ERW Steel Pipe

    The heat treatment after welding is a new technique to eliminate residual stress. Preheating the material to the post-heat treatment temperature before welding and welding of the workpiece continued to keep the heating temperature, the use of insulation after the completion of the insulation of cotton to its slow cooling. This method can effectively reduce the welding residual stress and improve the stress corrosion resistance of metal.     After welding heat treatment can effectively reduce the welding residual stress, and the higher the heat treatment temperature, the better the residual stress elimination effect. The heat treatment of large diameter lsaw steel pipe can effectively improve the stress corrosion resistance of large diameter steel pipe. The higher the temperature of post-heat treatment, the more remarkable the stress corrosion resistance is. Diffusion method Metal carbide coating technology is the workpiece placed in special media, the prolifer...

    General seamless stainless tube production process can be divided into cold drawing and hot rolled, cold rolled seamless steel tube production process generally more complicated than hot rolled, three-roll rolling tube billet must first, after the extrusion sizing test, if there is no response after crack on the surface of pipe have to be cut after cutting machine, cutting grow about a meter of billet. And then enter the annealing process, annealing with acid pickling liquid, pickling when should pay attention to whether there is a lot of bubble surface, if there is a lot of bubbles show that the quality of the steel tube are not up to the standard of the response. Appearance on cold rolled seamless steel tube is shorter in hot rolled seamless steel pipe, cold rolled seamless steel tube wall thickness generally smaller than hot rolled seamless steel tube, but the surface looks brighter than the thick wall seamless steel tube, not a lot of rough surface, the diameter is not...

    Now the production of seamless steel pipe, mostly the use of hot-rolled technology, because the temperature is high, so the deformation resistance is relatively small, are generally used to complete the rectification rolling plate rolling process, in this operation, but also need to take into account the steel Of the specific thickness, if it is relatively low precision requirements, there will be no plate-shaped problems, mainly dominated by control, that is, in terms of temperature control, but also a must be considered at the same time It can be said that this part of the consideration is also very important.     The market for seamless steel tubes have distinctive quality requirements, especially for different alloy elements can not be careless, of which the harmful elements must be strictly controlled, but also need to take into account the pipeline material after the completion of the production of dangerous And defects, such as possible cracks, internal ...

    API mild steel pipe is widely used in lots of industries. However, a lot of customers still don't know kinds of API steel pipe and their usage. Here we are instroduce you the detail of API steel pipe.     API line steel pipe     API line steel pipe is the line pipe that meets the American Petroleum standard. Line pipe is used for transportation of oil, gas and water to the oil and gas industry enterprises. Ends of pipe include plain end, threaded end and socket end; their connections concludes end welding, coupling, socket connections. With the development of technology, API line steel pipe's range of applications is expanding gradually, especially in the large-diameter disaster. Coupled with the factor of cost, welded pipe have a dominant position in the field of line pipe, limiting development of stainless steel seamless line pipe. During 2004, production of seamless line pipe is about 400,000 t, ranging from X42 to X70. API line steel pipe is div...

    1. Low temperature embrittlement of stainless steel pipe     In low temperature environment, the deformation energy is small. In low temperature environment, the elongation and the decrease of the shrinkage of the section are called low temperature embrittlement. And more in the ferrite series of body-centered cubic tissue.     2. Low temperature processing of stainless steel pipe     The martensitic stainless steel is quenched from austenitizing temperature and then cooled to a very low temperature to promote the martensite quenching method. Suitable for easy production of residual austenitic stainless steel.     Stainless steel pipe at low temperatures, resistance, linear expansion coefficient, thermal conductivity, mass hot melt and magnetic will change greatly. Resistance, linear expansion coefficient at low temperature becomes smaller; thermal conductivity, mass heat capacity at a low temperature drastically reduced. ...

    The so-called difference between stainless steel seamless steel pipe and carbon steel seamless steel pipe, mainly refers to the stainless steel and carbon steel in the design rules of the differences, that is, these two kinds of steel design rules are not common.     Stainless steel design rules can not be used for carbon steel because there are three fundamental differences between stainless and carbon seamless steel pipe.     First, the cold work of stainless steel to work hardening, for example, when bent with anisotropy, namely: horizontal directional and vertical performance are 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% o...

    The precision seamless steel tube to a certain temperature (usually in the phase transition temperature or recrystallization temperature below), the insulation for some time, and then slowly cooling, to eliminate stress in a variety of precision seamless steel tube annealing process.     In press working, casting, welding, heat treatment, cutting and other processes, the product may produce internal stress. In most cases, the metal will retain a portion of its residual stress after the process has ended. Residual stress can lead to fracture, deformation or size change of the workpiece, residual stress also improve the metal chemical activity, in the residual tensile stress is particularly vulnerable to intergranular corrosion caused by rupture. Therefore, the residual stress will affect the performance of precision seamless steel pipe or lead to premature failure of the workpiece.     When the stress is less than the yield strength of the material ...

    Carbon seamless steel pipe is generally in the automatic production of rolling pipe unit. The solid blank is inspected and removed from the surface defects, cut into the required length, in the tube end of the perforation end of the centering, and then sent to the heating in furnace, perforation in the punch.continue to rotate and move when perforation, in the role of the roll and the head, the tube gradually formed within the cavity, called the capillary. And then sent to the automatic rolling machine to continue rolling. And finally by the whole machine are the whole wall thickness, by sizing machine diameter, to specifications. The use of continuous rolling mill production of hot-rolled seamless steel pipe is a more advanced method.     If you want to get smaller and better quality of seamless tubes, it must be cold-rolled, cold drawn or a combination of the two methods. Cold rolling is usually carried out on a two-roll mill, in which the steel pipe is roll...

    The higher the pressure of the transmission medium, the thicker the thickness of the pipe, the pipe material requirements are generally higher.     Medium pressure above 1.6MPa, the choice of seamless steel pipe or non-ferrous metal pipe. High pressure, such as ammonia, urea and methanol production, and some pipe media pressure up to 32MPa, the general choice of materials for the 20 steel or 15MnV high-pressure seamless steel pip e. In the vacuum equipment on the tube and the pressure is greater than 10MPa when the oxygen pipe, generally use brass and brass.     Medium pressure below 1.6MPa, may consider the use of welded steel pipe, cast iron pipe or non-metallic pipe. But the cast iron pipe to withstand the pressure of the medium shall not be greater than 1.0MPa. Non-metallic pipe can withstand the medium pressure, and non-metallic materials, such as hard PVC pipe, the use of pressure is less than or equal to 1.6MPa; reinforced polypropylene pipe,...

    EFW weld, a process in which metal is heated by one or several consumable electrodes and the workpiece to heat the metal. The arc melts the metal and the filler material sufficiently, without the need for pressurization, filling the metal part with work. All from the electrode. Operation process is as follows:     ① In accordance with the requirements of the operation of the fused welding machine wire, set the correct welding parameters of electric welding, you can use manual or automatic two input methods.     ② Check correct, start the fused welding machine, enter the welding process, when the welding time, the machine will automatically enter the cooling state.     ③ When the pipe is completely cooled, remove the fused welding machine.     ④ With a plastic pipe cutter or cutting device with a fine tooth saw cut the pipe, and its end perpendicular to the pipe axis. Use a knife to cut the inner edge of the hairs, in the pipe...

    If the tenth anniversary of the perfect ratio for a song, then every type of steel pipe of the growth process is of course the song in a beautiful note. Whether you are seamless steel pipe, ERW steel pipe, LSAW steel pipe or spiral welded pipe, you are one of the splendid note among the song.     When we listen to the whole song, we can feel the whole process making this song of steel pipe’s growth.     At the founding of New China, there is no doubt that every kind of production equipment for steel pipe would be limited. And high quality seamless steel pipe would need high technology for it. Thus steel pipe would be our goal.     With time goes on, the advanced technology was brought in and our manufacturer had taken the professional skills. Thus not only the seamless steel pipe which costs expensively can be used for oil, gas transportation, but also the ERW steel pipe, spiral welded pipe with advanced technology can be used in the dee...

    As the saying goes that different strokes for different folks. So does for the choosing of pipes for residence and commercial places. We would like to choose the different pipes according to our taste, pipe’s function and other factors.     However, which kind of material would you like to choose for your water pipe? Here are some sharing for all of friends. No matter hot or cold water, there is system generally conveying potable hot and cold water. They are applied in drinking water supply, cooking, and cleaning within in residential, commercial, institutional, and industrial buildings.     There are several categories for pipes, such as copper pipe, CPVC pipe, galvanized steel pipe, PEX tubing, PVC pipe and stainless steel pipe. Each of them would have special power once you choose it.For example, copper is a long lasting, corrosion resistant, lightweight and strong material used in pipe’s making. However, we all know that we would decide the pipe...

    Generally speaking, clients would ask if you seamless steel pipe have this kind of standard for this specific steel pipe. However, some clients would ask which kind of end finishes for the steel pipe you have for us.     Based on this question, today we would like to have an introduce for the several basic end finishes of the steel pipe and you can choose the one your projects need.     There are five common type of metal pipe end finishes and they are Threaded and Coupled; Threaded without Coupling; Plain End - Cut Square; Beveled for Welding - 30 deg bevel; Grooved End - Cut or rolled for mechanical coupling.     http://www.xysteelpipe.com/info/Different-steel-pipe-with-different-end-finishes-808-1.htm

    people are try effort to obtain 100-year or even longer level hurricane protection for every area which is easily meeting them. Lots of places have implemented design guidelines like by using the spiral welded pipe that both good structure and economical.     First of all, due to steel pipes' hardness, it is a nice try to have concrete piles and steel pipes as the foundation for structure to against the hurricane.     What's more, due to the Geo-technical factors, we know that spiral welded pipe, with its big hole for drainage system. It can be used in hurricane place for the large quantities water supply.     In addition, compared to seamless steel pipe, spiral welded pipe would cost less than that so it is an alternative choice for engineers when they meet this kind of situation.     http://www.xysteelpipe.com/info/Hurricane-protection-with-spiral-welded-pipe-809-1.htm

    It seems like even children know that steel pipe would be applied in oil, gas, water and other liquid conveyance and distribution, construction and other general purposes by means of their wide size range. With the large requirement of various energy, there is no doubt that the demand for different steel pipe, like seamless steel pipe, ERW steel pipe, and SSAW steel pipe is increasing too.     Combined with the development of energy in China during the last decades, there is no doubt that we have got lots of change in our lifestyle. There is coal-fired power plants for energy demands. However, nowadays, the most popular energy used in family or engineering project would be the oil or gas. This means that we should get lots of pipeline for the transportation of the oil and gas for residence.     So here is the coming of various pipes with different materials like plastic, steel and other pipes. With the higher pressure taking, balance taking, it seem...

    And if you have children, you soon understand that there's an embryonic personality from birth. So does for the steel pipe like the ERW steel pipe since they are born and come into the world.     If we make a metaphor for the production of the ERW steel pipe. No doubt that each pair of parents would have different names for their kids according to their family name. So does for the steel pipe.     Under this situation, there are names of seamless steel pipe, ERW steel pipe, galvanized steel pipe, spiral welded pipe and so on among the big clan of steel pipes. Of course, like each kid has different appearance and personality, each kind of steel pipe would have its special traits when they come to the world. For example, high manufacturing efficiency, various specifications and less equipment investment would be the good manner of the welded pipe. What's more, its general strength is lower than that of the seamless tube.     http://www.xys...

    API 5L are specifications for line pipe, it is under ISO 3183:2007, petroleum and natural gas industries---steel pipe for pipeline transportation system.     Any manufacturer making equipment or materials in conformance with the marking requirements of an API standard is solely responsible for complying with all the applicable requirement of that standard. API does not present, warrant, or guarantee that such products do in fact conform to the applicable API standard.     Tolerances for SMLS steel pipe’s diameter:     For OD less than 60.3mm, diameter tolerances except pipe end is -0.8mm to +0.4mm. Pipe end is -0.4mm to +1.6mm.     For OD from 60.3mm to 168.3mm, diameter tolerances except pipe end is +/-0.0075 OD. Pipe end is -0.4mm to +1.6mm.     For OD from 168.3mm to 610mm, diameter tolerances except pipe end is +/-0.0075 OD. Pipe end is +/-0.005 OD, but maximum of +/-1.6mm.     For OD from 610mm to...

    Rebar, short for reinforcing bar, is known as reinforcement steel and reinforcing steel, it is a steel bar of steel used as a tension device in reinforced concrete and reinforced masonry structures to strengthen and hold the concrete in compression.     Concrete is strong under compression, but has weak tensile strength. Rebar significantly increases the tensile strength of the structure. Rebar's surface is often deformed to form a better bond with the concrete.     The most common type of rebar is carbon steel, typically consisting of hot-rolled round bars with deformation patterns. In practice, any material with sufficient tensile strength that is materially compatible with concrete could potentially be used to reinforce concrete, for example bamboo might be considered a viable substitution in regions where steel is not available.     Steel and concrete have similar coefficients of thermal expansion,so a concrete structural member rein...

    Steel pipe radiator, precautions manufacturers should provide water resistance characteristics of the radiator data, the maximum working pressure of the working pressure radiator 1.0MPa.     Selection points:     1) Radiator heating system should meet the working pressure and system pressure requirements, should be consistent with national or industry standards.     2) In the open heating system and high humidity rooms (such as bathrooms, swimming pool) should not just use the radiator.     3) Check the product samples identified by the standard single piece of standard heat, the working pressure is consistent with the use of demand. According to the product issued by the state unit test issued by the "heat detection report", "pressure test report", the test results and product samples identified data check (requires the product to be tested samples, the test report in the past two years ).     4) Manufacturers sh...

    Straight seam steel pipe is the production of steel plate, and spiral welded pipe is hot-rolled coil production. The rolling process of the hot strip mill has a series of advantages, and has the ability to obtain the metallurgical technology of producing high quality pipeline steel.     For example, a water cooling system is provided on the output stage to accelerate cooling, which allows the use of low alloy components to achieve specific strength grades and low temperature toughness, thereby improving the weldability of the steel. But this system is basically not in the steel plate production plant. Coil alloy content (carbon equivalent) is often lower than similar grades of steel, which also improves the weldability of spiral welded pipe. It should be noted that, since the coil rolling direction of the spiral welded pipe is not perpendicular to the axial direction of the steel pipe, the rolling direction of the steel plate of the straight seam steel pipe is...

    Quality would be the first factor for wholesale so that even for suppliers, they would make all of quality things done before they sell products for clients. Like the spiral welded pipe, they would have special testing methods for quality control before the negotiation with clients.     The following facilities are utilized for ensuring stringent quality standards. Xinyue steel, as supplier of various steel pipes, has adopted some of the testing methods for customers:     Universal testing machines(digital): This equipment is for material testing, like the mechanical properties (Ultimate tensile strength, Yield strength, Elongation).     Ultrasonic testing machine: This is for checking strip lamination and flaw detection on welds for pipes in auto mode. It is mainly used for chemical component analysis to make sure the structure's good service.     Metallurgical microscope: In order to check and evaluate the grain size and st...