Seamless Steel Pipe

 Xinyue Steel Group received an inquiry from an Asian customer. The customer needs EN10219 S355 spiral pipe, which is mainly used for piling. Customers have high needs for steel pipe welding, and SGS is required to supervise X-rays to meet EN 10246-10 R2 during the whole producing. Xinyue always insists the integrity and win-win business philosophy, persists “Customer First, Quality Priority”. Each steel pipes Xinyue produced is strictly following the standard and arrange relevant tests. Successful finished production under the supervision of SGS. We would like to express our gratitude to the quality inspector for his seriousness and responsibility, and also to our Asia customers for their support and trust. Tianjin xinyue steel group will, as always, make our efforts for the construction of the world and ensure to delivery high-quality products to all over of the world. http://www.tjxysteel.com/news/SSAW-Spiral-Steel-Pipe-Quality-Priority-840.html

 Xinyue Steel Group was found in 1980, which has many years of experience in foreign trade export, and participated in many construction pipe project and steel structure projects, bare pipes or welded with C9 and other interlock, flange, stud or other accessories. Xinyue Steel is committed to providing customers with one-stop services, products exported to Southeast Asia, the Middle East, Africa and many other countries. In June 2020, Xinyue Steel received the inquiry from a Malaysian contractor for a 3.6m out diameter spiral pipe for tunnel construction. After the professional and efficient quotation and communication of Xinyue sales team, the customer finally placed this order to Xinyue Steel. This order is the first cooperation between the two parties, based on the rigor of the project, it’s very strict to the pipe quality, all the wall thickness of pipe, welding and listing openings must be strictly in accordance with the requirements of the customer's drawings. We control the ...

　　 Spiral pipe processing means on the basis of the original spiral pipe manufactured in accordance with the requirements of the requirements of the desired product. 　　There are two common spiral pipe processing methods. 　　First, the thermal expansion method 　　1. bulging law 　　One is placed in a rubber tube, with the upper punch compression, the tube shaped projection; Another method is forming a hydraulic bulging in the middle of the tube filled with liquid, the liquid pressure of the tube to the desired shape of the drum, bellows Most of the production is used in this method. 　　2. forging method 　　By swaging machine will be part of the red end of the tube or extension, reducing the outer diameter, commonly swaging machine has a rotary, link type, roller. 　　3. The bending method 　　There are three methods more commonly, a process called stretching method, another method called stamping method, a third roller method, a roller 3-4, two fixing rollers, a steering roller, ...

　　1. The manufacturing process of the spiral tube determines that the residual stress is greater than that of the straight seam tube. Because the straight seam tube adopts the overall diameter expansion process, the residual stress is close to zero, and the spiral tube cannot do this. 　　2. The amount of misalignment of the spiral pipe weld is mostly in the range of 1.1~1.2mm, and the standard requirement is less than 10% of the wall thickness. For the thin-walled pipe, the amount of misalignment is difficult to meet the standard requirements, and the straight seam pipe does not exist. This problem. 　　3. Compared with the straight seam pipe, the spiral pipe weld seam is poor, and the stress concentration is serious. 　　4. The heat affected zone of the spiral pipe is larger than the straight seam pipe, and the heat affected zone is the key to the quality of the welded pipe. 　　5. Spiral tube geometry accuracy is poor, to the site construction, such as the counterpart, welding brin...

　　 Spiral pipe is a very widely used pipe, sometimes it may require welding, but spiral pipe exsit welding defects. 　　Under normal circumstances, weld defects of spiral pipe has porosity, undercut and crack phenomena. 　　Helical tube bubble defects: conducting spiral welded, in the center of the weld bead, there will be the situation of bubble defects, will produce this situation? Main reason is that, in the welding process is hydrogen bubbles form of residue inside the metal. How to solve this failure? Welding process, we need to clear weld the inside of the oil, water and other ingredients, but also need good drying and removing moisture, so that hydrogen does not remain inside the weld . Increasing the welding current in the welding process and the generation of the bubble can be avoided yet. 　　Spiral undercut: v-shaped groove weld edge, and along the weld centerline, said undercut. Usually undercut is inappropriate because of the current, voltage and welding speed, therefore,...

　　The use of spiral thread to the scene to identify the most useful approach to the use of joint foot, this foot is a kind of special tag root diameter of the external thread and internal thread expansion tapered bore diameter caliper, using concise, intuitive and precise. It can also apply directly associated with long-legged steel vernier caliper ruler to measure external thread root diameter, length, thread expanding cone threaded aperture control specification query. 　　Thread upright seen from the front direction can differentiate rising spiral threaded to rise to the right of the right-handed, left to rise for the left-handed. Spiral drill threaded in the production process according to API specification rules mandate the use of thread gauge thread standoff inspection, the inspection cycle by the use of a certain individual tester for drilling screw pitch and taper to be checked. 　　Drilling screw three digits indicate the method is the Ministry of Metallurgical Industry specif...

　　After the double-sided submerged arc welded pipe(dsaw pipe) is rusted, the surface of the steel is mainly polished by using a wire brush or the like, and the cleaning and preheating of the spiral pipe can remove the loose or raised scale, rust, welding slag and the like. The descaling of manual tools can reach Sa2 level, and the rust removal of power tools can reach Sa3 level. If the surface of the lsaw steel pipe is attached with strong iron oxide scale, the rust removal effect of the tool is not ideal, and the anchor depth required for anti-corrosion construction cannot be achieved. 　　On the basis of the traditional application, a new application has been added, which makes the use of the lsaw steel pipe more abundant, and at the same time reduces the use cost of the lsaw steel pipe. The radio frequency sensor provides 200 volts, 50 amps of smooth flow through the lsaw steel tube, and the experimental sample is heated by induction. The lsaw tube itself does not get hot, but the e...

　　SSAW common defects magnetic particle testing or penetration testing. Spiral pipe magnetic particle testing or penetrant testing can be effectively found that surface cracks, folding, re-skin surface defects, hairline, pinholes. For ferromagnetic materials, magnetic particle testing method should be given priority, because of its high detection sensitivity; for non-ferromagnetic material, such as stainless steel spiral pipe, is used penetrant inspection method. 　　Online austenitic steel spiral pipe, when the insulation is damaged or rain may have infiltrated the site, note that penetration testing to find stress corrosion cracking or pitting and other defects. However, magnetic particle or penetrant testing only on the outer surface of the pipe to detect internal defects in the surface of the powerless. The inner surface of the detector, especially crack type defect detection must be carried out by ultrasonic testing. 　　When the spiral pipe ends aside less resection margin, due ...