ERW Steel Pipe

    1. Manufacturing method     (1) The use of hot-rolled steel belt to do billet, often temperature spiral molding, spiral seam using automatic submerged arc welding, internal and external submerged arc welds are not less than one.     (2) Steel pipe on the allowable to the head of the weld, steel and the end of the pipe end of the distance of not less than 300mm. The purchaser negotiates with the manufacturer to allow the head weld to be at the pipe end, but there should be a circumferential distance of at least 150 mm between the head and the corresponding tube end screw candle.     (3) Docking pipe allows the same specifications and the same type of two short section of a steel pipe, each section of the length of short steel pipe shall not be less than 2m, both sides of the ring weld seam should be staggered, the ring distance Less than 150mm.     2. The type of steel     The scope of the standard steel pipe shoul...

    When everyone purchase the SA 213 boiler tube always worry about its quality problems, there are some simple quality identification methods.     First, low quality SA 213 boiler tube prone to fold. Folding is a variety of polylines formed by the surface of the SA 213 boiler tube, which often runs through the longitudinal direction of the entire product. The reason for the folding is due to the high efficiency of the poor manufacturers, the amount of pressure is too large, resulting in the ear, the next rolling to produce folding, folding products will crack after bending, SA 213 boiler tube strength decreased.     Second, poor quality SA 213 boiler tube surface prone to scarring. There are two reasons:     1. Poor SA 213 boiler tube material is not uniform, more impurities.     2. Poor quality manufacturers guide guide equipment simple, easy to sticky steel, these impurities are easy to produce scar after the bite roll. ...

    In the past 20 years, the structure of steel pipe has been developed rapidly at home and abroad. It has been widely used in modern industrial buildings, warehouses, gymnasiums, exhibition halls, venues, terminals, stations and office buildings, hotels and other buildings. Because of its good performance, more and more widely used at home and abroad.     Pipe structure from the structure can be divided into beam structure, arch structure. From the layout can be divided into planar tube structure and space tube structure. Mainly used in two cross-section of the tube: tube and square tube. The pipe is connected to the pipe through the intersecting weld, since the treatment makes the structure more neat and beautiful. Pipe structure and the combination of cable formed by the mixed structure of the system, such as the aforementioned beam string structure to give full play to the superiority of different materials or components, is the future structure of the develo...

    The process of high-frequency welded pipe production depends on the product variety, from raw materials to finished products need to go through a series of processes, the completion of these processes require a variety of mechanical equipment and welding, electrical control, detection devices, these devices and devices in accordance with different processes with a variety of reasonable layout of the process, high-frequency welded pipe typical process: open book - strip leveling - head and tail shear - steel butt welding - live storage - forming - welding - remove the burr - sizing - initial inspection - straightening of pipe - pipe section processing - water pressure test - flaw detection - printing and coating - finished product.     High-frequency welding is the use of continuous contact with the workpiece surface of the high-frequency current generated by the heat generated by heating and in the case of the application of forging force, the workpiece metal t...

    Requirements of high pressure steel pipes' installation is similar with low pressure pipe's. However, as steel pipes supplier, for instance, SSAW steel pipe, seamless steel pipe, ERW steel pipe, Tianjin Xinyue Steel Group knows that there are detailed difference should be pay attention to for the installation of high pressure pipe's installation.     First of all, fittings, fasteners and valves should be checked before the steel pipe’s installation. As far as concerned, we know that these parts may be ignored, however, they are important part during the whole installation.     Second, relative technical files should be transported properly to the scene for guidance of the installation. As we all know, even for engineers, they should follow the instruction in the explanation to have the right installation in special places.     In addition, inner and out surface should be clean up before the installation. Clear parts would have a better a...

    No matter which kind of steel pipe, seamless steel pipe, or ERW steel pipe, or straight seamless welded pipe, there is the pipe forming demands for them in order to have the best quality when they applied in various engineering project.     Here is the list for welded steel pipe’s joint surface demands for manufacture and this would lead customers to figure out the better steel pipe too.     1. It is not allowed for cracks, pores, slag, lack of fusion, spatter during the production process.     2. Temperature would be controlled strictly. For example, we should figure out the different temperature for surface treatment about Fusion bond Epoxy coating, Coal Tar Epoxy, 3PE, Vanish Coating during the whole production.     3. It is necessary to notice that we should keep the whole temperature must not be lower than the surface of the weld surface of the pipe. For example, some of the welding reinforcement does not exceed 3mm (the...

    With the fast improvement in steel pipe’s production technology, the ERW steel pipe, which can only be produced for water and some lower pressure transmission, is now adopted in gas and oil transport too. Let’s have a view of the technical advantages of ERW steel pipe together.     1. Reducing cost of roll and roll replacement time. As we all know that we can reduce the number of roughing molding with the advanced technology for ERW steel pipe’s production, which means that we can save time. Generally speaking, the roll forming machine includes two horizontal roller frame, the inner and outer rollers for all pipe size range of products. Thus, we can save our time during production.     2. Improve quality of the steel pipe. Reducing the process would make the damage of the raw material for steel pipe’s making. And thus this would lead the the protection of the quality of the steel pipe.     3. Increasing productivity. All the above advant...

    As we all know that steel pipe is widely used in homes and constructions as railings, or guardrails for different purposes. There are various kinds of steel pipe, like API steel pipe, or American Petroleum Institute steel pipe. Like other steel products, the steel pipe will rust after exposure to moisture for long time. So, to prevent steel pipe from rust, some measures should be taken, like painting the surface with an exterior paint that seals out moisture. Follow me to get more details.     First of all, prepare things you will need, like cleaner, rags, mineral spirits, primer, rustproof exterior paint, 200-grit sandpaper. Then clean the pipe thoroughly to remove grease, dirt, grime and salt deposits. Clean the pipe by using a heavy-duty cleaner and rags. Then use mineral spirits and rag to clean it again to remove remaining grease left on the pipe.     Second, if the steel pipe has a sheeny surface that may affect the adhesion, you are advised t...

    Structural Steel Pipe     Specification:     Outer Diameter：Hot finish: 2" - 30",Cold drawn: 0.875" - 18"     Wall Thickness：Hot finish: 0.250" - 4.00",Cold drawn:0.035" - 0.875"     Length： Random Length, Fixed Length, SRL, DRL     Usage: Applicable to the general structure, mechanical structure with seamless steel pipe .     Steel Grade:     ASTM A53: Grade A, Grade B, Grade C, Type F, Type E     ASTM A519: 1010-1045, 4130-4142, 5135     GB/T8162: 10, 20, 35, 45, 16Mn, 12C rMo, 15CrMo, 12C rl MoV     JIS G3441: SCM 415 TK, SCM 418 TK, SCM 420 TK, SCM 430 TK, SCM 435 TK, SCM 440 TK     JIS G3444: STKM 11A, STKM 12, STKM 13, STKM 14, STKM 15, STKM 16, STKM 17, STKM 18, STKM 19, STKM 20     DIN 2391: St30Si, St30A1, St35, St45, St52     EN10305: E235, E355     EN 10210: S235JRH, S275J0H, S275J2H, S355J0H, S...

    ASTM A53 seamless steel pipe refers to the foreign standard steel pipe number, that is, the American mark number. A53-F corresponds to domestic q235 material, A53-A corresponds to domestic 10# material, and A53-B corresponds to domestic 20# material.     ASTM A53 seamless steel pipe is usually delivered in hot rolled state or heat treated state; hot rolled seamless steel pipe production process: pipe blank → heating → perforation → three-roller oblique rolling, continuous rolling → stripping → sizing → cooling → straightening → hydrostatic test → mark → entry lever effect seamless steel tube will be detected. Cold drawn seamless steel pipe production process: pipe blanks → heating → piercing → start → annealing → pickling → oil coating → multi-pass cold drawing → blank tube → heat treatment → straightening → hydrostatic test → marking → storage. The wall thickness of cold-drawn seamless steel tubes is even better than that of hot-rolled seamless steel tubes, a...

    The consumption of oil well pipe accounts for about 21% to 25% of the total consumption of seamless steel pipe. 90 years of consumption are between 75 to 90 million t. 1997 apparent consumption of 800,000 t, 1998 to 920,000 t. 1998 domestic oil well pipe 660000 t, the domestic market share of 72%. 2000 is estimated to consume less than 1 million t. Production capacity and apparent consumption were essentially flat. Due to the difficulties in the supply of high-performance products, the actual production is insufficient, so still need to import each year.     The required range of specifications is available. But the oil casing steel level is only J55, N80, P110, which J55, N80 accounted for more than 85%, from the actual need for more high steel level has a greater distance.     Oil industry, technological progress and focus on economic efficiency, to promote the casing to the small diameter (Φ139.7mm) transfer. Sometimes without surface casing, tec...

    With the development of the pipeline steel plate technology and the progress of welded pipe forming, welding technology, the application range of the pipe with welded pipe in gradually expanding, especially in the large diameter welded pipe class scope advantages more apparent, and cost factors, welded pipe has been dominant in the field of line pipe, which limits the development of stainless steel seamless steel line pipe.     Seamless line pipe production of about 400000, 2004, grade of steel including X42-70, varieties have a land line pipe and seabed pipeline.     Of high grade pipeline pipe production is currently a micro alloying heat treatment process, the production cost of stainless steel seamless tube was obviously higher than that of welded pipe, and with the improvement of steel grade, such as the above X80 grade pipeline steel tube limits on carbon equivalent, seamless steel tube of conventional technology is difficult to meet user requ...

    1. Seamless steel pipe for structural use (GB / T8162-1999): Mainly used in general structure, mechanical structure.     2. Seamless steel pipe for conveying fluid (GB / T8163-1999): Mainly used for conveying piping. For example: central air conditioning, cold storage, gas, fire engineering.     3. Low and medium pressure boiler seamless steel pipe (GB3087-1999): Mainly applicable to low, medium pressure boiler superheated steam pipe, boiling water pipes and other heat pipe fittings.     4. Hydraulic and pneumatic cylinder with precision diameter seamless steel pipe (GB / T8713-1988): mainly used in the manufacture of hydraulic and pneumatic cylinder and other internal and external surface roughness requirements are high, inside and outside the size of the requirements of precision fittings. For example: jack, shock absorber, motor shell, cylinder, injection molding machinery.     5. Cold-rolled seamless profiled steel pipe (...

    According to the chemical composition of the seamless steel pipe , a state organization, product section size, deficiencies that may arise after cooling, and the rolling mill, cooling equipment, space and cooling conditions after hot rolling of steel can be used with different cooling methods to cool to room temperature.     1) Air-cooled     This is the natural air cooling method, it is applied very widely. After all the air is cooled, it is not a martensitic microstructure or steel, the use of air cooling after hot rolling, such as low carbon steel, low-alloy ordinary strength steel, most of the carbon steel and alloy semi-martensitic structure steel, and austenitic stainless steel, and are using this method of cooling.     2) Rapid cooling     It is blowing, spraying, water is forced through the cooling method of steel making process is characterized by a certain period drama cooled to a temperature in the cooled natural. ...

    After a series of cold-rolled pipe has the following characteristics:     1, Through the organization of cold rolled grain fine pipe, pipe mechanical and physical properties compared with the superior;     2, Cold rolling mill for the correction capability of the original tube wall thickness deviation is large, precise geometry, low surface roughness;     3, Pass deformation larger, up to 70% -85%;     4, Cold-rolled production pipe can significantly reduce intermediate steps, such as heat treatment, pickling, beginning, straightening and cutting, to reduce the metal materials, fuel, electricity and other auxiliary materials and human consumption;     5, The method to produce cold-rolled thin wall and ultra-thin wall, inner and outer surfaces scratch-free quality pipe;     6, Be effectively rolled high-alloy, poor ductility various metal pipe.     Check www.xysteelpipe.com for more info