Hebi ductile iron water pipe, ductile iron pipe water prices, Shunxiang ductile pipe provided by Shunxiang ductile pipe. Liaocheng Shunxiang Building Materials Co., Ltd. (www.lcsxjc.com) Shandong Liaocheng Premium Business League certification company, has Shunxiang other brands, has a good reputation, honesty, service-oriented "business alliance Service" icon on the page We will be happy to serve you! Building Materials Co., Ltd. mainly produces Liaocheng Shunxiang variety of milling of cast iron pipe, high quality ductile iron pipe, flexible cast iron pipe fittings, cast iron pit wells quality of our products. High temperature flexible pipe welding type expansion joints, because of heat conduction requires a certain time, so the points are at a different time to the highest temperature point. Welding process but, in general, is formed in a metallurgical weld process. Area near the weld metal has received the equivalent of a heat-treated ductile iron pipe water supply different specifications would have a corresponding change in the microstructure and properties. Welding, the weld crystallization starts from the bottom of the bottom wall toward the center of the pool to grow. When the cooling rate due to crystallization in each direction different ductile iron pipe water prices, thereby forming a columnar cast structure (ferrite and pearlite composed). Building Materials Co., Ltd. mainly produces Liaocheng Shunxiang variety of milling of cast iron pipes, ductile iron water pipe quality ductile iron water pipe manufacturers offer flexible cast iron pipe fittings, cast iron pit wells quality of our products. Due to the different circumstances of each point in the vicinity of the heat pipe flexible expansion joints weld heat-affected zone can be divided into the fusion zone and overheated zone, normalizing area and part of phase transition zones. Flexible expansion joints of pipe weld fusion zone and base metals is handover transition zone between the solidus and liquidus temperatures in this area, as part of the welding process, the temperature of the base material to melt, it is also known as semi-melted zone . At this point, to melt the metal solidified into cast structure for molten metal heating temperature is too high because of the formation of coarse-grained ductile overheating cast iron water pipe specifications, in the low-carbon steel double flanged Transmission Joint welding, pipe flexible expansion joints Although the welding area is small (0.1-1mm) but because of its strength and toughness are decreased, but here connector end faces change, can lead to stress concentration, so the fusion zone determines the properties of welded joints in a great extent.