After piling pipe rusty spiral wire brushes and other tools used primarily for steel surface sanding, cleaning and preheat coil can remove loose or warped oxide, rust, welding slag. Hand tools rust can reach Sa2 grade power tools rust Sa3 level can be achieved, if the coil firmly attached to the surface of the oxide scale, the effect is not ideal tools rust, anti-corrosion construction required to reach the depth of anchor pattern.
In traditional applications based on the new application has been added, which makes the usefulness of spiral steel pipe more fruitful, and also reduces the cost of the use of spiral pipe. Radio frequency sensors to provide 200 volts, 50 amps of electricity flowing through spiral pipe flow, experimental samples by induction heating effect.
Coil itself does not get hot, but the experimental samples will be significantly fever. In the heating temperature exceeds arc melting machine, radio frequency sensors will provide more control so that scientists can adjust the specific alloy composition ratio. Strong pressure spiral pipe, plastic, and easy welding and machining molding; generally low pressure liquid delivery spiral submerged arc welded spiral steel pipe (SY5037-83), using double-sided automatic submerged arc welding or welding into the legal system for water, gas, air and steam. Spiral steel pipe market demand both fast growth trend without chaos will not fundamentally changed. Spiral steel pipe market can keep chaos hub depends on the rapid development of changes in demand. Currently, the macroeconomic regulation and control by the policy level, the future will bring some market growth rate slows down.
Wednesday, July 3, 2013
How to avoid large-caliber spiral piling pipe corrosion-resistant
All metals and reaction of oxygen in the atmosphere, the surface oxide film. Unfortunately, in the iron oxide formed on carbon steel proceed oxidation, corrosion continues to expand, forming holes. You can use paint or oxidation-resistant metal (eg, zinc, nickel and chromium) plating to ensure the steel surface, but, as people know, this protection is only a film. If the protective layer is damaged, the following steel began to rust. Large diameter spiral piling pipe corrosion resistance depends on corrosion, corrosion epoxy coal tar is one of the components, so the protection methods vary.
Strengthen the anti-corrosion paint material reaches level, large diameter spiral pipe atmospheric corrosion resistance can significantly increase, but higher strength corrosion, although still improve corrosion resistance, but not obvious. The reason is used for large diameter spiral steel pipe anti-corrosion processing of the processing, the change in the type of surface oxide became similar to the large diameter spiral piling pipe is formed on the surface of the metal oxide. This tight adhesion of large diameter spiral pipe oxide protective surface to prevent further oxidation. This oxide layer is very thin, it can be seen through the large diameter spiral piling pipe natural luster surface, so that large diameter spiral pipe has a unique surface. Moreover, if the surface is damaged, the exposed surface of large diameter spiral pipe and atmospheric reaction to self-repair, re-formation of this oxide "passive film" and continue to play a protective role.
Therefore, all of the large diameter spiral pipe elements have a common characteristic, corrosion prevention of corrosion is the best way.
Strengthen the anti-corrosion paint material reaches level, large diameter spiral pipe atmospheric corrosion resistance can significantly increase, but higher strength corrosion, although still improve corrosion resistance, but not obvious. The reason is used for large diameter spiral steel pipe anti-corrosion processing of the processing, the change in the type of surface oxide became similar to the large diameter spiral piling pipe is formed on the surface of the metal oxide. This tight adhesion of large diameter spiral pipe oxide protective surface to prevent further oxidation. This oxide layer is very thin, it can be seen through the large diameter spiral piling pipe natural luster surface, so that large diameter spiral pipe has a unique surface. Moreover, if the surface is damaged, the exposed surface of large diameter spiral pipe and atmospheric reaction to self-repair, re-formation of this oxide "passive film" and continue to play a protective role.
Therefore, all of the large diameter spiral pipe elements have a common characteristic, corrosion prevention of corrosion is the best way.
Tuesday, July 2, 2013
The damaged form of piling pipe surface film
Piling pipe is formed by the surface layer of very thin and strong stability of fine chromium-rich oxide film (protective film), to prevent the continued infiltration of oxygen atoms, to oxidation, and access to anti-corrosion ability. If there is some reason, this film was the constant destruction, air or liquid oxygen or metal atoms will continue to penetrate the iron atom out from the constant analysis of the formation of loose iron oxide, metal surface corrosion will be constantly. This surface film in the form of a lot of damage, more common in everyday life are summarized as follows:
1 Piling pipe surface deposit product with other metals containing dust particles or heterogeneous metal fixtures in the humid air, and stainless steel fixtures between the condensate, the two together into a micro-battery, causing the electric chemical reactions, protective film is damaged, call it that electrochemical corrosion.
2 Piling pipe surface adhesion organic juice (such as vegetables, soup, sputum, etc.), oxygen in the water case, constitutes organic acids, organic acids long is the corrosion of metal surfaces.
3 Piling pipe surface adhesion with acid, alkali, salts (such as a wall decoration lye, lime splash), causing localized corrosion.
4 In a polluted air (which contain a large number of sulfide, carbon dioxide, nitrogen oxide atmosphere), the case of condensed water to form sulfuric acid, nitric acid, acetic acid solution point, cause chemical corrosion.
1 Piling pipe surface deposit product with other metals containing dust particles or heterogeneous metal fixtures in the humid air, and stainless steel fixtures between the condensate, the two together into a micro-battery, causing the electric chemical reactions, protective film is damaged, call it that electrochemical corrosion.
2 Piling pipe surface adhesion organic juice (such as vegetables, soup, sputum, etc.), oxygen in the water case, constitutes organic acids, organic acids long is the corrosion of metal surfaces.
3 Piling pipe surface adhesion with acid, alkali, salts (such as a wall decoration lye, lime splash), causing localized corrosion.
4 In a polluted air (which contain a large number of sulfide, carbon dioxide, nitrogen oxide atmosphere), the case of condensed water to form sulfuric acid, nitric acid, acetic acid solution point, cause chemical corrosion.
The birth of intelligent oil pipeline
With the increasingly rich variety of telecommunications services, network operators are facing increasing pressure, the pressure of traffic on the one hand, users of P2P applications from the public to provide the HTTP Video ICP applications, are consumed in a large number of operators network resources, and operators can not benefit from it, accompanied by the operators in the industry chain and marginalization continue to be the oil pipeline;. On the other hand, many commercial users a higher SLA requirements, the business-class upgrade from the original to the application level, network operators ability to present difficult to deal with.
It is in this growing challenge, the above situation makes the operators begin to consider how to dig the pipeline value, rather than the traditional, extensive bandwidth management, which is the operator's "smart pipe" power lies, thus, the "smart pipe" concept operational and health, and has been recognized by operators. Sales from the bandwidths of the changes to the intelligent pipe, inspection equipment, first thing to do is not the ability, not outline a vision of end to end, but a deep understanding of the connotation of intelligence pipeline. The word is not an accurate grasp of the smart, you can not have a purpose, a logical implementation of the transition to the intelligent pipe. Interpretation of intelligence, the most direct way is to start from the analysis of their own.
As intelligent beings, human intelligence is reflected in several aspects: First, the ability to learn, this basic capability allows us to continue to get other new capabilities, but also allows us to continue to respond to the new environment and thus the evolution and progress; and we were able to learn the way new knowledge is dependent on vision, hearing, smell and touch capabilities, which is the second ability - the ability to distinguish; Next, the intake of information already, we also have to analyze, collate and present, and presentation skills; Finally, in the brain of control, we will be thinking into action, it is implementation capacity. Intelligent pipe process, in fact, the ability of telecommunications networks is the process: the ability to distinguish, learning ability, analytical ability and implementation capacity.
Smart Pipe is a long, covering many areas of the subject. Technology is only one aspect, but also study how to use the pipeline to achieve intelligent business model transformation and other issues. In these respects, Shanghai Bell have a unique advantage: in Shanghai DemoCenter Alcatel-Lucent is the world's largest demonstration center, provides operators with an open platform for device / service verification, joint testing, in addition, we take full advantage of Alcatel Lang's global information resources and experience: IPTC (IP Transformation Center) is Alcatel-Lucent Research groups focus on IP transformation operators in the various issues facing the organization, including project consulting, transformation roadmap planning, hierarchical implementation, technical verification, has been involved so far include BT 21CN, Telstra Titan, including a number of major IP transformation projects.
It is in this growing challenge, the above situation makes the operators begin to consider how to dig the pipeline value, rather than the traditional, extensive bandwidth management, which is the operator's "smart pipe" power lies, thus, the "smart pipe" concept operational and health, and has been recognized by operators. Sales from the bandwidths of the changes to the intelligent pipe, inspection equipment, first thing to do is not the ability, not outline a vision of end to end, but a deep understanding of the connotation of intelligence pipeline. The word is not an accurate grasp of the smart, you can not have a purpose, a logical implementation of the transition to the intelligent pipe. Interpretation of intelligence, the most direct way is to start from the analysis of their own.
As intelligent beings, human intelligence is reflected in several aspects: First, the ability to learn, this basic capability allows us to continue to get other new capabilities, but also allows us to continue to respond to the new environment and thus the evolution and progress; and we were able to learn the way new knowledge is dependent on vision, hearing, smell and touch capabilities, which is the second ability - the ability to distinguish; Next, the intake of information already, we also have to analyze, collate and present, and presentation skills; Finally, in the brain of control, we will be thinking into action, it is implementation capacity. Intelligent pipe process, in fact, the ability of telecommunications networks is the process: the ability to distinguish, learning ability, analytical ability and implementation capacity.
Smart Pipe is a long, covering many areas of the subject. Technology is only one aspect, but also study how to use the pipeline to achieve intelligent business model transformation and other issues. In these respects, Shanghai Bell have a unique advantage: in Shanghai DemoCenter Alcatel-Lucent is the world's largest demonstration center, provides operators with an open platform for device / service verification, joint testing, in addition, we take full advantage of Alcatel Lang's global information resources and experience: IPTC (IP Transformation Center) is Alcatel-Lucent Research groups focus on IP transformation operators in the various issues facing the organization, including project consulting, transformation roadmap planning, hierarchical implementation, technical verification, has been involved so far include BT 21CN, Telstra Titan, including a number of major IP transformation projects.
The property and manufaturing methods of bearing steel
Bearing steel is hot-rolled or cold-rolled (cold drawn) of seamless steel tubes for the manufacture of bearing rings with the general. Pipe diameter 25-180 mm, wall thickness of 3.5-20 mm, sub-normal accuracy and high precision two. Ball bearing steel is used to manufacture, steel rollers and bearing rings. Bearing in work is under great pressure and friction with, so they requested bearing steel with a high and uniform hardness and wear resistance, and high elastic limit. The chemical composition of bearing steel uniformity, non-metallic inclusions content and distribution, carbide distribution and other requirements are very strict, all steel production in the most demanding steel one.
The physical properties of bearing steel mainly to check the microstructure, decarburization, non-metallic inclusions, mainly low magnification. Under normal circumstances are hot-rolled annealed, cold-drawn annealed delivery. Delivery status should be indicated in the contract. The macrostructure of steel must be free of shrinkage, skin bubbles, white spots and micro-pores. Center porosity, generally loose no more than 1.5, not more than two segregation. Steel annealing should be uniformly distributed fine granular pearlite. Decarburization depth, non-metallic inclusions and carbides uniformity shall conform to the relevant national standards.
Package delivery to a diameter less than 20mm, 20mm more than the delivery can be bare. Of cold drawn steel should be coated anti-rust oil. Quality of goods before delivery guarantee should be attached, indicate the steel, heat number, weight, size, chemical composition, test and test results.
Production of bearing steel bearings for steel are the following (marked with that "roll" of G): chrome bearing steel such as GCr6, GCr9 (SiMn), GCrl5 (SiMn); chrome bearing steel such as GSiMnV (Re), GSiMnMoV (Re), GMnMoV (Re); carburizing bearing steel such as G20CrMo, G20Cr2Mn2Mo; high carbon chrome bearing steel such as stainless 9Cr18 (Mo) and so on.
Bearing steel smelting high quality requirements, the need for strict control of sulfur, phosphorus, hydrogen content and non-metallic inclusions and carbide quantity, size and distribution, as non-metallic inclusions and carbide quantity, size and distribution of impact on the life of a great bearing steel, bearing failure is often in large inclusions or carbide produced around the micro-crack formed. Inclusion of content and oxygen content in steel is closely related to the higher oxygen content, the more the number of inclusions, the shorter life expectancy. The greater the size of inclusions and carbides, the more uneven the distribution, life is also shorter, and their size, distribution and use of smelting and refining process is closely related to the quality, now the main production of bearing steel and continuous casting process is EAF + ESR smelting process, there is a small vacuum induction + vacuum consumable double vacuum or + repeatedly vacuum consumable and other technology to improve the quality of bearing steel.
The physical properties of bearing steel mainly to check the microstructure, decarburization, non-metallic inclusions, mainly low magnification. Under normal circumstances are hot-rolled annealed, cold-drawn annealed delivery. Delivery status should be indicated in the contract. The macrostructure of steel must be free of shrinkage, skin bubbles, white spots and micro-pores. Center porosity, generally loose no more than 1.5, not more than two segregation. Steel annealing should be uniformly distributed fine granular pearlite. Decarburization depth, non-metallic inclusions and carbides uniformity shall conform to the relevant national standards.
Package delivery to a diameter less than 20mm, 20mm more than the delivery can be bare. Of cold drawn steel should be coated anti-rust oil. Quality of goods before delivery guarantee should be attached, indicate the steel, heat number, weight, size, chemical composition, test and test results.
Production of bearing steel bearings for steel are the following (marked with that "roll" of G): chrome bearing steel such as GCr6, GCr9 (SiMn), GCrl5 (SiMn); chrome bearing steel such as GSiMnV (Re), GSiMnMoV (Re), GMnMoV (Re); carburizing bearing steel such as G20CrMo, G20Cr2Mn2Mo; high carbon chrome bearing steel such as stainless 9Cr18 (Mo) and so on.
Bearing steel smelting high quality requirements, the need for strict control of sulfur, phosphorus, hydrogen content and non-metallic inclusions and carbide quantity, size and distribution, as non-metallic inclusions and carbide quantity, size and distribution of impact on the life of a great bearing steel, bearing failure is often in large inclusions or carbide produced around the micro-crack formed. Inclusion of content and oxygen content in steel is closely related to the higher oxygen content, the more the number of inclusions, the shorter life expectancy. The greater the size of inclusions and carbides, the more uneven the distribution, life is also shorter, and their size, distribution and use of smelting and refining process is closely related to the quality, now the main production of bearing steel and continuous casting process is EAF + ESR smelting process, there is a small vacuum induction + vacuum consumable double vacuum or + repeatedly vacuum consumable and other technology to improve the quality of bearing steel.
Monday, July 1, 2013
Seamless steel pipe for geological drilling and oil drilling
Geological drilling and oil drilling seamless steel pipe: To explore the underground rock, underground water, oil, gas and mineral resources, the use of drilling wells. Oil, natural gas and even less from wells, geological drilling.
Oil drilling seamless steel pipe is the main drilling equipment, including core outer tube, core tube, casing, drill pipe and so on. As the drilling pipe to work deep into the depth of several kilometers formation, working conditions is extremely complex, drill pipe under tensile, compressive, bending, twisting and uneven stress such as impact loading, but also by the mud, rock wear, therefore, required pipe must have sufficient strength, hardness, wear resistance and toughness, steel pipe with "DZ" (geology Pinyin prefix) plus a representative number, said yield point of steel, used steel has DZ45 of 45MnB, 50Mn; DZ50 of 40Mn2, 40Mn2Si; DZ55 of 40Mn2Mo, 40MnVB; DZ60 of 40MnMoB, DZ65 the 27MnMoVB. Steel have to heat treatment delivery.
Oil drilling seamless steel pipe is the main drilling equipment, including core outer tube, core tube, casing, drill pipe and so on. As the drilling pipe to work deep into the depth of several kilometers formation, working conditions is extremely complex, drill pipe under tensile, compressive, bending, twisting and uneven stress such as impact loading, but also by the mud, rock wear, therefore, required pipe must have sufficient strength, hardness, wear resistance and toughness, steel pipe with "DZ" (geology Pinyin prefix) plus a representative number, said yield point of steel, used steel has DZ45 of 45MnB, 50Mn; DZ50 of 40Mn2, 40Mn2Si; DZ55 of 40Mn2Mo, 40MnVB; DZ60 of 40MnMoB, DZ65 the 27MnMoVB. Steel have to heat treatment delivery.
The standard and application of large diameter thick-walled pipe for water engineering
Steel-plastic composite pipe with hot dip galvanized steel pipe as a matrix, by melting powder coating technology in the wall (wall also required) coating made of plastics, performance. Compared with galvanized pipe, with anti-corrosion, no rust, no fouling, smooth, smooth, clean non-toxic, long life, etc. According to the test, the service life of steel-plastic composite pipe more than three times as galvanized pipe. Compared with the plastic pipe, with high mechanical strength, pressure, heat and good benefits. As the substrate is steel, so there is no embrittlement, aging. It can be widely used in water, gas, chemical production.Products such as fluid transport and heating project is the upgrading of galvanized pipe products. Since its installation and use the same traditional galvanized pipe, pipe forms are identical, and can replace the aluminum-plastic composite pipe in large diameter water transmission play a role by users, has become the most competitive oil pipeline of new products.
Coated steel in large diameter spiral welded pipe and high-frequency welded pipe made of plastic coating is on the basis of a maximum nozzle diameter 1200mm, which can be coated with polyvinyl chloride according to different needs (PVC), polyethylene (PE), epoxy resin (EPOZY) and other various properties of plastic coated Layers, good adhesion, corrosion resistance, and can be resistant to acid, alkali and other chemical corrosion, non-toxic, non-corrosion, wear, impact resistance, strong penetration, pipe surface is smooth, does not adhere to any substance that can reduce the transmission time of resistance, to improve traffic and transportation efficiency, reduce delivery pressure power loss. Solvent-free coating, no leakage of material, which does not pollute the transmission medium, in order to ensure fluid purity and health, in the range of -40 ℃ to 80 ℃ hot and cold cycles can be used interchangeably, not aging, not cracking, which can be harsh in the cold zone, etc.
Coated steel in large diameter spiral welded pipe and high-frequency welded pipe made of plastic coating is on the basis of a maximum nozzle diameter 1200mm, which can be coated with polyvinyl chloride according to different needs (PVC), polyethylene (PE), epoxy resin (EPOZY) and other various properties of plastic coated Layers, good adhesion, corrosion resistance, and can be resistant to acid, alkali and other chemical corrosion, non-toxic, non-corrosion, wear, impact resistance, strong penetration, pipe surface is smooth, does not adhere to any substance that can reduce the transmission time of resistance, to improve traffic and transportation efficiency, reduce delivery pressure power loss. Solvent-free coating, no leakage of material, which does not pollute the transmission medium, in order to ensure fluid purity and health, in the range of -40 ℃ to 80 ℃ hot and cold cycles can be used interchangeably, not aging, not cracking, which can be harsh in the cold zone, etc.
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