ERW Steel Pipe

　　The seamless pipe line is mainly used for pumping high pressure oil and gas near the wellhead. As the corrosion problem of hydrogen sulfide is becoming more and more serious, the development of anti-sulfur seamless pipeline tube is urgent, and the anti-sulfur performance is the key. Discusses the influence of hydrogen induced crack (HIC) resistance of medium and material factors, Cu, Ni join can improve the performance of seamless line pipe material HTC reduce the S content in the steel, by spraying calcium silicon powder also can reduce the sensitivity of hydrogen bubble. 　　With the development of oil and gas exploration, the problem of hydrogen sulphide corrosion is very acute because of the increasing amount of oil and gas Wells in the complex and sulfur environment. In recent years, there has been an increase in demand for the seamless pipe line. The seamless pipeline pipe is mainly used for pumping high pressure oil and gas near the wellhead, and it is made by seamless tube p...

　　OCTG casing and tubing is a kind of popular steel pipe in the steel industry, but there occurs decarburization phenomenon for the OCTG tubing and casing. Then what do we take the measures to avoid decarburization for them? 　　Generally, there are two ways to avoid decarburization for OCTG casing and tubing. One is the common and simple way: make full use of nitrogen protective to sustain the pressure inside the furnace. According to proportion, workers can join or inject into the neutral nitrogen to the furnace, which will not only prevent the outside air decomposing into oxygen and water vapor into the debris but also disperse the gas existing oxidation in furnace effectively. Without reaction medium with the surface of carbon, decarburization would not happen and the area of the decarburization also can be reduced generally. 　　Another way is to make the balance to control furnace carbon dioxide levels according to the OCTG tubing and casing workpiece. Expert research if the bala...

　　The internal and external area of the pipe can both be corrosive because of different factors. The external pipeline corrosion can mainly due to the surroundings, such as acid soil, wet conditions and so on. Factors that lead to internal corrosion are the oxygen content, temperature, pressure and flow rate of the liquid carried in the pipelines. Due to the above reasons, the anti-corrosive pipeline coating can be put into two corresponding categories, the internal and external corrosion-resistant coating. 　　 Internal anti-corrosion coating 　　Oil and gas liquid carried by the pipelines contains various chemical solid particles, some of which dissolve in the fluid while some remain. Those chemical particles remaining in the fluid travel in the pipe at a high speed, therefore, the internal coating is supposed to withstand friction caused by the fast moving particles. Besides, the internal coating material is expected to have a low surface roughness, thus, increasing the flow efficie...

　　Beveling ends can be made into various angles, achieving the better welding seam. Common beveled ends for butt joints are I—Type butt joint, single—V beveled end, double—V beveled end and single U—beveled end. 　　Beveled angle refers to the angle between the two beveled surfaces. Beveled face angle, normally used for single-U type, refers to the angle between the beveled surface and the vertical line to the pipe itself. The root opening refers to the gap between the roots of both pieces before welding, to ensure the roots get complete welding. The root radius for single-U beveled end is to increase the transverse space between the roots, making the welding reach the bottom of the root. 　　I—type butt joint, also called square butt joint, is a relatively simple joint method for pipes of 1 to 6 mm in thickness. Strictly speaking, it is not a beveled end joint, for it only requires parallel matching the edges of two pieces together without certain angles. It is easy and economic to pr...

　　Seamless steel pipes and welded pipes are mainly formed by different molding processes. Ordinary steel pipes, such as tap water pipes, are usually welded by bending the flat plate. You can find a weld on the top; the coarser diameter is usually a spiral weld. The seamless steel pipe is generally formed by laminating molten steel in a molten state through a ring slit and then being subjected to a stretching process, so that there is no weld. 　　In terms of performance, especially the pressure bearing capacity is greatly improved compared with ordinary steel pipes, so it is often used on high-voltage equipment. Such as the piping connection of hydraulic equipment. The weld joint of ordinary steel pipe is its weak link, and the weld quality is also the main factor affecting its overall performance. People who have lived in the north generally have experienced the experience of freezing water pipes or heating pipes in the winter. The places where the explosions are usually welded. 　　T...

　　Pipe fluid seamless pipe cutting methods include shearing, breaking, sawing, flame cutting and anode cutting. Their characteristics are as follows: 　　(1) Flame cutting method: This cutting method has the lowest operating cost, but the fluid seamless tube consumes more and the cutting quality is poor. Therefore, manual flame cutting is often used as a supplementary cutting means. However, due to the improvement of flame cutting technology, some factories have used automatic cutting with a multi-head flame cutting machine as the main method for fluid seamless pipe cutting. 　　(2) Shearing method: This method has high production efficiency and low cutting cost. Carbon-carbon seamless pipes and alloy structural steel pipes in low-carbon species are mainly cut by shearing. In order to improve the shearing efficiency, the double-cutting is carried out by using a large-tonnage shearing machine; in order to reduce the flattening degree of the end portion of the steel pipe when cutting, th...

　　ASTM A179 cold drawn seamless carbon steel pipe is mainly used in various sectors of the metal structure facilities, mainly after the rust of steel pieces immersed in 440 ~ 460 ℃ melting zinc solution, so that the steel surface attached to the zinc layer, which play a preservative purpose. This is an effective way of metal corrosion, the use of the main features are the following: 　　1. ASTM A179 cold drawn seamless pipe manufacturers with thick dense dense zinc layer covered in the cold drawn seamless tube surface, it can avoid cold drawn seamless 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 to form a layer of thin and dense zinc oxide surface, it is difficult to dissolve in water, so the steel matrix plays a protective role. If zinc oxide and other components of the atmosphere produce insoluble zinc salt, the anti-corrosion effect is more desirable. 　　2. With iron - z...

　　 Stainless welded steel pipe is used for many different applications because of its non-corrosive surface, light weight, ease of cleaning and looks. You can use welded steel pipe well, because of stainless welded steel pipe is durable nature; there are few precautions to take when handling stainless welded steel pipe. There are, nevertheless, some suggestions to stick to be positive you get the most out of people pipes. The first step, you can wipe the stainless metal pipe along with a clear rag and cozy drinking water to eliminate any dirt and essential oil from the surface area. Dirt and essential oil can influence the corrosiveness of the pipes, so it is crucial to eliminate them prior to set up. Soon after the pipe has been wiped along, rinse it with drinking water and dried out the pipe with a clear cloth. 　　Then put on cloth or rubber gloves when managing stainless metal pipes to stay clear of leaving finger essential oil on the surface area of the pipe. If any finger essent...

　　Frequency straight seam resistance welding steel is hot-rolled coil after molding machine, using high-frequency current skin effect and proximity effect, so that the edge of the tube is heated to melt under pressure welding squeeze rollers role to achieve production. 　　 Advantages of ERW steel pipe 　　1. High dimensional accuracy. Welded seamless steel pipe diameter and wall thickness than the deviations smaller, and this is because the steel strip forming the pipe is easy to control, the high dimensional accuracy. 　　2. Good mechanical properties. Since the pipe is easy to control with a steel rolling, with the development of welding technology and on-line heat treatment technology, the weld properties can be controlled, so straight seam electric solder seamless steel pipe elongation higher than the 8% -10%, which is due to overcast straight seam welded pipe seamless low-carbon ratio of about 12%. 　　3. High concentricity straight seam resistance welding steel pipe, uniform thi...

　　Firstly, before the selection of 304 stainless steel pipe , you should consider its usage and environment. We often use weld pipe for decoration, seamless steel pipes for fluid delivery, sanitary stainless steel pipes for medical or kitchen, thick-walled steel pipes for pressure. 200 series material can be used for indoors and 304 can be used for outdoors. In the alkaline or coastal areas, level over 316 materials are generally used. 　　Secondly, the selection of 304 stainless steel pipes must be standard. From the price analysis, if the 304 stainless steel pipe is lower than 301, then you should carefully identify. It is likely replaced by other materials. Recognize whether the surface has the material words "304", and obtain the quality certificate from manufacturer. Use acid reagent for test, 304 stainless steel pipes will not change color after 30 seconds but 201 will get black. If you need to purchase in bulk, you'd better take some samples to the national authori...