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30.07.2018

The Shanghai Glass-lined Equipment Exhibition 2018

Exhibition Name: The Shanghai Glass-lined Equipment Exhibition 2018 Exhibition Date: from 19th to 21st November, 2018 Exhibition venue: Shanghai Address: Shanghai New International Expo Center Contra...
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Technical Articles
  • Posted: 06/21/2016 11:25:55  Hits: 37
    The OCTG pipe refers to the seamless tube used in oil wells. Its manufacturing methods are the same as seamless tube, domestic industries use steel to produce, such as DZ (geology) 35 ~ DZ55, etc. There is a thread on both ends of the steel tube, for combining with joint. In order to ensure the joint sealing, this kind...
  • Posted: 06/14/2016 17:08:34  Hits: 24
    Welded steel pipe, also known as welded pipe, is a steel pipe which welded by steel plate or strip after the coil shaping. Welding steel pipe is simple in production process, high in production efficiency, various in specifications, and the equipment capital is not much. Generally, the strength of welded steel pipe is ...
  • Posted: 06/01/2016 17:46:24  Hits: 72
    According to the materials, cast iron pipe can be divided into: gray cast iron pipe, Ductile Cast Iron Pipe and high silicon iron pipe. Cast iron pipe is used for water supply, drainage and gas pipeline projects. In the middle and low pressure pipe network, cast iron pipe with safe and reliable operation, low damage ...
  • Posted: 05/06/2016 08:38:40  Hits: 88
    1. Argon Arc Welding Stainless steel pipes need penetrated welding without oxide impurities, having small heat-affected as possible. Argon arc welding has tungsten inert gas shield and has stable adaptability, superior welding quality, excellent penetration property, therefore the production has been widely applied...
  • Posted: 03/28/2016 17:23:07  Hits: 160
    Seamless steel pipes are widely used in various fields, but how to distinguish their quality? Here are suggestions offered by Landee Pipe Company. 1. Fake seamless steel pipes are easily to have puckers. Puckers referring to all folding lines on the surface of pipes, and the defects are usually longitudinally througho...
  • Posted: 03/22/2016 16:37:20  Hits: 269
    Generally, the hardness of seamless steel pipes has three standards: Brinell Hardness, Rockwell Hardness and Vickers Hardness.   1. Brinell Hardness Brinell Hardness is the most common standard for seamless steel pipes, generally use diameter of indentation to represent the hardness of material, which is i...
  • Posted: 03/17/2016 14:07:30  Hits: 157
    No matter how sophisticated the welding technique is, there still have some common defects on the welding parts of steel pipes. 1. Bubbles. Bubbles mainly occur in the center of the welding parts; the major reason is that the hydrogen is still existing in the metal weld seams in the form of bubbles. There are seve...
  • Posted: 03/17/2016 14:01:37  Hits: 124
    There are some detailed matters need attention when welding stainless steel pipes. 1. Applied the vertical generator characteristic power, when using the direct current, apply the positive polarity (welding wire connect to negative polarity). Generally is suitable for welding thin plate about 6mm. When using this ...
  • Posted: 03/03/2016 08:45:00  Hits: 228
    The uneven wall thickness of steel pipes is mainly represented as uneven spirally wall thickness, uneven straight wall thickness and the ends are too thick or too thin, even the grinding technique is one of the important factors. The following are the reasons to cause the uneven wall thickness and corresponding measu...
  • Posted: 02/24/2016 16:41:47  Hits: 5772
    Seamless steel pipes are mainly used in oil pipeline and gas pipeline, but seldom used in oil pipelines with long-distance. Most long distance pipeline applied ERW pipes, SSAW pipes and LSAW pipes. Here are comparisons of technological features and performance of these pipes.    1. Electric Resistance W...