Changsha Xiangjia Metal Materical Co., Ltd.

The high quality of   seamless steel pipes   is mainly reflected in the specification accuracy and surface finish. Even after quenching and tempering, there will be no air oxide film on the surface of the pipe, nor will it be deformed by cold drawing. Sophisticated machining and manufacturing solutions are the advantages of seamless steel pipes.   Clean and maintain the surface of the seamless steel pipe to a certain extent to increase the service life of the seamless steel pipe. Many seamless steel pipes on the market will have great deviations in the model specification level. Even in different parts of seamless steel pipes, there are large differences in the inner diameter or wall thickness. Such a pipeline will undoubtedly cause a lot of problems throughout the application. But our seamless steel pipe is different, our seamless steel pipe has very strict regulations for each part of the pipeline.   Changsha Xiangjia Metal Materical Co., Ltd.   the Steel Pipe...

What are the calculation methods for the vertical bearing capacity of the  rectangular tube : 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 square). The compressive stress should be less than the allowable stress of the material. 2. Calculate the stability. The tube stability calculation is complicated. It depends on whether the connection method is fixed at both ends or fixed at one end and hinged at the other end. It is estimated that you do not only use 1 column, so it can be simply calculated as a fixed connection at both ends. Simple calculation of critical pressure: P=(4*n*Pi^2*E*I)/[(L/2)^2]. N:The number of columns; pi^2: the second power of the shot; E: modulus of elasticity; I: moment of inertia; and L: column length. Those are simple calculations. Safety factors and seismic loa...

  2 steps to deal with grease, oil, lubricating oil and other pollution on the surface of   seamless pipes : 1.       Wipe clean with a soft cloth. 2.       Clean with neutral detergent or ammonia solution or special detergent.   The stainless steel surface has rainbow patterns, which can be washed off with warm water or neutral detergent when washing. 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.

Due to the house decoration and improper protection, the residual rust in the water pipes left dotted rust spots on the   seamless pipes , we can: 1.       Scrub with toothpaste. 2.       Rinse with cold water and dry with cotton cloth.    Dust and dirt on the surface can be washed with soap, weak detergent or warm water. 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.

Use a low-concentration vinegar solution or decontamination powder to remove the spots in   seamless pipes , and finally rinse it off with clean water.   OR   If it is caused by the lumpy rust spots caused by staining with strong acid and alkali materials and not washing in time, or washing not clean: 1.        Rinse immediately with water. 2.       Use ammonia solution or neutral carbonated soda aqueous solution vinegar, stainless steel treatment agent to wash steel water, etc. 3.       Wash with neutral detergent or warm water. 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 qua...

  3 steps to solve the water tank discoloration or rust spots on   seamless pipes   caused by heavy metal water: 1.       Use stainless steel brightener (to remove surface stains and rust) to dilute 4 times. 2.       Repeatedly scrub with a towel until the rust on the surface. 3.       Rinse with hot water again, and after drying, spray anti-rust water to keep the surface smooth and clean. 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.

First of all, we must understand what is pickling: the method of using acid solution to remove oxide scale and rust on the surface of steel is called pickling. Acids for pickling include sulfuric acid, hydrochloric acid, phosphoric acid and mixed acids.  　　   The pickling process is to remove the surface oxide scale, and then go through lubrication treatment (carbon steel-phosphorous saponification, stainless steel-butter lime, copper and aluminum pipe-oiling), using the old technology-copper plating), and then drawing and deep processing. If the  seamless steel pipe  is not pickled, there may be oxides and oil stains on the surface, and the nuclear energy of the phosphating solution cannot remove them, and the quality of phosphating will be reduced. Moreover, in the manufacturing process of seamless steel pipe, after many processes, if you are not careful, it will leave scars on the surface of seamless steel pipe, which will reduce the corrosion resistance of parts ...

After the  seamless steel pipe  is finished, it is sent to the inspection department for product quality inspection, which is an important measure to ensure the quality of the seamless steel pipe from the factory. The inspection standards and content are stipulated by national standards and some standards or technical conditions.  　   Seamless steel pipe inspection can be spot check and all. Sampling inspection is generally to determine the mechanical properties, internal organization and chemical composition of seamless steel pipes. In addition to sampling inspections in a batch of seamless steel pipes, seamless steel pipes for some important uses are sometimes subject to all inspections. In addition, hot-rolled seamless steel pipes are subject to process tests such as flattening, bending, crimping, and flaring, as well as hydraulic tests according to standard requirements.     Changsha Xiangjia Metal Materical Co., Ltd.   the Steel Pipe Division of A...

  Seamless steel pipe  pipe connection: After the plastic repair is completed, the pipe and the pipe fittings are connected and installed. During the connection process, rubber pads are added between the flanges, and the bolts are tightened to the sealed state. 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.

  Seamless steel pipe  cutting: According to the actual length of the pipeline, the pipe should be cut with a metal saw or a toothless saw. When water welding is used in the cutting process, the raw materials must be protected. When cutting, fire-resistant and heat-resistant materials should be used as baffles at the two ends of the fracture to catch the sparks and hot molten iron that fall during cutting to protect the raw materials. The original plastic layer. 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.

  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 Chi...

  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.

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 slag viscosity of the  seamless steel pipe  plant is too high. The gas dissolved in the high-temperature liquid metal during welding will overflow in the form of bubbles during the cooling process. If the viscosity of the slag is too large, the bubbles cannot pass through the slag and are blocked near the surface of the weld metal to form pores. The seamless steel pipe manufacture can solve this problem by adjust the chemical composition of the flux and change the viscosity of the slag. The reason why carbon monoxide turns into pores is that the FeO and C in the molten pool of the seamless steel pipe plant have the following recovery response: FeO+C==Fe+CO This reaction is more violent when the molten pool is at the crystallization temperature, because at this time the molten pool has begun to condense and CO gas is not easy to escape, so CO pores are formed in the weld. If the welding wire contains sufficient deoxidizing elements Si and Mn, and the carbon content in the w...