LSAW Steel Pipe

    (1) Diameter and Wall thickness     JCOE can produce pipe diameter and wall thickness greater than the UOE, which is produced by the two molds and production processes of the decision. For UOE, a set of O machine mold can only produce a diameter of the pipe, and is the second process to complete the molding, pressure on the molding unit demanding, so UOE can produce a smaller diameter and wall thickness range. For JCOE, steel pipe forming is taken by bending machine step forming the bending pressure required to greatly reduce, so the power requirements of the unit greatly reduced. Therefore, in the case of the same unit pressure, JCOE can produce a greater range of wall thickness, and a set of molds can produce a variety of pipe diameter, pipe diameter can produce a greater range. Baosteel O forming machine pressure reached 72000t, is the world's largest pressure O forming one of the production wall thickness can reach 40mm. From the current domestic and intern...

    In the process of high-frequency welding steel pipe, the welding process and the control of process parameters, the placement of the induction coil and the position of the resistor have a great influence on the welding quality of the steel pipe weld.     1) Control of weld gap of steel pipe The steel strip enters into the welded pipe unit, which is formed by the forming roll, after the orientation of the guide roll, the round steel pipe blank with open gap is formed, and the squeezing amount of the squeezing roller is adjusted, ~ 3mm, and to keep the weld ends flush. Weld gap control is too large, will weld the weld caused by poor fusion or cracking; weld gap control is too small, due to excessive heat, resulting in weld burning, melting metal splash, welding quality of the weld . In this case,     2) The position of the induction coil should be placed on the same center line as the steel tube. The distance between the front end of the induction coi...

    Electric Resistance Welding (ERW) and seamless steel pipe is the biggest difference lies in the ERW if has a weld, which is the key to the quality of ERW steel pipe. Modern ERW steel pipe production process and equipment, as the international community, especially the United States and other years of unremitting efforts, making the ERW seamless steel pipe has been a more satisfactory solution. It was the ERW seamless steel pipe is divided into geometric seamless and physical seamless. Geometric seamless ERW steel pipe is to remove the internal and external glitches.     Due to the structure and tool of the inner burr removal system, the burr removal of large and medium-sized steel pipes has been well handled. The burr can be controlled in -0.2mm ~ +0.5 mm or so. Physical seamless means that there is a difference between the microstructure of the weld metal and the base metal, which leads to the decrease of the mechanical properties of the weld area, and needs t...

    Precision seamless steel pipe is a cold drawn or hot-rolled after treatment of a high-precision steel pipe. As the precision seamless steel pipe inside and outside the wall of non-oxidized layer of precision seamless steel pipe, to withstand high pressure without leakage, high precision, high finish, cold bending deformation, flaring, flattening without cracks, etc., is mainly used to produce pneumatic or hydraulic components Of products, such as cylinders or cylinders, are made of seamless tubes. Precision seamless steel pipe chemical composition of carbon C, silicon Si, manganese Mn, sulfur S, phosphorus P, chromium Cr.     Difference between precision steel pipe and seamless steel pipe     1, the main features of seamless steel pipe is no welding seam, can withstand greater pressure. The product can be very rough as-cast or cold-drawn parts.     2, precision steel pipe in recent years there are products, mainly within the hole, the o...

    Hot-rolled seamless steel pipe production is one of the important processes, the rational development of its process plan or not, a direct impact on the size of the steel pipe after rolling the surface of the precision and quality,     Unreasonable process plan will cause the inner surface of the steel pipe to produce the defects such as folding, crack and concave.     N80Q steel casing is a standard oil casing commonly used in oil (for the seamless steel pipe), the standard provisions of the finished pipe heat treatment process for quenching and tempering.     N80Q casing production process is as follows: furnace refining → continuous casting → annular furnace → perforation → continuous rolling → stepping furnace → sizing → sawing → tempering treatment → straightening → physical and chemical testing → testing → thread processing → Coupling tight → water pressure test → measuring length weighing, marking → packaging storage. The billet w...

    High-frequency welding machine can be used for metal pipe welding, for example: brass and brass, brass and steel pipe, steel pipe and steel pipe, steel pipe and iron pipe, brass and iron pipe, iron pipe and iron pipe, copper pipe and aluminum pipe , Pipe and aluminum, aluminum and aluminum tube of the butt welding, welding, welding, etc., for welding metal pipe (silver welding ring is recommended welding) advantages:     1, induction heating speed, high efficiency.     2, compared with the oxygen welding, energy saving and low cost.     3, the oxidation area is small.     4, after welding the appearance of fine, solid, full.     5, uniform heating, so no lack of welding and solder joints.     Check www.xysteelpipe.com for more info

    Difference between stainless steel thick-walled seamless tube and carbon seamless steel pipe , mainly refers to the stainless steel and carbon steel in the design rules of the differences, that is, the design rules of these two kinds of steel is not common. These differences are summarized as follows: Stainless steel design rules can not be used for carbon steel because there are three fundamental differences between stainless steel and carbon steel:     First, the cold work of stainless steel to work hardening, for example, bending anisotropy, that is: the horizontal and vertical performance is different. The strength increased by cold working may be utilized, but if the bending area is smaller than the total area and the increase is negligible, the increase in the strength may increase the safety factor to a certain extent. In this case,     Second, the stress / strain curve of different shapes, the elastic limit of stainless steel is about 50% of...

    1. Carbon seamless steel pipe quality inspection and acceptance by the supplier technical quality supervision department     2. The supplier must ensure that the delivery of steel pipe in accordance with the provisions of the corresponding product standards. The purchaser shall have the right to inspect and inspect the product according to the relevant product standards     3. Carbon seamless steel pipe should be submitted in bulk acceptance, the group approved the rules should be consistent with the provisions of the corresponding product standards.     4. Carbon seamless steel pipe inspection items, sampling number, sampling sites and test methods, according to the provisions of the corresponding product standards. The consent of the demand side, hot-rolled seamless steel tube can be sampled by rolling the root array.     5. Carbon seamless steel pipe test results, a non-compliance with product standards, should be unquali...

    Carbon seamless steel pipe is mainly used for conveying high-pressure oil and gas near the wellhead. With the increasingly serious problem of hydrogen sulfide corrosion, the development of anti-sulfur seamless pipeline is imminent, and the performance of sulfur-resistant is the key. The influence of Cu and Ni on the HIC properties of the seamless pipe materials and the S content in the steel were also investigated. The effects of Cu and Ni addition on the properties of the HIC were also investigated. Hydrogen bubbling sensitivity.     1. Test method     According to the ISO3183 standard, the ingot method was used to smelt 7t 1 t ingot in the laboratory. After forging, perforation, pipe jacking and sheet reduction, the pipe was cut to 20 mm × 100 mm × 5 mm , And then immersed in the solution prepared according to the standard. After 96 h, the specimens were taken out and taken perpendicular to the cross-section. Three parameters (crack length ratio C...

    SSAW steel pipe, nickname spiral submerged arc, is made by forming ube centerline hose reel molding angle (adjustable). However, do you really know me? Can you identify me with my family members of seamless steel pipe, ERW steel pipe and LSAW steel pipe?     My special trait is that with the same specification, we can be produced a variety of diameter sizes steel pipe. In addition, the raw materials to adapt to a wider range. With the balance production process, we SSAW steel pipe can avoid the main stress coming from the oil, gas or water when applied in the transportation work.     Of course, my bad behavior is that the poor geometry of the weld length compared to the long straight seam pipe. This may cause crack, slag or porosity. Then, who can own me with the saving money? Actually, class 3 and 4 grade oil and gas transportation can find me with the special design specification.     http://www.xysteelpipe.com/info/Do-you-really-know-...

    Pipe thread defects are as follows:     1, Tear (cracked): Mainly tooth side, addendum (round thread) geometry (including roughness) is damaged. Early thread processing with a single-knife picks easily lead to tear, blunt tool, lubrication is not good and other reasons are also likely to cause tearing, the general was scaly, ubiquitous thread side; thread oil in impurities such as sand, Will also cause torn; gauges have tumor on the flanks, the rules can easily lead to pipe thread surface torn.     2, The knife marks (trembling): Tooth top, side of the tooth due to the amount of feed, the tool beating or blunt tool wear caused.     3, Wear marks: Tooth top grinding very smooth into a flat top, the surface of the tube defects such as cracks, pits, etc. after grinding (wall thickness allowed to grind 12.5%), processing thread caused.     4, Black buckle: Round buckle outside the thread LC is not allowed; partial buckle outside ...

    Qualities of ERW Steel Pipes:     Before going into market, ERW steel pipes are routed through all required tests including a hydraulic test, an ultrasonic weld inspection on pipe body, pipe end, weld seam, bevel check, micrometer check, straightness evaluation, and ring gouge to ensure its quality. The high performance ERW steel pipes possess better anti-corrosion features, deformable and tougher.     Based on the customer's requirement, ERW (electric resistance welded) steel pipes are available in various qualities, wall thicknesses, and diameters of the finished pipes. While manufacturing ERW steel pipes, only high-quality, continuous-cast, fully killed, control-rolled, fine-grain, low-carbon steel is used. High performance ERW steel pipes and tubes possess high strength corrosion resistance, high deformability, high strength and high toughness.     Before reaching the market place, ERW steel tubes and pipes are routed through all req...

    Tubing pup joint are divided into five types according to their appearance:     (A) Thickening without thickening short section - the same specifications at both ends, one end of the tubing short pipe connected to thickening tubing, the other end is not connected to the thickening of the tubing or special thread tubing;     (B) Thicker outer diameter tapered section - different specifications at both ends, one end of tubing short pipe connected to a large outer thick tubing, the other end connected to a small size tubing;     (C) Thicker outer thickening short section - the same specifications at both ends, one end of the tubing short pipe connected to the outer thick tubing, the other end connected to the same specifications thick tubing;     (D) The same diameter short section - the same specifications at both ends, one end of the tubing short joints without thickening tubing or special threaded tubing, the other end is not...

    The ultrasonic probe can be realized electricity harmonies which can the mutual conversion of the Q and ultrasonic wave propagation in elastic media, the physical characteristic is the basis of the seamless steel pipe principle of the ultrasonic flaw detection.     Directional transmission of the ultrasonic beam propagation in Seamless encounter defects, and produces both a reflection of the wave generated wave attenuation. After the flaw detector of the signal processing, such as obtained using a reflection method flaw defect echo signals, such as penetration method flaw virtue through the degree of attenuation of the wave guide to the defect signal. Both can be a quantitative defect indication is given by the instrument. The use of the piezoelectric effect or the electromagnetic induction principle different types of ultrasonic wave can be excited within the tube. Therefore, the piezoelectric ultrasonic and electromagnetic ultrasound can be used to pipe ultra...

    Because of the advanced technology and the high requirement for devices, and casing service conditions, it is enforced to produce high grade oil casing, like the high quality oil casing ERW steel pipe.     How? There are skills on it for the high quality oil casing pipes’ production.     First, we should set the technical targets of oil casing steel pipe which is the steel grade, high anti-collapse oil casing being developed in engineering project. Like we should figure out the physical and chemical parameters for the steel pipe.     Second, we should make sure the research of the relations between the straightening amount and the residual stress which is in order to meet the requirements for the straightness and the roundness of oil casings.     What's more, the analysis of the rolling process control and comprehensive quality of the products is very important for the choice of the oil steel casing pipe.     http...

    Like Brian Tracy says that The key to success is to focus our conscious mind on things we desire not things we fear. As seamless steel pipe manufacturer, seamless steel pipe’s long life service with high quality would be the things we desire. Thus technology on those steel pipes would be our fighting direction.     Worldwide pipe divides seamless steel pipe in grades of carbon, chrome alloy, stainless and exotic. Due to its increased ability of high pressure taking, greater strength under loading, good uniformity of shape on each project, seamless steel pipe are now commonly used ship building, pipelines, oil rigs, oil field equipment, pressure vessels, machinery parts and offshore rigs.     No doubt that high quality, generally speaking, means high cost, so does for the seamless steel pipe. Seamless pipe can sometimes be more expensive than welded pipe. However, this increased ability to withstand pressure allows you to use pipes that are thinner a...

　　The countdown has begun: The 2018 PyeongChang Olympic and Paralympic Games (PyeongChang 2018) are less than 30 days away. The International Olympic Committee (IOC) has added 4 new events to this year’s games including curling mixed doubles, speed skating mass start, alpine skiing team event and snowboard big air. With the additions, athletes in the 2018 PyeongChang Olympic Winter Games will compete in 7 main sports, or 15 events including variations. 　　So, what do these athletes from all over the world competing in various different sports have in common? They all rely on steel to enhance their performance and keep them safe while they compete for the highest honors in their profession. 　　Here are some of the most prominent ways steel plays its part in winter Olympic sports: 　　 Blades/Edges of Steel 　　Ice Hockey 　　Ice hockey is easily the main attraction of winter Olympics as hockey finals are usually the last events of the Games. The same can be said of para ice hock...

    Kindness is an invaluable asset and we are seamless steel pipe manufacturer, which means that it is our greatest asset for various engineers in multifarious projects. Yeah, we are seamless steel pipe and we are our greatest asset.     We have a big family as we have immediate families who are carbon steel pipe, low alloy steel pipe, bearing steel pipe and stainless steel pipe. No doubt that we have special symbol for each other just like human beings who have their names too. Such as we have symbol or name like 304/304L/304H; 321/321H; 316/316L/316H; 316TI; 317L; 347H; 310S; UNS31803; UNS32750/U NS08904L, TP410/TP410S; ECT for all members in this family. Of course, we have relatives like ERW steel pipe, LSAW steel pipe, SSAW steel pipe and spiral welded pipe.     People need us so that we have our invaluable asset, like they would take us into the world of agriculture, aviation, transportation, high-tech fields like oil or gas transportation. Anyway...

    What is your feeling when you heard ERW steel pipe from the pageant of steel pipes? Yeah, we’ve made success in ERW steel pipe too with the advanced technology recent years and we can take them into lots of area nowadays such as oil and gas transportation too.     Five-year plan would be an important for our countries' development. According to the success news that " twelfth five-year" development plan "to 2015 NianShu oil and gas pipelines will exceed the total length of 150000 kilometers, which is 90% higher than in 2010. To some extent, we can see that due to the blossom of oil and gas pipelines, there is no doubt that we can make optimization for various steel pipes for the transportation not just the seamless steel pipe.     With the Steel Grade of API 5L, GR B, X42, X46, X56, X60, X65, X70, ASTM A53, GR A, GR B, GR C coming from ERW steel pipe and the surface dealing of Fusion bond Epoxy coating, Coal Tar Epoxy, 3PE, Vanish Coating, we can fi...

    There are any steps to pay attention in the production of seamless steel pipe:     1) Blank credit. Including the tube storage, tube cut off (cut or gas cut off), peeling grinding, testing and inspection, and seamless steel tube surface treatment (such as pickling) and cold centering.     2) Tube bad heating. Usually in the ring furnace or inclined furnace slab furnace heating, after the tube is generally baked after the heat sent to the perforation on the order.     3) Perforated. The solid round steel hollow rolling thick thick walnut, usually using two or three-roll oblique piercing piercing piercing. Explorer is also a continuous steel ingot billet, punching can die in the hydraulic press, or in the two-roll (vertical rolling) pressure piercing mill & nbsp; P.P.M. Mill 1: batch rolling piercing.     4) Rolling pipe. In order to reduce the hollow hair pipe step by step reduce the wall, must be in the pipe mill special ...

    Wearing your out like leather, you're bigger than life. And you're beautiful right where you are; you're perfect with all of your galvanized steel pipe scars. No doubt that you contribute yourself for our daily life with the water, oil and gas transportation. All of use need to say “thank you”.     There are three types of galvanized steel pipe mainly: pre-painted, hot-dipped galvanized, and cold-dipped galvanized. Galvanization would involve coating steel, iron or aluminum with a layer of zinc. Thus, here is the question: which kind of type would be better than others? Of course, the common method is hot-dipping for zinc with 120-500G/M2 which is high quality product, or fully submerging the metal in a bath of molten zinc. Under this situation, hot-dipping is usually preferred over other methods because it produces a thicker, more durable zinc layer.     In addition, when talking about function, galvanized steel pipes have a range of uses, especial...

    Whatever demands you have for your steel pipe supplier, if you need your steel pipe to be long lasting, then galvanized steel pipe coated with a thin layer of zinc would be one of your top choices.     1/2 inch diameter galvanized steel pipe, with connections threaded, the rust accumulation inside the steel pipe would choke down the diameter of the pipe. And this would lead to poor water pressure. Under this situation, it is necessary to have a check for the galvanized steel pipe regularly. Thus it would prolong life-span for the steel pipe. Rust can attack the steel pipe's walls too, making the walls thinner. What should we do for that? A zinc layer would slow down the progress of rust and this would save our money for repairing as well as the replacement. In addition, with a minimum thickness of 50 microns, galvanized steel pipe gives a working temperature of between -10 and +110 °, which has excellent adhesion properties and resistance to abrasion or burst. ...

    Main hardness of erw tube: Vickers hardness method can be used for the determination of thin metal materials and the surface layer hardness. It has the main advantages of brinell, rockwell, and overcome their basic shortcomings, but not as easy as rock's law vickers' method is seldom used in the standard of steel pipe.In the standard of steel pipe, brinell hardness is the most widely used, and the indentation diameter d is often used to indicate the hardness from the material, which is both intuitive and convenient. From extremely soft to extremely hard metal material, it makes up for the Brinell method is not, compared with the Brinell method is simple, can be directly read from the dial of the hardness machine.But because of its indentation, the hardness value is not as good as the cloth law accurate.     The vickers hardness test of erw tube is introduced: Vickers hardness test is an indentation test method, is a relative angle of 1360 square pyramid diamond...

    Discussion of steel pipes’ function is here among supplier’s communication meeting recently.What surprise us is that as time goes by, with the help of advanced technology, low pressure SSAW can also used for high pressure purpose.     Spiral welded pipe, with the name of spiral, we know that this is a kind of steel pipe that has a seam rolling around its entire length in a spiral form.     In the past, because of the manufacture's method, this kind of steel pipe can only be produced for low pressure and structural applications. With the improving of technology, the production of large hot rolled coils of sufficient width and the development of dependable non-destructive testing methods, it is now possible to produce Spiral Weld pipe for high-pressure service. For Sara, I think this is not the only one steel pipe for changing. As for ERW steel pipe, some customers would say that this kind of steel pipe cannot used for oil or gas transportation due to...

    I'm a steel pipe and I know it is necessary for me to have a rest. Just like anyone else, feeling the heat and feeling the cold would be normal emotion for steel pipes, like seamless steel pipe, ERW steel pipe and other steel pipes.     As a steel pipe, it follows that any evaluation of a steel pipe's life and a man's life by reference to a common time-scale must result in grievous error. For example, as water steel pipe for transportation of water, human should take care of the rust-proof from water. Thus we may have a long life service. The more the humans show me sympathy with good care, the more I am inclined to forget that I am a steel pipe.     As for oil or gas steel pipe, we would think that high quality production process would be an important step for our masters if they want us to have a good service during our work time. There are different materials, different standards, our masters should have a better notice and a good choice for the ...