Liaoyang large-diameter square tube manufacturer directly supplies the manufacturer
1. Seamless square tube electrochemical coloring method: refers to the color of the film formed by electrochemical oxidation in a specific solution. 2. High temperature oxidation coloring method: immerse the workpiece in a specific molten salt and adhere to the corresponding process parameters, so that the profiled tube can form a certain thickness of oxide film and show various colors. 3. Chemical oxidation coloring method: refers to the color of the film formed by chemical oxidation in a specific solution, including salt method, mixed sodium salt method, sulfuration method, acid oxidation method and alkaline oxidation method. The common bacteriological method is widely used, but to ensure the color difference of a batch of products, reference electrodes must be used for control. 4. Gas phase cracking coloring method: it is relatively complex, and is rarely used in the industrial consumption of seamless square tubes. 5. Chemical method of ion stacking oxide coloring method: put the stainless steel seamless square tube in the vacuum coating machine to stop vacuum evaporation coating. This method is suitable for processing large quantities of products because of its large investment and high cost.
Liaoyang large-diameter square tube manufacturer directly supplies the manufacturer
The square tube is a square tube type. Many materials can form a square tube. It is used in, for, and where. Most square tubes are made of steel tubes, mostly for construction, decoration, and construction. Square pipe (Fangtong) is a kind of square pipe, that is, steel pipes with equal side lengths. It is rolled from strip steel after processing. Generally, the strip steel is unpacked, leveled, curled and welded to form a round pipe, which is then rolled into a square pipe and cut to the required length. Usually 50 pieces per pack. Square tube (Fangtong) is also called rectangular tube, and the algorithm is (a+a) * 2/3.14 or (a+b) * 2/3.14
Liaoyang large-diameter square tube manufacturer directly supplies the manufacturer
Wall thickness grading of rectangular pipes - extra thick rectangular pipes, thick rectangular pipes, thin rectangular pipes. The thick wall rectangular pipe is a galvanized welded square pipe used for low pressure fluid escort, which is only used for ordinary low pressure fluid, mainly used for water, gas, oil, hot water or steam escort; Galvanized welded thick wall rectangular pipe for low pressure escort is mainly used to escort ordinary low pressure fluids such as water, gas, oil, hot water or steam. The surface of the square pipe adopts hot galvanizing or cold galvanizing anti-corrosion process. The rectangular thick wall mining infusion welding square tube is mainly used for mining air pressure welding, row welding, shaft drop welding, etc.
Liaoyang large-diameter square tube manufacturer directly supplies the manufacturer
Square and rectangular pipes can be divided into adhesive socket pipe fittings, elastic seal pattern socket pipe fittings, threaded joint pipe fittings and flange connection pipe fittings according to different connection modes. Pipe fittings can be divided into injection molding pipe fittings and pipe bending molding pipe fittings according to different processing methods. Reduction coefficient of nominal pressure and temperature Since plastic products are relatively sensitive to pressure and temperature, the nominal pressure (PN) of regular rectangular tube refers to the large working pressure when 20 C water is recommended. When the water delivery temperature is different, the working pressure shall be corrected according to the given reduction coefficient (f) for different temperatures, that is, the reduction coefficient shall be used to obtain the large allowable working pressure at the nominal pressure. The internal surface of various pipe fittings shall be lubricated and no delamination is allowed. Obvious bubbles, lines, cold spots, uneven color and other defects. For injection molded square and rectangular pipes, the wall thickness of the main body outside the socket joint shall not be less than the wall thickness of the pipe with the same specification and pressure grade: the uniform outer diameter of the pipe socket shall conform to the rules for the uniform outer diameter and deviation of the pipe in. The types and technical requirements of pipe fittings are economical. The sizes of each part of the pipe fittings are not listed. When required, product samples can be obtained from the ordering manufacturer. Adhesive socket pipe fittings. Elbows, tees, and fittings. The model drawing of the nominal outer diameter of the bonded socket elbow, tee and joint.
Liaoyang large-diameter square tube manufacturer directly supplies the manufacturer
The quality of seamless square tube is better and the price is more expensive. The welded square tube is welded by bending the plate. There is high temperature in the welding process, which will affect the metal structure, and its mechanical properties are not as stable as seamless steel tubes. Welded square tube is a hollow square section steel square tube, also known as hollow cold-formed steel. It is a square section steel with overall dimensions made of hot rolled or cold-rolled strip steel or coil steel by high-frequency welding after cold bending and forming. In addition to the thickening of the wall thickness, the size of the corner and the straightness of the edge of the seamless square tube have reached the extent that they exceed the resistance welded cold formed square tube. The size of the R corner is generally between 2 and 3 times of the wall thickness. It can also consume R corner square tubes of the size required by customers according to their needs. Seamless square tube is a kind of long steel with hollow section and no seams around. It is a square tube formed by extrusion of seamless tube through four sides of the mold. The square tube has a hollow section and is widely used as a pipeline to escort fluid. It is mainly used in liquid escort, hydraulic support, mechanical structure, medium and low pressure and high pressure boiler tubes, heat exchange tubes, gas, oil and other industries. It is more stable than welding and will not show cracks.
