Lined composite steel pipe

At present, the building water supply industry, high-rise building water supply and fire pipe is about long-term use of pressure 1.6MPa, therefore embedded in the plastic-lined steel bars designed to determine the pressure in 2.0MPa can basically meet the requirements of building water supply pressure Important parameters while this parameter is the thickness design. Pipe design temperature is an important parameter, which determines the material allowable stress. In the transport industry, according to the temperature of the water is divided into cold and hot water, cold water temperature is generally 0 ℃ ~ 25 ℃, but the inner surface mounted pipeline medium temperature by atmospheric temperature, summer temperatures in southern China up to about 40 ℃, while the north In winter temperatures can be lower than -40 ℃, but water freezes at below 0 ℃ ice, so water can not reach the goal. So there are some in the industry norm insulation, make pipe water temperature has remained above 0 ℃, in order to maintain a fluid may flow. Usually used for heating hot water, shower, the water temperature usually at 75 ℃, instantaneous temperature up to about 95 ℃. Between the above research, embedded within the gluten-lined steel pipe into cold water and hot water type two categories, long-term use to determine the type of cold water temperature is 0 ℃ ~ 55 ℃, hot water pipes of long-term use temperature of 0 ℃ ~ 75 ℃, instantaneous temperature up to 95 ℃. Specifications standardized by pipeline diameter is determined as DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300 and other varieties. Second, the production process unique: In the product structure to determine what technology of production is a vital economic activity, it is directly related to the cost of production and production efficiency, while in turn the product of the structural design, materials The selection process on request. Lined steel reinforcement embedded within a unique complex mechanical drawing process, through the metal tube necking oppression inner plastic tube, two materials cause permanent reasonable interference, coupled with the inner surface of the pipe inner ribs unique tread design Embed effect on the plastic surface of the tube, as well as physical and chemical modification of composite plastic pipe before such reinforcement embedded within the plastic-lined steel pipe with a non-hierarchical, indented tube, long-term use is guaranteed technical characteristics. And won the national utility model patents in 2001. This unique process to produce high efficiency, process control easy, high quality composite.