Changsha Xiangjia Metal Materical Co., Ltd.

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 for consult

Fluid Seamless Steel Pipe is a kind of long steel with hollow section and no joint around it. Currently, there are more than 5,100 manufacturing factories of more than 1,850 companies in more than 110 countries. Among them, more than 260 plants of more than 170 companies in 44 countries manufacture kerosene pipes. The applications of  seamless steel pipe  are very wide. The seamless pipe of normal function is rolled by general carbon structural steel, low alloy structural steel, or alloy structural steel. It should be used as pipes or spare parts for fluid transport. The credentials are provided in three categories: a. According to chemical factors and machine function; b. According to machine function; C. Provided by hydraulic test.  Fluid pipes  supplied in a and b shall also be subjected to hydrostatic tests if they are to be subjected to liquid pressure. Seamless tubes with special functions include seamless pipe for boiler, seamless pipe for geology and seamless pipe for kerosene,

Structural seamless steel pipes   are used for the processing and use of mechanical structures. The representative materials of structural seamless steel pipes are carbon steel 20, 45#, alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, etc. The application of fluid seamless steel pipe is for fluid transportation. In terms of manufacturing, domestic steel pipes are made of 10#, 20# carbon steel hot-rolled pipes or cold-drawn pipes. The difference between fluid seamless pipe and structural seamless pipe is that the fluid seamless pipe needs to do hydraulic experiments one by one or do ultrasonic, eddy current, and magnetic flux leakage flaw detection. Therefore, in the standard selection of pressure pipeline steel pipes, it is more suitable to use fluid seamless steel 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 for consultation.