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News
Spiral steel pipe welding quality standard
Views: 203 Sep 14 , 2022
Spiral steel pipe is a spiral seam steel pipe made of strip steel coil as raw material, often warmly extruded, and welded by automatic double-wire double-sided submerged arc welding process. The spiral steel pipe feeds the strip into the welded pipe unit. After rolling by multiple rollers, the strip is gradually rolled up to form a...
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What happens to the hardness of seamless steel pipes after annea
Views: 258 Sep 09 , 2022
What happens to the hardness of seamless steel pipes after annealing? Increase or decrease?
Most of the seamless steel pipes are produced by cold-drawing and hot-rolling processes. Cold-drawn seamless steel pipes are mostly produced by the combined process of cold-drawing and cold-rolling. Cold-drawn steel pipes are more accurate in...
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Teach you how to distinguish seamless steel pipe models
Views: 236 Sep 07 , 2022
Seamless steel pipe is a steel pipe made of whole round steel pierced without welded seams on the surface, called seamless steel pipe. According to the production method, seamless steel pipe can be divided into hot-rolled seamless steel pipe, cold-rolled seamless steel pipe, cold-drawn seamless steel pipe, extruded seamless steel pipe,...
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Learn more about the classification and use of seamless steel pi
Views: 241 Sep 02 , 2022
The use and classification of seamless steel pipe Seamless steel pipe is a round, square, rectangular steel with a hollow section and no joints around it. Seamless steel pipes are made of steel ingots or solid tube blanks through perforation to make capillaries, which are then hot-rolled, cold-rolled or cold-drawn.
Uses: Seamless...
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What problems should be paid attention to when using seamless st
Views: 217 Sep 01 , 2022
The seamless steel pipe generally loses its bearing capacity at a temperature of 450~650 °C, and a very large deformation occurs, resulting in the bending of steel beams and steel columns. As a result, it cannot be used again due to excessive deformation. The fire resistance rating of the steel pipe is about 15 minutes.
The...
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Seamless steel pipe wall thickness detection method
Views: 192 Aug 30 , 2022
In the production process of seamless steel pipes, there is a certain range of wall thickness. We need to detect the wall thickness of seamless steel pipes. There are two methods for wall thickness detection, one is ultrasonic thickness measurement, the other is Laser thickness measurement.
Ultrasonic thickness measurement
The...
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Why should pipe ends be thickened during production of petroleum
Views: 225 Aug 23 , 2022
Petroleum steel pipe is a kind of long steel with hollow section and no joints around it, and petroleum cracking pipe is an economical section steel. Function: Widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, bicycle frames and steel scaffolding used in...
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Innovative manufacturing process of high-precision small-diamete
Views: 206 Aug 19 , 2022
High-precision small-diameter high-pressure boiler seamless steel tubes have been widely used in hydraulic systems and diesel fuel systems. At present, cold-rolled or cold-drawn capillaries are generally used to manufacture high-precision, small-diameter, high-pressure seamless steel pipes. Although they can meet the technical...
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Passivation process of galvanized checkered sheet
Views: 233 Aug 16 , 2022
Passivation is widely used as an effective protective measure for metals and metal coatings in less severe environments.
The passivation treatment of galvanized checkered plate is a kind of chemical conversion coating treatment. The actual passivation process depends on the electrochemical reaction process on the metal surface....
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The main performance and classification of seamless square tube
Views: 238 Aug 12 , 2022
Seamless square pipe is a square steel pipe with four corners. It is a square steel pipe formed by cold drawing and kneading of seamless steel pipe.
The main properties of square tubes include: plasticity, hardness and fatigue. Plasticity refers to the ability of a metal material to undergo plastic deformation (permanent deformation)...
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