I would like to ask some questions about knowledge related to oil pipelines
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1. What material is generally used for oil pipelines? 2. Do pipes larger than 50 belong to pressure pipes? 3. For oil pipelines, are there any recommended manufacturers of pipes and pipe fittings? Or can I just buy one randomly from the market? Thank you
1. Since crude oil contains sulfur, HIC carbon steel should be used. 2. The primary criterion for determining pressure pipelines is to check whether they are pipelines that are flammable, explosive, toxic, or harmful; thereafter, it is necessary to determine whether the pressure is greater than 50. Refer to the newly revised definition of pressure pipelines. 3. Refer to 1
The qualifications of pipe fitting manufacturers determine what types of pipes and fittings they can produce and which are available on the market. Suppliers are required to provide a quality inspection report issued by the original manufacturer, stamped with the manufacturer’s official seal; copies of such reports must also bear this seal to prevent unscrupulous suppliers from substituting inferior products for high-quality ones. Of course, if possible, spectral analysis or quick analysis using a handheld spectrometer can be employed.
For crude oil, refined oil, and other substances with moderate temperatures, 20# steel is generally sufficient; either GB8163 or GB9948 standards can be used. Whether a pipe qualifies as a pressure pipe is not determined solely by its diameter – currently, pipes with a diameter of DN50 or less are not considered pressure pipes. The pipes can be purchased directly from the market, while fittings need to be sourced from specialized manufacturers. If you need a pipe fitting manufacturer, I can provide one