News

  • Post time: 11-25-2020

    Hot dip galvanized pipe is molten matrix metai and the reaction of the iron al oy layer, so that the substrate and coating combination of both. Hot dip galvanized pipe Is first pickled, the steel surface in order to remove iron oxide, after pickling, by mixing the aqueous solution tank for cleani...Read more »

  • Post time: 11-24-2020

    Large diameter spiral pipe blasting, because the welds suffered the normal stress and the resultant stress is relatively small, blasting mouth generally not originated in the spiral weld its security than longitudinally welded pipes. But regardless of yield pressure is still bursting pressure are...Read more »

  • Post time: 11-23-2020

    LSAW steel pipe for gas pipeline Oil and Gas pipeline for national country projects in all of the world Our manufacturing of Double Submerged Arc Welded Pipe involves first forming steel plates into cylindrical shapes. Then the edges of the rolled plate are formed so that V-shaped grooves are for...Read more »

  • Post time: 11-19-2020

    1,In the condition of not effect the process of pipe welding, should be appropriate to increase the reserved length, epoxy powder end of polyethylene layer can be prevented because of steel pipe pile up for a long time, pipe metal corrosion caused by severe 3 PE anticorrosive become warped edge. ...Read more »

  • Post time: 11-18-2020

    From the conventional test and production practice can be sure that the temperature of liquid zinc galvanized seamless steel pipe to control the optimum temperature is in the range of 450 460′C. When the temperature is high, heat consumption will increase, shortening the life of steel zinc ...Read more »

  • Post time: 11-16-2020

    The difference between erw steel pipe and seamless steel pipe 1,diameter tolerance ERW pipe: The roll forming, reducing by 0.6% complete sizing, its process at room temperature is almost constant, and thus control the exact outer diameter, a small fluctuation range, help eliminate black buckle; ...Read more »

  • Post time: 11-12-2020

    Pipeline pickling methods can be divided into groove type pickling and circulating acid, the cycle can be divided into online circulation pickling and pickling line the outer loop. Trough pickling metfiod Is already installed pipe or tube removed, segmented on chemical pickling tank dipping, afte...Read more »

  • Post time: 11-09-2020

    China’s exports of stainless steel fell 6,000 mt or 2.13% month on month and decreased 21.8% year on year to 263,500 mt, showed Chma customs data compiled by SMM. China imported 177,100 mt of stainless steel last month, up 31.8% from August and up 74.4% from September 2019. China stainless ...Read more »

  • Post time: 11-05-2020

    ‘Twelfth Five-Year” Development Program “clearly put forward by 2015, the total length of oil and gas pipeline win be more than 150,000 km, which will grow 90% over 2010. Prospects institute of Information industry Research institute of welded steel pipe industry” Planning...Read more »

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