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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: 06/13/2014 13:40:57  Hits: 619
        “The length oil and gas pipeline increases from 40,000 km in 2000 to 100,000km.”The director of the Expert Consultation Committee of National Energy Commission said in recent days. The oil and gas pipeline has set up a new pattern stretching every place of China and connecting China to abroad....
  • Posted: 05/29/2014 16:29:23  Hits: 535
    In 2013, great changes have been taken place in macro economy both at home and abroad. Developed economies show apparent recovery this year, while developing countries grow slowly and even downward. But China's economy is in still steady growth and seeks improvement in stability.   Recent domestic steel pipe market...
  • Posted: 05/23/2014 14:26:43  Hits: 552
    The price of imported rebar declines in America this week. Earlier this week, price of Turkey resource rebar got kind of fall in American rebar market, but the price did not fall below $600/ton.   Some market participants said that future Turkish resources offer may fall further under the influence of declining scrap...
  • Posted: 04/29/2014 14:04:17  Hits: 788
    A consortium developing Kazakhstan's giant Kashagan oil field has concluded that pipelines carrying natural gas and oil from offshore wells for processing onshore will need to be replaced, the deputy head of the group said.   A final report on why Kashagan's gas pipeline began leaking late last year, only...
  • Posted: 04/23/2014 10:25:53  Hits: 566
    Over 430 people gathered at the APIA Brisbane Dinner, which was held on 20 February at the Hilton Brisbane. Attendees heard with interest from GasFields Commission Queensland Chairman John Cotter, who has travelled more than 20,000 km around regional Queensland liaising with rural landholders and communities about the...
  • Posted: 04/17/2014 01:43:19  Hits: 547
    For the eighth consecutive year, the Consortium for Energy Efficiency (CEE) today releases its Annual Industry Report, deepening the picture of US and Canadian energy efficiency and demand response investments. CEE is an award-winning consortium of efficiency program administrators from the United States and Canada. Members...