LSAW Steel Pipe

    (1) Diameter and Wall thickness     JCOE can produce pipe diameter and wall thickness greater than the UOE, which is produced by the two molds and production processes of the decision. For UOE, a set of O machine mold can only produce a diameter of the pipe, and is the second process to complete the molding, pressure on the molding unit demanding, so UOE can produce a smaller diameter and wall thickness range. For JCOE, steel pipe forming is taken by bending machine step forming the bending pressure required to greatly reduce, so the power requirements of the unit greatly reduced. Therefore, in the case of the same unit pressure, JCOE can produce a greater range of wall thickness, and a set of molds can produce a variety of pipe diameter, pipe diameter can produce a greater range. Baosteel O forming machine pressure reached 72000t, is the world's largest pressure O forming one of the production wall thickness can reach 40mm. From the current domestic and intern...

    In the process of high-frequency welding steel pipe, the welding process and the control of process parameters, the placement of the induction coil and the position of the resistor have a great influence on the welding quality of the steel pipe weld.     1) Control of weld gap of steel pipe The steel strip enters into the welded pipe unit, which is formed by the forming roll, after the orientation of the guide roll, the round steel pipe blank with open gap is formed, and the squeezing amount of the squeezing roller is adjusted, ~ 3mm, and to keep the weld ends flush. Weld gap control is too large, will weld the weld caused by poor fusion or cracking; weld gap control is too small, due to excessive heat, resulting in weld burning, melting metal splash, welding quality of the weld . In this case,     2) The position of the induction coil should be placed on the same center line as the steel tube. The distance between the front end of the induction coi...

    Electric Resistance Welding (ERW) and seamless steel pipe is the biggest difference lies in the ERW if has a weld, which is the key to the quality of ERW steel pipe. Modern ERW steel pipe production process and equipment, as the international community, especially the United States and other years of unremitting efforts, making the ERW seamless steel pipe has been a more satisfactory solution. It was the ERW seamless steel pipe is divided into geometric seamless and physical seamless. Geometric seamless ERW steel pipe is to remove the internal and external glitches.     Due to the structure and tool of the inner burr removal system, the burr removal of large and medium-sized steel pipes has been well handled. The burr can be controlled in -0.2mm ~ +0.5 mm or so. Physical seamless means that there is a difference between the microstructure of the weld metal and the base metal, which leads to the decrease of the mechanical properties of the weld area, and needs t...

    Precision seamless steel pipe is a cold drawn or hot-rolled after treatment of a high-precision steel pipe. As the precision seamless steel pipe inside and outside the wall of non-oxidized layer of precision seamless steel pipe, to withstand high pressure without leakage, high precision, high finish, cold bending deformation, flaring, flattening without cracks, etc., is mainly used to produce pneumatic or hydraulic components Of products, such as cylinders or cylinders, are made of seamless tubes. Precision seamless steel pipe chemical composition of carbon C, silicon Si, manganese Mn, sulfur S, phosphorus P, chromium Cr.     Difference between precision steel pipe and seamless steel pipe     1, the main features of seamless steel pipe is no welding seam, can withstand greater pressure. The product can be very rough as-cast or cold-drawn parts.     2, precision steel pipe in recent years there are products, mainly within the hole, the o...

    Hot-rolled seamless steel pipe production is one of the important processes, the rational development of its process plan or not, a direct impact on the size of the steel pipe after rolling the surface of the precision and quality,     Unreasonable process plan will cause the inner surface of the steel pipe to produce the defects such as folding, crack and concave.     N80Q steel casing is a standard oil casing commonly used in oil (for the seamless steel pipe), the standard provisions of the finished pipe heat treatment process for quenching and tempering.     N80Q casing production process is as follows: furnace refining → continuous casting → annular furnace → perforation → continuous rolling → stepping furnace → sizing → sawing → tempering treatment → straightening → physical and chemical testing → testing → thread processing → Coupling tight → water pressure test → measuring length weighing, marking → packaging storage. The billet w...

    High-frequency welding machine can be used for metal pipe welding, for example: brass and brass, brass and steel pipe, steel pipe and steel pipe, steel pipe and iron pipe, brass and iron pipe, iron pipe and iron pipe, copper pipe and aluminum pipe , Pipe and aluminum, aluminum and aluminum tube of the butt welding, welding, welding, etc., for welding metal pipe (silver welding ring is recommended welding) advantages:     1, induction heating speed, high efficiency.     2, compared with the oxygen welding, energy saving and low cost.     3, the oxidation area is small.     4, after welding the appearance of fine, solid, full.     5, uniform heating, so no lack of welding and solder joints.     Check www.xysteelpipe.com for more info

    Difference between stainless steel thick-walled seamless tube and carbon seamless steel pipe , mainly refers to the stainless steel and carbon steel in the design rules of the differences, that is, the design rules of these two kinds of steel is not common. These differences are summarized as follows: Stainless steel design rules can not be used for carbon steel because there are three fundamental differences between stainless steel and carbon steel:     First, the cold work of stainless steel to work hardening, for example, bending anisotropy, that is: the horizontal and vertical performance is different. The strength increased by cold working may be utilized, but if the bending area is smaller than the total area and the increase is negligible, the increase in the strength may increase the safety factor to a certain extent. In this case,     Second, the stress / strain curve of different shapes, the elastic limit of stainless steel is about 50% of...