steel pipe

　　The ASTM A53 specification covers the types of fabrication of welded and seamless steel tubes with black carbon steel material. Hot dipped galvanized steel tubes, black, welded and seamless. The diameters range from NPS 1?8 to NPS 26 (10.3 mm to 660 mm) of nominal wall thickness. 　　The ASTM A106 standard specification covers the seamless carbon steel tube, applied for high temperature services. 　　Different types and grades for both standards 　　Types and grades of ASTM A53 steel pipes 　　For ASTM A53 there are ERW and seamless steel tubes Type F, E, S covering Grades A and B. 　　A53 Type F, butt welding in furnace, continuous welding Grade A 　　A53 Type E, electric resistance welding (ERW), in Grade A and Grade B. 　　A53 Type S, seamless steel pipe, in Grade A and Grade B. 　　If the steel raw material of different grades is in continuous casting process, the result of the transition material will be identified and the manufacturer should eliminate the transition material wi...

　　It should be taken into account that the HFW pipe is a type of ERW pipe . 　　The high frequency welded steel pipe (HFW) is that ERW pipe produced with a welding current frequency equal to or greater than 70 kHZ. Through resistance to high frequency current welding, heat is generated in the contact objects, whereby the object surface is heated to the plastic state, then, with or without forging, to achieve a combination of steels. HFW is a solid resistance thermal energy. The high frequency current that passes through the metallic conductor will produce two peculiar effects, the skin effect and the proximity effect. The HFW process uses the skin effect to concentrate on the surface of the steel object and uses proximity effects to control the position and power of the high frequency electric current flow path. Since the speed is very high, the edge of the contacted plate can be heated and melted in a short time, then extruded through the coupling process. 　　Advantages of the HFW pi...

　　What is the difference between tubing and casing pipe? Where is the oil well separately? Is the casing pipe the one that is the outermost layer of the well? Let me help you answer the following: 　　Tubing and casing pipe are essential tools for oil exploration. 　　The tubing is a tube that is lowered into the casing of the well when the well is being produced normally. From the well, the oil flows through the oil pipe into the ground and enters the gathering process. In the coal mining well, the combination of oil pipe, sucker rod and deep well pump draws oil to the ground and enters the gathering process. 　　The casing is a pipe that is lowered into the well after the drilling is completed. The casing and the well wall are cement-sealed, and then the perforating gun is used to align the perforation of the target layer, so that the oil flows through the rock layer, the cement ring, and the casing into the well. At the bottom, enter the tubing and come to the ground. The main role ...

　　The biggest difference between thick-walled pipe and thinwalled pipe is just as the name suggested. The difference is the thickness of the pipe. In general,thin-walled pipe is produced by cold drawn technology, while thickwalled pipe is by using the hot rolling technology to produce. We can use the unit of measure used to differentiate those two types of steel pipes. When the thick divided the diameter equal to 0.05, it is a watershed thick walled steel pipe. When the thick divided the diameter is less than 0.05, then it is a thin-walled steel pipe. In terms of the use of thin-walled steel pipe is for the pipeline, while the thick-walled steel pipe is used for hollow parts blank, pressure and the important pipeline use. 　　Thick-walled welded steel pipe is mainly used in water engineering, petrochemical industry, chemical industry, power industry, agricultural irrigation, urban construction. 　　- For Transport of liquids: water supply, drainage 　　- For Gas Transportation: gas, s...

　　With the rapid development of economy and the continuous improvement of the energy demand, the pipeline as the oil and gas resources has developed in recent years. A number of medium-caliber ERW line pipe unit was completed and put into operation. ERW line pipe has been widely used in the oil and gas field gathering pipelines, oil and gas Spur. This article will focus on the circumferential residual stress on the impact of ERW line pipe manufacturing process and final product quality and control aspects of the problem. 　　 ERW pipe forming process can be divided into two phases: the first stage of deformation; the second stage for reducing distortion. In both phases, the steel pipe inner layer is always affected by the circumferential compressive stress and compressive deformation. The outer layer of fine molding of the bending process by weeks to the tensile stress and extension deformation: in the fine shaping and sizing process. Steel outer layer of compressive stress and compre...

　　 Pipe fitting is a general term for the parts and components connected, controlled, deflected, shunt, sealed and supported in the Pipe system. According to end connections, steel pipe fittings can be divided into four categories: butt welded, socket welded, threaded and flanged. Do you know what the pipe fitting is made of? 　　As we know, these fittings are available in different types used in piping system and mainly consist of elbow, long radius bend, tee, reducer, union, coupling, cross, cap, swage nipple, plug, bush, expansion joint, adapters, olet, steam traps, and flanges. According the pipe end connection, the pipe fitting can be divided into butt weld fittings, socket weld fittings, threaded fittings and pipe flange. Here today we will introduce the commonly used socket weld fittings for you. 　　Forged Socket Weld Fittings Material And Grades: 　　Carbon Steel: ASTM/ ASME A 105, ASTM/ ASME A 350 LF 2, ASTM / ASME A 53 GR. A & B, ASTM A 106 GR. A, B & C. 　　API 5L ...

　　 SSAW steel pipe is a strip coil as raw material, after extrusion at room temperature, with automatic double wire-sided submerged arc welding process welded spiral seam steel pipe. 　　SSAW steel pipe process performance are as follows: 　　1. Bending performance. Prescribed by apex diameter bend 180 degrees, reinforced by the curved parts of the surface can not crack. 　　2. Reverse bending performance. According to the requirements, it can be reinforced reverse bending performance test. Reverse bending test bending test apex diameter than the corresponding increase in a bar diameter. First bend forward 45 degrees, after the reverse bend 23 degrees, 23 degrees after the reverse bending. After the reverse bending test, reinforced by the curved parts of the surface can not crack. 　　3. The surface quality. Steel surface allowed to have cracks, scarring and folding. Reinforced surface allows the bump, but shall not exceed the height of the transverse ribs, on the other steel surface ...

　　The commonly used buckle types for oil casing pipes are divided into three types: EU, NU and New Vam. 　　These three types of buckles can be found in the tool shop. The EU and NU are difficult to distinguish from the appearance of the buckles. They are all triangular buckles, but they can be easily distinguished from the entire column.NU means no external thickening. New Vam is actually a trapezoidal buckle (the cross section is rectangular), but also without thickened, so it is easy to distinguish. 　　1. EU buckle is an external thickened tubing buckle type. Three EU-related piano logos will also be found during the process of knowing the buckle joints on the shop floor. 　　2. NU (Non-upset) has no external thickening, NU indicates that there is no outer thickened tubing oint. In addition to no external thickening and EU generally there is a difference is that NU is 　　generally 10 buckles per inch, EU is generally 8 buckles per inch. Where NUE means non-thickened end or end non...

　　The difference between the outside diameter of the SSAW steel pipe diameter and pipe joints something greater than the height of the intermediate layer square steel stent; steel square bottom bracket height is greater than the topmost square steel bracket height; bottom square steel bracket the intermediate layer is greater than the height of the square steel bracket height; spiral pipe spiral pipe plant in the same layer, the adjacent ends of two steel drill pipe joints stuff mutual distance staggered arranged along the longitudinal direction of the drill pipe; in two adjacent steel pipe, two upper and lower drill pipe coupling end things shifted away from each other are arranged along the longitudinal direction of the drill pipe; poor thing drill pipe joints and the outer diameter of the steel pipe drill pipe outside diameter greater than the topmost square steel bracket height. 　　This package contains the most top bracket, the middle layer and the bottom of the square steel bra...

　　In the LSAW steel pipe production process, because the primary process is in a hot state, so the heating operation is resolution product quality is very important process. 　　The heat with the furnace, according to their results, and reheating furnace is divided into two kinds; the former is used to billet heated from room temperature to the processing temperature; the latter is used in the process in the blank reheated to the required processing temperature. 　　Heating will be wrong in the outer surface of the tube surface may exhibit cracks, folds and migraine pain and other waste reason. 　　Furnace There are many ways, but the primary use is a ring furnace. This furnace has an annular hearth, it can slowly change the direction of the diameter of the blank along the bottom of the load from the entrance, a reversal can be used at the outlet of the heating and soaking temperature to the rule kind of stove. This operation is the key blank is heated uniformly heated to a temperatur...

　　On engineering, process operating parameters should not be used directly as a pressure pipeline design conditions, factors to consider process operating fluctuations, the impact of connected devices, environmental impact, etc., and on the basis of operating parameters of the process are given a certain amount as a design safety margin condition. Design conditions mentioned here mainly refers to the design pressure and design temperature. 　　 SSAW steel pipe design pressure: when should not be less than the normal operating pressure under the most demanding conditions by the internal pressure (or external pressure) and temperature constituted. 　　The most severe conditions: is the lead pipe and piping components maximum wall thickness or the maximum nominal pressure rating conditions. 　　Design pressure determination: consider the medium hydrostatic pressure and other factors, the design pressure should generally be slightly higher than the maximum working pressure under the most ...

　　The causes and prevention methods of the stomata of the spiral steel pipe welds, the shortcomings of the spiral steel pipe weld zone are stomata, hot cracks, and undercuts. Spiral steel pipe weld porosity not only affects the fineness of the pipe weld, but also constitutes the leakage of the pipe, and will become the induction point of corrosion, severely reducing the weld strength and durability. 　　The elements of the weld hole are: moisture, dirt, scale and iron filings in the flux, welding composition and masking thickness, appearance quality of the steel plate, steel plate edge treatment, welding process and steel tube forming process. Flux composition. When welding contains proper amount of CaF2 and SiO2, it will reverberate and absorb a lot of H2. The HF which is highly stable and insoluble in liquid metal can then avoid the formation of hydrogen pores. 　　Bubbles. Bubbles occur mostly in the center of the bead. The main reason is that hydrogen is still hidden inside the wel...

　　Steel is found in all kinds of products, from the aerospace industry to kitchen utensils. Such applications require a versatile material and the steel fits perfectly. Did you know that the word steel actually describes a complete family of metal alloys? Some of the most important iron alloys are stainless steel and carbon steel . 　　In the next article, we will talk about them and tell you what is your best option according to your needs. 　　Steel composition 　　Iron and carbon are constituents of steel. In general, steels with a higher carbon content are hard and fragile, while those with a lower content are ductile and resistant. 　　Simply put, the carbon composition in steel is not constant and varies depending on the type and degree to be achieved. For example, the carbon content of 0.2% to 1.2% by weight is common in this metal. 　　What makes stainless steel unique is its impeccable corrosion resistance, or in other words, the ability not to corrode or oxidize under normal ...

　　Carbon-containing steel as the main alloy element is called carbon steel . Actually, it receives this denomination due to the high amount of carbon in its composition. 　　The technical definition, although complex, is reduced to a simple restriction: true carbon steels have almost no alloy elements, so they are mainly made of iron and carbon. 　　The properties of this type of steel depend on the percentage of carbon it possesses. Based on the quantity, we can classify them into three categories: 　　Medium carbon steel 　　High carbon steel 　　Ultra high carbon steel 　　The composition of high carbon steel ranges from 0.3% to 1.7%. At first glance this doesn't seem like much, but adding even a tiny amount of carbon to the composition can make a huge difference. 　　For example, ultra-high carbon steel contains about 1% to 2% carbon. The high amount of this ingredient in steel allows it to withstand extreme temperatures. This is the reason why heat treatments can be carried ou...

　　The manufacturers of inputs or machinery for the food industry have very strict requirements that must be met to avoid product contamination. Each piece of metal of a specific stainless steel grade needs to be perfect to the smallest detail to ensure full compliance with food safety standards. 　　Many food manufacturers use trays of this metal in their food processing processes. However, what some might not realize is that not any type of stainless steel will work in this industry. 　　There are hundreds of different varieties of stainless steel on the market, each with its own unique combination of properties. This leaves the question: what is the best grade of stainless steel for the food industry? 　　The answer depends on the specific application for which the metal will be used. For example, a confectioner who makes chocolates will have very different performance needs than a processor that specializes in tomato sauces. 　　In the following article, we will mention two of the ...

　　With the rapid development of the petroleum industry, the serious corrosion of oil well casings, buried pipelines, tank bottoms, especially oil well casings inside the oilfield has seriously affected the production, development, management and environment of the oilfield. Corrosion exists in the inner and outer walls of the oil and gas well casing, and the internal corrosion is serious. 　　In addition, in the well section where the inclination of the well varies greatly, the mechanical damage of the casing to the casing accelerates the corrosion perforation of the casing; the welding defects existing in the weld, the gap of the thread and the like are likely to cause differences in the electrochemical performance of the surface of the steel pipe. It also causes corrosion damage to be more serious. To solve the corrosion problem of the inner wall of the oil well casing, generally add a bactericide, a corrosion inhibitor, a mediation PH value, a closed oxygen barrier technology in the...