Changsha Xiangjia Metal Materical Co., Ltd.

1. Hemispherical head Advantages: Minimum surface area, small thickness required, and large pressure-bearing capacity. 　　　 Disadvantages: The depth is large and the punching is difficult. 　　　　　 2. Elliptical head 　　　 Features: Small surface area and the standard head and the cylinder are at the same thickness with large pressure-bearing capacity, and it is easy to be stamped and formed. 　 3. Dish-shaped head Advantages: It is convenient for manual processing or stamping Disadvantages: It has larger edge stress. 4. Spherical crown head Advantages: Simple structure and convenient manufacturing. Disadvantages: There is a lateral thrust and a large edge stress. 5. Conical head Advantages: It is convenient to introduce and extract the viscous liquid or solid materials in the equipment. Also it can be used as a two-part variable diameter section on equipment with unequal diameters. Disadvantages: There is a large lateral thrust and edge stress. 6. Flat head Advantages: Easiest to manufacture

Processing methods of   straight seam steel pipe . Forging: A pressure treatment method that uses the reciprocating impact of a forging hammer or the pressure of a press to change the steel into the shape and size as required.   Extrusion: Put steel into an extruder, and one end applies pressure to extrude the metal from the specified die hole to obtain the finished product of the shape and size. It is mainly used for the production of non-ferrous metal.   Rolling: Make the billet pass through the gap between a pair of rotating rollers, and reduce the cross-section of the material while increase the length due to the compression of the rollers. Drawing: This is a processing method of drawing and rolling metal blanks (profiles, pipes, products, etc.) through a die hole to reduce the cross section and increase the length. It is usually used for cold processing. Changsha Xiangjia Metal Materical Co., Ltd.  the Steel Pipe Division of ADTO GROUP, is one of the leading manufacturers of steel

Galvanized steel pipes   and seamless steel pipes are common pipes on market. But they have essential differences. 1. Different types of pipes Galvanized steel pipe is a deep-processed product of steel pipe, which is to galvanize the outer wall or inner wall on the basis of steel pipe. The basic pipes of galvanized steel pipes include seamless steel pipes, and other welded pipes. 2. Different usages Galvanized steel pipes are commonly used in the construction industry, but seamless steel pipes can be used not only in the construction industry but also in the machinery industry. 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.

The steel pipe with the ratio of the outer diameter of the steel pipe to the wall thickness is less than 20 is called   thick-walled straight seam steel pipe . It is used as petroleum geological drilling pipe, cracking pipe for petrochemical industry, boiler pipe, bearing pipe and high-precision structural pipe for automobiles, tractors, and aviation. The biggest difference between thick-walled straight seam steel pipe and thin-walled straight seam steel pipe is the thickness of the steel pipe wall. It is generally think that the wall thickness/pipe diameter is less than 0.02 is thin-walled steel pipe, and the larger is thick-walled straight seam steel pipe.  Thin-walled steel pipe are used for pipelines. Thick-walled straight seam steel pipes are used as hollow parts, such as pressure-bearing and important pipelines. 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 manu

Since  SSAW steel pipe  are stocked outdoors, most of them are buried in the ground during use, so they are easy to corrode and rust. But once the pipeline is corroded, it will cause oil and gas leakage, which will not only interrupt the transportation, but also pollute the environment or may cause fire. So in order to ensure the smooth flow of the pipeline, the spiral pipes must have strong corrosion resistance. Reasons for the rust of the SSAW steel pipe. 1. Anti-corrosion failure. It is necessary to do a good job of anti-corrosion work or use anti-corrosion SSAW steel pipe directly. The reason why the pipeline is corroded is because the anti-corrosion layer of the pipeline is damaged.    2. The influence of external conditions. The main thing is to check the characteristics and temperature of the medium around the pipe, and whether the medium around the pipe is corrosive. If it is a long-distance pipeline, the nature of the soil environment is more complicated. In addition, the temp

 The advantages of cold drawn steel tube: (1) the size is accuracy, tolerance is small; (2) when the die hole machining is excellent, well-oiled and the surface of good quality and finish of up to seven; (3) using it to produce small-diameter steel pipe and a special section; (4) cold contribute to grain refinement of metals, together with the appropriate heat treatment to obtain good mechanical properties of steel pipe; (5) The equipment is simple, flexible production methods, and to facilitate the replacement of species. In addition, forming speed high yield without damage coating made various section forms meet the use conditions; cold rolled Steel great plastic deformation improve steel yield points. 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 faci

1. Calculate the compressive stress, which is the compressive stress generated by the vertical pressure acting on the cross section of the   rectangular tube . The pressure (in N) divided by the cross-sectional area of the rectangular tube (in m squared). As long as the compressive stress is less than the allowable stress of the material. 2. The stability must be calculated when the square tube is under pressure. It depends on whether the connection method is fixed at both ends or fixed at one end and hinged at the other end. Simple calculation of critical pressure: P=(4*n*Pi^2*E*I)/[(L/2)^2]. The number of n columns, pi^2 is the second power of the shot, E modulus of elasticity, I moment of inertia, and L column length. They are simple calculations. Safety factors and seismic loads also should be considered. You need to analyze it in different specific situation and look for professional advise. Changsha Xiangjia Metal Materical Co., Ltd.  the Steel Pipe Division of ADTO GROUP, is one

Elbows   are pipe fittings used to change the direction of the pipeline. Stamping elbow is a kind of elbow, and its plastic processing tends to produce the following quality defects, especially in the bending of pipes. 1. The wall thickness becomes thinner and wrinkles. For example, the thickness of the outer wall of the bending deformation zone will become thinner. The part with the largest amount of thinning is at the place of maximum deformation. When the thinning is excessive, the pipe will be broken. The thickness of the side wall in the bending deformation zone will increase. If the degree of deformation is too large, the inner tube wall will lose stability and thicken, and wrinkle in severe cases. 2. Distortion of cross-sectional shape In the pipe bending process, if necessary measures are not taken (such as filling material in the pipe or placing a mandrel support, etc.), the cross section of the bent pipe will easily become elliptical without internal support. Therefore, in or

Welded pipe can be divided into three types according to production process: spirally submerged arc welding (SSAW), longitudinally submerged arc welding(LSAW) and electric resistance welding(ERW). We will focus on the production process of   SSAW steel pipe   here. 1. Raw materials of spiral steel pipe are strip coils, welding wire, and flux. 2. The strip undergoes leveling, edge trimming, edge planing, surface cleaning and conveying, and pre-bending treatment before forming. 3. The welding seam gap control device is used to ensure that the welding seam gap meets the welding requirements, and the pipe diameter, the amount of misalignment and the welding seam gap are strictly controlled. 4. After cutting into single steel pipes, the first three of each batch of steel pipes shall undergo a strict initial inspection system to check the mechanical properties, chemical composition, fusion status of the welds, the surface quality of the steel pipes and pass non-destructive inspections to ens

The characteristics of   LSAW steel pipes : 1. After the mechanical expansion treatment, the internal stress of the steel pipe is small and evenly distributed, which can effectively prevent stress corrosion cracking and convenient for on-site welding construction.   2. It adopts the pre-welding and finishing welding process, the welding process is stable and the welding seam quality is high.   3. Weld seam are easy to realize non-destructive flaw detection in the production process and non-destructive flaw detection in the field during use.   4. Compared with non-straight welded pipes, the weld seam is shorter and welding defects is small.   5. The range of product specifications is large, which can produce steel pipes with small diameter and large wall thickness as well as large diameter and large wall thickness. 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 manufact