LSAW Steel Pipe

　　A billet is hollowed by some special technical in making seamless steel pipe. What methods can we take during the production process to give guarantee for the high quality of these pipelines? 　　There are technological parameters should be taken carefully. 　　First of all, have you ever thought about the billet heating? What’s the basic heating temperature for the entire steel rolling? 　　Then, pressure concerning would be another theme for us. High pressure water descaling, thermal centering question, perforation trouble and so on, these are points we should list them out and think about twice. 　　Of course, inner capillary surface oxide is also playing an important role during the whole production process. As it would decide the rolling resistance quality. 　　 http://www.xysteelpipe.com/info/How-to-guarantee-a-high-quality-cross-section-of-seamless-steel-pipe-1291-1.htm

　　Heat treatment is a method of changing the physical properties of high pressure boiler pipe by heating and cooling. Heat treatment can improve the microstructure of high pressure boiler pipe, so as to meet the required physical requirements. Toughness, hardness and wear resistance are obtained by heat treatment. In order to obtain these characteristics, it is necessary to adopt quenching, annealing, tempering and surface hardening. 　 　a. Quenching 　　Hardening, also called quenching, is that high pressure boiler pipe is heated evenly to the appropriate temperature, then quickly immerse in water or oil for rapid cooling, and cooling in the air or in the freezing zone. So that the high pressure boiler pipe can obtain the required hardness. 　　b. Tempering 　　High pressure boiler pipe will become brittle after hardening. And the stress caused by quenching can make the high pressure boiler pipe tapped and broken. The tempering method can be used to eliminate brittleness. Although th...

　　People always confused about when to use description of steel pipe, when to use steel tube. Moreover, you must met the situation that from different country different area, some call it pipe where some other call tube, actually for the same thing. And since they are looks like the same products, round shape, hollow in the middle, material in steel metals. Here we are talking about the different applications between steel pipe and tube. 　　Pipe has been widely applied in fluids transporting systems, oil and gas industries, thermal and high pressure services. 　　As pipe emphasize the function of transporting media which under pressure to another place, so pipe always connect with various fittings such as tees, elbows and valves. Such as standards in API 5L, ISO 3183, ASTM A106, ASTM A53, ASTM A333, etc. 　　Tube is mostly in heat exchanging systems, boiler services, vessels, tube bundle, U tubes, food industries, machinery parts etc. So the tube sizes always in less tolerances than p...

　　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...

　　Common restrictions of spiral welded pipe in welding zone are found with porosity, hot cracks, and undercuts. 　　1. Bubbles. Bubbles occur mostly in the center of the weld bead of welded steel pipe. The main reason is that hydrogen is still hidden in the weld metal in the form of bubbles. Therefore, the measure to eliminate this defect is to first remove the rust, oil and moisture of the wire and weld. And substances such as moisture, and secondly, the flux must be dried well to remove moisture. In addition, it is also effective to increase the current, reduce the welding speed, and slow down the solidification speed of the molten metal. In addition to the defects, it is necessary to first remove the rust, oil, moisture and moisture of the welding wire and the weld, and secondly, it is necessary. The flux is well dried to remove moisture. In addition, it is also effective to increase the current, reduce the welding speed, and slow down the solidification speed of the molten metal. ...

　　At present, nearly each family is equipped with different types of the pipes to deliver water, gas as well as the warm steam. They are the parts of your family, and it is necessary to repair them occasionally. Thus, how to choose the pipes you really need is important. Knowing the main differences between these two pipes will help you find out the pipes suitable for your home. The main difference between the two pipes is their basic properties. Most of the black steel pipes are iron pipes, which have high carbon as well as the ferrite. And its name black steel pipe comes from the outer black oxide cover on the surface. Ever if the black steel pipe is a type of the structural steel pipe, they are not the same completely. 　　The second difference between steel pipe and black iron pipe is their applications. For example, the welded steel pipe is often used to like your water supply system to the general water supply system, while the black steel pipe is most commonly utilized to deliv...

　　Tube mill Process description of stainless steel pipe and tube: 　　 Rolling and welding 　　Firstly, the stainless steel strips are made to go through various quality checks and are trimmed at edges. The strips pass through the number of rollers as per the required size. In the tubes-mill, the strip is gradually converted into the tubular shape. The fitted welding machine is then used to weld trim edges of the strip using TIG welding process. The scraps and inside weld bead are removed instantaneously by the Tibo machine. In this way, rolled pipes and tubes are formed. 　 　The cleaning and heating phase 　　The rolled stainless steel pipes thus manufactured are cut to the required lengths depending upon the industrial demand. These stainless pipes and tubes are then subjected to cleaning to remove the dirt. Further, a heat treatment is given to these rolled pipes and tubes to remove the stresses that may occur due to welding and formation processes. Heat treatment is given on the ...

　　Production process of spiral steel pipe is complex, but it is one of the most popular steel pipes because it can be used widely. Spiral steel pipes are produced through welding process, then what issues should be noticed in the welding process? 　　Straight seam welded pipes are simple-produced with high efficiency, low cost and rapid developed. The strength of the spiral welded pipes is generally higher than that of seam welded pipes and narrow billet can be used to produce larger diameter welded pipes, besides, the same width billet can be used to produce welded pipes of different diameter. But compared with straight seam pipes of the same length, weld length increases by 30 ~ 100%, and production speed is lower. As a result, small diameter welded pipes mostly adopt straight seam welding, while large diameter welded pipes mostly adopt spiral welding. 　　Notes in the process of spiral steel pipe welding 　　From the aspect of economic benefit, pipe fittings of spiral steel pipes s...

　　 Stainless steel pipe fitting materials can't contact with other metals directly when lifting, non-metallic materials such as wood or rubber sheet should be padded. 　　Arc striking and arc stopping of stainless steel pipe fittings: back welding method should be adopted for arc striking and must be made within the groove, arc stopping should fill arc crater. Arc striking should be avoided in the pipeline and on the surface of pipe parent metal. If defects such as holes and crack are found when arc starting and arc stopping, they should be cleaned up. 　　Arc striking and arc stopping of stainless steel pipe fittings of multi-channel multi-layer welding should be staggered. 　　Argon tungsten-arc welding can be carried out only if the inner of pipes and cavity are protected by filling argon gas before back welding of stainless steel pipe fittings, pipe fittings and stainless steel pipes, pipe fittings and stainless steel pipes, pipe fittings connection and butt joint. 　　When st...

　　ASTM A106 Grade B covers pipe sizes in NPS (National Standard Straight) from 1/8 inch to 48 inch (10.3mm DN6 – 1219mm DN1200), meanwhile complied the nominal wall thickness of the standard ASME B 36.10M. For other sizes out of the ASME B 36.10M is also allowed to use this standard specification. 　　Standards referred for making ASTM A106 Grade B seamless pipe . References ASTM standards: 　　a. ASTM A530/ A530M This is the standard specification for the common requirements of the carbon, and alloy pipes. 　　b. E213 The standard for the Ultrasonic Examination test 　　c. E309 The standard for the Eddy Current examination test 　　d. E381 The standard for the plan of Macroetch test, for the steel products the steel bars, steel billets, blooms, and forging steels. 　　e. E570 The standard for the test plan for the flux leakage test of the ferromagnetic steel pipe and pipeline products. 　　f. Related ASME Standard: 　　g. ASME B 36.10M The nominal sizes standard specification for the ...

　　ASTM steel pipe, one of the seamless steel pipe , named by American Society for Testing and Materials, would be categorized by original materials. Thus, there are so many ASTM grades for this kind of steel tubes. 　　Basically, alloy, stainless steel and carbon would be the main materials leading to the different grades for it. And this would finally decides the steel pipe’s properties, hardness, resistance to corrosion, pitting, heat treating processes and others. Here are some common grades for it. 　　ASTM A106: It covers carbon steel pipe, so it can be used widely among high-temperature service. 　　ASTM A335: This kind of type covers seamless ferritic alloy-steel pipe, which is used for high-temperature service. 　　ASTM A333: It covers wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures. 　　ASTM A312: This specification would be functioned for seamless, straight-seam welded, and cold worked welded austenitic stainless steel pipe intended f...