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 tube diameter, wall thickness of the pipe 5 shows spiral welded pipe equipment unit, therefore, the inner diameter of the pipe is (108 * 5-5 = 98MM but not exactly equal to the difference minus twice the wall thickness of the pipe diameter, made 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 inside diameter of a pipe diameter specification name, design drawings so use the nominal diameter, the purpose in order 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 said spiral welded pipe mill If the outer diameter of said pipe specifications should also make table shows 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. Taiyuan, China Xin 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 华欣诚 for On the stainless steel flux-cored welding you points and Notes 1. The flat characteristic welding power supply, reverse polarity DC welding using CO2 welder can generally accurate frequency welded pipe welding equipment, but wire wheels Please slightly loosen the pressure. 2. Protection of gas is generally carbon dioxide gas pipe equipment manufacturing company, the gas flow rate to 20 ~ 25L / min more appropriate. 3. The distance between the nozzle and the workpiece to 5 ~ 25mm is appropriate. The spiral welded pipe stem elongation unit, general welding current is 250A below about 5mm, when more than about 20 ~ 25mm 250A is more appropriate. frequency welded pipe equipment prices, Huaxin Cheng electromechanical (certified), Malaysia pipe from Taiyuan Huaxin Cheng electromechanical equipment Equipment Limited. Taiyuan Huaxin Cheng Electrical Equipment Co., Ltd. (www.tyhxc.com) is Jinzhong, other leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer demand in Huaxin Cheng electromechanical leadership with the staff warmly welcome all inquiries negotiations to create a better future for electromechanical Huaxin Cheng.