20 seamless steel pipe prices, the number of seamless quotes

Price, GB, quotes, factory, distribution, import, tax, Tel: 0635-6186766 Mobile: 13561220411 E-mail: lcggjx@163.com 1.1 nominal pipe outside diameter 88.9mm, nominal wall thickness of 6.45mm. 1.2 pipe diameter and wall thickness tolerances shall comply with the requirements in Table 1. Table outer diameter tolerance + 0.50mm -0.20mm thickness tolerance + 0.97mm -0.77mm 2 steel pipe is generally the length of 9400mm ~ 9750mm. 3 curved shape of the pipe shall not exceed 3.1 1.0mm / m. 3.2 pipe ends face should be perpendicular to the axis of the steel pipe, cut burr should be removed. 4 weight steel pipe according to the actual weight delivery, also by theoretical weight delivery. Steel theoretical weight per meter of 13.115kg / m. 5. The chemical composition of finished steel tolerances shall comply with the relevant provisions of GB / T 222's. 6. Delivery status steel with hot-rolled state delivery. 7. The mechanical properties after appropriate heat treatment, the mechanical properties of steel should reach grade requirements of API SPEC 5CT N80. 8. Density of steel by the root should be eddy current inspection to verify the density of steel, eddy current testing comparative sample through-hole diameter artificial defects φ2.2mm ± 0.01mm. As an important part of the pipe steel products, used in its manufacturing process and is divided into different seamless tube shape (round billet) and welded (plate, strip) two categories. 3 Categories edit hot and cold rolled seamless steel pipe points (written) seamless steel categories. Hot-rolled seamless steel pipe generally sub, low, medium pressure boiler pipe, high pressure boiler pipe, steel pipe, stainless steel pipe, oil cracking pipe, steel and other steel and other geological. Cold-rolled (allocated) Subject to sub-general seamless steel pipe, low pressure boiler pipe, high pressure boiler pipe, steel pipe, stainless steel pipe, oil cracking pipe, the other steel, but also includes carbon thin-walled steel, alloy thin steel, walled stainless steel, special steel pipe. Hot-rolled seamless pipe diameter is generally greater than 32mm, wall thickness 2.5-75mm, cold-rolled seamless steel pipe at the path can go to 6mm, wall thickness can be 0.25mm, outer diameter thin-walled tube to 5mm, thickness less than 0.25mm, cold-rolled high dimensional accuracy than hot. General seamless steel pipe: is 10,20,30,35,45 and other high quality carbon steel 16Mn, 5MnV low-alloy structural steel or 40Cr, 30CrMnSi, 45Mn2,40MnB other alloy steel hot-rolled or cold-rolled steel. 10,20 and other low-carbon steel seamless pipe is mainly used for fluid pipes. 45,40Cr etc. made of carbon steel seamless pipe used to manufacture mechanical parts, such as cars, tractors and the force components. General seamless steel pipes to ensure the strength and flattening test. Hot-rolled steel hot-rolled state or heat treatment delivery; cold to heat treatment delivery. Low-pressure boiler seamless steel pipe: for the manufacture of a variety of low and medium pressure boiler superheated steam pipes, boiling water pipe, water wall tubes and superheated steam locomotive boiler tubes, opium pipe, small pipe and brick arch tubes. (Allocated) seamless quality carbon structural steel hot or cold. 10,20 steel is mainly used, in addition to chemical composition and mechanical properties outside pressure to do testing, crimping, flaring, flattening and other tests. State of delivery hot rolled, cold-rolled (allocated) to heat treatment delivery. High pressure boiler pipe: mainly used to manufacture high pressure steam boiler and above pipelines with high-quality carbon steel, alloy steel and heat-resistant stainless steel seamless steel tubes, boiler tubes often at a high temperature and high pressure work, tubes at high temperature flue gas and water vapor action will occur oxidation and corrosion, thus requiring durable steel with high strength, high oxidation resistance, and good organizational stability, the use of steel are: high quality carbon structural Steel steel are 20G, 20MnG, 25MnG; alloy steel steel 15MoG, 20MoG, 12CrMoG, 15CrMoG, 12Cr2MoG, 12CrMoVG, 12Cr3MoVSiTiB like; rust resistant steel used high-pressure boiler tube 1Cr18Ni9,1Cr18Ni11Nb addition to chemical composition and mechanical properties , hydrostatic testing done by the root, to be flaring, flattening test. Steel to heat treatment delivery. In addition, finished steel microstructure, grain size, decarburization there are certain requirements. Geological drilling and oil drilling seamless: In order to investigate underground rock structures, underground water, oil, gas and mineral resources, the use of drilling rigs. Oil and gas exploration can not do without drilling, geological drilling seamless steel tubes for oil drilling is the main drilling equipment, including the core outer tube, core pipe, casing, drill pipe and so on. Since the drilling pipe several kilometers deep into the ground to a depth of work, working conditions extremely complex, drill subjected to tensile, compression, bending, twisting and uneven stress impact loads, etc., but also by mud, rock abrasion and therefore requires pipe must have sufficient strength, hardness, wear resistance and toughness, steel pipe with "DZ" (geology Pinyin prefix) plus the number of a representative of the yield point of steel, said steel are commonly used DZ45 of 45MnB, 50Mn; DZ50 The 40Mn2,40Mn2Si; DZ55 of 40Mn2Mo, 40MnVB; DZ60 of 40MnMoB, DZ65 of 27MnMoVB. All steel to heat treatment delivery. Oil cracking tube: for oil refinery furnace tubes, heat exchanger tubes and seamless pipes. Common quality carbon steel (10, 20), steel (12CrMo, 15CrMo), heat-resistant steel (12Cr2Mo, 15Cr5Mo), stainless steel (1Cr18Ni9,1Cr18Ni9Ti) manufacturing. In addition to the chemical composition of steel was certified and a variety of mechanical properties, but also to ensure the water pressure, flattening, flaring and other tests, and surface quality and non-destructive testing. In the heat treatment of steel delivery status. Stainless steel pipe: using a variety of stainless steel hot-rolled, cold-rolled stainless steel, widely used in stainless steel structural components in petroleum, chemical equipment, pipeline and various uses shall, in addition to chemical composition and mechanical properties, where steel is used to withstand the fluid pressure To ensure the water pressure test pass. According to the provisions of various special steel guarantee conditions. 4 Run the standard editing 1, structure seamless steel pipe: GB8162-2008 2, transmission fluid pipe joints sites: GB8163-20083, boiler seamless pipe: GB3087-2008 4, high-pressure boiler seamless pipe: GB5310-2008 (ST45 .8-Ⅲ type) 5, fertilizers, equipment, high pressure seamless steel pipe: GB6479-1999 6, geological drilling seamless: YB235-70 7, oil drilling seamless: YB528-65 8, petroleum cracking seamless steel pipe: GB9948-88 9, oil drill collar of specialized seamless pipes: YB691-70 10, car axle seamless steel pipe: GB3088-1999 11, ships with seamless: GB5312-1999 12, cold drawn precision cold-rolled non- seam steel pipe: GB3639-1999 13, all kinds of alloy pipe 16Mn, 27SiMn, 15CrMo, 35CrMo, 12CrMov, 20G, 40Cr, 12Cr1MoV, 15CrMo In addition, GB / T17396-1998 (hydraulic pillar seamless hot-rolled), GB3093 -1986 (diesel engine with high-pressure seamless steel pipe), GB / T3639-1983 (cold drawn or cold rolled precision seamless steel pipe), GB / T3094-1986 (cold drawn seamless steel pipe shaped), GB / T8713-1988 (hydraulic and pneumatic cylinder with precision diameter seamless steel tubes), GB13296-1991 (boiler, heat exchanger with stainless steel seamless pipe), GB / T14975-1994 (structure seamless stainless steel), GB / T14976-1994 (fluid transport stainless steel Seamless Steel Tube) GB / T5035-1993 (automobile axle casing seamless steel pipe), API SPEC5CT-1999 (casing and tubing specification) and the like.