Product Information
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Three connection methods of large-diameter spiral steel pipes
The most commonly used connection method for large-diameter spiral steel pipes is welding, but in some projects, threaded connections, flange connections, socket connections, groove connections, etc. are often used. Welding and flange connection: Welding and flange connection ...Read more -
What problems should be paid attention to when welding galvanized steel pipe
1. The premise must be polished: the galvanized layer at the weld must be polished off, otherwise, bubbles, trachoma, false welding, etc. will occur. It will also make the weld brittle and reduce the rigidity. 2. Welding characteristics of galvanized steel: Galvanized steel is...Read more -
What are the heat treatments of stainless steel welded pipe
During the production process of stainless steel welded pipe, intermediate heat treatment, and finished heat treatment can be carried out. Because a bright surface without oxidation can be obtained, the traditional pickling process is canceled. The use of this heat treatment p...Read more -
Surface defects of seamless steel pipes and their causes
The causes of surface defects of seamless steel pipes are intricate. There are hundreds of influencing factors listed, and sometimes there are dozens of factors for the same defect, and the occurrence of defects has a great relationship with the steel type. This is why the pro...Read more -
Application and material of stainless steel seamless steel pipe
Stainless steel seamless steel pipe details – stainless steel pipe material Material: 201(1Cr17Mn6Ni5N), 202(1Cr18Mn8Ni5N), 301(1Cr17Ni7), 302(1Cr18Ni), 304(0Cr18Ni9), SS304, TP304 304L(00Cr19Ni10), SS304L, TP304L 321(1Cr18Ni9Ti), SS3 21. TP321, 316 (0Cr17Ni12Mo2) , SS31...Read more -
Analysis of Process Elements Affecting High-Frequency Longitudinal Welded Pipe
The main process parameters of high-frequency straight seam welded pipe include welding heat input, welding pressure, welding speed, opening angle, position and size of the induction coil, position of impedance, etc. These parameters have a greater impact on improving the qual...Read more -
The installation process of stainless steel pipe
The installation method of stainless steel pipes is the same as that of ordinary carbon steel, and some processes have the following process requirements. 1. Stainless steel pipes should not be in direct contact with other metals for hoisting and should be padded with non-meta...Read more -
Eddy’s current non-destructive testing method for a weld seam of spiral steel pipe
Pipeline transportation, as an efficient means of special transportation, has played an increasingly important role in oil and gas transportation and other fields. At present, domestic large-diameter transportation pipelines are mainly constructed of spiral welded steel pipes....Read more -
Identification method of fake and shoddy thick-walled seamless steel pipe
1. Shoddy thick-walled seamless steel pipes are prone to folding. Folding is a variety of fold lines formed on the surface of thick-walled seamless steel pipes, and this defect often runs through the longitudinal direction of the entire product. The reason for the folding is t...Read more