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26.05.2025

Enhancing Surface Quality of HFW Pipes by Adjusting Extrusion Roller Parameters

Abstract This study analyzes the causes of surface defects in high-frequency welded pipe billets, specifically, linear indentations and molten metal pits caused by the upper extrusion rollers. To address...
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  • Posted: 11/24/2014 16:10:15  Hits: 539
    Alexander Novak, Russia's Energy Department minister, said that Russia is considering reducing oil production in order to push up oil prices. However, it has not yet made the decision.   Novak said, for Russia reducing oil production is difficult. Firstly, the government budget depends on crude oil exports (76.47,...
  • Posted: 10/24/2014 15:33:26  Hits: 590
    According to Cameroon Tribune reported in October 20, Energy Department minister of ten members from Economic and Monetary Community of Central Africa (CEMAC) and Economic Community of Central African Countries (CEEAC), attended a meeting held in Yaoundé, the capital of Cameroon on 18th of October. The meeting reviewed...
  • Posted: 10/07/2014 16:16:14  Hits: 605
    "The Second China Wenzhou Export Commodity (Mumbai) Exposition" hosted by the government of Wenzhou was organized in 28th of September. The expo held in Mumbai from November 20 to November 22 every year is a branch of India Industrial Organization Fair and India Production Household Fair. The Chinese organizer...
  • Posted: 09/23/2014 16:08:20  Hits: 512
    A report of China Oil Economy Technology Institute released on the 18th of September pointed out that as the oil sands, pre-salt oil and shale oil and gas resources have become the "new favorite" of energy, there has been a transfer trend of global energy landscape axis from the Middle East to the Western Hemisphere....
  • Posted: 09/16/2014 16:17:33  Hits: 515
    According to The Outline of Prospecting Breakthrough Strategic Action (2011-2020) approved by the State Council, Ministry of Land and Resources, National Development and Reform Commission (NDRC), Ministry of Science and Technology (MOST) and Ministry of Finance organize the implementation of the prospecting breakthrough...
  • Posted: 08/16/2014 14:29:26  Hits: 597
    For a long time, hot and cold water supply within architecture is adopted the traditional galvanized steel pipe. Traditional galvanized steel pipe has been adopted for hot and cold water supply within architecture for a long time.With the continuous development of economy, people's values and concept of life have taken...
  • Posted: 08/13/2014 14:48:48  Hits: 636
    Economic Commission of Europe and Asia website announced on May 17th that they would impose 19.15% anti-dumping duties on Chinese stainless steel pipe over five years since May 15, 2013. This decision added insult to injury for steel pipe enterprises having suffered from the internal and external pressure.  ...
  • Posted: 08/06/2014 15:39:04  Hits: 505
    API steel pipe belongs to the line pipe of American oil standard. API oil line pipe is to extract oil, steam, water on the ground and they are transported to oil and gas industry enterprises through the line pipe. Line pipe contains seamless pipe and welded steel pipe whose end includes flat end, threaded end and socket...
  • Posted: 08/01/2014 16:02:40  Hits: 586
    Welded steel pipe is made of steel belt or steel plate and bended into deformation shapes such as round, square and so on, whose surface is jointed. Since the 30s of last century, with the rapid development of high-quality strip steel rolling production and technology of welding and inspection, welding quality improves...
  • Posted: 07/17/2014 15:15:33  Hits: 477
    Since March 2014, prices of iron ore, coke and other raw materials decline more sharply than price of steel. Steel mills profit improved markedly. With the downstream steel consumption gradually go into the peak season, steel mills are increasing the amount of production. Since April, the amount of steel has got rapid...
  • Posted: 06/27/2014 10:30:42  Hits: 648
    Strong technical support will be provided for water environmental security in the Haihe River in the 13th Five-Year Plan.   The relevant person in charge of environmental protection department investigate and survey "Water Pollution Control and Governance" (hereinafter referred to as the "water"...
  • Posted: 06/17/2014 15:14:41  Hits: 601
    Working for new energy cooperation between China and Russia now, they will build oil industrial chain across the border. Russia will take northeast area of China for a preferred direction. The development and opening up policy in Heilongjiang province and Inner Mongolia in northeast border of China is treated as a national...