Changsha Xiangjia Metal Materical Co., Ltd.

  Seamless steel pipe  plastic coating treatment: After polishing, use oxygen and C2H2 to heat the pipe mouth on the outside of the pipe until the internal plastic layer is melted, and then the skilled worker will evenly apply the prepared plastic powder to the pipe mouth. Note that it must be applied in place, and the flange shall be painted above the water stop line. In this process, the heating temperature should be strictly controlled. If the temperature is too high, bubbles will be generated during the plastic coating process. If the temperature is too low, the plastic powder will not melt completely during the plastic coating process. The above conditions will produce plastic after the pipeline is put into use. The phenomenon of layer shedding will eventually corrode and damage the seamless steel pipe part of the pipeline. 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 special

  Seamless steel pipe   mouth grinding: After cutting, the plastic layer of the pipe mouth should be polished with an angle grinder. The purpose is to avoid melting or burning of the plastic layer during flange welding and destroying the pipeline. Use an angle grinder to polish the plastic layer of the nozzle.   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 experience and manufact

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 kinds of steel pipe in variou

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 grades and sizes. Years

  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 in manufacturing all kind

According to the classification of slag properties, the  LSAW  can be divided into two categories: acid welded pipe rod and alkaline welded pipe. The electrode whose slag is mainly acid oxide is called acid electrode. The electrode whose slag is mainly alkaline oxide and calcium fluoride is called alkaline electrode. Acid electrode: 1. Not very sensitive to water and rust, baking at 100 ～ 150 ℃  for 1h before use 2. Stable arc, AC or DC welding can be used 3. Large welding current 4. Long arc operation possible 5. Poor transition effect of alloying elements 6. The penetration depth is shallow, the weld formation is better 7. The slag is glassy and it is easy to remove the slag 8. Normal and low temperature impact toughness of weld 9. The weld has poor crack resistance 1o. The high hydrogen content of welds affects plasticity 11. Less smoke and dust during welding   Changsha Xiangjia Metal Materical Co., Ltd.  the Steel Pipe Division of ADTO GROUP, is one of the leading manufacturers of

  1.         Cleaning. Use solvents and emulsions to clean the surface of  SSAW steel pipe  to remove oil, grease, dust, smoothing agent and similar organic matter.   2.         Spray (throw) to remove rust. Generally speaking, shot blasting (sand) rust removal is mainly used for the internal and external surface treatment of the SSAW steel pipe, and shot blasting (sand) rust removal is mainly used for the external surface treatment of the SSAW steel pipe.  　   　 3.         Derusting and pickling. First, use wire brushes and other things to polish the surface of the SSAW steel pipe, which can remove loose or warped oxide scale, rust, welding slag, etc. Chemical cleaning can certainly make the appearance reach a certain degree of cleanliness and roughness, but its anchor lines are shallow and easily pollute the situation.   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

  1.         Marking with oil: Qualified  SSAW steel pipes  are coated with oil to prevent corrosion and marked according to user requirements. 2.         Leveling and milling: the original SSAW steel pipe is leveled by the anvil, and the two edges of the SSAW steel pipe are milled on both sides by the milling machine to achieve the required plate width, parallelism and slope of the plate edge. 　　 3.         Shearing forming: The SSAW steel pipe is spirally crimped along the outer edge into a tube on the production line.  　　 4.         Butt welding cutting: using advanced double-sided submerged arc welding technology for pre-welding, internal welding and external welding. The SSAW steel pipe is cut to a standard length using a plasma ruler.  　　 5.         Visual inspection: some basic parameters are checked by professional and technical personnel.  　　 6.         Ultrasonic flaw detection: 100% inspection of the inner and outer welds and the base metal on both sides of the weld.  　　 7.