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What is the difference between 2205 duplex stainless steel pipe and 304 stainless steel pipe
1. Compared with 304 stainless steel pipe, the advantages of duplex stainless steel pipe are as follows: (1) The yield strength is more than double that of ordinary austenitic stainless steel, and it has sufficient plastic toughness required for forming. The wall thickness of ...Read more -
What is the difference between spiral steel pipe and steel coil pipe
Both spiral steel pipes and steel coiled pipes belong to welded steel pipes, and the production processes of the two are very different. Spiral steel pipe is a spiral seam steel pipe made of strip steel coil as raw material, often warmly extruded, and welded by the automatic d...Read more -
Repair requirements for the shortcomings of spiral steel pipe welds
1. The minimum length of the repair weld is 50mm. If the defect direction on the base metal of the spiral steel pipe is allowed, the repair welding seam should be along the circumferential direction. 2. The repair welding seam should be ground to make the transition to the ori...Read more -
The reasons for the leakage of hot-dip galvanizing of seamless steel pipes
The reasons for the leakage of hot-dip galvanizing of seamless steel pipes causes and solutions: 1. The surface of the plated parts is not clean (1) The surface of the plated parts contains paint, grease, and soldering iron; it can be polished or scrubbed with relevant solvent...Read more -
Surface treatment method of anti-corrosion spiral steel pipe
1. The surface of the anti-corrosion spiral steel pipe is cleaned with solvent and emulsion, which can remove the organic matter on the surface of the spiral steel pipe, but it cannot remove the surface rust, oxide scale, welding flux, etc., so cleaning can only be used as an ...Read more -
The reason for the wrong side of the spiral steel pipe
In production practice, the steel pipe is often degraded by the wrong side and out of tolerance. Therefore, it is necessary to analyze the reasons for the misalignment of the spiral steel pipe and its preventive measures. The camber bend of the steel strip is the most importan...Read more -
Welding treatment of thick-walled spiral steel pipe
Thick-walled spiral steel pipe is a method of arc welding under the flux layer, which is formed by using the heat generated by the arc burning between the flux and the welding wire under the flux layer, the base metal, and the melting wire flux. In the process of use, the prin...Read more -
Quenching technology of straight seam welded steel pipe
The surface quenching and tempering heat treatment of straight seam welded steel pipe is usually carried out by induction heating or flame heating. The main technical parameters are surface hardness, local hardness, and effective hardened layer depth. Vickers hardness tester c...Read more -
Hardness index of anti-corrosion spiral steel pipe
The ability of metal materials to resist the indentation of the surface of hard objects is called hardness according to different test methods and application ranges. The hardness can be divided into Vickers hardness, Shore hardness, Brinell hardness, Rockwell hardness, microh...Read more