my country’s steel pipe industry. According to incomplete statistics, there are more than 240 seamless carbon steel pipe production enterprises in my country, and more than 250 seamless carbon steel pipe units, with an annual production capacity of about 4.5 million tons. In terms of caliber, those with <φ76 accounted for 35%, and those with <φ159-650 accounted for 25%. In terms of varieties, […]
October 13, 2021
3LPE/2LPE coating, PE is the abbreviation for polyethylene. The coating is made of hot-melt epoxy powder (FBE) as the bottom layer (2LPE epoxy powder without a bottom layer), vinyl copolymer adhesive (AD) as the middle layer, and high-density polyethylene (PE) as the surface layer The three-layer structure anti-corrosion coating. This structure mainly perfects the high adhesion, oxidation resistance, chemical corrosion resistance and excellent cathodic stripping resistance of FBE and the moisture resistance, aging resistance, insulation and mechanical damage resistance of high-density polyethylene/propylene. integrate. This kind of anti-corrosion layer has many advantages such as strong adhesion to the surface of the […]
October 13, 2021
Casings are steel pipes that support the walls of oil and gas wells. Each well uses several layers of casing according to different drilling depths and geological conditions. Cement is used to cement the well after the casing is run down. It is different from tubing and drill pipe and cannot be reused. It is a one-time consumable material. Therefore, casing consumption accounts for more than 70% of all oil well pipes. Casings can be divided into pipes, surface casings, technical casings and oil casings according to their usage. E235 is a common material for seamless pipes for hydraulic cylinders […]
July 14, 2021
According to API Spec 5CT1988, there are 10 types of casing steel grades, including H-40, J-55, K-55, N-80, C-75, L-80, C-90, C-95, P-110, and Q-125.Casing shall be supplied with threads and couplings, or in one of the following pipe end forms: flat end, round thread with or without couplings, partial trapezoid thread with or without couplings, straight thread, special end work, sealing ring construction.According to SY/T6194-96, domestic casing should be tied with steel wire or steel belt.The exposed part of each sleeve and coupling thread shall be screwed with a guard ring to protect the thread. Specification range: OD: 114.3mm-508mm […]
July 14, 2021
Oil casing is mainly used to support the well wall during drilling and after completion, so as to ensure the normal operation of the drilling process and the whole well after completion, and it is the lifeline to maintain the operation of the oil well.Due to different geological conditions, complex downhole stress state, tensile, compression, bending and torsional stresses on the pipe body, so the quality of oil casing itself is higher.The casing itself is also required to be corrosion resistant in corrosive environments.In complex geological conditions, casing is also required to have anti-crush performance.Casing can be divided into: conduit, […]
July 14, 2021
Oil casing, also called special oil pipe, is mainly used for drilling oil and gas well and transporting oil and gas.It includes oil drilling pipe, oil casing, pumping pipe.The oil drill pipe is used to connect the drill collars to the drill bit and transmit drilling power. Oil casing is mainly used to support the borehole wall during drilling and after completion to ensure the drilling process and the normal operation of the whole well after completion.The extraction pipe mainly carries the oil and gas from the bottom of the well to the surface.Oil casing is the lifeblood of oil […]
July 14, 2021
Internal and external burr of ERW steel tube.Due to the continuous improvement and perfection of the structure of the burr system and the cutting tool, the burr of the large and medium caliber steel pipe has been better treated.The burr can be controlled in -0.2mm ~ 0.5mm.Physical seamless refers to the difference between the metallographic structure inside the weld and the base metal, which results in the decrease of the mechanical properties of the weld area. It is necessary to take measures to make it uniform and consistent.The high frequency welding thermal process of ERW steel tube causes the temperature […]
July 14, 2021
How to make EWR tube? The iron is first flattened, then placed in a roll to form a tube and passed through a welded electrode made from a copper plate connected to a rotary transformer.When the electrode touches each side, the temperature rises to the weld point.Once the tube leaves the electrode, the inner flash is removed by hammering the tube and the outer flash is removed by cutting the tool.The surface finish may be bare or coated. ERW Steel Tube Quality: Before reaching the market, ERW steel tubes and pipes pass a number of tests, including hydrostatic tests, ultrasonic […]
July 14, 2021
The API 5L specification provides standards for pipelines used to carry natural gas, water, and petroleum in the natural gas and petroleum industry.API 5L covers seamless and welded steel pipe lines.It includes ordinary pipe, threaded pipe and flared pipe, as well as straight through pipe (TFL), and end pipe prepared for use with special joints.Pipes that meet ASTM106 Class A or B standards are not interchangeable with API 5L.More stringent requirements for API 5L X rating;The rolling grade is unacceptable and rework is not allowed.In addition, special attention was paid to sour service and toughness and toughness testing for higher […]
July 14, 2021
A106 seamless steel pipe belongs to the American standard seamless steel pipe, the material is ordinary carbon steel series.A106 includes A106-A and A106-B.The former is equivalent to the domestic 10# material, the latter is equivalent to the domestic 20# material.It belongs to ordinary carbon steel series and is one of the commonly used materials.Suitable for high pressure pipe, equivalent to the domestic 20G high pressure boiler pipe. With API 5 l pipeline steel seamless steel tube technology development and forming, the progress of technology, the application range of the API 5 l pipe seamless pipe in gradually expanding, especially in […]
July 14, 2021
With the development of API 5L Gr.B seamless steel pipe technology, molding and technological progress, the application scope of API 5L seamless steel pipe is gradually expanding, especially in the API 5L large-diameter pipeline steel seamless steel pipe advantage is more obvious, plus the cost factor, API 5L seamless steel pipe pipe has occupied the leading position in the field of pipeline steel pipe.API 5L Pipeline Steel Seamless Tube Development. API 5L Gr.B Seamless Steel Tube: 1) Standard: API5L ASTM ASME B36.10DIN 2) material: API5LGr. B A106Gr. B, A105Gr. B, A53Gr. B, A243WPB, etc. 3) Outside diameter: 13.7mm-1219.8mm 4) Wall […]
July 14, 2021
The greatest advantage of Alloy Steel Pipe is that it can be recycled 100%, which is in line with the national strategy of environmental protection, energy saving and resource saving. The national policy encourages the expansion of the application field of high pressure Alloy pipe.At present, the proportion of China’s alloy pipe consumption in the total steel is only half of the developed countries, the expansion of the use of alloy pipe field to provide a broader space for the development of the industry.According to the research of the expert group of alloy pipe branch of China Association of Special […]
July 14, 2021
API 5L Gr.B seamless steel pipe production process, generally used seamless pipe:It is made of 10, 20, 30, 35, 45 carbon bond steel 16Mn, 5MnV and other low alloy structural steel or 40Cr, 30CrMnSi, 45Mn2, 40MnB and other alloy steel hot rolled or cold rolled, American standard API5L Gr.B seamless steel pipe GB 20# seamless steel pipe.10, 20 and other low carbon steel seamless pipe is mainly used for fluid delivery pipeline.45, 40Cr and other medium carbon steel seamless pipe made of seamless pipe to manufacture mechanical parts, the American standard seamless steel pipe, API5L American standard seamless steel pipe […]
July 14, 2021
ASTM A106 seamless steel pipe belongs to the United States standard steel pipe, A106 includes A106-A, A106-B.The former is equivalent to the domestic 10# material, the latter is equivalent to the domestic 20# material.It belongs to ordinary carbon steel series and is one of the commonly used materials.ASTM A106 seamless steel tube includes two processes: cold drawing and hot rolling.In addition to the production process, the two are different in precision, surface quality, minimum size, mechanical properties, and organizational structure.Widely used in petroleum, chemical, boilers, power stations, ships, machinery manufacturing, automotive, aviation, aerospace, energy, geology, construction and military industries and […]