Changsha Xiangjia Metal Materical Co., Ltd.

The preservatives or plating and packaging applied by the steel mills before delivery are important measures to avoid   seamless steel pipe   corrosion. Pay attention to maintenance during transportation and handling, and do not damage them. (1) Before the seamless pipes are put into storage, they should be careful to avoid rain or mixed with impurities. The pipes that have been exposed to rain or contaminated should be cleaned by different methods according to their properties. For example, a wire brush with high hardness can be used and low hardness products should use cloth or cotton etc.; (2) The seamless pipe should be checked frequently after entering the warehouse. If there is rust, the rust layer should be remove in time; ​ (3) After clean the pipe surface, there is no need to apply oil, but for high-quality steel, alloy thin steel plates, thin-walled pipes, alloy steel pipes, etc., the inner and outer surfaces of the steel pipe must be coated with anti-rust oil  ...

  1.       Grinding of the pipe mouth of  seamless steel pipe : 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 pipe. Use an angle grinder to polish the plastic layer of the nozzle.   2.       Plastic coating treatment of seamless steel pipe: 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 spread the pipe mouth with the prepared plastic powder , It should be noted that it must be smeared in place, and the flange shall be smeared 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 pl...

  Seamless steel pipe  is a long steel with a hollow section and no joints on the periphery.   Seamless steel pipes have a hollow section and are used in large quantities as pipes for conveying fluids. Compared with solid steel such as round steel, steel pipes have the same bending and torsion strength and lighter weight. They are economical cross-section steels and are widely used in manufacturing structures. Parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, bicycle frames, and steel scaffolding used in construction.   Seamless steel pipes are widely used. General-purpose seamless steel pipes are rolled from ordinary carbon structural steel, low-alloy structural steel or alloy structural steel, with the largest output, and are mainly used as pipelines or structural parts for conveying fluids.     Changsha Xiangjia Metal Materical Co., Ltd.  the Steel Pipe Division of ADTO GROUP, is one of the leading manufacturers of...

  The production process of general   seamless steel pipes   can be divided into two types: cold-drawn and hot-rolled. The production process of cold-rolled seamless steel pipes is generally more complicated than hot-rolled.   1.       The main production processes of hot-rolled seamless steel pipes: Tube billet preparation and inspection → tube billet heating → perforation → pipe rolling → steel pipe reheating → fixed (reduced) diameter → heat treatment → finished pipe straightening → finishing → inspection  △  (non-destructive, physical and chemical, bench inspection) → storage   2.       Main production process of cold rolled (drawn) seamless steel pipe: Blank preparation → pickling and lubrication → cold rolling (drawing) → heat treatment → straightening → finishing → inspection   Changsha Xiangjia Metal Materical Co., Ltd.  the Steel Pipe Division of ADTO GROUP, is one of the leading manu...

  1.         Small and medium-sized steel bars, wire rods, steel bars, medium-diameter steel pipes, steel wires and wire ropes, etc., can be stored in a well-ventilated material shed, but must be placed on top and under the pad.  　　 2.         Some small steels, thin steel plates, steel strips, silicon steel sheets, small-diameter or thin-walled steel pipes, various cold-rolled and cold-drawn steels, and high-priced, corrosive metal products can be stored in the warehouse.  　　 3.         The site or warehouse for storing spiral steel pipe products should be located 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 field, and the steel should be kept clean.  　　 4.         Large section steel, rails, steel plates, large diameter steel p...

  1.       From the perspective of being suitable for offshore oil and gas transportation, it is bound to focus on the construction of LSAW. With the development of oil exploration to the depths of the ocean, due to the impact of pressure, impact and bending forces on the pipeline laying on the seabed, flattening occurs. In order to improve the pipeline transportation capacity and ensure, the submarine pipelines are developing in the direction of thick walls, so the submarine pipelines mostly use LSAW. 2.       Coal slurry and slurry pipelines need to use LSAW. The pipeline transportation of coal and mineral powder in a "paste" state is the effective upward direction. 3.       LSAW are required for machinery, construction, and chemical engineering. The valve seat of the machinery industry manufactures the valve seat. At present, the inner hole is processed by the forging part, which is time-consuming and cos...

    The base material of  LSAW  is a single controlled-rolled steel sheet isotropic, which can be 100% non-destructive testing. The stress state of LSAW is good after forming. Due to the mechanical expansion, the internal stress can be eliminated and the geometric accuracy of the steel pipe can be improved. The internal quality of LSAW is good. Because welding is performed on a flat surface, welding conditions, automatic tracking, and non-destructive testing are easy to carry out, which results in low weld height and high accuracy of internal and external welds.   LSAW has a wide range of wall thickness, generally 6-25 mm, and the thickness can reach 45 mm.   LSAW has good bending and flattening resistance. LSAW welds are 60% shorter than spiral welded pipes, and the probability of weld defects is low.    Longitudinal seam welded pipe (LSAW) has high reliability.   Changsha Xiangjia Metal Materical Co., Ltd. the Steel Pipe Division of ADTO GR...