Thermal expansion is a processing method of the steel pipe is a small-diameter steel pipe processingChengdu University diameter steel pipe. Thermal expansion pipe is slightly less than hot-rolled steelmechanical properties.

Restricted to limited specifications of steel seamless steel pipe, according to the needs of the end consumer so hot expanded steel pipe was born, the thermal expansion of pipe size models arbitrary,generally produced according to customer needs, the thermal expansion pipe is often said the thermal expansion of tubes, the density is relatively low but the contraction of the steel pipe of a strong(seamless pipe) can be referred to as thermal expansion. Expansion of the pipe diameter of a cross rolling method or the pull method

Thermal expansion pipe with two-step push tube expanding machine set conical die expanding technology,digital intermediate frequency induction heating technology, hydraulic technology in a machine with a reasonable process, low energy consumption, lower capital investment, good product quality, a wide range of applicability of the raw material and product specifications, flexible variable cost ofproduction volume, adaptability, replacing the traditional steel industry, pulling aside expandingtechnology. Difficult to resolve in the near future, the supply of large diameter steel pipe, hot expanded steel pipe to become an important source of the products to solve the shortage of large-diameter steel pipe to ease the tight supply situation of the large diameter pipe market.