steel tube

　　The oil and chemical industry needs thousands of tons steel pipe every year. Among them, the welded tubes occupies asuitable portion. The seamless pipe can be successfully instead by welded tubes because of technique progress insteel making, rolling, welding? Owning to the cost superiority, the erw steel pipe will be used more and more inreengineering of oil and chemistry industry. 　　In recent years, there has been a trend in the world to replace high-cost seamless steel pipes with high-quality welded pipes. This is mainly due to the continuous breakthrough in the production technology of welded pipes, which is reflected in the following aspects: 　　(1) Advances in desulfurization technology have reduced the sulfur content of steel and improved the welding quality of steel pipes. 　　(2) The application of vacuum degassing technology improves the purity of the tube blank strip, reduces inclusions, and improves the quality of the weld. 　　(3) Due to the addition of special element...

　　The connection method of ssaw steel pipe is generally welded, because the welded pipe is relatively low in cost. Some projects will also use other connection methods due to factors such as construction period, construction conditions, geographical environment, etc., such as: screw connection, flange Connection, socket connection, groove connection, etc. Let's talk about the characteristics of other connection methods: 　　1: Flange connection Generally, the flange connection speed is fast, the construction is convenient, and the tool is simple. However, in terms of safety and sealing, most of the engineering requirements cannot be met. Generally, the pipeline with low pressure is often used for the connection. Such as mud pipes, etc. 　　2: Groove connection: also known as clamp connection technology, has become the first technology of current liquid and gas pipeline connection. Although this technology is developed later in China, due to its advanced technology, it is quickly Re...

　　In order to improve the seamless steel pipes for oil transportation, usually the surface should be treated for corrosion resistance. Common treatments include: cleaning, descaling, pickling, shot blasting four methods. 　　1. Cleaning. The grease, dust, lubricants, organic matter on the surface of seamless steel pipes usually can be cleaned by solvent or emulsion. But for rust, scale, welding slag can not be removed, that will need further process. 　　2. Remove rust by tools. Use a wire brush to polish the oxidation, rust, welding slag on the surface of seamless steel pipes. Tools can be divided into manual and power tools. Manual tools can reach class 2 level, power tools can reach class 3 level. For stubborn scale, it is possible can not be removed by tools, that will need further process. 　　3. Pickling. Common pickling include chemical and electrolytic methods. However, the corrosion resistance for seamless steel pipe should be chemical pickling. Chemical pickling steel surfac...

　　 Tubing has many benefits against piping. 　　1. Pipe threading or welding is difficult to disassemble and re-assemble. 　　2. Piping requires skilled worker for welding & threading. 　　3. Piping is bulky. 　　4. Tubing is assembled by simple wrench make-up on DK-LOK tube fittings reducing assembly time and the overall cost of installation. 　　5. Tubing is bendable, allowing lower pressure drop with fewer connections. This in tur 　　Careful handling and storage practices will protect tubing from unnecessary scratches, nicks and or degrading good tubing surface finish. 　　1. Tubing ends should be capped so any foreign materials will not fall inside during transportation and storage. 　　2. Do not drag across tubing rack, cement, gravel or any rough surface. 　　3. Do use correct tube cutter for tube material. The wrong cutter may result in excessive deformation of the tube end. 　　4. Do not cut deep with each turn of cutter. 　　5. Tube cutters and hacksaws should be sharp e...

　　When purchasing steel pipe fittings, it’s important to take into consideration certain factors, most importantly size and shape, to ensure that it is a perfect match for your specific purpose. However, another important aspect to consider is the material used in the making of the pipe fitters. Certain elements added to the steel, such as carbon and chrome, can dramatically affect its strength and appearance. Here are a few great reasons to invest in carbon steel pipe fittings as well as chrome plating. 　 　Durability 　　Steel is one of the most popular types of pipe fittings and has been used for construction of pipes and pipe fittings for years because of its durability and strength. However, carbon steel, or plain-carbon steel, has the ability become much stronger through heat treatment. The more carbon added to the steel, the stronger it can become, which is why it is considered one of the strongest types of steel. Another way to increase the durability is to create a harder su...

　　The cleanliness and smoothness of the seamless steel tube is a requirement for the choice of seamless steel tube. Now everyone will look at it when they buy it, which is the key to whether customers can buy it successfully. So what are the factors that lead to this? The seamless steel tube manufacturers below will tell you in detail. 　　First, the raw material factors. The poor quality of the tube blank will appear inside and outside the skin, crusting, cracks, etc.; 　　Second, the temperature factor. The first important process of seamless steel tube production is heating, poor heating (uneven, insufficient temperature, etc.) will cause internal skin, etc.; 　　Third, equipment factors. From the beginning of the furnace, each equipment component will affect the final quality of the pipe. For example, if the equipment parts are scratched, it will cause the outer skin and pits; if the punching machine is not smooth, the head of the tube blank will be bitten by water and it will be d...

　　Although the performance of the seamless steel pipe is relatively good, since the seamless steel pipe is continuously used in the state of use, it is necessary to pay attention to protection and maintenance for the seamless steel pipe. One of the most prominent problems is the maintenance that everyone said. Because of the maintenance of seamless steel pipes, we must pay attention to various problems. For corrosion protection, we must take various measures to prevent them. Why should we prevent corrosion for seamless steel pipes? What is the specific process of anti-corrosion? 　　First: why the seamless steel pipe is preserved 　　Seamless steel pipe is a relatively high-end steel pipe, the price is very expensive, but after all, the raw material is also iron, it will also be long rust, which also affects the service life in the pipeline, so the seamless steel pipe anti-corrosion must be done before the pipeline construction. A process, for the seamless steel pipe is mainly to do 3...

　　Boiler steel pipes includes medium pressure boiler pipe and high pressure boiler pipe, it is often manufactured in seamless procedures, welded steel pipe is not applicable. It has been widely used at heat exchanger pipe and tubing services, tube exchanger bundle, high pressure boiler, economizer, super heater, petrochemical industry pipes, etc. 　　Boiler pipe materials and standards 　　Standards and material for steel pipe is available at carbon, alloy, and stainless steel material. 　　Carbon steel: ASTM/ASME A/SA 106, ASTM A179, ASTM A192, ASTM/ASME A/SA 210, ASTM A333 Gr 1, 6,7 to Gr 9, 　　Alloy steel: ASTM/ASME A/SA 213 T1, T2, T5, T9, T11, T12, T22, T91, T92; ASTM A335 P1, P2, P5, P9, P11, P12, P22, P91, P92 　　Stainless Steel: ASTM A268, ASTM A213, TP304/L, TP316/L, 310S,309S,317,317L,321,321H, and duplex stainless steel material etc. 　　Common Sizes: OD from 6mm to 1240mm, thickness from 1mm to 50mm 　　Types: Straight boiler pipe, and U boiler steel pipe for tube exchan...

　　Solid CRA lined pipes or CRA clad (cladding) pipes are known to be corrosion-resistant that consists of an inner pipe which is also corrosion-resistant and a carbon steel outer pipe which can withstand external and internal pressure. There are various applications of pipes made from CRA material and include subsea pipelines for conveying sour gas and oil, saltwater pipelines, water reinjection systems, process pipes in the chemical industry, salt water pipes and much more. 　　These CRA lined and clad steel pipes are majorly used as: water injection pipelines, interfield pipelines, riser pipelines, flow-lines 　　In bonding the CRA material to carbon steel pipe, there are two methods: 　　1.Metallurgical bond (for CRA Clad (caldding) pipes) – Cladding of plates (metallurgical bond between 2 different metals) is carried out by various operations such as coextrusion, hot rolling, explosive bonding or weld overlay. The major problem with metallurgical bonding is the high costs which is...

　　 Stainless steel seamless pipes treatment technology refers to the processing of achieving uniform silver, and has a metallic luster. This is generally referred to the production of large stainless steel seamless pipes. Because large stainless steel seamless pipe is manufactured through stamping, folding and welding process, the surface of workpiece has oil, rust, macular, which is neither beautiful, and easy to rust, reducing its stainless steel quality and value. 　　To make stainless steel seamless pipes achieve the standard, the surface must be finished. After forming matte treatment, that can achieve beautiful appearance, but also improve its anti-corrosion and anti-discoloration performance. After the above method, the corrosion resistance of stainless steel seamless pipes can be increased by 2 to 3 times. 　　Stainless steel seamless pipes does not rust due to the existence of chromium, nickel components, and then through the matt treatment, not only can eliminate the matrix ...