Seamless steel pipe is made from ingots or solid billets that are perforated to form a burr tube, and then hot rolled, cold rolled or cold dialed. 45 seamless steel pipe is one of the materials of steel and is a high quality carbon structural steel, which is used by a large number of mold production companies to make mold steel. Seamless steel pipe is made of high quality carbon steel or alloy steel and is available in hot rolled and cold rolled (drawn). Welded steel pipe is rolled into a tube-shaped steel plate to butt or spiral seam welding, in the manufacturing method, and is divided into low-pressure fluid transmission with welded steel pipe, spiral seam electric welding steel pipe, direct coil welding steel pipe, electric welding pipe, etc.. Seamless steel pipe can be used for various liquid and gas pipelines, etc. Welded pipes can be used for water pipelines, gas pipelines, heating pipelines, etc. From the caliber, <φ76, accounting for 35%, <φ159-650, accounting for 25%. In terms of varieties, 1.9 million tons of general purpose pipes, accounting for 54%; 760,000 tons of petroleum pipes, accounting for 5.7%; 150,000 tons of hydraulic pillar and precision pipes, accounting for 4.3%; 50,000 tons of stainless steel pipes, bearing pipes and automobile pipes, accounting for 1.4%. The raw material for rolling seamless steel pipe is a round pipe billet. The round pipe embryo is cut and processed into a billet of about 1 meter in length by a cutting machine and sent to the furnace for heating by a conveyor belt. The billet is sent to the furnace to be heated at a temperature of about 1200°C. The fuel is hydrogen or acetylene. Temperature control in the furnace is a key issue. After the round billet is discharged from the furnace, it is hollowed out by a pressure piercing machine. The more common perforating machine is the conical roller perforating machine, which has high productivity, good product quality, large perforation and expansion capacity, and can perforate a variety of steel grades. After perforation, the round pipe billet has been three rolls of oblique rolling, continuous rolling or extrusion. After extrusion, the tube should be sized. Sizing machine through the conical drill bit high-speed rotation into the steel embryo perforation, the formation of steel pipe. The inner diameter of the steel pipe is determined by the length of the outer diameter of the sizing machine bit. After sizing, the steel pipe enters the cooling tower and is cooled by water spray, and after cooling, the steel pipe is straightened. Steel pipe is straightened and sent by conveyor belt to the metal flaw detector (or hydraulic test) for internal flaw detection. If there are cracks, bubbles and other problems inside the steel pipe, they will be detected. The steel pipe quality inspection is followed by a strict hand selection. After quality inspection, the steel pipe is sprayed with paint with number, specification, production lot number, etc. and lifted into the warehouse by crane. Specification: The specification of seamless steel pipe is expressed by the number of millimeters of outer diameter * wall thickness. φ:756MM; wall thickness: 100MM or less

Classification of seamless steel pipe: Seamless steel pipe is divided into two categories: hot rolled and cold rolled (dialed) seamless steel pipe.

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Tramadol Buying Online Legal Seamless steel pipe execution standards

Structural steel pipe GB/T8162-99 Oil drilling steel pipe YB528-65 Fluid steel pipe GB/T8163-99

Marine steel pipe GB5312-85 medium-pressure boiler steel pipe GB/T3087-99 petroleum jacket steel pipe API5CT

Geological drilling steel pipe YB235-70 Automotive semi-axial steel pipe GB3088-8 Chemical fertilizer steel pipe GB6479-86 Hydraulic pillar steel pipe GB173-98 Petroleum cracking steel pipe GB9948-88 Pipeline steel ASTMA53B/106B/API 5L B High-pressure boiler steel pipe DIN17175 ST45.8-Ⅲ GB5310-95 20G

Ordering Tramadol From India Seamless steel pipe is rolled from solid billets after perforation.

Hot-rolled seamless 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, etc. Cold rolled (dialed) seamless 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, other steel pipe, but also includes carbon thin-walled steel pipe, alloy thin-walled steel pipe, stainless thin-walled steel pipe, shaped steel pipe. Hot-rolled seamless steel pipe outer diameter is generally greater than 32mm, wall thickness 2.5-75mm, cold-rolled seamless steel pipe diameter can be up to 6mm, wall thickness can be up to 0.25mm, thin-walled tube outer diameter can be up to 5mm, wall thickness is less than 0.25mm, cold-rolled than hot-rolled high dimensional accuracy.

Order Tramadol Overnight Uk Seamless steel pipe for general use: It is made of 10, 20, 30, 35, 45 and other high quality carbon knotted steel 16Mn, 5MnV and other low alloy structural steel or 40Cr, 30CrMnSi, 45Mn2, 40MnB and other alloy steel hot rolled or cold rolled. 10, 20 and other low carbon steel made of seamless steel pipe is mainly used for fluid transportation pipeline. 45, 40Cr and other medium carbon steel made of seamless steel pipe Used to manufacture mechanical parts, such as cars, tractors of stressed parts. Seamless steel tubes are generally used to ensure strength and crush test. Hot-rolled steel pipe is delivered in hot-rolled condition or heat-treated condition; cold-rolled is delivered in heat-treated condition. Seamless steel tubes for low and medium pressure boilers: used for manufacturing various low and medium pressure boilers, superheated steam tubes, boiling water tubes, water-cooled wall tubes and superheated steam tubes for locomotive boilers, large smoke tubes, small smoke tubes and arch brick tubes, etc. Hot-rolled or cold-rolled (dialed) seamless steel tubes made of high-quality carbon structural steel. Mainly made of 10, 20 gauge steel, in addition to ensuring the chemical composition and mechanical properties to do the hydraulic test, rolled edge, flaring, flattening and other tests. Hot-rolled to hot-rolled state delivery, cold-rolled (dial) to heat treatment state delivery. High-pressure boiler steel pipe: mainly used to manufacture high-pressure and above-pressure steam boiler pipes with high-quality carbon structural steel, alloy structural steel and stainless heat-resistant steel seamless steel pipe, these boiler tubes are often in high temperature and high pressure work, the tube in the role of high-temperature flue gas and water vapor will also be oxidation and corrosion, so the steel pipe is required to have a high lasting strength, high oxidation resistance, and has good organizational Stability, the use of steel grades are: high-quality carbon structural steel grades 20G, 20MnG, 25MnG; alloy structural steel grades 15MoG, 20MoG, 12CrMoG, 15CrMoG, 12Cr2MoG, 12CrMoVG, 12Cr3MoVSiTiB, etc.; rust heat-resistant steel commonly used 1Cr18Ni9, 1Cr18Ni11Nb 1Cr18Ni11Nb high-pressure boiler tube in addition to ensure the chemical composition and mechanical properties, to do the hydraulic test one by one, to make the flaring, flattening test. Steel tube to heat treatment state delivery. In addition, the finished steel pipe microstructure, grain size, decarburization layer also have certain requirements.

Buying Tramadol Online Seamless steel pipe for geological drilling and petroleum drilling: To find out the underground rock structure, groundwater, oil, natural gas and mineral resources, drilling rigs are used to drill wells. Oil and natural gas extraction is even more inseparable from drilling, and seamless steel pipes for geological drilling and oil drilling are the main equipment for drilling, mainly including core outer pipe, core inner pipe, casing, drill pipe, etc. As the pipe for drilling has to work deep into the stratigraphic depth of several thousand meters, the working conditions are extremely complicated, and the drill pipe is subjected to stresses such as tension, pressure, bending, torsion and unbalanced impact load, as well as mud and rock abrasion, so the pipe must have sufficient strength, hardness, wear resistance and impact toughness. (geological Hanyu Pinyin prefix) plus the number one represents the steel yield point, commonly used steel number DZ45 45MnB, 50Mn; DZ50 40Mn2, 40Mn2Si; DZ55 40Mn2Mo, 40MnVB; DZ60 40MnMoB, DZ65 27MnMoVB. steel tubes are delivered in heat-treated condition. Petroleum cracking pipe: Seamless steel pipe for furnace pipe, heat exchanger pipe and pipeline in petroleum refineries. Commonly used high-quality carbon steel (10, 20), alloy steel (12CrMo, 15CrMo), heat-resistant steel (12Cr2Mo, 15Cr5Mo), stainless steel (1Cr18Ni9, 1Cr18Ni9Ti) manufacturing. In addition to the chemical composition and various mechanical properties of the steel pipe, but also to ensure the hydraulic pressure, flattening, flaring and other tests, and surface quality and non-destructive testing. Steel tubes are delivered in heat-treated condition. Stainless steel pipe: with a variety of stainless steel hot-rolled, cold-rolled stainless steel pipe, widely used in petroleum, chemical equipment pipelines and various uses of stainless steel structural parts, in addition to the chemical composition and mechanical properties should be guaranteed, where used to withstand fluid pressure of the steel pipe to ensure that the hydraulic test qualified. A variety of special steel pipe to ensure the conditions as specified.