Seamless steel pipe exporter

ASTM A179 cold drawn   seamless steel pipe   is mainly used in the metal structure equipment of various industries. It is mainly to soak the rust of steel parts into the molten zinc solution of 440 to 460 degrees C, so that the zinc coating on the surface of the steel plate is attached to the surface of the steel, thus the purpose of anticorrosion is to be played. This is an effective way of metal corrosion. The main features are as follows: (1) the ASTM A179 cold drawn seamless steel pipe manufacturer covers the compact and compact zinc layer on the surface of the cold drawn seamless steel tube. It can avoid the cold drawn seamless steel tube matrix and any contact with the corrosion solution to protect the steel matrix from corrosion. In the general atmosphere, the surface of the zinc layer forms a thin and dense Zinc Oxide surface, which is hard to dissolve in water, so the steel matrix plays a protective role. If Zinc Oxide and other components in the atmosphere produ...

Hot rolled   seamless steel tube : hot rolling is related to the cold drawn, hot rolling is performed above the recrystallization temperature of the rolling. Hot-rolled seamless steel tube process: Round tube perforation → heating → three-roll rolling, rolling or extrusion → detached → sizing (or reducing) → cooling → straightening → hydrostatic test (or testing) → mark → storage Hot-rolled seamless steel tube advantages: Ingot casting can destroy tissue, grain refinement of steel and eliminate defects microstructure, so that the steel dense tissue mechanical properties are improved. This improvement is mainly reflected in the direction along the rolling direction to a certain extent, the steel is no longer isotropic; pouring formed bubbles, cracks and loose, can be welded at a high temperature and pressure. Hot-rolled seamless stee tube disadvantages: 1. After hot rolling, the steel inside the non-metallic inclusions (mainly sulphide and oxide, and silicates) is pre...

The quality of tube billet is the main factor to judge the quality of   seamless pipe . In order to ensure the reasonable progress of the perforating process and obtain high quality seamless steel tubes, it is necessary to make strict requirements for the geometrical size of the tube, the microstructure and the low magnification of the surface. Seamless steel pipe Too large diameter or too large oval shape will make the condition of perforation worse. At the same time, it will cause compression deformation due to the large diameter. The key internal organizations are shrinkage and central porosity, non-metallic inclusions, and gas accumulation. The strictness of this requirement varies with the use of seamless steel tubes and steel grades. The most important thing is the surface quality of the tube, because in the steel tube billet to any disabled city seamless tube product, often misplaced sites lead to stress concentration, plastic deformation will deepen and extend ...

There are many ways to connect carbon   seamless steel pipe , and now several commonly used methods are listed: a, compression type; b, live connection; c, compression; d, push; e, taper thread; f, socket welding; g, live flange connection; welding and welding and the traditional combination of the derivative Series of connections. Different connections, because of their different production principles, their application areas are also different, but generally speaking, one thing in common is that it is convenient to install, reliable and reliable. Here are some more common links to make a brief introduction: 1. compression: insert the tube into the pipe, fasten it with the nut, compress the mouth of the casing through the seal ring with the screw force, and seal the function, then the connecting pipe can be completed. 2.flanges: flanges and pipes are used for TIG welding, fastened with fasteners or bolts, sealing between flanges and sealing. 3. welding type: pipe en...

The main factors that affect the quality of   seamless steel tube   machining are machine tools, knives, fixtures, workpiece blanks, process methods and processing environment. To improve the quality of seamless steel tube cutting, we must take appropriate measures in these areas, such as reducing machine work error, the correct selection of cutting tools to improve the quality of blanks, reasonable arrangements for the process to improve environmental conditions. Commonly used methods to reduce the cutting error of seamless machine tools are: (1) enough precision and stiffness of the machine. (2) if necessary, it is possible to use the revise method of screw grinder or hobbing machine to correct the error of the machine tool transmission system according to the previously measured machine chain error correction device. (3) Use the machine tool jig to ensure the machining precision, for example, using the drill die processing box on the drilling system, so that th...

Seamless elbow is manufactured by the   seamless steel pipe , through hot push, press or extrusion processes, no seam on the elbow body. Welded elbow is manufactured by welded steel pipe, same processes with seamless elbow.But there is a seam on the elbow body. Prime steel pipe tells you the differences between seamless elbow and welded elbow on raw material, manufacturing processes, performances, appearances, sizes, applications, cost prices etc. 1. Appearance difference The biggest difference between seamless elbows and welded elbows are whether there is a weld, but now many of the welded steel pipes will be polished off the welding seam before they leave the factory. The elbow that is made out of this steel pipe is invisible to the welding seam.There are a lot of exporter sell this kind of fake seamless elbow to customers. This kind of elbow is difficult to distinguish with the naked eye, and it needs to use professional testing tools. For now,false seamless elbow oft...

Requirement for API 5L X52   seamless pipes   in standard 1. No cracks, folds, folds, peels, scabs and scales are allowed on the inner and outer surfaces of the steel pipe. These defects should be completely removed. The grinding of the surface defects should be smooth and smooth. The depth of the clearance shall not exceed the negative deviation of the nominal wall thickness. The actual thickness of the defect removal zone shall not be less than the minimum allowable wall thickness of the steel pipe. The method of welding shall not be used. 2. The straight path appearing on the inner and outer surfaces of the steel pipe must be ground. The depth of clearance must not exceed the negative deviation of the nominal wall thickness. The actual thickness of the defect removal area should not be less than the minimum wall thickness allowed by the steel pipe. 3. End shape: Both ends of the steel tube should be cut at right angles and the burrs removed. 4. Solder joint inter...

We would take   seamless steel pipe   into list once we discuss the petroleum’s exploit. How’s the price now for seamless steel pipe? Today, supplier would have an introduction for this question. First of all, in order to prevent soil erosion, seamless steel pipe for petroleum transportation underground should be coated with anti-corrosion paint or tar, asphalt and other anti-corrosion coatings, or covered with asphalt impregnated glass cloth and linen.Under this situation, you need to add the price for this. What's more, all seamless steel pipes should be clean before using. and some steel pipe need to clean regularly. So we should take this cost into consideration too. On the pipelines that transport oil and natural gas over long distances, the dirt accumulated in the steel pipes must be removed regularly by a sweeper. For this purpose, dedicated devices for sending and receiving sweepers should be installed. Check www.tjxysteel.com for more info. Contact Email...

The solution temperature is mainly determined by chemical composition. In general, the solution temperature should increase for those containing many kinds of alloy elements or with high alloy. Especially for those that contains high steel, like manganese, molybdenum, nickel, silicon. Only by increasing the solution temperature can we dissolve and soften them. But for stabilized steels such as 321   stainless steel pipe , when the solution temperature is high, the carbide of the stabilizing elements are fully dissolved in the austenite and precipitate in the grain boundary with the form of Cr23C6 after cooling. That can cause intergranular corrosion. We often adopt the lowest solution temperature for carbide(Tic and NbC) of the stabilizing elements which can't be dissolved or treated by solid solution. For seamless stainless steel pipe, the three elements of the solution treatment are temperature, holding time and cooling rate. What is the role of solution treatment of seaml...

Gi seamless pipe during the welding process of the fluid pipe, due to various reasons, there may be some hidden dangers. Therefore, regular safety inspections are necessary. Below, let me introduce the precautions for welding safety inspection. Welding site, equipment safety inspection: 1. Check whether the equipment, tools, and materials for the welding and cutting work points are arranged neatly and not in a random manner. 2. Check whether the welding site maintains the necessary channels, and the width of the vehicle channel is not less than 3m, and the pedestrian channel is not less than 1.5m. 3. Check whether all welding hoses and welding cables are entangled with each other. If they are entangled, they must be separated. Whether the cylinders are removed from the work site after use or not, various gas cylinders at the work site must not be placed horizontally. 4. Check whether the welding work area is sufficient. The welding work area should not be less than 4m2. Th...

Ultrasonic probe can realize electric harmony, and can transform Q and ultrasonic propagation in elastic media. Physical characteristics are the foundation of the seamless steel tube principle of 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 ultrasonic inspection. But the electromagnetic ultrasonic applies on...

There are some common production equipment for steel pipes. And of course, different types of steel pips would need the different production equipment for the special process too. Today, Tianjin Xinyue Steel Group would have an introduction for production equipment for   seamless steel pipe . Piercing mill: Taking conical-roller as quick-rolling and uniform tubularible thickness, it is widely used in seamless steel pipe's production. It is easy to adjust for feeding angle and the angle. Slight-stretch reducing mill: This kind of machine has three rollers for respective-power-transmission. Its flexible adjustment would make it high-precise outer diameter and superior when used for surface finishing. Rotating heat furnace: It is available for a single or dual-feeding type. Its automated furnace-temperature would save labor's energy. Check www.tjxysteel.com for more details. Contact Email: marketing@xysteelpipe.com Skype/WhatsApp/MP: +8618974849825

There is thermal stress and tissue stress in the heat treatment of  seamless steel pipe . The internal stress can be superimposed or partially offset, it is complex and changeable because it can change with heating temperature, heating speed, cooling speed, cooling speed, shape, and size of parts, so the heat treatment deformation is inevitable. The mechanical collision of the seamless steel pipe in the heat treatment process can also cause the deformation of the parts, but the deformation can be improved with the operation, thus reducing and avoiding. 1, surface decarbonization In the process of heat treatment, if the seamless steel tube is heated in the oxidation medium, the surface will be oxidized by some surface, thus reducing the quality of carbon and leading to the decarburization of the surface. The surface decarburization depth will exceed the final processing volume and scrap parts will be scrapped. Determination of surface decarburization depth by a metallographic...

Due to multifarious factors, there is analysis for the steel pipe’s market growth rate. No matter you are   seamless steel pipe , ERW steel pipe or galvanized steel pipe, we should have a basic analysis for recent year’s volume of selling. First of all, Tianjin Xinyue Steel Group would make a basic database for supply according to supply ability of 600 Metric Ton/Metric Tons per Day. What’s more, we would like to make a selling plan combining the market demands for steel pipe. Of course, the conjunction of workmanship and artistry in making steel pipes decides the value of them. So we should make considerable price according to the quality of steel pipes. When we figure out the basic information, then we can make a guess for the future market growth of steel pipe now. Check www.tjxysteel.com for more info. Contact Email: marketing@xysteelpipe.com . Skype/MP/WhatsApp: +8618974849825

The heat treatment of 15CrMo   seamless steel pipe   is one of important process in manufacturing process. Compared with other processes, the heat treatment generally does not change the shape and chemical compositions of 15CrMo seamless steel pipe. It changes the chemical composition of the surface of 15CrMo seamless steel pipe, to improve the performance of the workpiece. In order to make the 15CrMo seamless steel pipe has the required mechanical properties, physical properties and chemical properties, heat treatment is necessary besides selecting reasonable materials and a variety of forming process. Steel is the most widely used material in the mechanical industry. In the 1960s, the heat treatment takes advantage of plasma field which make 15CrMo seamless steel pipe obtain new technology for surface heat treatment and chemical heat treatment. Heat treatment can control the microstructure of steel, therefore, heat treatment is important for 15CrMo seamless steel pi...

Higher Pressure Ratings: One of the most striking features of seamless tubing is its ability to withstand higher pressure. Hence a   seamless tube is said to be equally stronger around the entire circumference of the pipe. It has 20% higher ASME (American Society of Mechanical Engineers) working pressure in comparison to the conventional welded tubing methods. In critical applications, the instruments and tubing can sustain pressure above 30,000 psi. This can eventually save time and money, which will also aid in minimizing the maintenance expense and reducing the unplanned downtime. Seamless tubes are designed to sustain a great amount of load when filled with materials or liquid in addition to its own weight. Uniformity in Shape: Seamless pipes have round cross section as it comes with a continuous extrusion, thus giving them a round cross section and a uniform shape. Also, the seamless tubing has no longitudinal weld seam. The tubes are designed in such a way that they ...

SMLS steel pipe   is mainly used for petrochemical cracking pipe, boiler tube, pipe, automobile bearing, petroleum geology drill pipe, tractor, aviation and other precision structure pipe. Small OD SMLS steel pipe is widely used for both side submerged arc welded manufacturing technology. Small OD SMLS steel pipe’s manufacturing process can be bending, internal welding, commissural, external welding, straightening, flat top multi-channel, etc, to achieve API standards. Large OD with thick wall can be used in all kinds of construction site and make the body supporting portion. For example bridge support, offshore piling, and other building pile.Also, it can also used for liquid transportation. Check www.tjxysteel.com for more info. Contact Email: marketing@xysteelpipe.com . Skype/MP/WhatsApp: +8618974849825

Seamless steel tube, from its spelling, we can see that it has no weld.So it can bear high pressure or high temperature working condition. Forming process for   seamless steel pipe   can be casting or cold drawing. Precision steel pipe need more advanced technology, so it just been applied in recent years. Also from the spelling, we can see that there will be much less tolerance for precision steel pipe, this includes OD tolerance, WT tolerance, roundness tolerance, length tolerance, weight tolerance, etc. Cold drawn precision steel pipe features: 1. Complicated cross section. 2. Accurate precision and good surface quality. 3. MOQ is much less than normal carbon steel pipes. 4. OD will be smaller. Generally speaking, for small OD with strict tolerance range, it would be better if we choose to go by precision steel pipe, especially for industrial steel pipe or steel pipes used for machines. Check www.tjxysteel.com for more info. Contact Email: marketing@...

The main factors affect the quality of   seamless steel pipe   machining are machine tools, knives, fixtures, workpiece blanks, process methods and processing environment. To improve the quality of seamless steel pipe cutting, we must take appropriate measures in these areas, such as reducing machine work error, the correct selection of cutting tools to improve the quality of blanks, reasonable arrangements for the process to improve environmental conditions. Reduce the seamless machine tool cutting error usually used methods are: 1. Use with sufficient precision and stiffness of the machine. 2. If necessary, you can take the compensation correction method, such as in the thread grinder or hobbing machine, according to the previously measured machine tool chain error error correction device to correct the machine drive system error. 3. Eliminate the vibration source inside the machine and take vibration isolation measures to reduce the vibration on the seamless st...

Piercing tool of   seamless steel pipe   is following below: 1) Roller: It is the main drive deformation tool. Usually the roller is composed of inlet cone, rolled belt (also called compression belt) and outlet cone. Its function: a. Inlet cone: Into the tube blank and achieve tube perforation. b. The exit cone is to achieve hair wall reduction, levelling of the capillary surface, uniform capillary wall thickness and complete capillary return. c. Rolling belt: play a transition from the inlet cone to the exit cone. 2) Guide: It is a fixed external deformation tool, not only plays the guiding role of the tube blank and the capillary tube, making the rolling line stable, but more important is the closed hole outer ring, limiting the lateral deformation of the capillary tube - expanding diameter, play a role in controlling the diameter of the outer diameter of the capillary tube. The guide plate has the same shape as a roll and has an inlet section, a transition se...