Mainly introduce the advantages of HFW steel pipe and the development direction of HFW unit.
High frequency straight seam welded steel pipe (HFW)
The advantage of HFW steel pipe lies in the after-weld heat treatment step to eliminate the residual stress of the weld and heat affected zone, grain refinement and strengthen the mechanical properties. Fully utilizing and extending this advantage can improve product quality and develop new products. Baosteel HFW610 unit, CNOOC Zhejiang Jinzhou Petroleum Steel Pipe HFW630 unit, Wuhan Iron and Steel Wuhan Jiangbei HFW660 unit, Dagang Oilfield in Bohai New Century HFW245 equipment unit and PetroChina Baoji Petroleum Steel Pipe SEW unit to develop high-quality OCTG, marine pipelines, oil casing and pulp pipeline all illustrate this trend.
For HFW unit, the larger the diameter, the more restricted by the weight and thickness of strip material, material storage facilities is restricted by the spiral looper, so foreign mainly uses the 600 series unit to produce with "roll to roll" mode, such as Japan. In addition, HFW unit is with higher line speed (16m / min), while submerged arc welded steel pipe speed is generally 3m / min, which does not match. HFW to SAW (submerged arc welded) envisaged extending is relatively difficult.
Technological innovation of HFW unit is currently mainly limited to the areas of OCTG, cold-formed steel products; Furthermore, it should develop towards the precise direction of the automobile, home appliances, chemicals, boilers, machinery and other industries, as well as in the construction, textile, agriculture and other general use series.
Comprehensive Guide to ISO Steel Pipe Standards
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.
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