Changsha Xiangjia Metal Materical Co., Ltd.

  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-...

Induction welding is to put one or more turns of induction coil outside the   welded steel pipe . The effect of multi-turn is better than single-turn, but it is more difficult to manufacture and install multi-turn induction coil. If the distance between the induction coil and the steel pipe surface is small, the efficiency is higher, but it is easy to cause electric discharge between the induction coil and the pipe.  Generally, it is advisable to keep the induction coil 5-8 mm away from the surface of the steel pipe. When using induction welding, since the induction coil is not in contact with the steel plate, there is no wear, and the induction current is relatively stable, which ensures the stability during welding. The surface quality of the steel pipe during welding is good, and the weld seam is flat. For precision pipes, induction welding is basically used.   Changsha Xiangjia Metal Materical Co., Ltd.   the Steel Pipe Division of ADTO GROUP, is one of the leadi...

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...