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News
Introduction of anti-corrosion processing of national standard s
Views: 113 Aug 02 , 2022
Details of anti-corrosion processing of national standard spiral steel pipes: In the three electrochemical corrosion processes for buried pipelines, the anti-corrosion method of national standard spiral steel pipes is to suppress one of the processes first. For example, adding anti-corrosion coating to the outer wall of the steel pipe can...
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Causes of Welding Cracks in Electric Welding of Q345D Seamless S
Views: 109 Jul 29 , 2022
The electric welding crack of Q345D seamless steel pipe is a serious production and processing defect, which will reduce the total area of the welding cross-section and cause the bearing stress. Welding cracks are generally divided into vertical and horizontal. Vertical cracks are the most common in the notch of the molten pool....
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Q345D seamless steel pipe penetration detection method
Views: 106 Jul 27 , 2022
Q345D seamless steel pipe cannot use magnetic particle inspection for non-magnetic raw materials such as martensitic stainless steel angle steel, copper and aluminum, but can be inspected by infiltration inspection method. The key of Q345D seamless steel pipe penetration detection method is color detection and fluorescence...
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Why do ordinary seamless steel pipes need to be pickled?
Views: 102 Jul 25 , 2022
The iron oxide scale on the inner and outer surfaces of the hot-rolled tube stock or the in-process tube after the intermediate heat treatment should be removed before the cold working of the ordinary seamless tube. The existence of iron oxide scale, on the one hand, affects the quality of subsequent lubrication; on the other hand,...
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High pressure steel pipe installation process
Views: 110 Jul 22 , 2022
The installation method of high-pressure steel pipes is similar to that of medium and low-pressure pipes, but the installation requirements of high-pressure steel pipes are higher and the regulations are stricter.
The high-pressure pipe sections, pipe fittings, fasteners, and valves used for installation must be...
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What are the requirements for the cooling system of seamless ste
Views: 103 Jul 21 , 2022
The cooling method of seamless steel pipe varies with its material. For most steel grades, natural cooling can meet the requirements. For some special-purpose seamless steel pipes, in order to ensure the required organizational state and physical and mechanical properties, there must be a certain cooling method and cooling system. For...
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About the performance of seamless steel pipe
Views: 123 Jul 19 , 2022
Hot-rolled seamless steel pipes are generally produced under automatic rolling mills. After inspection and removal of surface defects, the solid core finishing pipe is cut into lengths, and the surface layer of the broken hole end of the finishing pipe is relieved, and then sent to the heat treatment equipment to heat up, and the holes...
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Welded pipe classification knowledge by use
Views: 111 Jul 14 , 2022
Welded pipes are further divided into general welded pipes, galvanized welded pipes, oxygen-blown welded pipes, wire casings, metric welded pipes, idler pipes, deep well pump pipes, pipes for cars, transformer pipes, electric welded thin-walled pipes, electric welded special-shaped pipes and spiral welded pipes.
General welded pipe:...
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Stainless steel rod classification
Views: 103 Jul 12 , 2022
According to the processing method, stainless steel is divided into: pressure working steel and cutting steel; according to the structure characteristics, it is divided into five types: austenite type, austenite-ferrite type, ferrite type, martensitic type and precipitation hardening type. .
Stainless steel rods have broad...
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Process flow of steel pipe processing
Views: 104 Jul 07 , 2022
The seamless steel pipe is made of perforated whole round steel, and the steel pipe without weld seam on the surface is called seamless steel pipe. According to the production method, seamless steel pipes can be divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, extruded...
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