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Characteristics of seamless steel pipes for different purposes
Seamless steel pipes are used in various industries, and their characteristics vary based on their intended applications. Here are the key characteristics of seamless steel pipes for different purposes.
2024-09-20
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Thick-walled spiral welded pipe cutting method
A spiral steel pipe (SSAW steel pipe) is a welded pipe produced by rolling a strip of low-carbon structural steel or low-alloy structural steel into a tubular shape at a specific helical angle (referred to as the forming angle), and then welding the seams. Different types of spiral welded pipes require different cutting methods, and the cutting methods for thick-walled spiral welded pipes are as follows.
2024-09-20
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Repair of S355 LSAW steel pipe transverse crack
In recent years, with the growth of the national economy, thick-walled LSAW steel pipes have found widespread use in offshore platforms, high-temperature and high-pressure vessels, and wind power pipe piles. These steel pipes are typically made from materials such as D36 steel, S355 steel, and structural steel plates with Z-direction properties. Due to the large thickness, high carbon content, and high carbon equivalent of these plates, their weldability is poor, and they exhibit a tendency for high hardenability. This compromises the joint welding performance and makes cold cracks, particularly transverse cracks, more likely to form. When welding cracks do occur, along with the necessary control measures, it is crucial to repair the affected areas promptly. Below is an example of repair steps for transverse cracks in S355 steel welding.
2024-09-19
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ASTM A333 low temperature seamless steel pipe
ASTM A333 specifies seamless and welded carbon and alloy steel pipes designed for low-temperature applications. These pipes are manufactured using either the seamless or welding process, with no filler metal added during welding. To ensure the desired microstructure, all pipes undergo a specific treatment process.
2024-09-19
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Technological development process of ERW steel pipe
High-frequency electric resistance welded (ERW) steel pipes are produced by utilizing the skin effect and proximity effect of high-frequency currents. After a hot-rolled coil is shaped by a forming machine, the edges of the tube blank are heated and melted. Pressure welding is then performed under the action of extrusion rollers to complete the production process.
2024-09-19
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Application treatment method of seamless carbon steel pipe
To ensure seamless carbon steel pipes meet performance and durability requirements, various treatment methods must be applied throughout their preparation and installation. Here are some of the key application treatment methods for seamless steel pipes.
2024-09-19
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How to ensure the welding quality of GB5310 high pressure boiler pipe?
GB5310 high-pressure boiler pipes are frequently utilized in applications such as superheated steam lines, heat exchangers, and piping for high-pressure or ultra-high-pressure boiler equipment. These pipes demand stringent welding standards due to their critical role in safety and performance. Poor welding can compromise the effectiveness and longevity of the piping system. To ensure the integrity of GB5310 high-pressure boiler seamless steel pipes, which are known for their stable performance, meticulous pre-weld inspection and the selection of appropriate welding materials are essential.
2024-09-18
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Key points of nitriding treatment of seamless steel pipes
Based on the fundamental principles and process characteristics of nitriding treatment for seamless steel pipes, the key process parameters include nitriding temperature, nitriding time, and the ammonia decomposition rate. In this blog, we'll explore some critical aspects of the nitriding treatment process for seamless steel pipes.
2024-09-18
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Differences between ASTM A53 grade B and ASTM A106 grade B steel pipe
ASTM A53 and ASTM A106 are two widely used specifications for steel pipes, but they have distinct characteristics in terms of material type, manufacturing processes, and applications. This article will briefly introduce differences between ASTM A53 grade B and ASTM A106 grade B steel pipe.
2024-09-18
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Seamless steel pipe marking guidelines
Regulations provide comprehensive guidelines for marking seamless steel pipes to ensure traceability, quality assurance, and ease of identification. The key requirements are outlined as follows.
2024-09-18
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Welding and forming methods of large diameter seamless pipes
Large-diameter seamless pipes are essential in industries that demand high strength, reliability, and performance under pressure. They are often favored over welded pipes for applications involving high-pressure fluids or gases due to the absence of seams, which reduces the risk of failure. Given their widespread use in construction and infrastructure projects, the welding and forming processes for large-diameter seamless pipes are crucial. Below are key considerations and methods for both welding and forming.
2024-09-14
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Causes and control measures of seamless boiler tube leakage
Seamless boiler tubes are hollow steel components with open ends, critical for power plants, particularly in the main pressure-bearing parts of boilers, including economizer tubes, water wall tubes, superheater tubes, and reheater tubes (collectively known as "the four tubes"). These tubes perform key functions such as heating feedwater and steam, and their failure can lead to costly shutdowns and severe damage.
2024-09-14