Seamless Steel Pipe

Spiral steel pipe (SSAW pipe) is a spiral seam steel pipe made of strip steel coil as raw material, extruded at regular temperature, and welded by automatic double-wire double-sided submerged arc welding process. The spiral steel pipe sends the strip steel into the welded pipe unit, and after rolling by multiple rollers, the strip steel is gradually rolled up to form a circular tube blank with an opening gap. Adjust the reduction amount of the squeeze roller to control the gap between the weld seams at 1~3mm, and make the two ends of the weld joints flush. 1. From the surface of the spiral steel pipe to see whether the production process of the spiral steel pipe is exquisite. The section of fake and inferior spiral steel pipe is oval. The reason is that the manufacturer saves raw materials, the reduction of the first two rolls of the finished product is slightly larger, the compressive strength of this spiral steel pipe is greatly reduced, and it does not meet the specifications and di...

Packaging of spiral steel pipe (SSAW pipe) 1. Spiral steel pipe packaging should be able to avoid loosening and damage during normal loading, unloading, transportation and storage. 2. If the buyer has special requirements for the packaging materials and methods of spiral steel pipes, it should be specified in the contract. If not specified, the packaging material and packaging method are optional by the supplier. 3. Packaging materials should comply with relevant regulations. If there is no requirement for packaging materials, they should meet the intended purpose and avoid waste and environmental pollution. 4. If the customer requires that the spiral steel pipes not have damage such as bumps on the outside, it can be considered to use a protective device between the spiral steel pipes. The protective device can use rubber, straw rope, fiber cloth, plastic, pipe cap and so on. 5. Thin-walled spiral steel pipes can be protected by internal support or external frame protection due to the...

 Spiral pipe (SSAW) is a welded pipe made of strip steel coil as raw material, extruded at regular temperature, and welded by automatic double-wire double-sided submerged arc welding process. How to increase the stability of spiral steel pipe 1) Small and medium-sized steel bars, wire rods, steel bars, medium-caliber steel pipes, steel wires, and wire ropes can be stored in well-ventilated sheds, but they must be covered with thatch. 2) Some small steel products, thin steel plates, steel strips, silicon steel sheets, small-diameter or thin-walled steel pipes, various cold-rolled and cold-drawn steel products, and high-priced and corrosive metal products can be stored in the warehouse. 3) The site or warehouse for storing spiral steel pipe products should be selected in a clean and well-drained place, away from factories and mines that produce harmful gases or dust. Weeds and all debris should be removed on the site to keep the steel clean. 4) Large steel sections, rails, steel plat...

Spiral steel pipes and seamless steel pipes are relatively common pipes in life, and they are used in house decoration and construction. So what is the difference between spiral steel pipes and seamless steel pipes? What is a spiral steel pipe? Spiral steel pipe (SSAW) is a spiral seam steel pipe made of strip steel coil as raw material, extruded at regular temperature, and welded by automatic double-wire double-sided submerged arc welding process. The spiral steel pipe sends the strip steel into the welded pipe unit, and after rolling by multiple rollers, the strip steel is gradually rolled up to form a round tube billet with an opening gap. Adjust the reduction of the extrusion roller to control the weld gap at 1~ 3mm, and make both ends of the welding port flush. The appearance of the spiral pipe has spiral welding ribs, which is caused by its processing technology. What is seamless steel pipe? Seamless steel pipe (SMLS) is a long strip of steel with a hollow section and no seams ar...

Spiral pipe is made by rolling low-carbon carbon structural steel or low alloy structural steel strip into a tube blank according to a certain helical angle (called forming angle), and then welding the pipe seam. It can be made with a narrower strip Steel produces large diameter steel pipes. Its specifications are expressed by outer diameter * wall thickness. The welded pipe should ensure that the hydraulic test, the tensile strength of the weld and the cold bending performance must meet the regulations. Inspection process: Raw material inspection—leveling inspection—butt welding inspection—formation inspection—inner welding inspection—outer welding inspection—pipe cutting inspection—ultrasonic inspection—groove inspection—outline dimension inspection—X-ray inspection –Hydraulic test –Final inspection In order to guarantee the products, we have formulated a comprehensive plan, on-site work procedures and inspection and test plans. Application examples of spiral steel pipes for sewage d...

Spiral welded pipe (ssaw) is a kind of steel pipe that combines low-carbon and environmentally friendly alloy structural steel and low-alloy structural characteristics into pipe material and electric welding. How can the reliability of the spiral pipe be improved in the process of adoption? When we store it, we need to ensure the upper block and the lower pad, and we need to ensure a certain amount of ventilation, so that it will not react. Also, its various parts need to be stored like that without the app installed. When storing spiral tube products, there are many requirements for the surrounding environment. The site or warehouse for storing spiral steel pipe products should be selected in a clean and well-drained place, away from factories and mines that produce harmful gases or dust. Weeds and all debris should be removed on the site to keep the steel clean. Large steel sections, rails, steel plates, large-diameter steel pipes, forgings, etc. can be stacked in the open air. In th...

Spiral steel pipe(ssaw) is a steel pipe with spiral seam, which is made of strip steel coil as raw material, often warmly extruded, and welded by automatic double-wire double-sided submerged arc welding process. It is mainly used in pipeline transportation of oil, natural gas, bridges, docks, roads, buildings and other projects. Welding is the most common connection method for steel pipes, so how are spiral steel pipes generally welded? Spiral steel pipe generally adopts advanced double-sided submerged arc welding process, which can realize welding in the best position, and is not prone to defects such as misalignment, welding deviation and incomplete penetration, and it is easy to control the welding quality. 1) The raw materials are strip coil, welding wire and flux. It has to undergo a rigorous physical and chemical inspection before it is put into use. 2) For the butt joint of the strip steel, single wire or double wire submerged arc welding is used, and active submerged arc weldin...

 Connection method of large diameter spiral steel pipe (SSAW): The common connection method of large-diameter spiral steel pipe is welding, but in some projects, threaded connection, flange connection, socket connection, groove connection and other forms are often used. 1. Welding, flange connection Welding and flange connection are traditional spiral steel pipe connection methods, which are far from meeting the market demand in terms of safety, sealing performance, cost space, and emergency repair efficiency. Scope of application: Water pipeline connection, oil and natural gas pipeline connection, chemical pipeline connection, power pipeline connection. 2. Connection of grooved pipe fittings Grooved pipe connection technology, also known as clamp connection technology, has become the first technology for liquid and gas pipeline connections. Although this technology was developed later in China than abroad, due to its advanced technology, it was quickly adopted by accepted by the m...

 Xinyue Steel Group has received any positive inquiry from Saudi Arabia . Client needs API 5L GR.B SSAW spiral steel pipe for water transportation project. We’ve quoted our program once received the inquiry. From further following up, we knew it’s a water delivery project from local government, pipes will be used on circumstance of 5-55 °C, based on this, we suggested FBE as internal coating & 3LPE as external coating. The unit length is 18meters with grooved on both end, which is another difficulty on this order. The other point which was highly stressed by client is that the coupling should be totally match with the steel pipe, which will be grooved according to client’s drawing, as these couplings will be not only used on this new project, but also will be used on their other projects which were completed already and the couplings will be for replacements. During a long time negotiation on the price, payment term, coating, standard and production control, order was finalized...

 　　8710 anticorrosive spiral pipe(SSAW steel pipe) refers to the inner wall of the spiral pipe brushed with liquid epoxy coating IPN8710 anticorrosion. It is composed of polyurethane prepolymer and epoxy resin and other products. It is usually used in daily drinking water and our food transportation. It has Corrosion resistance, hydrolysis resistance and other advantages. 　　There are many kinds of corrosive media in the water supply pipeline, including acid, alkali, salt, oxidant and water vapor. The coating must be chemically inert and resistant to acid, alkali and salt corrosion. The coating film should have a dense structure, good waterproof permeability, strong adhesion, and toughness. 　　IPN8710-1: Composed of polyurethane polyethylene, modified epoxy resin, non-toxic anti-corrosion pigments and fillers, additives, etc., cured at room temperature to form an interpenetrating network, the coating film structure is dense, acid, alkali, salt, and corrosion resistance are excellent....

    In daily life, many water pipes are used. Spiral steel pipe is one of them. When the pipe is blocked, it will not only affect our use, but also corrode some of the raw materials inside the pipe. Therefore, if the dredge is not carried out in time, it will have an adverse effect after a long time. What should I do when the spiral steel pipe is blocked?     1. Flush with water. The pressure of water is used to wash away all the blocked substances. This method is very simple, but when there are too many blocks, it will have no effect.     2. Flush with machinery. Use mechanical equipment to send high-pressure jets to flush the pipeline and loosen the sediment in the upstream pipeline, so that the dirt can be washed away.     3. Manual processing. Use corresponding tools to remove the obstruction.     Generally speaking, these three methods are used in combination, which will be more useful to help us organize and unblock.

　　L245 spiral steel pipe is made of strip steel with material L245. The standard is API SPEC. L245 spiral steel pipe is mainly used for gas, water and oil transportation in natural gas industry. What are the characteristics of this material? 　　L245 is a low-pressure fluid coiled tube with the same performance as the #20 seamless tube. 　　Mechanical properties and chemical composition of L245 　　Mechanical properties: 　　Yield strength: 245 MPa 　　Tensile strength: 415 MPa 　　Chemical composition: C: 0.26 Mn: 1.15 S : not more than 0.030 P: not more than 0.030 　　If the mark is N in the L245NB, the steel that is L245 is deformed and normalized. B means grade B steel pipe.

　　There are seven methods to preserve spiral welded pipe: 　　1) Storage space spiral steel pipe products or warehouse, should be selected in clean, smooth drainage area, away from harmful gases or dust in factories and mines. The presence on the ground to clear the weeds and all the debris, keeping a clean steel 　　2) In a warehouse not with acid, alkali, salt, cement, steel and other aggressive materials stacked together. Different varieties of steel should be stacked separately, to prevent confusion, to prevent contact corrosion 　　3) Large steel, rail, steel disgrace, large diameter steel pipe, forgings, etc., may open dumps 　　4) Small and medium steel, wire rod, rebar, medium diameter steel pipe, steel wire and wire rope, etc., can be expected in a well-ventilated storage shed, but it must be the underlying thatch 　　5) Some small steel, sheet, strip, silicon, or thin-walled small-diameter steel pipes, all kinds of cold-rolled, cold-drawn steel products and high prices, corr...

　　The specification puts forward clear requirements for the remanence of the spiral steel pipe, so it is necessary to grasp the method of degaussing the spiral steel pipe. The communication degaussing method of spiral steel pipe is the most common method now. The spiral steel pipe communicates the degaussing process flow chart, and the coil is wound around the outer side of the steel pipe to communicate the electric current to the coil, gradually reducing the communication current until it is reduced to zero. 　　Degaussing results: The physical properties of the spiral steel pipe are not changed, but the spiral steel pipe is magnetized once the external magnetic field is encountered again. After the heat treatment process, the complete degaussing can be performed. However, after degaussing, the hardness and rigidity of the spiral steel pipe will change. When the external magnetic field is encountered in the future, the external magnetic field disappears, and the steel pipe will have s...

　　Deformation heat treatment 　　High temperature deformation heat treatment can increase the yield ratio and elastic limit of spiral steel tubes. Improve the comprehensive mechanical properties, fatigue properties and stress relaxation properties of spiral steel tubes. It reduces the ductile-brittle transition temperature of steel, reduces the temper brittleness of steel, and has the advantages of simple process and energy saving. 　　The spiral steel pipe is highly effective when it is subjected to high temperature deformation heat treatment. The specific process is as follows: heating temperature is 920-950 °C, shape variable is 10%-30% during hot rolling, air cooling time is 10-30s, oil quenching; then ordinary tempering or high temperature rapid tempering above 400 °C. 　　Ferrite state chemical heat treatment 　　The ferritic chemical treatment such as nitriding and nitrocarburizing can significantly improve the surface hardness, wear resistance, corrosion resistance, residual co...

　　Because they are stacked outdoors, and most of the steel pipes are buried in the ground, they are easy to corrode and rust. In order to ensure the smooth flow of the pipe, the spiral submerged arc pipe must have strong corrosion resistance. Once the pipeline is corroded, oil and gas leakage will occur, which will not only interrupt the transportation, but also pollute the environment and may even cause fire and damage. Spiral tube manufacturers tell you about the factors that cause spiral tube corrosion: 　　1. Anti-corrosion failure. When the pipeline is erected, it is necessary to do anti-corrosion work or directly use anti-corrosion spiral steel pipe. The reason for the corrosion of the pipeline is because the anti-corrosion layer of the pipeline has been damaged. Once the anti-corrosion layer and the surface of the pipe are detached, it will naturally cause corrosion failure. This is also the ladder type we must use anti-corrosion spiral tube when purchasing the spiral tube. 　　...

　　 SSAW steel pipe itself has no life limit, and the service life is mainly related to the operating environment and production process. Spiral steel pipe operating environment is relatively poor In order to extend the service life, the outer wall and inner diameter of the steel pipe are preserved. 　　Anti-corrosion steel pipe refers to a steel pipe that has been treated by anti-corrosion technology and can effectively prevent or slow down the corrosion phenomenon caused by chemical or electrochemical reaction during transportation and use. The anti-corrosion steel pipe can effectively prevent or slow down the corrosion and prolong the service life of the steel pipe and reduce the running cost of the steel pipe. 　　There are many steel pipeline anti-corrosion coatings in China, such as petroleum asphalt, PE jacket and PE foam jacket, epoxy coal tar pitch, coal tar enamel, epoxy powder and three-layer composite structure, and epoxy coal tar pitch cold-wrapped belt (PF type). , rubber...

　　Austempering is one of the effective quenching methods for reducing the deformation and cracking of seamed steel pipes (straight seam steel pipes , spiral steel pipes and erw steel pipes) and seamless steel pipe, but how to properly use the process should be based on the material, size, hardness and toughness of the steel pipe. The requirements for deformation, as well as the specific working conditions, etc., are reasonably selected. The following issues to be noted for the isothermal quenching of seamless steel tubes are summarized below for reference by heat treatment operators. 　　[1] For austempering of steels with low hardenability such as carbon seamless steel tubes, the quenching heating temperature should be appropriately increased, the stability of austenite should be increased, and the high temperature non-Bayesian in the isothermal process should be avoided and prevented. The transformation of the body. 　　[2] Austempering is limited by the size of steel and steel. In t...

　　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...

　　 Spiral Pipe is a strip coil as raw material, often warm extrusion molding, automatic double wire-sided submerged arc welding process welded spiral seam steel pipe. 　　(1) raw materials that strip, wire, flux. We must go through rigorous physical and chemical testing before it is put. 　　(2) strip head and tail docking, single or double wire submerged arc welding, in rolled steel by automatic submerged arc welding. 　　(3) before forming the strip after flattening, cutting, trimming, planing, surface cleaning conveyor and I crimping process. 　　(4) the use of electric contact pressure gauge to control both sides of the conveyor pressure cylinder pressure to ensure the smooth delivery of the strip. 　　(5) the use of internal or external control roll forming. 　　(6) adopted the weld gap control device to ensure the weld gap to meet the welding requirements, diameter, the wrong side and the weld gap have been strictly controlled. 　　(7) within the welding and soldering are used o...