Changsha Xiangjia Metal Materical Co., Ltd.

 For ω (Als≤0.01%)  LSAW steel pipes , the use of two deoxidizers has small effect on tWhat is the Effect of Deoxidizer for LSAW Steel Pipe?he total oxygen content in the steel after VD treatment, and both can control ω (T.O controled below 20×10-6); Si-Al- After Ba deoxidation, lower total oxygen content can be obtained in each process, and the deoxidation effect of each process is stronger than that of Si-Ca. When using two different deoxidizers, Si-Ca and Si-Al-Ba for LSAW steel pipes, the number and size of inclusions in the smelting process are quite different. After Si-Al-Ba deoxidation, the number of inclusions in each process is less than after Si-Ca is deoxidized, the size is smaller. When two different deoxidizers, Si-Ca and Si-Al-Ba, are used for straight seam steel pipes, the molten steel undergoes obvious secondary oxidation during the casting process, but the secondary oxidation of Si-Al-Ba deoxidized molten steel is more serious. There is a big difference between the com

 In production of  rectangular steel pipe  , may meet the problem that the tube blank has delamination. To prevent this defect, we should take some measure to prevent this, as follows: (1) Optimize the cooling time: optimize the cooling process of the rectangular steel pipe slab, specially for the stacking temperature and stacking duration. If the rolled steel plate thickness≤80mm, the residence time in the cooling bed shall not over 5 minutes after the steel plate hot straightened. Steel plates with a thickness >80mm can be appropriately extended to 10 mints to ensure that the temperature of the steel plates is controlled above 500℃ before stacking. The cooling time for steel plate thickness ≤50mm is 12h; the cooling time for steel plate thickness >50mm is 24h, and it is strictly forbidden to unstack and finish in advance. (2) Optimal control the cooling process: The appearance of bainite in the rectangular steel pipe blanks is caused by the excessive cooling rate. When the cool

 There are many types of  LSAW steel pipes , and they are widely used in many fields. In the transportation process of LSAW steel pipes, you have to be carefully to avoid damage. Here we will introduce you some tips in transportation, may it help in your working.  1. In transportation of LSAW steel pipe, do not throw and drop and other violent impacts to avoid scratches and damage to the pipe. 2. In the process of operation and storage of LSAW steel pipes, should pay attention to avoid oil pollution and other chemical pollution. 3. In the process of storage the LSAW steel pipe, it should be kept away from the heat source, because the steel pipe is deformed due to the high temperature. 4. LSAW steel pipes can be stored indoors or outdoors. When in the outdoors, they need to be covered to prevent from being exposed to the sun and rain. 5. When storing LSAW steel pipes, pay attention to the horizontal and neat storage, and the stacking height should not exceed 1.5 meters. Changsha Xiangji

  Galvanized steel pipes  are divided into cold galvanized pipes and hot-dip galvanized pipes, which are welded steel pipes with a hot-dip galvanized or electro-galvanized layer. Galvanized steel pipes widely used for conveying water, gas, oil and low-pressure fluids, as well as oil heaters for chemical coking equipment, and condensation cooling. The pipes used in the heat exchanger, the coal distillation wash oil exchanger, and the pipe piles of the trestle bridge, the supporting frame pipes of the mine tunnel, etc. At present, two methods are used in the sales of galvanized steel pipes, gauge and weighing. Usually, the price of weighing is expensive than the gauge. Why? Now let’s take a look at the calculate methods. 1. Gauge calculation method The galvanized steel pipe gauge is according to the length. For example, suppose you buy 10 tons of 219*8 galvanized steel pipe. If you calculate according to the gauge, it is 10*1000/0.2466/8/211. The final result is 24 meters. This is calcul

 Classification of  rectangular steel pipe  by section shape: Simple section square pipe: square pipe, rectangular pipe. Square pipe with complex section: flower-shaped square pipe, open-shaped square pipe, corrugated square pipe, special-shaped square pipe. Classification of rectangular steel pipe by surface treatment  By surface treatment square pipes are divided into: hot-dip galvanized square pipe, electro-galvanized square pipe, oil-coated square pipe, pickling square pipe. Classification of rectangular steel pipe by usage: Square pipes are classified by purpose: square pipes for decoration, square pipes for machine tools, square pipes for machinery industry, square pipes for chemical industry, square pipes for steel structures, square pipes for shipbuilding, square pipes for automobiles, square pipes for steel beams and columns , Special purpose square tube. Rectangular pipe classification by wall thickness Rectangular pipes are classified by wall thickness: ultra-thick-walled re

 To reduce the hydrogen, oxygen, and nitrogen impurity gas content in the  rectangular steel pipe , the following eight measures can be considered to take in production: 1. Pay attention to the point that 80% of the hydrogen in molten steel comes from raw materials, refractories and moisture in the atmosphere. 2. In the control to reduce the [N] content in the rectangular tube, in addition to the vacuum treatment of molten steel and reducing the contact of molten steel with the atmosphere, the focus is on the control of alloy content. 3. Reasonable order of joining. The order of adding deoxidizer is as follows: before tapping, add a small amount of Fe-Mn in the ladle, add Fe-Si after tapping, and feed Al with a wire feeder when refining outside the refining station. 4. Control the slag composition, temperature, and slag amount to improve the ability of inclusions to dissolve in the slag phase. 5. Lowering PH2 can reduce the solubility of hydrogen in the rectangular tube, so vacuum dega