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  • Anti-corrosion treatment of ductile iron pipe

    Anti-corrosion treatment of ductile iron pipe

    1. Asphalt paint coating The asphalt paint coating is used to transport gas pipelines. Preheating the pipe before painting can improve the adhesion of the asphalt paint and accelerate the drying.   2. Cement mortar lining + special coating This kind of internal anti-corrosion measure is suitable ...
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  • SSAW Steel Pipe Price June 9th 2021

    SSAW Steel Pipe Price June 9th 2021

    API 5L/ASTM A53 GR.B, CARBON STEEL, SSAW STEEL PIPE FOB TIANJIN USD/TON Outside Diameter 外径 (mm) 219 273 324 356 406 457 508 610 711 762 813 914 Wall Thickness 6 868  868  868  868  868  868  868  868  868  868  868  868  壁厚 (mm) 7 868  868  868  868  868  868  868  868  868 ...
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  • Seamless Steel Pipe Price June 9th 2021

    Seamless Steel Pipe Price June 9th 2021

    API 5L/ASTM A106 GR.B, Seamless Carbon Steel Pipe 公称通径 DN 外径OD(mm) SCH40(6m/5.8m) SCH80(6m/5.8m) SCH160(6m/5.8m) 壁厚WT FOB 壁厚WT FOB 壁厚WT FOB (mm) USD/TON (mm) USD/TON (mm) USD/TON 1/4” 13.7 2.24 1,475.71  3.02 1,453.16  / / 3/8” 17.1 2.31 1,337.43  3.2 1,31...
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  • LSAW Steel Pipe Price June 9th 2021

    LSAW Steel Pipe Price June 9th 2021

    API 5L/ASTM A53 GR.B, CARBON STEEL, LSAW STEEL PIPE FOB TIANJIN Outside Diameter 外径 (mm) USD/TON 406 457 508 609.6 711.1 762 812 863.6 Wall  8 951  944  951  937  937  937  937  937  Thickness  9.53 944  930  937  917  917  917  917  917  壁厚 (mm) 10 910  896  903  917  91...
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  • Small Diameter ERW Steel Pipe Price June 9th 2021

    Small Diameter ERW Steel Pipe Price June 9th 2021

    API 5L/ASTM A53 GR.B (Small Diameter ERW Steel Pipe) Outside Diameter  Wall Thickness  FOB TIANJIN Outside Diameter  Wall Thickness  FOB TIANJIN 外径 (mm) 壁厚 (mm) 离港价 USD/TON 外径 (mm) 壁厚 (mm) 离港价 USD/TON 33.4 (1″) 2.1-2.4 866.36  Φ133        3.0-5.75 843.22  2.5-...
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  • Hot Rolled ERW Steel Pipe Price June 9th 2021

    Hot Rolled ERW Steel Pipe Price June 9th 2021

    API 5L/ASTM A53 GR.B (Hot Rolled ERW Steel Pipe) Outside Diameter  Wall Thickness  FOB TIANJIN Outside Diameter  Wall Thickness  FOB TIANJIN 外径 (mm) 壁厚 (mm) 离港价 USD/TON 外径 (mm) 壁厚 (mm) 离港价 USD/TON 219、245 5.0-11.75 833.69  426 5.75-11.75 854.11  273 5.0-11.75 833.69 ...
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  • Hot Expanded ERW Steel Pipe Price June 9th 2021

    Hot Expanded ERW Steel Pipe Price June 9th 2021

    API 5L/ASTM A53 GR.B (HOT EXPANDED ERW STEEL PIPE) Outside Diameter  Wall Thickness  FOB TIANJIN Outside Diameter  Wall Thickness  FOB TIANJIN 外径 (mm) 壁厚 (mm) 离港价 USD/TON 外径 (mm) 壁厚 (mm) 离港价 USD/TON 245, 273 5.0-9.28 862.55  450, 457, 508, 530 6.5-11.98 900.67  ...
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  • Four methods of measuring the length of spiral steel pipe

    Four methods of measuring the length of spiral steel pipe

    1. Improved encoder length measurement This method is an indirect measurement method. The length of the steel pipe is measured indirectly by measuring the distance between the two end faces of the steel pipe and their respective reference points. Set a length measuring trolley at each end of the ...
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  • Technical characteristics of double-sided submerged arc welding spiral steel pipe

    Technical characteristics of double-sided submerged arc welding spiral steel pipe

    1. During the forming process of the steel pipe, the steel plate deforms evenly, the residual stress is small, and the surface does not produce scratches. The processed steel pipe has greater flexibility in the size range of steel pipes with the diameter and wall thickness, especially in the prod...
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  • Petroleum casing threaded connection type insulation joint installation requirements

    Petroleum casing threaded connection type insulation joint installation requirements

    1. Within 50 meters of the installation location of the insulation joint, avoid dead holes to be welded.   2. After the insulated joint is connected to the pipeline, it is not allowed to lift the pipeline within 5 meters of the joint. The pressure must be tested together with the pipeline.   3. A...
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  • Heat treatment technology of oil casing

    Heat treatment technology of oil casing

    After the oil casing adopts this heat treatment method, it can effectively improve the impact toughness, tensile strength, and anti-destructive performance of the oil casing, ensuring good value in use. Petroleum casing is a necessary pipe material for drilling oil and natural gas, and it needs t...
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  • Horizontal fixed welding method of stainless steel pipe

    Horizontal fixed welding method of stainless steel pipe

    1. Welding analysis: 1. Cr18Ni9Ti stainless steel Ф159mm×12mm large pipe horizontal fixed butt joints are mainly used in nuclear power equipment and certain chemical equipment that require heat and acid resistance. The welding is difficult and requires high welding joints. The surface is required...
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