Mainly list the high frequency straight seam resistance welding steel pipe units and introduce the HFW steel pipe manufacturers in China.
High frequency straight seam resistance welding steel pipe can be divided into five groups according to the diameter, Φ600mm-Φ500mm unit, Φ400mm-Φ300mm unit, Φ200mm-Φ168mm unit, Φ114mm-Φ89mm units and Φ89mm below unit. X65 steel grade below, frequency straight seam resistance welding pipes are used in the oil and gas pipelines, more with specifications ≤Φ400mm, less use Φ600mm-Φ500mm specifications. Oil casing pipes are more with specifications of Φ508mm-Φ76mm, steel grade of H40, J55, N80, etc., typical manufacturers are Baoji Steel Pipe, Bohai Petroleum Equipment Dagang new century pipe, Hunan great steel pipe, CNOOC Jinzhou pipelines.
There are also other products like round, square and rectangular pipe of small and medium-size high-frequency straight seam resistance welding pipes. Round steel pipe is more used as galvanized steel pipe, typical manufacturers: Tianjin Youfa steel pipe, Zhejiang Jinzhou pipelines. Small square and rectangular pipe are more used for building structures, containers and embroidery machine industry, the typical factory: Jiangsu Yulong Steel Pipe, Jiangsu six dragons steel pipe, Wuhan Jiangbei Steel pipe, Baoshan Iron and Steel Institute, the like. These welded pipe has a large demand market and considerable profits, but the technical content is not high. Therefore, high-frequency straight seam resistance welding pipes to develop in the direction of precision tubes, creating an upgraded version of HFW steel pipe is the first thing to do.
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Steel pipes are essential components in various industries, from construction and infrastructure to oil and gas. Ensuring their quality, safety, and efficiency is paramount, which is where the International Organization for Standardization (ISO) comes into play. ISO sets globally recognized standards that specify the properties and testing methods for steel pipes, providing a common language for manufacturers, suppliers, and customers. This article delves into the ISO standards for steel pipes, offering a detailed overview of their specifications and applications.The start of national carbon emissions trading market
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