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 spiral welded pipe for you to resolve common defects in how to detect when two spiral welded pipe equipment reserved resection margin is less, since the layout of reason test equipment, spiral pipe ends are not useful in the detection of head and sometimes, The tip is most capable of cracks or other disadvantages of the site. If the spiral welded pipe ends there a potential tendency to crack pipe equipment quotes, weld heat affected device when there are potentially able to expand the crack. Thus, it should be noted that post-test must be welded spiral welded area, to discover expanding spiral welded ends shortcomings. 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 is the tube diameter, wall thickness of the pipe 5 represents, therefore, the inner diameter of the steel pipe is (108 * 5-5 = 98MM but not exactly equal to the difference between the wall thickness of the pipe diameter minus twice, using zinc and zinc - aluminum alloy coating surface protection of steel products, steel production in developed countries have reached 30 to 40% of the country is currently only 10% can be said, is close to the nominal diameter of the inner diameter, but not equal to the inside diameter of a pipe diameter specifications name, design drawings so use nominal diameter pipe equipment manufacturers aim to according to the nominal diameter can be determined pipes, fittings, valves, flanges, gaskets and other structural dimensions and connection size, nominal diameter using symbols DN represents spiral welded pipe equipment, spiral If the outside diameter pipe unit, said the pipeline should also make specifications table, show the public some pipeline nominal diameter, wall thickness thermal expansion pipe is a hollow section, no seams around the long bar of steel in the design drawings. frequency welded pipe equipment, pipe equipment, Chongqing, Taiyuan Huaxin Cheng Hua Xincheng electromechanical provided by the Electrical and Mechanical Equipment Co., Taiyuan Huaxin Cheng Electrical Equipment Co., Ltd. (www.tyhxc.com) strong, credible, Shanxi Jinzhong Other industry has accumulated a large number of loyal customers. The company better work attitude and constantly improve the innovative ideas will lead Huaxin Cheng electromechanical and you hand in hand into the brilliant, for a better future!