Thermal expansion pipe as a processing method is the small diameter pipe diameter steel processing with hot-rolled steel mechanical properties than the somewhat less certain. Limited to steel pipe specifications is limited, according to the needs of the end consumer so hot expansion pipe born friends, thermal expansion pipe specifications randomness is relatively large, the density is relatively low, but a strong contraction pipe. drawing with cross rolling method or a method to expand the diameter of the pipe.
Thermal expansion pipe, using a two-step push expansion unit expansion cone dead technology, digital intermediate frequency induction heating technology, hydraulic technology in one machine, anti-corrosion steel its reasonable process, reduce energy consumption, lower capital investment, product quality, a wide range of raw materials and product specifications applicability, flexibility, low production volume of input variables adaptable, in the near future replace the traditional steel industry draw type extension technologies. Anti-corrosion steel pipe because it is difficult to solve the supply of large diameter steel pipe, hot expaning pipe, large diameter steel pipe in the settlement of the problem of shortage is an important source of products. Simple large diameter steel pipe market supply tight. Straight seam steel mechanical performance test and flattening test, flaring test, and meet required standards. Tube should be able to absorb a certain amount of internal pressure, the pressure of 2.5 MPa necessary tests for a minute without leakage. Eddy current testing method can be replaced with the hydrostatic test. Eddy current testing GB7735 pipe eddy current testing method according to the standard. Eddy current testing method is to probe fixed to the frame, and weld inspection for 3? 5 mm distance from the rapid movement of welded steel full scan, automatic eddy current flaw detection signal processing and automatic sorting, achieve the purpose of checking.
Thermal expansion pipe using two-step expansion of the machine set-propelled flaring cone mold technology, digital intermediate frequency induction heating technology, hydraulic technology in one machine, with its rational process, lower energy consumption, lower capital investment, a good product quality, a wide range of raw materials and product specifications applicability, flexible variable low-input production batch adaptability, replace the steel industry pull aside the traditional style expanding technology. Difficult to resolve because the supply of large-diameter steel pipe became solve the shortage of large-diameter pipe source of important products to ease the supply of large diameter steel pipe market tensions.
Large diameter thermal expansion processing using two-step push Flaring Machine expanding technology, induction heating, hydraulic technology, and its reasonable method, the lower the power consumption to produce good quality products. Because of the wide range of raw materials as well as the applicability of product specifications, flexible and volatile, so instead of the traditional steel industry pull Dial expanding technology. It can be solved in the short term large supply of large diameter pipe, so the thermal expansion of technology will get into a lot of use. Thermal expansion pipe of large diameter cooling is achieved by controlling the cooling system, comprising: a fan, water pump. By frequency heating pipe after rolling temperature at 950 â,,? ~ 980 â,,?, and when the thermal expansion is not fully rolled out the tail pipe sizing machine, pipe rotation does not occur when the hot rolled pipe of large diameter tail completely out of the rack, you can Variable angle roller on a level surface at the same time set the tilt angle, so that the hot rolled of straight seam steel pipe with its axis along the rolling direction of the spiral forward, and ultimately achieve the cooling rate of technological requirements; subsequently implemented into said air cooled to room temperature, the cooling plate chain. heat expansion pipe applications: in recent years due to the increasing demand for large-diameter steel pipe, large diameter pipe production is also increasing, it can be said heat flaring technology well developed, this technique for the original production process is relatively advanced, lower production costs, and production quantity for a single species is not much requirements, so the heat expansion pipe later development of the market will get more use.
