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API 5L welded steel pipe
The American Petroleum Institute (API) released the API 5L standard in early 1926, initially covering three steel grades: A25, A, and B. Over time, additional grades were introduced. By the year 2000, the global use of steel grades for pipelines was distributed as follows: X70 accounted for approximately 40%, X65 and X60 for about 30% each, and a significant number of small-diameter product pipelines used X52 steel grade, primarily for resistance-welded straight pipes (ERW steel pipes).
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4 welded steel tube connection methods
Welded steel pipes are fabricated by rolling steel plates and welding them along a mold of a specified diameter. These pipes are widely utilized in industries such as construction, machinery manufacturing, and bridge engineering due to their high production efficiency, rigidity, and pressure resistance, especially in larger sizes. Welded pipes are generally categorized into carbon steel pipes and stainless steel pipes.
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Application scope of low carbon steel pipe
Low carbon steel pipe, also known as mild steel pipe, is a crucial industrial material with a wide range of applications across many fields. From construction to machinery, and from energy to the chemical industry, low carbon steel pipes play an indispensable role. Below, we detail the application range and significant roles of low carbon steel pipes in various fields.
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Processing technology of structural carbon steel seamless pipes
With the continuous development of industry, carbon steel seamless pipes (CS SMLS Pipe) are increasingly utilized in various fields, attracting significant attention to their processing technology. These pipes offer advantages such as a hollow cross-section, uniform wall thickness, smooth internal and external surfaces, and stable quality. They are widely used for transporting oil, natural gas, water, and other fluids, as well as in structural and mechanical applications. This article introduces the six major processing technologies for carbon steel seamless pipes used in structural applications.
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Introduction to carbon steel welded pipe hardness
Carbon steel welded pipes are widely used in various industries due to their strength, durability, and versatility. A key property that determines the suitability of these pipes for different applications is their hardness. Hardness in carbon steel welded pipes is commonly measured using three standard methods: Brinell, Rockwell, and Vickers hardness tests. Each of these methods provides a different approach to assessing the material's resistance to deformation and wear.
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Usage and standard of carbon seamless steel pipe
This article will briefly introduce usage and standard of carbon seamless steel pipe.
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Quality requirements for carbon steel pipes
Here's an overview of the quality requirements for carbon steel pipes.
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Cooling ways of carbon steel pipe
To ensure the required microstructure and physical-mechanical properties for certain special-purpose steel pipes, specific cooling methods and systems are necessary. This article will briefly introduce cooling ways of carbon steel pipe.
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Production notes of SSAW steel pipe
During the production of SSAW steel pipes, attention must be paid to several critical factors. In addition to standard tests as specified by the API and other relevant standards, as well as specific user requirements, there are also destructive tests required for steel and steel pipes. These tests include evaluating the physical and chemical properties of raw materials, sampling, and conducting a 100% visual inspection of the steel.
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Wall thickness controlling of carbon steel seamless pipes
Carbon steel seamless pipes (CS seamless pipes) are widely used as structural materials in construction, manufacturing, and various other industries. Wall thickness control is a crucial aspect of their production, directly affecting the quality and performance of the steel pipes. This article introduces and analyzes the methods for controlling the wall thickness of carbon steel seamless pipes.
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