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What are the factors that cause horizontal stripes in spiral seam submerged arc welded steel pipes

What are the factors that cause horizontal stripes in spiral seam submerged arc welded steel pipes

Keywords :What are the factors that cause horizontal stripes in spiral seam submerged arc welded steel pipes        Update : 2023-09-11        View(s) : 1

First of all, it may be due to the stress of spiral submerged arc welded steel pipes . That is, the residual stress and welding stress after the steel pipe is formed. Secondly due to the presence of hydrogen. For example, the flux is not dried enough, the preheating temperature is insufficie...

Quality control of large diameter spiral steel pipe

Quality control of large diameter spiral steel pipe

Keywords :Quality control of large diameter spiral steel pipe        Update : 2023-09-08        View(s) : 531

Nowadays, energy saving has become the development theme of all countries in the world, so more environmentally friendly prefabricated direct-buried thermal insulation pipes are widely sought after by everyone, especially since the 1970s and 1980s, to save energy, reduce emissions, and reduce energy...

Large diameter thick wall seamless steel pipe details

Large diameter thick wall seamless steel pipe details

Keywords :Large diameter thick wall seamless steel pipe details        Update : 2023-09-07        View(s) : 733

Large-diameter thick-walled seamless steel pipes are made from steel ingots or solid tube blanks that are perforated into capillary tubes, and then hot-rolled, cold-rolled, or cold-drawn. Large-diameter thick-walled seamless steel pipes play an important role in my country's steel pipe industry....

Introduction to common methods of steel pipe welding

Introduction to common methods of steel pipe welding

Keywords :Introduction to common methods of steel pipe welding        Update : 2023-09-06        View(s) : 1

At present, the commonly used methods for welding steel pipes are electrode arc welding (SMAW), submerged arc welding (SAW), gas tungsten arc welding (GTAW), gas melting arc welding (GMAW), flux cored arc welding (FCAW) and the following Several types such as directional welding. (1) The ad...

Physical and chemical properties and appearance testing of high-frequency welded pipes

Physical and chemical properties and appearance testing of high-frequency welded pipes

Keywords :Physical and chemical properties and appearance testing of high-frequency welded pipes        Update : 2023-09-05        View(s) : 561

High-frequency welding management properties: normal temperature mechanical properties, high-temperature mechanical properties, low-temperature properties, and corrosion resistance. The physical and chemical properties of high-frequency welded pipe mainly depend on the chemical composition of st...

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