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130 years ago, the emergence of pipeline transportation had a profound impact on the development of the world economy. In the history of world pipeline construction, China’s long-distance pipeline construction has experienced a long process of development. In 1958, the construction of the first long-distance pipeline Kedu Line entered a new development period. Up to now, China has built 395 long oil and gas pipelines, with a total length of 17000 kilometers. Pipeline transportation has played an important role in promoting the development of the national economy. In the 1990s, new breakthroughs were made in the construction of long-distance…

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With the development and progress of society, large-diameter straight seam steel pipe is widely used in many fields, such as oil and gas transportation. The end of large diameter straight seam steel pipe should be standard circular, but its shape will be affected by some factors, resulting in deformation. The deformed large-diameter straight seam steel pipe can not be used and installed normally, so how to avoid this situation? Next, manufacturers of large-diameter straight seam steel pipes will talk about: 1：First of all, it is necessary for manufacturers of large-diameter straight seam steel pipes to pay attention. When producing…

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According to the quality and performance of steel pipes, we have summarized the properties of different metal elements contained. Carbon: The higher the carbon content, the higher the hardness of the steel pipe, but the worse the plasticity and toughness. Sulfur: It is a harmful impurity in steel pipes. If the steel contains high sulfur content, it is easy to become brittle at high temperatures, which is usually called hot brittleness. Phosphorus: it can significantly reduce the plasticity and toughness of steel, especially at low temperatures. This phenomenon is called cold brittleness. In high-quality steel, sulfur and phosphorus should…

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Today, I want to discuss the technical terms of steel pipes with you. After reading this article, I believe that those who need steel pipes should know how to purchase them. The first is the steel pipe specification, which is the outer diameter multiplied by the wall thickness. For example, 325 times 10 represents that the outer diameter of the steel pipe is 325 mm and the wall thickness is 10 mm. Calculation formula of theoretical weight per meter: (outer diameter wall thickness) x wall thickness x 0.02466. The second is the wall thickness tolerance. In the production process,…

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