Changsha Xiangjia Metal Materical Co., Ltd.

High-frequency straight seam electric-resistance welded (ERW)   steel pipes are a versatile and reliable solution for a wide range of industrial applications. Their unique manufacturing process, superior weld quality, and cost-effectiveness make them a preferred choice for industries such as oil and gas, water supply, construction, and automotive. ERW pipes are widely used across multiple industries due to their strength, precision, and cost-effectiveness. Some of the key applications include: Oil and Gas Industry: ERW pipes are commonly used for transporting oil, natural gas, and other fluids. Their high strength and corrosion resistance make them ideal for both onshore and offshore pipelines. Water Supply and Irrigation: The smooth interior surface of ERW pipes ensures efficient fluid flow, making them suitable for water supply systems, irrigation, and drainage projects. Structural Applications: ERW pipes are used in construction for scaffolding, structural frameworks, and suppor...

High-frequency straight seam electric-resistance welded (ERW) steel pipe   is a type of steel pipe manufactured using a specific welding process that involves high-frequency currents. Here's a breakdown of the key characteristics: Superior Weld Quality: Unlike ordinary welded pipes, the weld in ERW pipes is formed by melting the base metal itself, resulting in a bond that is as strong as or stronger than the parent material. This ensures excellent mechanical properties, including high tensile strength and durability. Smooth Surface Finish: ERW pipes have a smooth and uniform surface, which is ideal for applications requiring precision and aesthetic appeal. The smooth surface also makes them easier to coat or paint. High Dimensional Accuracy: The manufacturing process ensures tight tolerances and consistent dimensions, making ERW pipes suitable for applications where precision is critical. Cost-Effectiveness: The high-speed welding process and minimal material waste make ERW pipes m...

In the realm of industrial manufacturing and piping solutions, choosing the right type of pipe is crucial for ensuring efficiency and durability. Two common types of welded pipes are   high-frequency welded pipes   and   ordinary welded pipes . While both serve the same primary applications, they differ significantly in their welding processes, strength, cost, and application fields. This article delves into the key differences between these two types of pipes, with a special focus on ERW steel pipes. Welding Process The most prominent difference between high-frequency welded pipes and ordinary welded pipes lies in their welding techniques.  High-Frequency Welded Pipes: The welding process for high-frequency welded pipes utilizes high-frequency induction heating. This involves the application of high-frequency electric currents that generate heat through skin and proximity effects. The edges of the pipe billets are heated and melted before being fused together under ...

" ERW steel pipe " is straight seam resistance welded pipe, English Electric Resistance Welding, short for ERW, used to transport oil, natural gas and other vapor and liquid objects The difference between ERW steel pipe and seamless steel pipe is that ERW has a weld. The seamlessness technology of ERW steel pipes is divided into geometric seamlessness and physical seamlessness. Geometric seamlessness is to remove the internal and external burrs of ERW steel pipes. With the development of seamlessness technology, The internal burr can be controlled at about -0.2mm ~ O.5mm. Physical seamlessness is to use a medium-frequency induction heating device to heat the weld area to AC3 (927°C), and then perform an air-cooling process with a length of 60m and a speed of 20m/min, and then water-cool when necessary. So far, advanced ERW units in the world have used this method to process welds. The high-quality ERW steel pipe is not only unable to distinguish the weld seam, but also has a...

  1.      Cleaning of   ERW steel pipe   The steel surface is cleaned with solvent and emulsion to remove oil, grease, dust, lubricant and similar organic matter, but it cannot remove oxide scale, rust on steel surface, flux, etc., and can only be used as anti-corrosion production   auxiliary means.   2.      If the steel surface is firmly attached to the iron oxide scale, the rust removal effect is not ideal and cannot meet the requirements of the anti-corrosion construction for the depth of the anchoring particles.  ERW steel pipe rust removal tools mainly use wire brushes and other tools to grind the steel surface, manual rust removal can reach SA2 level, power tool rust removal can reach SA3 level, can remove loose or raised oxide scale, rust, welding slag Wait.   3.      The pickling of ERW steel pipe is generally treated by chemical and electrolytic methods, which can be used as a re-tre...

ERW steel pipe  is a steel pipe with the weld seam parallel to the longitudinal direction of the steel pipe. ERW steel pipe has a simple production process, high production efficiency, low cost and rapid development.   When choosing raw materials, pay attention to:   1.      According to the quality requirements of the ERW steel pipe produced, reasonably select the steel type, specification, allowable deviation and production method of the required raw materials;   2.      The raw material of ERW steel pipe has no internal and external surface defects;   3.      The packaging of ERW steel pipe is neat and firm, and there is no loose volume and tower shape;   4.      For strips of the same batch of ERW steel pipe, the steel number, heat number and batch number should be distinguished. Changsha Xiangjia Metal Materical Co., Ltd.   the Steel Pipe Division of ADTO GROUP, is one...

  1.      Cleaning Use solvent and emulsion to clean the surface of   ERW steel pipe   to remove oil, grease, dust, lubricant and similar organic substances, but it cannot remove rust, oxide scale, welding flux, etc. on the surface of ERW steel pipe, so it is only used in defense operations as an aid.   2.      Pickling Generally, two methods of chemical and electrolytic pickling are used for pickling, and only chemical pickling is used for pipeline anticorrosion, which can remove oxide scale, rust, and old coating. Although chemical cleaning can make the surface achieve a certain degree of cleanliness and roughness, its anchor pattern is shallow and it is easy to cause pollution to the surrounding environment.   3.      Tool rust removal Mainly use tools such as wire brushes to grind the surface of ERW steel pipe, which can remove loose oxide scale, rust, welding slag, etc. The rust removal of hand too...

The advantage of this processing technology of   ERW (ERW STEEL PIPE)   is that there is a heat treatment process after welding, which eliminates the residual stress in the weld and heat-affected zone, refines the crystal grains, and has a small heat-affected zone of the weld and fast heating speed, which can greatly improve the welding speed and Welding seam quality, and can be used as blanks without pickling, shot blasting and trimming strip steel, while welding alloy steel, high alloy steel and non-ferrous metal pipes, greatly reducing the unit power consumption, with a set of welding equipment can produce Kind of ERW.  ​ Therefore, the ERW unit needs to fully utilize and expand its own advantages in order to improve product quality and develop new products.   Changsha Xiangjia Metal Materical Co., Ltd.  the Steel Pipe Division of ADTO GROUP, is one of the leading manufacturers of steel products in China. We specializes in manufacturing all kinds of steel pip...

The internal and external surface quality of   ERW steel pipe   must be inspected with naked eyes or with special equipment.  1 Of course, the simplest inspection method is manual visual inspection, but it requires a lot of manpower and labor is heavy, it is easy to make mistakes, and it is not easy to realize mechanization and automation.  2 The use of non-damage inspection methods is labor-saving and reliable, and can be mechanized and automated; therefore, it has been extensively developed. In recent years, automatic measuring instruments such as thickness gauges and optical pulse diameter gauges have been widely used in the inspection of the geometric dimensions of thick-walled seamless steel pipes. These instruments for measuring the size of thick-walled seamless steel pipes can not only be used for the inspection of finished pipes, but also can be placed on the process line for monitoring and measurement, which facilitates effective and timely control of thick-...

Contact welding involves a pair of copper electrodes in contact with the two sides of the steel pipe being welded, and the induced current has good penetration. The two effects of high-frequency current are maximized due to the direct contact between the copper electrode and the steel plate, so the welding efficiency of contact welding High and low power consumption, it is widely used in the production of high-speed and low-precision pipes. Contact welding is generally required when producing particularly   ERW steel pipes .   Changsha Xiangjia Metal Materical Co., Ltd.   the Steel Pipe Division of ADTO GROUP, is one of the leading manufacturers of steel products in China. We specializes in manufacturing all kinds of steel pipe in various grades and sizes. Years of production experience and manufacturing facilities who have a capacity of 200,000 tons per annual will ensure the good quality and competitive duration of our products.

ERW ( Electric Resistance Welding)  needs to go through a series of processes from raw materials to finished products. The production process flow mainly depends on the product variety. The completion of these processes requires various mechanical equipment and  welding, electrical control, and testing devices. These equipment and devices follow different process flows. A variety of reasonable arrangements are required. ERW mainly uses the skin effect and proximity effect of the current to make the current highly concentrated on the edge to be welded, so that it can be heated to the welding temperature in one hundredth of a second, and then pressure is carried out under the action of the squeeze roller welding.   Changsha Xiangjia Metal Materical Co., Ltd.  the Steel Pipe Division of ADTO GROUP, is one of the leading manufacturers of steel products in China. We specializes in manufacturing all kinds of steel pipe in various grades and sizes. Years of production expe...

The advantage of this processing technology of  ERW  ( Electric Resistance Welding)  is that there is a heat treatment process after welding, which eliminates the residual stress in the weld and heat-affected zone, refines the crystal grains, and has a small heat-affected zone of the weld and fast heating speed, which can greatly improve the welding speed and Welding seam quality, and can be used as blanks without pickling, shot blasting and trimming strip steel, while welding alloy steel, high alloy steel and non-ferrous metal pipes, greatly reducing the unit power consumption, with a set of welding equipment can produce Kind of ERW. Therefore, the ERW unit needs to fully utilize and expand its own advantages in order to improve product quality and develop new products.     Changsha Xiangjia Metal Materical Co., Ltd.  the Steel Pipe Division of ADTO GROUP, is one of the leading manufacturers of steel products in China. We specializes in manufacturing all ...

Generally speaking, the formulation of   ERW ( Electric Resistance Welding )   must comply with the safe operation regulations. The operator must not touch the mold during the operation of the unit, and pay attention to the direction of the outlet pipe to avoid improper operation affecting their health and safety.  　　 In addition, the operator of the welded pipe unit should pay attention to check whether the lubrication points of the unit are in place before operating the ERW, otherwise, pay attention to adding some lubricating oil to ensure the unit can operate and work normally.  　 　 During the use of ERW, pay attention to using some high-temperature-resistant synthetic composite aluminum-based grease, so as to avoid damage to the welded pipe unit. Changsha Xiangjia Metal Materical Co., Ltd.   the Steel Pipe Division of ADTO GROUP, is one of the leading manufacturers of steel products in China. We specializes in manufacturing all kinds of steel pipe in various...

  ERW  has the characteristics of high production efficiency, low cost, material saving and easy automation.  The production process is: slitting-uncoiling-strip leveling-head and tail shear-strip butt welding-loop storage-forming-welding-removing burrs-sizing-flaw detection-flying cutting-initial inspection-steel pipe straightening -Pipe section processing-hydraulic test-flaw detection-printing and coating-finished product.  The main factors that affect the longitudinal electric resistance welded steel pipe: input heat, welding pressure, welding speed, opening angle, placement position of resistance, etc.  It is widely used in water supply and drainage engineering, petroleum and natural gas engineering, and can also be used as piling pipes and bridges; pipes for docks, roads, and building structures. Changsha Xiangjia Metal Materical Co., Ltd. the Steel Pipe Division of ADTO GROUP, is one of the leading manufacturers of steel products in China. We specializes i...

 Price List for API 5L/ASTM A53 GR.B Small Diameter ERW Steel Pipe Note: Those Price are for bare pipe , based on EXW , not including shippment charge . The mose important is those price are valid in one week. If you have any question, plz donot hesitate to contact us: lily@adtooo.com

  ERW steel pipe  adopts the skin effect of high-frequency current to produce high temperature and external force extrusion at both ends of the steel plate in a short time. This is a true electrodeless metal butt. Using hot-rolled coils as raw materials, the wall thickness of ERW steel pipes can be controlled to about ±0.2mm. The end of the steel pipe adopts the American APL standard or GB/T9711.1 standard. The pipe end is cut and the conveying length is fixed. In recent years, in natural gas pipeline network projects and natural gas companies, ERW steel pipes have been widely used as the main steel pipes in urban pipeline networks. At present, ERW high-frequency straight seam steel pipe accounts for 60% of the world’s steel pipe usage With the development of the economy and energy industry, long-distance oil and gas pipelines are an important way to ensure energy. In the anti-corrosion construction process of oil and gas pipelines, the surface treatment of ERW steel pipes is ...

 In the steel pipe standard, according to different application requirements, the tensile properties (tensile strength, yield strength or yield point, elongation), hardness, toughness indicators, and high and low temperature properties required by users are specified. The mechanical properties of large diameter spiral steel pipe are: Hardness index The ability of metal materials to resist the indentation of hard objects on the surface is called hardness. According to different test methods and scope of application, hardness can be divided into Brinell hardness, Rockwell hardness, Vickers hardness, Shore hardness, micro hardness and high temperature hardness. There are three commonly used pipes: Brinell, Rockwell and Vickers hardness. Yield point (σs) For a metal material with a yield phenomenon, the stress at which the sample can continue to elong without increasing the force during the stretching process (maintaining constant) is called the yield point. If the force drops, the upp...

1. In the production process of  ERW steel pipe , how to ensure that the product quality meets the requirements of technical standards and the needs of customers? An analysis of the factors that affect the product quality during the production of steel pipes. According to the statistics of non-conforming products of Φ76mm high-frequency welded steel pipe unit in a certain month, it is believed that the factors that affect the quality of steel pipe products during the production process are raw materials, welding process, roll adjustment, roll material, equipment failure, production environment, and other reasons. aspect. Raw materials accounted for 32 .44%, below will introduce the infect of material to ERW steel pipe. The influence of raw materials on the ERW steel pipes. The factors that affect the quality of raw materials are mainly the three aspects of the unstable mechanical properties of the steel strip, the surface defects of the steel strip and the large deviations in ...

Welded pipe  are usually used for the transportation lower pressure fluids such as water, gas, air, oil and heating steam. Carbon steel wire pipe(GB3640-88) are used to protect electric wires in electrical installation projects such as industrial and civil buildings, installation machinery and equipment. ERW steel pipe  (YB242-63) is a steel pipe with welds parallel to the longitudinal direction of the steel pipe. Usually divided into metric welded pipes, welded thin-walled pipes, transformer cooling oil pipes and so on. SSAW steel pipe  for pressure fluid conveyance (SY5036-83) is a spiral seam steel pipe used for pressure fluid transfer. . The steel pipe has strong pressure bearing capacity and good welding performance. After various strict scientific inspections and tests, it is safe and reliable to use. The diameter of the steel pipe is large, the transmission efficiency is high, and the investment for laying the pipeline can be saved. It is mainly used t...

Electric Resistance Welding (ERW) pipe  is manufactured by rolling metal and then welding it longitudinally across its length.  Seamless pipe  is manufactured by extruding the metal to the desired length; therefore ERW pipe have a welded joint in its cross-section, while seamless pipe does not have any joint in its cross-section through-out its length. In Seamless pipe, there are no welding or joints and is manufactured from solid round billets. The seamless pipe is finished to dimensional and wall thickness specifications in sizes from 1/8 inch to 26 inch OD. Applicable in for High-pressure applications such as Hydrocarbon Industries & Refineries, Oil & Gas Exploration & Drilling, Oil & Gas Transportation and Air and Hydraulic cylinders, Bearings, Boilers, Automobiles etc. ERW (Electric Resistance Welded) pipes are welded longitudinally, manufactured from Strip / Coil and can be manufactured upto 24” OD. ERW pipe cold formed from a ribbon of st...