Changsha Xiangjia Metal Materical Co., Ltd.

Seamless tube   is a long strip of steel with a hollow section and no seams around it. Currently, there are more than 110 countries produce seamless tubes  in the world.   Xiangjia   is a steel pipe manufacturer in the thousands of producer. Here we'd like to talk about the characteristics of seamless tube: First, the thicker the wall thickness of the product, the more economical and practical it is. However, the thinner wall process makes the cost higher; Secondly, the process of this product determines its limited performance. Generally, seamless steel pipes have low precision: uneven wall thickness, low brightness, high cost of fixed-length, and pits and black spots. Third, the detection and shaping must be processed offline. Therefore, its superiority refect on high pressure, high strength, and mechanical structural materials.

As a conveying pipe, steel pipe can be widely used to transport oil, gas, water, and other fluids. So steel pipe is known as the "blood vessel" of industry. Steel pipe is an important material in the military industry, which can be used to manufacture gun barrels, barrels, and other weapons. With the development of aviation, missile, atomic energy, and space technology, the demand for precision, thin wall, and high strength steel pipe is increasing rapidly. A steel pipe made of a single piece of metal without any welding cracks on the surface is called "seamless steel pipe". According to the different production modes, it can be divided into cold rolled pipe, hot rolled pipe, extrusion pipe, pipe jacking, cold drawn pipe, and other types. When purchasing  seamless steel pipes , I believe that everyone has a misunderstanding: expensive is good! But in many cases, we will spend a lot of money but never achieve the desired effect. Seamless steel pipe with excellent te...

Currently, more than 85% of the world's crude oil and 99% of natural gas are transported through pipelines. The total mileage of oil and gas pipelines has exceeded 3.8 million kilometers. Compared with railway, road, waterway and air transportation,   pipeline transportation   has the following characteristics: ①High efficiency. The annual transport capacity of a 1220mm pipeline is about 100 million tons, which is equivalent to the annual transport capacity of two double-track railways. ②Low cost. The cost of transporting the same amount of petroleum products is less than half of rail transport. ③ Strong continuity. The use of closed conveying can continuous and stable operation for a long time. ④The square tube is easy to manage. It able to remote centralized control, the system automation degree is high, and the equipment maintenance is small. Pipeline transportation also has its limitations. It is not flexible and convenient as ships and other transportation, and the produc...

 1. Seamless Steel Pipe  The typical method for making  seamless tubes  is the Mannesmann method, in which a rod-like billet is heated to a high temperature, and then compressed from the periphery and perforated at the center using a tool called a "perforating mandrel". This manufacturing method is suitable for mass production. It can make large diameter steel pipe and is also suitable for thick wall steel pipe. Because there are no joints, the original properties of the material can be maintained. However, in terms of manufacturing methods, the dimensional accuracy is not very good. 2. Welded Steel Pipe  The material of  welded pipe  does not use bar billets but uses steel strips (coils). For example, for seam pipe welded with resistance welding, the process is to use the uncoiler to continuously pull out the steel strip and make it cylindric. The joint part of the cylinder is changed into a high-temperature state with a large current, and the joint i...

Flanges   are the interconnected parts between the shaft and the shaft, which are used to connect pipe ends. Below is the classification of flange according to the machinery (JB) industry industry standard, national (GB) standard, chemical industry (HG) industry standard, petrochemical (SH) industry standard, let's take a look. 1. According to the machinery (JB) industry standard: integral flange, butt welding flange, plate flat welding flange, butt welding ring plate loose flange, flat welding ring plate loose flange, flanging ring plate loose flange, flange cover. 2. According to the national (GB) standard, it is divided into: integral flange, threaded flange, butt welding flange, flat welding flange with neck, socket welding flange with neck, butt welding ring with neck loose flange, plate flat flange Welding flange, butt welding ring plate loose flange, flat welding ring plate loose flange, flanging ring plate loose flange, flange cover. 3. According to the chemical industry (H...

Crushing is one of the surface defects of   welded pipes . It is damage caused by the roller hole to the surface of the tube blank. There are many types of crushing, but there are various reasons for it. Next, we will talk about what may casuse crush to welded pipe. (1) Adjust the bottom line of a pair of rollers to be higher than the rolling bottom line makes the rolling line will produce uneven fluctuations; (2) The vertical roller is too tight; (3) Elevation of vertical roller; (4) The new hole may be that the chamfer of the hole edge is too small or the chamfer does not meet the requirements; (5) The high-strength tube blank has greater resilience and deformation resistance, and the edge of the hole is easy to bite into the tube blank; (6) The vertical roll before the flat roll is not enough to exert force on the tube blank, so that the wider tube blank enters the fixed width of the flat roll hole, and the tube blank is "cut" by the hole pattern; (7) The flat roll is low,...

There are two types of galvanizing for   seamless steel pipes : hot-dip galvanizing and electro-galvanizing. Hot-dip galvanizing has wet method, dry method, lead-zinc method, redox method, etc. The difference between them is that what is used to activate the surface of the pipe body to improve the quality of galvanizing after the steel pipe is acid dipped and cleaned. The dry method and redox method are mainly used in the production. The surface of the zinc layer of electro-galvanizing is very smooth and dense, with uniform structure which make steel pipe has good mechanical properties and corrosion resistance. Electro galvanizing is complex on technically, it is used for single-sided coating, double-sided coating with different thicknesses on the inner and outer surfaces, and galvanizing of thin-walled pipes. Changsha Xiangjia Metal Materical Co., Ltd.  specializing in the production and sales of seamless pipes, alloy pipes, stainless steel pipes, etc., welcome to call us fo...