Seamless Steel Pipe

Xinyue’s GOST 20295 welded steel pipe is a widely used product in the Kazakhstan market. The GOST 20295 standard sets the requirements for the production and quality of straight seam and spiral-welded steel pipes for pipeline transportation of oil and gas. Xinyue Steel is one of the leading manufacturers of GOST 20295 welded steel pipes, supplying to many countries including Kazakhstan. One of the key advantages of Xinyue’s GOST 20295 welded steel pipe is its high strength and durability. The steel used in the production of these pipes is of the highest quality and undergoes rigorous quality control checks to ensure it meets the required specifications. This makes the pipes resistant to damage caused by harsh environmental conditions, which is particularly important in the oil and gas industry where pipelines are often exposed to extreme temperatures and weather conditions. Another advantage of Xinyue’s GOST 20295 welded steel pipe is its versatility. These pipes are used in various ap...

 Common surface defects of welded steel pipe: (1) layered steel Layered wall steel tube means the cross section is divided into two floors, exposed steel surface showing the hierarchical vertical cracks. Some exhibits inside and outside surfaces of steel recessed or raised locally, layered rendering suddenly raised, dents or warping in and out of the weld. (2) sticky scar Pipe sticky scar refers to internal and external surfaces of the massive steel focal adhesion plaques scar. (3) holes Pipe through the hole refers to a local steel tube bi holes exist. (4) open welding Welded steel pipe opening means through long cracks in steel welds or partial showing of. (5) Local lap welding Welded steel pipe refers to a partial outer surface of the steel pipe presents a partial arc weld. (6) Welding ditch Pipe welding groove is the outer surface of the steel pipe occurs through a long groove weld. (7) the collapse of welding Welded steel pipe collapse refers to the outer surface of the weld m...

Project location：Australia Product: Welded steel pipe Standard and material：AS1163C350L0/EN10219S355JOH Specifications：273mm-711mm Application：steel fabrication Inquiry time：2022-5-12 Order time：2022-6-30 Shipping time：2022-10-28 Estimated arrival time：2022-12-15 This customer is from Australian, it is trading customer with a long cooperation-ship for 5 years. It is required welded pipe again for this time covering specification of diameter of 273mm-711mm. The customer introduced that the purpose of this batch of steel pipes is to process them into steel structures after arrival, so the inquiry specifications are very miscellaneous, especially there are many kinds of lengths, ranging from 5.6M, 9M, 8.6M to 12M, In addition, since the steel pipes need to be galvanized after arrival, the customer specially requires that the SI content should not exceed 0.22, which is more strict than the conventional standard requirements. Customer needs are our goal, Based on our tacit understanding of ...

　　 Welded steel pipe , also called welded pipe, is a steel pipe made by welding steel plates or strips after rolling. Welded steel pipe production process is applied to seamless steel pipes. Since the 1930s, with the rapid development of high-quality strip continuous rolling production and the improvement of welding and inspection technology, more and more fields have replaced seamless steel tubes. Welded steel pipe is divided into straight seam welded pipe and spiral welded pipe according to the form of weld. 　　The blanks used for welding steel pipes are steel plates or strip steels, which are divided into furnace-welded pipes and electric-welded (resistance-welded) pipes due to their different welding processes. Because of its end shape, it is divided into round welded pipes and special-shaped (square, flat, etc.) welded pipes. Welded pipes are classified according to their materials and uses. 　　GB / T3091-2001 (galvanized welded steel pipe for low-pressure fluid transportation)....

　　High frequency welded straight-seam pipe is used in high-frequency welding of the welding method，which is based on the principle of electromagnetic induction, and AC charge in the conductor, the skin effect, the proximity effect and eddy current heating effect, so that the weld edges of the steel locally heated to a molten statewheel squeeze butt welds to achieve the crystalline aggregate indirect, so as to achieve the purpose of the welds. 　　High frequency welding is an induction welding (contact or pressure welding), it does not require the weld filler, no spatter, weld heat affected zone is narrower, welding forming beautiful, good welding machinery, etc., in the production of steel pipes by a wide range of applications, also including widely used in civil construction, petrochemical, light industry and other sectors, and to this end also to achieve the maximum benefit of the national economy! 　　Electric Resistance Welded steel pipes, ERW steel pipes or high frequency welded ...

　　Steel pipes are ideal for transporting fluids such as gas, water, air and waste. They have excellent properties, which allows them to adapt to any type of application and installation. 　　There are two types of steel pipes, seamless steel pipes and welded steel pipes. Seamless steel pipes are manufactured through the passage of liquid steel through a rod to create a hollow tube. They offer a series of advantages that guarantee the effectiveness of the process or installation. In Bestar, we share some of the main advantages: 　　Because they have a much more homogeneous microstructure, seamless steel pipes are capable of withstanding high pressure levels. 　　These tubes manage to maintain their round cross section, so the installation, as well as the addition of accessories to the pipe is much simpler. 　　Unlike seamless pipes, seamless steel pipes are much more efficient and firm. 　　These types of pipes have fewer points of failure. Therefore, pressure calculations are easier t...

　　In the process of anti-corrosion construction of oil (gas) pipelines, the surface treatment of steel pipes is the key factor determining the service life of pipelines. One of them is the premise that the anti-corrosion layer and the steel pipe can be firmly combined. According to the research institute's verification, the life of the anti-corrosion layer depends on the coating type, coating quality and construction environment. The surface treatment of the steel pipe affects the life of the anti-corrosion layer by about 50%. Therefore, it should be strictly in accordance with the anti-corrosion layer specification. The requirements of the surface of the steel pipe are continuously explored and summarized, and the surface treatment method of the steel pipe is continuously improved. 　　1. cleaning 　　Use solvent and emulsion to clean the surface of steel to remove oil, grease, dust, lubricant and similar organic matter, but it can not remove rust, scale, flux, etc. on the surface...

　　When it comes to the API, its name is definitely famous worldwide. The API refers to the American Petroleum Institute. Founded in 1919, it is the first national business association in the United States and one of the earliest and most successful standards-setting chambers in the world. As an international standard, it has long been engraved in the hearts of every steel practitioner. 　　There are a wide variety of API standards, including pipes, fittings, and steel components. The API SPEC steel pipe is roughly two parts: oil casing and line pipe. API 5L generally refers to the implementation standard for pipeline steel pipes, which are pipes used to transport oil, steam, water, etc. from the ground to oil and gas industrial enterprises. It includes two types of seamless steel pipes and welded steel pipes. The welded steel pipe pipes, which was commonly used in oil pipelines in China, are spiral submerged arc welded pipes (SSAW), straight seam submerged arc welded pipes (LSAW) and ...

　　How to ensure the quality of high frequency welded pipe in the process of production? We should take the effects of roll adjustment into consideration, except that, we also need to consider the geometric dimensions of steel strip. 　　When the width of the steel strip is less than the allowable deviation, the squeezing force of the welded steel pipe will be reduced, which will cause the welding of the steel pipe loose, and cracks or open-end pipe will appear. When the width of the strip is greater than the allowable deviation,the squeezing force will be increased when the steel pipe is welded, which will cause tip, welding or burr welding defects appearing on the weld of the steel pipe. Therefore, the fluctuation of the strip width not only affects the accuracy of the steel pipe's outer diameter, but also seriously affects the surface quality of the steel pipe. 　　About the steel pipe that requires the same section wall thickness difference does not exceed the specified value (...

　　Large diameter LSAW steel pipe, also known as welded steel pipe , is made of steel plate or steel strip after bending (electric model 0317 and check 6012755 standard) and then is made of by high-frequency welding and submerged arc welding. According to the form of seam welded steel pipe is divided into LSAW steel pipe and spiral welded pipe. According to the use it is divided into general welded pipe, galvanized steel pipe, blowing oxygen pipe, wire casing, metric pipe, roller tube, deep well pump, automotive tube, transformer tube, welded thin-walled tube, welded pipe and spiral welded pipe. 　　General pipe (manufactured by Prime Steel Pipe) is used to transport low pressure fluid. Implementation of the standard is GB/T0317 No. 6012889. It is manufactured with Q195A, Q215A, Q235A steel. It can also be made of other mild steel that is easy to weld. Steel pipe must be tested by water pressure, bending, flattening and other experiments, the surface quality has certain requirements, th...

　　The joint coefficient of the welded steel pipe is divided into two zones, one is the weld zone and the other is the fusion zone. 　　 1.Weld area 　　After the joint metal and the metal to be filled are melted, it is cooled at the fastest speed. The weld arrangement is an as-cast arrangement of liquid metal crystallization, and the composition is segregated, the crystal grains are coarse, and the arrangement is not fine. However, due to the small weld pool, rapid cooling, strict chemical composition control, carbon, sulfur, and phosphorus are low, and the weld chemical composition is adjusted by the alloy to make it rich in certain alloying elements. Therefore, the weld metal The functional problem is not big enough to be able to satisfy the function pleading, especially the strength is simple to arrive. 　 　2. Melting zone 　　A transition between the melt zone and the non-melting zone. The chemical composition of the fusion zone is not uniform, and the arrangement is coarse, often...

　　General welded pipe is used for transporting low pressure liquid. Use Q195A, Q215A, Q235A steel manufacturing. Also can be used to other mild steel welding manufacturing. Welded steel pipe for pressure, bending, flattening and so on experiment, the surface quality is a certain request, usually the delivery length is from 4 to 10 m, which often required scale delivery of the goods. Of the specifications of the welded steel pipe in nominal diameter nominal diameter is different from the actual, welded pipe with wall thickness by the regulation with ordinary steel pipe and thickening structural steel pipe, steel pipe and the form of the pipe end points with thread and don't take two. 　　Galvanized steel pipe, in order to improve the corrosion resistance of steel tube, for galvanized welded steel pipe commonly. Zinc galvanization steel tube hot dip galvanized and electrical steel, hot dip galvanized zinc coating thickness, the cost of electric is low. Oxygen tube welding is used fo...

　　Frequency welded pipe production process, affecting the quality of the elements have more than one pipe, the main raw materials, welding technology and roll count which is beginning to adjust. 　　Key to look at raw geometric dimensions. Strip geometry affect the quality of the steel strip width when less than the allowable deviation, the extrusion pressure welded steel pipe is reduced, making the pipe weld welding is not strong, cracks or open tube. When the width of the strip is greater than the tolerance, the pressing force is increased when the welded steel pipe, steel pipe welds appear beak, lap welding and other welding defects or burrs. Therefore, the fluctuation width of the strip, not only affects the accuracy of the outside diameter of the steel pipe, but also seriously affect the surface quality of the steel pipe. 　　Requirements for the same section thickness difference does not exceed the predetermined value of the steel pipe, which requires a high degree of uniformity...

　　When using steel pipe tools, we might as well avoid frequent contact with skin and eyes. In case of contact, flush with plenty of water should not last long since if irritation persists, welded steel pipe might be eroded. The beveled pipe end helps spread the solvent easily as the welded steel pipe is joined to the fitting. By doing so, all burrs should be removed from the inside as well as the outside, of the pipe ends with the help of steel pipe tools. Special pipe tools can be used quickly and efficiently along with wrenches. The special woven nylon straps are extra strong and are specially treated for slip resistance so they can provide gripping power for turning steel pipe tools. This can be achieved without scratching or deforming the pipe as long as we follow the precautionary statement of welded steel pipe. 　　What is more, we may use the pipe system with caution due to the welding torches at construction sites. In those locations, welded steel pipe is being installed and s...

　　If you ever take a look at the steel pipe production process, you will find out that molybdenum increases the resistance of welded steel pipe to both local and general corrosion. This is because molybdenum and tungsten can protect the welded pipes from eroding. For instance, when welded steel pipe is used in austenitic alloys, the application must be balanced with austenite stabilizers in order to maintain the pipe structure. At the same time, some other elements are added to welded steel pipe so as to improve high temperature strength. What is more, as experts point out, in the steel pipe production process, the use of nitrogen will help to increase strength and enhance resistance to welded steel pipe corrosion. 　　Another commonly seen metal copper can also increase the general corrosion resistance in steel pipe production process. Thus welded steel pipe can be less harmed by acids, which is good agreement with the scaling theory in which production starts to decline exponentiall...

　　When welded steel pipe is in the process of welding, there is a big potential threat which is called hot cracking that occurs immediately upon completion of the weld. Because of its larger grain structure, this material is particularly susceptible to the defect. Right filler metal, as well as proper heat input and post-weld cooling, is vital to cracking prevention and corrosion resistance during the welding process. 　　Welded steel pipe should be matched with right filler metals based on their chemical and mechanical features. Luckily, it is easier for this kind pipe to make this match than many other materials. The grade of welded steel pipe that will be used for application can be affected by the intended service condition, and the grade of material has a great influence on the filler metal selection. For example, it is better for welded steel pipe with 304L to choose filler metal with American Welding Society, but 316 welded steel pipes should be matched with a 316L filler metal...

　　Straight seam ERW steel pipe is made with hot-rolled coil, straight seam welded steel pipe can be divided into high-frequency electrical resistance welding and submerged arc welding by different welding type. Compared the welding process of submerged arc welding steel pipe, high-frequency ERW steel pipe does not add any welding materials in welding process, weld forming has not through hot-melting state, only the weld metal goes through the re-crystallization process, so the formed welding is completely the same chemistry as the base metal. Welded steel after annealing treatment, the cold working internal stress and welding internal stress are improved, so that the straight seam ERW steel pipe with good comprehensive mechanical properties. 　　LSAW steel pipe is made by hot-rolled steel plate as raw materials and doing longitudinal welded in the high-frequency welding equipment. In the welding process it will add some filler and particle protection flux to doing submerged arc weldin...

　　1. Welded steel pipe for low-pressure fluid transportation (GB/T3092-1993) is also called general welded pipe, commonly known as black pipe. It is a welded steel pipe used for conveying general lower pressure fluids such as water, gas, air, oil and heating steam and other purposes. The thickness of the steel pipe is divided into ordinary steel pipe and thick steel pipe; the pipe end form is divided into non-threaded steel pipe (light pipe) and threaded steel pipe. The specification of the steel pipe is expressed by the nominal diameter (mm), and the nominal diameter is an approximate value of the inner diameter. The welded steel pipe for low-pressure fluid transportation is mainly used as a raw pipe for galvanized welded steel pipe for low-pressure fluid transportation, in addition to being directly used for conveying fluid. 　　2. Galvanized welded steel pipe for low pressure fluid transportation (GB/T3091-1993) is also called galvanized electric welded steel pipe, commonly known a...

　　Steel pipes are classified into two types: seamless steel pipes and welded steel pipes according to their manufacturing methods. The seamless steel pipe is made of high-quality carbon steel or alloy steel and has hot rolling and cold rolling (extraction). The welded steel pipe is formed by welding a steel plate rolled into a tubular shape by a seam or a spiral seam. In terms of the manufacturing method, it is further divided into a welded steel pipe for low-pressure fluid transportation, a spiral-welded electric steel pipe, a direct-wound welded steel pipe, an electric welded pipe, and the like. Seamless steel tubes can be used in a variety of liquids, gas pipelines, and the like. Welded pipes can be used for water pipes, gas pipes, heating pipes, etc. 　 　1. Welded steel pipe 　　1.1 Welded steel pipe and galvanized welded steel pipe for low pressure fluid transportation 　　The welded steel pipe for low-pressure fluid transportation is made of carbon soft steel. It is the most com...

　　Welded steel pipe like ERW steel pipe, is now widely used among various industries. And the types of weld pressure rolls applied the pressure require for the weld are as varied as the welding units used to supply the heat. 　　Then, how many roll units are needed in steel pipe production? 　　According to different size and shape of the product being welded, the number of rolls in the weld squeeze box is proportionate. There are no hard and fast rules; however, common guidelines for round tube or pipe size ranges are as follows: 　　3/8 to 2 in. uses two-roll units. 　　1/2 to 3 1/2 in. uses three-roll units. 　　2 to 10 in. uses four-roll units. 　　Larger than 10 in. uses five or more rolls. 　　Now with the wide demands coming from customers, there are square, rectangular, hexagonal which are welded in the finished shape rather than being reshaped after being welded round. 　　 http://www.xysteelpipe.com/info/How-many-rollers-are-needed-for-steel-pipe-production-1294-1.htm