Taiyuan Huaxin Cheng Electrical Equipment Co., Ltd. is a high-tech enterprise specialized in the design, development and manufacture of welded pipe equipment, spiral welded pipe equipment, cold-formed steel equipment, sheet and pipe finishing equipment and high-precision slitting line equipment. Taiyuan Huaxin Cheng electromechanical equipment to introduce you to spiral welded pipe mill diameter spiral welded pipe mill knowledge nominal diameter galvanized steel post 100MM 102 * 5108 * 5 and other several, thermal expansion pipe nominal diameter and its inner diameter, outer diameter are are not equal. 108 for the outer diameter of the tube precision welded equipment prices, 5 indicates the wall thickness of the pipe, and therefore, the inner diameter of the steel pipe is (108 * 5-5 = 98MM but not exactly equal to the difference in pipe diameter minus twice the wall thickness precision high frequency pipe equipment, the use of zinc and zinc - aluminum alloy coated steel products for surface protection, developed countries have reached 30 to 40% of the country's steel production is currently only 10% can be said, is close to the nominal diameter of the inner diameter, but not equal to the inner diameter of a pipe diameter specification name, design drawings so use nominal diameter, the purpose to be determined according to the nominal diameter of the pipe, fittings, valves, flanges, gaskets and other structural dimensions and connection size, nominal diameter DN using symbols said outer diameter spiral welded pipe mill in the design drawings if said, it should also make the pipe specifications table, show the public some pipeline nominal diameter, wall thickness thermal expansion pipe is a hollow section, no seams around the long strip steel. Taiyuan Huaxin Cheng Electrical Equipment Co., Ltd. is a professional high-tech enterprise engaged in the design, development and manufacture of welded pipe equipment, spiral welded pipe equipment, cold-formed steel equipment, sheet and pipe finishing equipment and high-precision slitting line equipment. Taiyuan 华欣诚 you elaborate spiral welded pipe mill for how to increase performance and stability of spiral welded pipe? a, spiral welded pipe mill small and medium steel, wire rod, rebar, the diameter steel pipe, spiral welded steel wire and wire rope and other equipment unit, in a well-ventilated material shed storage, but the thatch must underlay. Second, some small steel, sheet steel, steel, silicon steel, *** or thin-walled steel pipes, all kinds of cold-rolled, cold-drawn steel and high prices, corrosive metal products, can be stored for storage. Third, keep spiral steel pipe products, sites or warehouse equipment, should be selected in the clean, smooth drainage area, away from harmful gases or dust in factories and mines. presence on the ground to clear the weeds and all miscellaneous material, keeping clean steel. four large steel, rail, steel disgrace, large diameter steel pipe, forgings, etc., may open dumps. five, spiral welded pipe mill in a warehouse not with acid, alkali, salt, cement, steel and other aggressive nature material stacked together different varieties of steel should be stacked separately, to prevent confusion and prevent contact corrosion. Spiral welded pipe equipment unit _ Egypt _ Huaxin Cheng electromechanical equipment provided Taiyuan Huaxin Cheng from Taiyuan Huaxin Cheng Electrical Equipment Electrical Equipment Co. Ltd. (www.tyhxc.com) strong, credible, and other industries in other Jinzhong accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Huaxin Cheng electromechanical and you work into the brilliant, for a better future!